DATASHEET ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E FN6544 Rev 3.00 September 25, 2015 The Intersil ISL3293E, ISL3294E, ISL3295E, ISL3296E, ISL3297E, ISL3298E are 16.5kV HBM ESD Protected (7kV IEC61000 contact), 3.0V to 5.5V powered, single transmitters for balanced communication using the RS-485 and RS-422 standards. These drivers have very low bus currents (40mA), so they present less than a "1/8 unit load" to the RS-485 bus. This allows more than 256 transmitters on the network without violating the RS-485 specification's 32 unit load maximum, and without using repeaters. Features Hot Plug circuitry ensures that the Tx outputs remain in a high impedance state while the power supply stabilizes. * Hot plug - Tx outputs remain three-state during power-up The ISL3293E, ISL3294E, ISL3296E, ISL3297E utilize slew rate limited drivers which reduce EMI, and minimize reflections from improperly terminated transmission lines, or from unterminated stubs in multidrop and multipoint applications. Drivers on the ISL3295E and ISL3298E are not limited, so they can achieve the 20Mbps data rate. All versions are offered in industrial and extended industrial (-40C to +125C) temperature ranges. * High data rates. . . . . . . . . . . . . . . . . . . . . . . . . . up to 20Mbps * High ESD protection on RS-485 outputs . . . . 16.5kV HBM - IEC61000-4-2 contact test method . . . . . . . . . . . . . . . 7kV - Class 3 ESD level on all other pins. . . . . . . . . . . .>8kV HBM * Specified for +125C operation (VCC 3.6V only) * Logic supply pin (VL) eases operation in mixed supply systems (ISL3296E through ISL3298E only) * Low Tx leakage allows >256 devices on the bus * Low quiescent supply current. . . . . . . . . . . . . . . 150A (max) - Very low shutdown supply current . . . . . . . . . . . 1A (max) * -7V to +12V common-mode output voltage range (VCC 3.6V only) * Current limiting and thermal shutdown for driver overload protection (VCC 3.6V only) A 26% smaller footprint is available with the ISL3296E, ISL3297E, ISL3298E's TDFN package. These devices also feature a logic supply pin (VL) that sets the switching points of the DE and DI inputs to be compatible with a lower supply voltage in mixed voltage systems. * Tri-statable Tx outputs * 5V tolerant logic inputs when VCC 5V * Pb-free (RoHS compliant) For companion single RS-485 receivers in micro packages, please see the ISL3280E, ISL3281E, ISL3282E, ISL3283E, ISL3284E datasheet. Applications * Clock distribution * High node count systems * Space constrained systems * Security camera networks * Building environmental control/lighting systems * Industrial/process control networks TABLE 1. SUMMARY OF FEATURES PART NUMBER TX MAXIMUM DATA RATE SLEW RATE HOT VL ENABLE? QUIESCENT LOW POWER ICC (A) SHUTDOWN? FUNCTION (Mbps) LIMITED? PLUG? PIN? (Note 11) PIN COUNT ISL3293E (No longer available or supported, recommended replacement: ISL32613E) 1 Tx 0.25 YES YES NO YES 150 YES 6 Ld SOT ISL3294E (No longer available or supported, recommended replacement: ISL32614E) 1 Tx 0.5 YES YES NO YES 150 YES 6 Ld SOT ISL3295E 1 Tx 20 NO YES NO YES 150 YES 6 Ld SOT ISL3296E (No longer available or supported) 1 Tx 0.25 YES YES YES YES 150 YES 8 Ld TDFN ISL3297E (No longer available or supported) 1 Tx 0.5 YES YES YES YES 150 YES 8 Ld TDFN ISL3298E 1 Tx 20 NO YES YES YES 150 YES 8 Ld TDFN FN6544 Rev 3.00 September 25, 2015 Page 1 of 17 ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E Pin Configurations ISL3296E, ISL3297E, ISL3298E (8 LD TDFN) TOP VIEW ISL3293E, ISL3294E, ISL3295E (6 LD SOT-23) TOP VIEW DI 1 VCC 2 D DE 3 6 Y 5 GND 4 Z VL 1 DE 2 DI 3 GND 4 D 8 VCC 7 Z 6 Y 5 GND NOTE: BOTH GND PINS MUST BE CONNECTED Truth Tables Pin Descriptions TRANSMITTING INPUTS PIN NAME OUTPUTS DE (Note 11) DI Z Y 1 1 0 1 1 0 1 0 0 X High-Z * High-Z * NOTE: *Shutdown Mode FN6544 Rev 3.00 September 25, 2015 FUNCTION DE Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high, and are high impedance when DE is low. If the driver enable function isn't needed, connect DE to VCC (or VL) through a 1k to 3k resistor. DI Driver input. A low on DI forces output Y low and output Z high. Similarly, a high on DI forces output Y high and output Z low. GND Ground connection. This is also the potential of the TDFN thermal pad. Y 15kV HBM, 7kV IEC61000 (contact method) ESD Protected RS-485/422 level, noninverting transmitter output. Z 15kV HBM, 7kV IEC61000 (contact method) ESD Protected RS-485/422 level, inverting transmitter output. VCC System power supply input (3.0V to 5.5V). On devices with a VL pin powered from a separate supply, power-up VCC first. VL Logic-level supply which sets the VIL/VIH levels for the DI and DE pins (ISL3296E, ISL3297E, ISL3298E only). If VL and VCC are different supplies, power-up this supply after VCC, and keep VL VCC. Page 2 of 17 ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E Ordering Information PART MARKING (Note 4) PART NUMBER (Notes 1, 2, 3) TEMP. RANGE (C) PACKAGE (RoHS Compliant) PKG. DWG. # ISL3293EFHZ-T 293F (No longer available or supported, recommended replacement: ISL32613E) -40 to +125 6 Ld SOT-23 P6.064 ISL3293EIHZ-T 293I (No longer available or supported, recommended replacement: ISL32613E) -40 to +85 6 Ld SOT-23 P6.064 ISL3294EFHZ-T 294F (No longer available or supported, recommended replacement: ISL32614E) -40 to +125 6 Ld SOT-23 P6.064 ISL3294EIHZ-T 294I (No longer available or supported, recommended replacement: ISL32614E) -40 to +85 6 Ld SOT-23 P6.064 ISL3295EFHZ-T 295F -40 to +125 6 Ld SOT-23 P6.064 ISL3295EIHZ-T 295I -40 to +85 6 Ld SOT-23 P6.064 ISL3296EFRTZ-T (No longer available or supported) 96F -40 to +125 8 Ld TDFN L8.2x3A ISL3296EIRTZ-T (No longer available or supported) 96I -40 to +85 8 Ld TDFN L8.2x3A ISL3297EFRTZ-T (No longer available or supported) 97F -40 to +125 8 Ld TDFN L8.2x3A ISL3297EIRTZ-T (No longer available or supported) 97I -40 to +85 8 Ld TDFN L8.2x3A ISL3298EFRTZ-T 98F -40 to +125 8 Ld TDFN L8.2x3A ISL3298EIRTZ-T (No longer available or supported) 98I -40 to +85 8 Ld TDFN L8.2x3A NOTES: 1. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 2. Please refer to TB347 for details on reel specifications. 3. For Moisture Sensitivity Level (MSL), please see product information page for ISL3293E, ISL3294E, ISL3295E, ISL3296E, ISL3297E, ISL3298E. For more information on MSL, please see tech brief TB363. 4. SOT-23 "PART MARKING" is branded on the bottom side. FN6544 Rev 3.00 September 25, 2015 Page 3 of 17 ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E Typical Operating Circuits +3.3V TO 5V +3.3V + 1 VCC 0.1F 0.1F + 2 VCC ISL3281E 3 RO R ISL329xE A 6 B 4 RT 6 Y 4 Z D 5 RE DI 1 DE 3 GND GND 2 5 FIGURE 1. NETWORK WITH ENABLES +3.3V TO 5V +3.3V + 1 VCC 0.1F 0.1F + 2 R 3 VCC ISL3280E 3 RO 1k TO 3k Note 10 ISL329xE A 5 B 4 RT 6 Y 4 Z DE D GND GND 2 5 DI 1 FIGURE 2. NETWORK WITHOUT ENABLE 2.5V +3.3V TO 5V +3.3V + 4 VCC 6 VCC LOGIC DEVICE (P, ASIC, UART) VL 0.1F 0.1F 8 R 1 VL VCC ISL3282E 1 RO 1.8V + ISL3298E A 5 B 8 RT 6 Y 7 Z D 7 RE DI 3 DE 2 GND 2 NOTE: IF POWERED FROM SEPARATE SUPPLIES, POWER-UP VCC BEFORE VL VCC LOGIC DEVICE (P, ASIC, UART) GND 4, 5 FIGURE 3. NETWORK WITH VL PIN FOR INTERFACING TO LOWER VOLTAGE LOGIC DEVICES FN6544 Rev 3.00 September 25, 2015 Page 4 of 17 ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E Absolute Maximum Ratings Thermal Information VCC to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V VL to GND (ISL3296E thru ISL3298E Only) . . . . . . . . -0.3V to (VCC + 0.3V) Input Voltages DI, DE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V Output Voltages Y, Z (VCC 3.6V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +13V Y, Z (VCC > 3.6V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to VCC +0.5V Short-circuit Duration Y, Z (VCC 3.6V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous Y, Z (VCC > 3.6V, Note 13) . . . . . . . . . . . . . . . . . . . . . . . . . 1s at <300mA ESD Rating . . . . . . . . . . . . . . . . . . See Electrical Specifications on page 6 Thermal Resistance (Typical) JA (C/W) JC (C/W) 6 Ld SOT-23 Package (Note 5) . . . . . . . . . . 177 N/A 8 Ld TDFN Package (Notes 6, 7). . . . . . . . . 65 8 Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . +150C Maximum Storage Temperature Range . . . . . . . . . . . . . .-65C to +150C Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493 Operating Conditions Temperature Range F Suffix (VCC 3.6V only). . . . . . . . . . . . . . . . . . . . . . . . .-40C to +125C I Suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40C to +85C CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty. NOTES: 5. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 6. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with "direct attach" features. See Tech Brief TB379. 7. For JC, the "case temp" location is the center of the exposed metal pad on the package underside. Electrical Specifications Test Conditions: VCC = 3.0V to 5.5V, VL = VCC (ISL3296E, ISL3297E, ISL3298E only), typicals are at TA = +25C, unless otherwise specified. (Note 8) PARAMETER SYMBOL TEMP (C) MIN (Note 12) TYP (Note 14) MAX (Note 12) UNIT VCC 3.15V Full 2 2.3 - V VCC 4.5V Full 3 3.8 - V VCC 3.0V Full 1.5 2 VCC V VCC 4.5V Full 2.5 3.4 VCC V TEST CONDITIONS DC CHARACTERISTICS Driver Differential VOUT VOD RL = 100 (RS-422) (Figure 4A) RL = 54 (RS-485) (Figure 4A) Change in Magnitude of Driver Differential VOUT for Complementary Output States VOD No load Full - - VCC RL = 60, -7V VCM 12V (Figure 4B) Full 1.5 2, 3.4 - V RL = 54 or 100 (Figure 4A) Full - 0.01 0.2 V VCC 3.6V Full - 2 3 V VCC 5.5V Driver Common-mode VOUT VOC RL = 54 or 100 (Figure 4A) Full - - 3.2 V Change in Magnitude of Driver Common-mode VOUT for Complementary Output States VOC RL = 54 or 100 (Figure 4A) Full - 0.01 0.2 V VIH1 VL = VCC if ISL3296E, ISL3297E, ISL3298E VCC 3.6V Full 2.2 - - V VCC 5.5V Full 3 - - V Input High Voltage (DI, DE) VIH2 FN6544 Rev 3.00 September 25, 2015 VIH3 2.7V VL < 3.0V (ISL3296E, ISL3297E, ISL3298E only) Full 2 - - V VIH4 2.3V VL < 2.7V (ISL3296E, ISL3297E, ISL3298E only) Full 1.65 - - V VIH5 1.6V VL < 2.3V (ISL3296E, ISL3297E, ISL3298E only) Full 0.7*VL - - V VIH6 1.35V VL < 1.6V (ISL3296E, ISL3297E, ISL3298E only) 25 - 0.5*VL - V Page 5 of 17 ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E Electrical Specifications Test Conditions: VCC = 3.0V to 5.5V, VL = VCC (ISL3296E, ISL3297E, ISL3298E only), typicals are at TA = +25C, unless otherwise specified. (Note 8) (Continued) PARAMETER Input Low Voltage (DI, DE) SYMBOL TEST CONDITIONS TEMP (C) MIN (Note 12) TYP (Note 14) MAX (Note 12) UNIT VIL1 VL = VCC if ISL3296E, ISL3297E, ISL3298E Full - - 0.8 V VIL2 VL 2.7V (ISL3296E, ISL3297E, ISL3298E only) Full - - 0.8 V VIL3 2.3V VL < 2.7V (ISL3296E, ISL3297E, ISL3298E only) Full - - 0.65 V VIL4 1.6V VL < 2.3V (ISL3296E, ISL3297E, ISL3298E only) Full - - 0.22*VL V VIL5 1.35V VL < 1.6V (ISL3296E, ISL3297E, ISL3298E only) 25 - 0.3*VL - V Logic Input Current IIN DI = DE = 0V or VCC (Note 11) Full -2 - 2 A Output Leakage Current (Y, Z, Note 11) IOZ DE = 0V, VIN = 12V VCC = 0V, 3.6V, or 5.5V VIN = -7V Full - 0.1 40 A Full -40 -10 - A DE = VCC, -7V VO 12V, VCC 3.6V Full - - 250 mA DE = VCC, 0V VO VCC, VCC > 3.6V (Note 13) Full - - 450 mA Full - 160 - C Full - 120 150 A DE = 0V, DI = 0V or VCC Full - 0.01 1 A Human Body Model, from bus pins to GND 25 - 16.5 - kV IEC61000 Contact, from bus pins to GND 25 - 7 - kV Driver Short-circuit Current, VO = High or Low (Note 9) Thermal Shutdown Threshold IOSD1 TSD SUPPLY CURRENT No-load Supply Current Shutdown Supply Current ICC ISHDN DI = 0V or VCC DE = VCC ESD PERFORMANCE RS-485 Pins (Y, Z) All Pins HBM, per MIL-STD-883 Method 3015 25 - 8 - kV Machine Model 25 - 400 - V DRIVER SWITCHING CHARACTERISTICS (ISL3293E, ISL3296E, 250kbps) Maximum Data Rate Driver Single-ended Output Delay fMAX VOD = 1.5V, CD = 820pF (Figure 7) Full 250 - - kbps tSD RDIFF = 54, CD = 50pF (Figure 5) Full 400 1350 1700 ns Part-to-part Output Delay Skew tSKPP RDIFF = 54, CD = 50pF (Figure 5, Note 10) Full - - 900 ns Driver Single-ended Output Skew tSSK RDIFF = 54, CD = 50pF (Figure 5) Full - 600 750 ns Driver Differential Output Delay tDD RDIFF = 54 CD = 50pF (Figure 5) Full 400 1100 1500 ns Driver Differential Output Skew tDSK RDIFF = 54, CD = 50pF (Figure 5) Full - 4, 1 30 ns Driver Differential Rise or Fall Time tR, tF RDIFF = 54, CD = 50pF (Figure 5) Full 400 960 1500 ns 25 - 1300 - ns Driver Enable to Output High tZH RL = 500, CL = 50pF, SW = GND (Figure 6) Full - 100, 60 250 ns Driver Enable to Output Low tZL RL = 500, CL = 50pF, SW = VCC (Figure 6) Full - 60, 35 250 ns Driver Disable from Output High tHZ RL = 500, CL = 50pF, SW = GND (Figure 6) Full - 30, 22 60 ns Driver Disable from Output Low tLZ RL = 500, CL = 50pF, SW = VCC (Figure 6) Full - 25, 20 60 ns VCC 3.6V VCC = 5V DRIVER SWITCHING CHARACTERISTICS (ISL3294E, ISL3297E, 500kbps) Maximum Data Rate Driver Single-ended Output Delay fMAX VOD = 1.5V, CD = 820pF (Figure 7) Full 500 - - kbps tSD RDIFF = 54, CD = 50pF (Figure 5) Full 200 340 500 ns Part-to-part Output Delay Skew tSKPP RDIFF = 54, CD = 50pF (Figure 5, Note 10) Full - - 300 ns Driver Single-ended Output Skew tSSK RDIFF = 54, CD = 50pF (Figure 5) Full - 30, 80 150 ns Driver Differential Output Delay tDD RDIFF = 54, CD = 50pF (Figure 5) Full 200 345 500 ns FN6544 Rev 3.00 September 25, 2015 Page 6 of 17 ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E Electrical Specifications Test Conditions: VCC = 3.0V to 5.5V, VL = VCC (ISL3296E, ISL3297E, ISL3298E only), typicals are at TA = +25C, unless otherwise specified. (Note 8) (Continued) TEMP (C) MIN (Note 12) TYP (Note 14) MAX (Note 12) UNIT RDIFF = 54, CD = 50pF (Figure 5) Full - 2 30 ns RDIFF = 54, CD = 50pF (Figure 5) Full 200 350 800 ns RL = 500, CL = 50pF, SW = GND (Figure 6) Full - 100, 60 250 ns RL = 500, CL = 50pF, SW = VCC (Figure 6) Full - 60, 35 250 ns PARAMETER SYMBOL TEST CONDITIONS Driver Differential Output Skew tDSK Driver Differential Rise or Fall Time tR, tF Driver Enable to Output High tZH Driver Enable to Output Low tZL Driver Disable from Output High tHZ RL = 500, CL = 50pF, SW = GND (Figure 6) Full - 30, 22 60 ns Driver Disable from Output Low tLZ RL = 500, CL = 50pF, SW = VCC (Figure 6) Full - 25, 20 60 ns VOD = 1.5V, CD = 360pF (Figure 7) Full 20 - - Mbps RDIFF = 54, CD = 50pF (Figure 5) VL = VCC Full 15 29, 23 42 ns VL 1.8V 25 - 32 - ns DRIVER SWITCHING CHARACTERISTICS (ISL3295E, ISL3298E, 20Mbps) Maximum Data Rate Driver Single-ended Output Delay fMAX tSD VL = 1.5V 25 - 36 - ns VL = 1.35V 25 - 40 - ns Part-to-part Output Delay Skew tSKPP RDIFF = 54, CD = 50pF (Figure 5, Note 10) Full - - 25 ns Driver Single-ended Output Skew tSSK RDIFF = 54, CD = 50pF (Figure 5) Full - 3 7 ns VL 1.8V 25 - 3 - ns VL = 1.5V 25 - 4 - ns VL = 1.35V 25 - 5 - ns VL = VCC Full - 29, 22 42 ns VL 1.8V 25 - 32 - ns VL = 1.5V 25 - 36 - ns VL = 1.35V 25 - 42 - ns VL = VCC 3.6V Full - 0.5 3 ns VL = VCC = 5V 25 - 2 - ns VL 1.8V 25 - 0.5, 1 - ns VL 1.5V 25 - 1, 2 - ns VL = 1.35V 25 - 2, 4 - ns VL = VCC Full - 9 15 ns VL 1.35V 25 - 9 - ns Driver Differential Output Delay Driver Differential Output Skew tDD tDSK RDIFF = 54, CD = 50pF (Figure 5) RDIFF = 54, CD = 50pF (Figure 5) RDIFF = 54, CD = 50pF (Figure 5) VL = VCC Driver Differential Rise or Fall Time tR, tF Driver Enable to Output High tZH RL = 500, CL = 50pF, SW = GND (Figure 6) Full - 100, 60 250 ns Driver Enable to Output Low tZL RL = 500, CL = 50pF, SW = VCC (Figure 6) Full - 60, 35 250 ns Driver Disable from Output High tHZ RL = 500 CL = 50pF, SW = GND (Figure 6) Full - 30, 22 60 ns Driver Disable from Output Low tLZ RL = 500, CL = 50pF, SW = VCC (Figure 6) Full - 25, 20 60 ns NOTES: 8. All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise specified. 9. Applies to peak current. See "Typical Performance Curves" on page 11 for more information. 10. tSKPP is the magnitude of the difference in propagation delays of the specified terminals of two units tested with identical test conditions (VCC, temperature, etc.). 11. If the driver enable function isn't needed, connect DE to VCC (or VL) through a 1k to 3k resistor. 12. Parts are 100% tested at +25C. Over-temperature limits established by characterization and are not production tested. 13. Due to the high short-circuit current at VCC > 3.6V, the outputs must not be shorted outside the range of GND to VCC or damage may occur. To prevent excessive power dissipation that may damage the output, the short-circuit current should be limited to 300mA during testing. It is best to use an external resistor for this purpose, since the current limiting on the VO supply may respond too slowly to protect the output. 14. Typicals are measured at VCC = 3.3V for parameters specified with 3V VCC 3.6V, and are measured at VCC = 5V for parameters specified with 4.5V VCC 5.5V. If VCC isn't specified, then a single "TYP" entry applies to both VCC = 3.3V and 5V, and two entries separated by a comma refer to VCC = 3.3V and 5V, respectively. FN6544 Rev 3.00 September 25, 2015 Page 7 of 17 ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E Test Circuits and Waveforms VCC OR VL RL/2 DE DI Z DI VOD D 375 DE VCC OR VL Z Y VCM RL = 60 VOD D -7V TO +12V Y VOC RL/2 375 FIGURE 4B. VOD WITH COMMON-MODE LOAD FIGURE 4A. VOD AND VOC FIGURE 4. DC DRIVER TEST CIRCUITS 3V OR VL DI 50% 50% 0V VCC OR VL tSD2 tSD1 DE VOH OUT (Z) Z DI RDIFF D 50% CD 50% VOL OUT (Y) Y tDDLH SIGNAL GENERATOR DIFF OUT (Y - Z) tDDHL 90% 50% 10% tR -VOD tF tDSK = |tDDLH - tDDHL| tSSK = |tSD1(Y) - tSD2(Y)| OR |tSD1(Z) - tSD2(Z)| FIGURE 5A. TEST CIRCUIT +VOD 90% 50% 10% FIGURE 5B. MEASUREMENT POINTS FIGURE 5. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES DE DI SIGNAL GENERATOR Z 500 VCC D SW Y 3V OR VL DE 50% GND 50% 0V 50pF tZH OUTPUT HIGH OUTPUT DI SW tHZ Y/Z 1/0 GND tLZ Y/Z 0/1 VCC tZH Y/Z 1/0 GND tZL Y/Z 0/1 VCC VOH - 0.25V 50% OUT (Y, Z) PARAMETER tHZ 0V tZL tLZ VCC OUT (Y, Z) 50% VOL + 0.25V V OUTPUT LOW FIGURE 6A. TEST CIRCUIT VOH OL FIGURE 6B. MEASUREMENT POINTS FIGURE 6. DRIVER ENABLE AND DISABLE TIMES FN6544 Rev 3.00 September 25, 2015 Page 8 of 17 ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E Test Circuits and Waveforms (Continued) VCC OR VL DE 54 D 3V OR VL + Z DI CD Y VOD DI 0V - SIGNAL GENERATOR +VOD DIFF OUT (Y - Z) -VOD FIGURE 7A. TEST CIRCUIT 0V FIGURE 7B. MEASUREMENT POINTS FIGURE 7. DRIVER DATA RATE Application Information RS-485 and RS-422 are differential (balanced) data transmission standards for use in long haul or noisy environments. RS-422 is a subset of RS-485, so RS-485 transmitters and receivers are also RS-422 compliant. RS-422 is a point-to-multipoint (multidrop) standard, which allows only one driver and up to 10 (assuming one unit load devices) receivers on each bus. RS-485 is a true multipoint standard, which allows up to 32 one unit load devices (any combination of drivers and receivers) on each bus. To allow for multipoint operation, the RS-485 specification requires that drivers must handle bus contention without sustaining any damage. Another important advantage of RS-485 is the extended Common-Mode Range (CMR), which specifies that the driver outputs and receiver inputs withstand signals that range from +12V to -7V. RS-422 and RS-485 are intended for runs as long as 4000', so the wide CMR is necessary to handle ground potential differences, as well as voltages induced in the cable by external fields. Driver Features These RS-485/RS-422 drivers are differential output devices that delivers at least 1.5V across a 54 load (RS-485) and at least 2V across a 100 load (RS-422). The drivers feature low propagation delay skew to maximize bit width and to minimize EMI. All drivers are tri-statable via the active high DE input. If the Tx enable function is not needed, tie DE to VCC (or VL) through a 1k to 3k resistor. The 250kbps and 500kbps driver outputs are slew rate limited to minimize EMI, and to reduce reflections in unterminated or improperly terminated networks. Outputs of the ISL3295E and ISL3298E drivers are not limited, so faster output transition times allow data rates of at least 20Mbps. FN6544 Rev 3.00 September 25, 2015 Wide Supply Range The ISL3293E through ISL3298E are optimized for 3.3V operation, but can be operated with supply voltages as high as 5.5V. These devices meet the RS-422 and RS-485 specifications for supply voltages less than 4V, and are RS-422 and RS-485 compatible for supplies greater than 4V. Operation at +125C requires VCC 3.6V, while 5V operation requires adding output current limiting resistors (as described in the "Driver Overload Protection" on page 10) if output short-circuits (e.g., from bus contention) are a possibility. 5.5V Tolerant Logic Pins Logic input pins (DI, DE) contain no ESD nor parasitic diodes to VCC (nor to VL), so they withstand input voltages exceeding 5.5V regardless of the VCC and VL voltages. Logic Supply (VL Pin, ISL3296E through ISL3298E) Note: If powered from separate supplies, power-up VCC before powering up the VL supply and keep VL VCC. The ISL3296E through ISL3298E include a VL pin that powers the logic inputs (DI and DE). These pins interface with "logic" devices such as UARTs, ASICs, and controllers, and today most of these devices use power supplies significantly lower than 3.3V. Thus, the logic device's low VOH might not exceed the VIH of a 3.3V or 5V powered DI or DE input. Connecting the VL pin to the power supply of the logic device (as shown in Figure 8) reduces the DI and DE input switching points to values compatible with the logic device's output levels. Tailoring the logic pin input switching points and output levels to the supply voltage of the UART, ASIC, or controller eliminates the need for a level shifter/translator between the two ICs. Page 9 of 17 ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E VCC = +3.3V DI DE outputs remain disabled for a period of time, regardless of the state of DE. This gives the processor/ASIC a chance to stabilize and drive the RS-485 control lines to the proper states. VCC = +2V VIH 2V ESD Protection TXD VOH 2V VIH 2V VOH 2V GND ISL3293E DEN GND UART/PROCESSOR VCC = +3.3V VCC = +2V VL DI DE VIH = 1.4V TXD VOH 2V Data Rate, Cables and Terminations VIH = 1.4V GND VOH 2V ISL3296E DEN GND UART/PROCESSOR FIGURE 8. USING VL PIN TO ADJUST LOGIC LEVELS VL can be anywhere from VCC down to 1.35V, but the input switching points may not provide enough noise margin and 20Mbps data rates may not be achievable, when VL < 1.5V. Table 2 indicates typical VIH and VIL values for various VL settings so the user can ascertain whether or not a particular VL voltage meets his needs. TABLE 2. VIH AND VIL vs VL FOR VCC = 3.3V OR 5V VL (V) VIH (V) VIL (V) 1.35 0.7 0.4 1.5 0.8 0.5 1.8 0.9 0.7 2.3 1.1 1.0 2.7 1.3 1.1 3.3 1.5 1.4 5.0 (i.e., VCC) 2.7 2.3 The VL supply current (IL) is typically much less than 20A, as shown in Figure 12 on page 11, when DE and DI are above/below VIH/VIL. Hot Plug Function When a piece of equipment powers up, there is a period of time where the processor or ASIC driving the RS-485 control line (DE) is unable to ensure that the RS-485 Tx outputs are kept disabled. If the equipment is connected to the bus, a driver activating prematurely during power-up may crash the bus. To avoid this scenario, the ISL329xE family incorporates a "Hot Plug" function. During power-up, circuitry monitoring VCC ensures that the Tx FN6544 Rev 3.00 September 25, 2015 All pins on these devices include class 3 (8kV) Human Body Model (HBM) ESD protection structures, but the RS-485 pins (driver outputs) incorporate advanced structures allowing them to survive ESD events in excess of 16.5kV HBM and 7kV to the IEC61000 contact test method. The RS-485 pins are particularly vulnerable to ESD damage because they typically connect to an exposed port on the exterior of the finished product. Simply touching the port pins, or connecting a cable, can cause an ESD event that might destroy unprotected ICs. These new ESD structures protect the device whether or not it is powered up and without degrading the RS-485 common-mode range of -7V to +12V. This built-in ESD protection eliminates the need for board level protection structures (e.g., transient suppression diodes) and the associated, undesirable capacitive load they present. RS-485/RS-422 are intended for network lengths up to 4000', but the maximum system data rate decreases as the transmission length increases. Devices operating at 20Mbps are limited to lengths less than 100', while the 250kbps versions can operate at full data rates with lengths of several 1000'. Twisted pair is the cable of choice for RS-485/RS-422 networks. Twisted pair cables tend to pick up noise and other electromagnetically induced voltages as common-mode signals, which are effectively rejected by the differential receivers in these ICs. Proper termination is imperative, when using the 20Mbps devices, to minimize reflections. Short networks using the 250kbps versions need not be terminated, but, terminations are recommended unless power dissipation is an overriding concern. In point-to-point, or point-to-multipoint (single driver on bus) networks, the main cable should be terminated in its characteristic impedance (typically 120) at the end farthest from the driver. In multireceiver applications, stubs connecting receivers to the main cable should be kept as short as possible. Multipoint (multidriver) systems require that the main cable be terminated in its characteristic impedance at both ends. Stubs connecting a transmitter or receiver to the main cable should be kept as short as possible. Driver Overload Protection As stated previously, the RS-485 specification requires that drivers survive worst case bus contentions undamaged. These drivers meet this requirement, for VCC 3.6V, via driver output short-circuit current limits and on-chip thermal shutdown circuitry. The driver output stages incorporate short-circuit current limiting circuitry, which ensures that the output current never exceeds the RS-485 specification, for VCC 3.6V, even at the common-mode voltage range extremes. Additionally, these devices utilize a foldback circuit which reduces the short-circuit current and thus the power dissipation, whenever the contending voltage exceeds either VCC or GND. Page 10 of 17 ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E In the event of a major short-circuit condition, devices also include a thermal shutdown feature that disables the drivers whenever the die temperature becomes excessive. This eliminates the power dissipation, allowing the die to cool. The drivers automatically reenable after the die temperature drops about +20C. If the contention persists, the thermal shutdown/reenable cycle repeats until the fault is cleared. At VCC > 3.6V, the instantaneous short-circuit current is high enough that output stage damage may occur during short-circuit conditions to voltages outside of GND to VCC, before the short-circuit limiting and thermal shutdown activate. For VCC = 5V operation, if output short-circuits are a possibility (e.g., due to bus contention), it is recommended that a 5 resistor be inserted in series with each output. This resistor limits the instantaneous current below levels that can cause damage. The driver VOD at VCC = 5V is so large that this small added resistance has little impact. Typical Performance Curves High Temperature Operation Due to power dissipation and instantaneous output short-circuit current levels at VCC = 5V, these transmitters may not be operated at +125C with VCC > 3.6V. At VCC = 3.6V, even the SOT-23 versions may be operated at +125C, while driving a 100', double terminated, CAT 5 cable at 20Mbps, without triggering the thermal SHDN circuit. Low Power Shutdown Mode These BiCMOS transmitters all use a fraction of the power required by their bipolar counterparts, but they also include a shutdown feature that reduces the already low quiescent ICC to a 1A trickle. These devices enter shutdown whenever the driver disables (DE = GND). VCC = VL = 3.3V, TA = +25C, unless otherwise specified. 2.4 DIFFERENTIAL OUTPUT VOLTAGE (V) DRIVER OUTPUT CURRENT (mA) 110 100 90 +85C 80 +25C 70 +125C 60 50 40 30 20 10 0 +25C 0 0.5 1.0 1.5 2.0 2.5 3.0 DIFFERENTIAL OUTPUT VOLTAGE (V) RDIFF = 100 2.2 2.1 2.0 RDIFF = 54 1.9 1.8 1.7 1.6 1.5 -40 3.5 FIGURE 9. DRIVER OUTPUT CURRENT vs DIFFERENTIAL OUTPUT VOLTAGE 2.3 10 -15 60 35 TEMPERATURE (C) 110 125 85 FIGURE 10. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs TEMPERATURE 40 100 VCC = 3.3V 35 90 VL = 3.3V 80 30 25 60 IL (A) ICC (A) 70 50 40 20 15 30 VL = 2.5V 10 20 5 10 0 DE = VCC = VL -40 -15 10 35 60 85 TEMPERATURE (C) FIGURE 11. SUPPLY CURRENT vs TEMPERATURE FN6544 Rev 3.00 September 25, 2015 110 125 0 VL 2V 0 1 2 3 4 5 6 7 7.5 DI VOLTAGE (V) FIGURE 12. VL SUPPLY CURRENT vs LOGIC PIN VOLTAGE Page 11 of 17 ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E Typical Performance Curves VCC = VL = 3.3V, TA = +25C, unless otherwise specified. (Continued) 1250 700 VL = 1.35V TO VCC tDDLH 600 tSSK 1200 500 tDDHL 1175 SKEW (ns) PROPAGATION DELAY (ns) 1225 1150 1125 400 VL = 1.35V TO VCC 300 200 1100 100 1075 tDSK 1050 -40 10 -15 35 60 85 0 -40 110 125 -15 10 TEMPERATURE (C) FIGURE 13. DRIVER DIFFERENTIAL PROPAGATION DELAY vs TEMPERATURE (ISL3293E, ISL3296E) 60 85 110 125 FIGURE 14. DRIVER SKEW vs TEMPERATURE (ISL3293E, ISL3296E) 60 390 VL = 1.35V TO VCC VL = 1.35V TO VCC 380 50 370 40 SKEW (ns) PROPAGATION DELAY (ns) 35 TEMPERATURE (C) 360 350 tSSK 30 20 tDDHL 340 10 tDDLH 330 -40 -15 tDSK 10 35 60 85 0 -40 110 125 -15 10 TEMPERATURE (C) 35 60 85 110 125 TEMPERATURE (C) FIGURE 15. DRIVER DIFFERENTIAL PROPAGATION DELAY vs TEMPERATURE (ISL3294E, ISL3297E) FIGURE 16. DRIVER SKEW vs TEMPERATURE (ISL3294E, ISL3297E) 50 4.5 4.0 40 VL = 1.35V, tDDLH 3.5 VL = 1.35V, tDDHL 3.0 VL = 1.5V, tDDLH, tDDHL SKEW (ns) PROPAGATION DELAY (ns) 45 35 30 VL = 1.8V, tDDLH, tDDHL VL = 1.35V 2.5 2.0 1.5 VL = 1.5V 1.0 25 20 -40 VL = VCC, tDDLH, tDDHL -15 10 0.5 35 60 85 110 125 TEMPERATURE (C) FIGURE 17. DRIVER DIFFERENTIAL PROPAGATION DELAY vs TEMPERATURE (ISL3295E, ISL3298E) FN6544 Rev 3.00 September 25, 2015 0 -40 VL 1.8V -15 10 35 60 85 110 125 TEMPERATURE (C) FIGURE 18. DRIVER DIFFERENTIAL SKEW vs TEMPERATURE (ISL3295E, ISL3298E) Page 12 of 17 ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E Typical Performance Curves VCC = VL = 3.3V, TA = +25C, unless otherwise specified. (Continued) 200 6 ISL3295E/ISL3298E VL = 1.35V 150 5 VL = 1.5V 3 VL 1.8V 2 Y OR Z = LOW 50 0 -50 Y OR Z = HIGH 1 -100 -150 -15 10 35 60 85 110 125 ISL329xE -7 -6 -4 -2 TEMPERATURE (C) 0 1.5 Z Y 0 DRIVER OUTPUT (V) 3 2 1 Y-Z 0 DRIVER OUTPUT (V) 3 DRIVER INPUT (V) DRIVER OUTPUT (V) DRIVER OUTPUT (V) RDIFF = 54, CD = 50pF 3.0 -1 -2 -3 0 DRIVER OUTPUT (V) 3 2 1 0 Y-Z -1 -2 -3 TIME (200ns/DIV) FIGURE 23. DRIVER WAVEFORMS, LOW-TO-HIGH (ISL3294E, ISL3297E) FN6544 Rev 3.00 September 25, 2015 DRIVER OUTPUT (V) 1.5 DRIVER INPUT (V) DRIVER OUTPUT (V) DRIVER OUTPUT (V) 0 Z 3 DI 0 3.0 1.5 Y Z 0 3 2 1 0 Y-Z -1 -2 -3 TIME (400ns/DIV) 3 Y 12 FIGURE 22. DRIVER WAVEFORMS, HIGH-TO-LOW (ISL3293E, ISL3296E) RDIFF = 54, CD = 50pF 3.0 10 RDIFF = 54, CD = 50pF TIME (400ns/DIV) FIGURE 21. DRIVER WAVEFORMS, LOW-TO-HIGH (ISL3293E, ISL3296E) DI 8 FIGURE 20. DRIVER OUTPUT CURRENT vs SHORT-CIRCUIT VOLTAGE FIGURE 19. DRIVER SINGLE-ENDED SKEW vs TEMPERATURE (ISL3295E, ISL3298E) DI 0 2 4 6 OUTPUT VOLTAGE (V) DRIVER INPUT (V) 0 -40 RDIFF = 54, CD = 50pF 3 DI 0 3.0 1.5 Y Z 0 3 2 1 0 -1 -2 -3 Y-Z TIME (200ns/DIV) FIGURE 24. DRIVER WAVEFORMS, HIGH-TO-LOW (ISL3294E, ISL3297E) Page 13 of 17 DRIVER INPUT (V) SKEW (ns) 4 OUTPUT CURRENT (mA) OTHER ISL329xE 100 ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E 0 3.0 Z Y 1.5 0 3 2 1 Y-Z 0 -1 -2 -3 0 3.0 1.5 Y Z 0 3 2 1 Y-Z 0 -1 -2 -3 TIME (10ns/DIV) TIME (10ns/DIV) DI 0 3.0 1.5 Z Y 0 3 2 1 0 Y-Z -1 -2 -3 TIME (10ns/DIV) FIGURE 27. DRIVER WAVEFORMS, LOW-TO-HIGH (ISL3295E, ISL3298E) DRIVER OUTPUT (V) 3 DRIVER INPUT (V) DRIVER OUTPUT (V) DRIVER OUTPUT (V) RDIFF = 54 CD = 50pF DRIVER OUTPUT (V) FIGURE 26. DRIVER WAVEFORMS, HIGH-TO-LOW (ISL3295E, ISL3298E) FIGURE 25. DRIVER WAVEFORMS, LOW-TO-HIGH (ISL3295E, ISL3298E) VL = 1.35V 3 DI RDIFF = 54, CD = 50pF VL = 1.35V 3 DI 0 3.0 1.5 Y Z 0 3 2 1 0 -1 -2 -3 Y-Z TIME (10ns/DIV) FIGURE 28. DRIVER WAVEFORMS, HIGH-TO-LOW (ISL3295E, ISL3298E) Die Characteristics SUBSTRATE AND TDFN THERMAL PAD POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: 516 PROCESS: Si Gate BiCMOS FN6544 Rev 3.00 September 25, 2015 Page 14 of 17 DRIVER INPUT (V) DI RDIFF = 54, CD = 50pF DRIVER INPUT (V) 3 DRIVER OUTPUT (V) RDIFF = 54, CD = 50pF DRIVER INPUT (V) VCC = VL = 3.3V, TA = +25C, unless otherwise specified. (Continued) DRIVER OUTPUT (V) DRIVER OUTPUT (V) DRIVER OUTPUT (V) Typical Performance Curves ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to the web to make sure that you have the latest revision. DATE REVISION CHANGE September 25, 2015 FN6544.3 On page 1, table 1, for ISL3293E entry, added "Recommended replacement: ISL32613E" after "No longer available or supported". For ISL3294E entry, added "Recommended replacement: ISL32614E" after "No longer available or supported". On page 3, "Ordering Information" table, for ISL3293E entries (rows 1 and 2), added "Recommended replacement: ISL32613E" after "No longer available or supported". For ISL3294E entries (rows 3 and 4), added "Recommended replacement: ISL32614E" after "No longer available or supported". July 27, 2015 FN6544.2 Table 1 Summary of Features on page 1, added "No longer available or supported" to ISL3293E, ISL3294E, ISL3296E, ISL3297E. Ordering Information table on page 3, added "No longer available or supported" to the following parts: ISL3293E and ISL3294E (1st 4 rows) and to ISL3296E and ISL3297E (rows 7-10). Electrical Spec table, added "(Parts no longer available or supported)" to DRIVER SWITCHING CHARACTERISTICS sections on page 6 (for parts ISL3293E, ISL3296E and ISL3294E, ISL3297E). POD on page 16, updated from ref 1 to rev 2. Changes since rev 1: Tiebar Note updated From: Tiebar shown (if present) is a non-functional feature. To: Tiebar shown (if present) is a non-functional feature and may be located on any of the 4 sides (or ends). December 11, 2014 FN6544.1 Updated entire datasheet to Intersil new standard. Added text in several places to clarify that VL can be connected to Vcc. Updated PODs P6.064 and L8.2x3A to latest revisions with changes as follows: Updated to new POD format by removing table listing dimensions and moving dimensions onto drawing. Added Typical Recommended Land Pattern. September 19, 2007 FN6544.0 Initial Release. About Intersil Intersil Corporation is a leading provider of innovative power management and precision analog solutions. The company's products address some of the largest markets within the industrial and infrastructure, mobile computing and high-end consumer markets. For the most updated datasheet, application notes, related documentation and related parts, please see the respective product information page found at www.intersil.com. You may report errors or suggestions for improving this datasheet by visiting www.intersil.com/ask. Reliability reports are also available from our website at www.intersil.com/support (c) Copyright Intersil Americas LLC 2007-2015. All Rights Reserved. All trademarks and registered trademarks are the property of their respective owners. For additional products, see www.intersil.com/en/products.html Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted in the quality certifications found at www.intersil.com/en/support/qualandreliability.html Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com FN6544 Rev 3.00 September 25, 2015 Page 15 of 17 ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E Package Outline Drawing P6.064 6 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE Rev 4, 2/10 0-8 1.90 0.95 0.08-0.22 D A 6 5 4 2.80 PIN 1 INDEX AREA 1.60 +0.15/-0.10 3 3 (0.60) 1 2 3 0.20 C 2x 0.40 0.10 B SEE DETAIL X 3 0.20 M C A-B D END VIEW TOP VIEW 10 TYP (2 PLCS) 2.90 0.10 3 1.15 +0.15/-0.25 C 0.10 C SEATING PLANE 0.00-0.15 SIDE VIEW (0.25) GAUGE PLANE 1.45 MAX DETAIL "X" 0.450.1 4 (0.95) (0.60) (1.20) (2.40) NOTES: 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to ASME Y14.5M-1994. 3. Dimension is exclusive of mold flash, protrusions or gate burrs. 4. Foot length is measured at reference to guage plane. 5. Package conforms to JEDEC MO-178AB. TYPICAL RECOMMENDED LAND PATTERN FN6544 Rev 3.00 September 25, 2015 Page 16 of 17 ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E Package Outline Drawing L8.2x3A 8 LEAD THIN DUAL FLAT NO-LEAD PLASTIC PACKAGE WITH E-PAD Rev 2, 05/15 0.25 0.50 2.20 6 PIN 1 INDEX AREA (4X) 6 PIN #1 INDEX AREA B 3.00 A 1.80 +0.1/ -0.15 2.00 0.15 (8x0.40) 1.65 +0.1/ -0.15 TOP VIEW BOTTOM VIEW (8x0.25) PACKAGE OUTLINE (6x0.50) 0.75 SEE DETAIL "X" SIDE VIEW 1.80 3.00 0.05 (8x0.40) 1.65 C 0.20 REF C BASE PLANE SEATING PLANE 0.08 C 5 (8x0.20) 0.05 2.00 TYPICAL RECOMMENDED LAND PATTERN DETAIL "X" NOTES: 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to ASME Y14.5m-1994. 3. Unless otherwise specified, tolerance : Decimal 0.05 4. Dimension b applies to the metallized terminal and is measured between 0.20mm and 0.32mm from the terminal tip. 5. Tiebar shown (if present) is a non-functional feature and may be located on any of the 4 sides (or ends). 6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 indentifier may be either a mold or mark feature. FN6544 Rev 3.00 September 25, 2015 Page 17 of 17