DS3695,DS3695T,DS3696,DS3697 DS3695/DS3695T/DS3696/DS3697 Multipoint RS485/RS422 Transceivers/Repeaters Literature Number: SNLS072B DS3695/DS3695T/DS3696/DS3697 Multipoint RS485/RS422 Transceivers/Repeaters General Description Features The DS3695, DS3696, and DS3697 are high speed differential TRI-STATE (R) bus/line transceivers/repeaters designed to meet the requirements of EIA standard RS485 with extended common mode range (+12V to -7V), for multipoint data transmission. The driver and receiver outputs feature TRI-STATE capability. The driver outputs remain in TRI-STATE over the entire common mode range of +12V to -7V. Bus faults that cause excessive power dissipation within the device trigger a thermal shutdown circuit, which forces the driver outputs into the high impedance state. The DS3696 provides an output pin TS (thermal shutdown) which reports the occurrence of the thermal shutdown of the device. This is an "open collector" pin with an internal 10 k pull-up resistor. This allows the line fault outputs of several devices to be wire OR-ed. n Meets EIA standard RS485 for multipoint bus transmission and is compatible with RS-422 n 15 ns driver propagation delays with 2 ns skew (typical) n Single +5V supply n -7V to +12V bus common mode range permits 7V ground difference between devices on the bus n Thermal shutdown protection n High impedance to bus with driver in TRI-STATE or with power off, over the entire common mode range allows the unused devices on the bus to be powered down n Combined impedance of a driver output and receiver input is less than one RS485 unit load, allowing up to 32 transceivers on the bus n 70 mV typical receiver hysteresis Both AC and DC specifications are guaranteed over the 0C to 70C temperature and 4.75V to 5.25V supply voltage range. Connection and Logic Diagrams 01040813 Top View 01040801 Top View 01040812 Top View Order Number DS3695N, DS3695TN, DS3696N, or DS3697NSee NS Package Number N08E Note 1: TS pin was LF (Line Fault) in previous datasheets and reports the occurrence of a thermal shutdown of the device. TRI-STATE (R) is a registered trademark of National Semiconductor Corporation. (c) 2004 National Semiconductor Corporation DS010408 www.national.com DS3695/DS3695T/DS3696/DS3697 Multipoint RS485/RS422 Transceivers/Repeaters May 1998 DS3695/DS3695T/DS3696/DS3697 Absolute Maximum Ratings (Note 2) Storage Temperature Range If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Lead Temperature (Soldering, 4 sec.) Supply Voltage, VCC 7V Control Input Voltages 7V Driver Input Voltage 7V Driver Output Voltages -65C to +150C 260C Recommended Operating Conditions +15V/-10V Min Max Units 4.75 5.25 V -7 +12 V Receiver Input Voltages (DS3695, DS3696) Supply Voltage, VCC +15V/-10V Bus Voltage Receiver Common Mode Voltage Operating Free Air Temp. (TA) 25V (DS3697) Receiver Output Voltage Commercial 5.5V Industrial Continuous Power Dissipation @ 25C N Package 0 +70 C -40 +85 C 1.07W (Note 4) Electrical Characteristics (Notes 3, 4) 0C TA +70C, 4.75V < VCC < 5.25V unless otherwise specified Symbol VOD1 Parameter Conditions Differential Driver Output Min Typ IO = 0 Max Units 5 V Voltage (Unloaded) VOD2 Differential Driver Output (Figure 1 ) R = 50; (RS-422) (Note 6) Voltage (with Load) VOD R = 27; (RS-485) 2 V 1.5 V Change in Magnitude of Driver Differential Output Voltage for 0.2 V 3.0 V 0.2 V 0.8 V IIN = -18 mA -1.5 V A Complementary Output States VOC |VOC| Driver Common Mode Output Voltage (Figure 1 ) R = 27 Change in Magnitude of Driver Common Mode Output Voltage for Complementary Output States VIH Input High Voltage VIL Input Low Voltage VCL Input Clamp Voltage 2 V DI, DE, RE , E, RE /DE IIL Input Low Current VIL = 0.4V -200 IIH Input High Current VIH = 2.4V 20 A IIN Input Current VCC = 0V or 5.25V VIN = 12V +1.0 mA RE /DE or DE = 0V VIN = -7V -0.8 mA 100 A +0.2 V DO/RI, DO /RI RI, RI IOZD VTH TRI-STATE Current DO, DO VCC = 0V or 5.25V, E = 0V DS3697 & DS3698 -7V < VO < +12V Differential Input Threshold -7V VCM +12V -0.2 Voltage for Receiver VTH Receiver Input Hysteresis VCM = 0V VOH Receiver Output High Voltage IOH = -400 A VOL Output Low Voltage IOL = 16 mA (Note 6) 0.5 IOL = 8 mA 0.45 V IOZR OFF-State (High Impedance) VCC = Max 20 A Output Current at Receiver 0.4V VO 2.4V Receiver Input Resistance -7V VCM +12V RO TS RIN www.national.com 70 2 mV 2.4 12 V V k (Continued) 0C TA +70C, 4.75V < VCC < 5.25V unless otherwise specified Symbol ICC Parameter Conditions Supply Current Typ Max Units No Load Driver Outputs Enabled 42 60 mA (Note 6) Driver Outputs Disabled 27 40 mA -250 mA +250 mA -85 mA IOSD Driver Short-Circuit Output Current VO = -7V (Note 6) IOSR Receiver Short-Circuit Output Current VO = 0V Min VO = +12V (Note 6) -15 Note 2: "Absolute Maximum Ratings" are those beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device should be operated at these limits. The tables of "Electrical Characteristics" provide conditions for actual device operation. Note 3: 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. Note 4: All typicals are given for VCC = 5V and TA = 25C. Note 5: Derate linearly at 11.1 mW/C to 570 mW at 70C. Note 6: All limits for which Note 5 is applied must be derated by 10% for DS3695T and DS3696T. Other parameters remain the same for this extended temperature range device (-40C TA +85C). Switching Characteristics (Notes 4, 7) 0C TA +70C, 4.75V < VCC < 5.25V unless otherwise speci- fied Receiver Switching Characteristics (Figures 2, 3, 4) Symbol Conditions Min Typ Max Units tPLH CL = 15 pF 15 25 37 ns tPHL S1 and S2 15 25 37 ns |tPLH-tPHL| Closed 0 tPLZ CL = 15 pF, S2 Open 5 12 16 ns tPHZ CL = 15 pF, S1 Open 5 12 16 ns tPZL CL = 15 pF, S2 Open 7 15 20 ns tPZH CL = 15 pF, S1 Open 7 15 20 ns ns Driver Switching Characteristics Symbol Conditions Min Typ Max Units ns SINGLE ENDED CHARACTERISTICS (Figures 5, 6, 7) tPLH RLDIFF = 60 9 15 22 tPHL CL1 = CL2 = 100 pF 9 15 22 ns 2 8 ns 7 15 30 ns tSKEW|tPLH-tPHL| tPLZ CL = 15 pF, S2 Open tPHZ CL = 15 pF, S1 Open 7 15 30 ns tPZL CL = 100 pF, S2 Open 30 35 50 ns tPZH CL = 100 pF, S1 Open 30 35 50 ns 6 10 18 ns DIFFERENTIAL CHARACTERISTICS (Figures 5, 8) t r , tf RLDIFF = 60 CL1 = CL2 = 100 pF Note 7: Switching Characteristics apply for DS3695, DS3695T, DS3696, DS3697 only. 3 www.national.com DS3695/DS3695T/DS3696/DS3697 Electrical Characteristics (Notes 3, 4) DS3695/DS3695T/DS3696/DS3697 AC Test Circuits and Switching Waveforms 01040815 FIGURE 1. Driver VOD and VOC 01040803 FIGURE 2. Receiver Propagation Delay Test Circuit 01040804 Note: Differential input voltage may be realized by grounding RI and pulsing RI between +2.5V and -2.5V. FIGURE 3. Receiver Input-to-Output Propagation Delay Timing 01040805 FIGURE 4. Receiver Enable/Disable Propagation Delay Timing www.national.com 4 DS3695/DS3695T/DS3696/DS3697 AC Test Circuits and Switching Waveforms (Continued) 01040806 Note: Unless otherwise specified the switches are closed. 01040807 FIGURE 5. Driver Propagation Delay and Transition Time Test Circuits 01040808 Note: tPLH and tPHL are measured to the respective 50% points. tSKEW is the difference between propagation delays of the complementary outputs. FIGURE 6. Driver Input-to-Output Propagation Delay Timing (Single-Ended) 01040809 FIGURE 7. Driver Enable/Disable Propagation Delay Timing 5 www.national.com DS3695/DS3695T/DS3696/DS3697 AC Test Circuits and Switching Waveforms (Continued) 01040810 FIGURE 8. Driver Differential Transition Timing Function Tables DS3695/DS3696 Transmitting Inputs RE Thermal DE DI Outputs Shutdown DO DO TS * (DS3696 Only) X 1 1 OFF 0 1 H X 1 0 OFF 1 0 H X 0 X OFF Z Z H X 1 X ON Z Z L DS3695/DS3696 Receiving Inputs Outputs RE DE RI-RI RO 0 0 +0.2V 1 0 0 -0.2V 0 H 1 0 X Z H TS * (DS3696 Only) H DS3697 Inputs E RI-RI Thermal Shutdown Outputs DO DO RO (DS3697 Only) 1 +0.2V OFF 0 1 1 -0.2V OFF 1 0 0 0 X OFF Z Z Z 1 +0.2V ON Z Z 1 1 -0.2V ON Z Z 0 1 X -- Don't care condition Z -- High impedance state *TS is an "open collector" output with an on-chip 10 k pull-up resistor that reports the occurrence of a thermal shutdown of the device. www.national.com 6 DS3695/DS3695T/DS3696/DS3697 Typical Application 01040811 Note: Repeater control logic not shown, see AN-702. Typical Performance Characteristics Driver VOH vs IOH vs Temperature Driver VOH vs IOH vs VCCDriver VOH vs IOH vs VCC 01040819 01040820 Driver VOL vs IOL vs Temperature Driver VOH vs IOH vs VCC 01040821 01040822 7 www.national.com DS3695/DS3695T/DS3696/DS3697 Typical Performance Characteristics (Continued) Driver Differential Propagation Delay vs Temperature Driver Differential Propagation Delay vs VCC 01040823 01040824 Driver Single-Ended Propagation Delay vs Temperature Driver Single-Ended Propagation Delay vs VCC 01040825 01040826 Driver Transition Time vs Temperature Driver Transition Time vs VCC 01040827 www.national.com 01040828 8 DS3695/DS3695T/DS3696/DS3697 Typical Performance Characteristics (Continued) Supply Current vs Temperature Cable Length vs Data Rate 01040829 01040830 Supply Current vs Power Supply Voltage Driver ICC vs Switching Frequency 01040832 01040831 Driver Short Circuit Current vs Temperature Receiver VOH vs IOH vs Temperature 01040834 01040833 9 www.national.com DS3695/DS3695T/DS3696/DS3697 Typical Performance Characteristics (Continued) Driver Short Circuit Current vs Temperature Receiver VOH vs IOH vs VCC 01040835 01040833 Receiver VOH vs IOH vs VCC Receiver VOH vs IOH vs Temperature 01040835 01040834 Receiver VOL vs IOL vs VCC Receiver VOL vs IOL vs Temperature 01040836 www.national.com 01040837 10 DS3695/DS3695T/DS3696/DS3697 Typical Performance Characteristics (Continued) Receiver Differential Propagation Delay vs Temperature Receiver Differential Propagation Delay vs VCC 01040838 01040839 Receiver Short Circuit Current vs Temperature Receiver Short Circuit Current vs Power Supply 01040840 01040841 Receiver Non-Inverting Input Current vs Temperature Receiver Non-Inverting Input Current vs Power Supply Voltage 01040842 01040843 11 www.national.com DS3695/DS3695T/DS3696/DS3697 Typical Performance Characteristics (Continued) Receiver Inverting Input Current vs Temperature Receiver Inverting Input Current vs Power Supply Voltage 01040844 01040845 Hysteresis and Differential Transition Voltage vs Temperature Hysteresis and Differential Transition Voltage vs VCC 01040846 www.national.com 01040847 12 inches (millimeters) unless otherwise noted 8-Lead Molded Dual-In-Line Package (N) Order Number DS3695N, DS3696N, DS3697N, or DS3695TN NS Package Number N08E National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. 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