DS26C31M,DS26C31T DS26C31T/DS26C31M CMOS Quad TRI-STATE Differential Line Driver Literature Number: SNLS375A DS26C31T/DS26C31M CMOS Quad TRI-STATE (R) Differential Line Driver General Description Features The DS26C31 is a quad differential line driver designed for digital data transmission over balanced lines. The DS26C31T meets all the requirements of EIA standard RS422 while retaining the low power characteristics of CMOS. The DS26C31M is compatible with EIA standard RS-422; however, one exception in test methodology is taken (Note 8). This enables the construction of serial and terminal interfaces while maintaining minimal power consumption. The DS26C31 accepts TTL or CMOS input levels and translates these to RS-422 output levels. This part uses special output circuitry that enables the drivers to power down without loading down the bus. This device has enable and disable circuitry common to all four drivers. The DS26C31 is pin compatible to the AM26LS31 and the DS26LS31. n n n n n n n n n n TTL input compatible Typical propagation delays: 6 ns Typical output skew: 0.5 ns Outputs will not load line when VCC = 0V DS26C31T meets the requirements of EIA standard RS-422 Operation from single 5V supply TRI-STATE outputs for connection to system buses Low quiescent current Available in surface mount Mil-Std-883C compliant All inputs are protected against damage due to electrostatic discharge by diodes to VCC and ground. Connection Diagrams 20-Lead Ceramic Leadless Chip Carrier (E) Dual-In-Line Package 00857401 Top View Order Number DS26C31TM or DS26C31TN See NS Package Number M16A or N16E For Complete Military Product Specifications, refer to the appropriate SMD or MDS. Order Number DS26C31ME/883, DS26C31MJ/883 or DS26C31MW/883 See NS Package Number E20A, J16A or W16A 00857412 Truth Table ENABLE ENABLE Input Non-Inverting L H X Inverting Output Output Z Z All other L L H combinations of H H L enable inputs L = Low logic state X = Irrelevant H = High logic state Z = TRI-STATE (high impedance) TRI-STATE (R) is a registered trademark of National Semiconductor Corporation. FACTTM is a trademark of National Semiconductor Corporation. (c) 2004 National Semiconductor Corporation DS008574 www.national.com DS26C31T/DS26C31M CMOS Quad TRI-STATE Differential Line Driver June 1998 DS26C31T/DS26C31M Absolute Maximum Ratings SOIC "M" Pkg. (Notes 1, 1226 mW 2) Ceramic "W" Pkg. 1182 mW If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Ceramic "E" Pkg. 2134 mW Supply Voltage (VCC) -0.5V to 7.0V DC Input Voltage (VIN) -1.5V to VCC +1.5V DC Output Voltage (VOUT) Lead Temperature (TL) (Soldering, 4 sec.) This device does not meet 2000V ESD Rating. (Note 13) Operating Conditions -0.5V to 7V Min 20 mA 150 mA Clamp Diode Current (IIK, IOK) DC Output Current, per pin (IOUT) Supply Voltage (VCC) Max Units 4.50 5.50 V DC Input or Output Voltage DC VCC or GND Current, (VIN, VOUT) 150 mA per pin (ICC) Storage Temperature Range (TSTG) 260C Max. Power Dissipation (PD) @25C (Note 3) 2419 mW Plastic "N" Pkg. 1736 mW VCC V DS26C31T -40 +85 C DS26C31M -55 +125 C 500 ns Operating Temperature Range (TA) -65C to +150C Ceramic "J" Pkg. 0 Input Rise or Fall Times (tr, tf) DC Electrical Characteristics VCC = 5V 10% (unless otherwise specified) (Note 4) Symbol Parameter VIH High Level Input Voltage VIL Low Level Input Voltage VOH High Level Output Voltage Conditions Min Typ Max 2.0 V 0.8 VIN = VIH or VIL, 2.5 Units 3.4 V V IOUT = -20 mA VOL VT |VT| - |VT | VOS |VOS - VOS | IIN ICC Low Level Output VIN = VIH or VIL, Voltage IOUT = 20 mA Differential Output RL = 100 Voltage (Note 5) Difference In RL = 100 Differential Output (Note 5) Common Mode RL = 100 Output Voltage (Note 5) 0.3 2.0 3.1 1.8 Difference In RL = 100 Common Mode Output (Note 5) Input Current VIN = VCC, GND, VIH, or VIL 0.5 V V 0.4 V 3.0 V 0.4 V 1.0 A Quiescent Supply DS26C31T VIN = VCC or GND 200 500 A Current (Note 6) IOUT = 0 A VIN = 2.4V or 0.5V 0.8 2.0 mA DS26C31M VIN = VCC or GND 200 500 A IOUT = 0 A VIN = 2.4V or 0.5V 0.8 2.1 mA 0.5 5.0 A -150 mA A (Note 6) (Note 6) IOZ TRI-STATE Output VOUT = VCC or GND Leakage Current ENABLE = VIL ENABLE = VIH ISC IOFF Output Short VIN = VCC or GND Circuit Current (Notes 5, 7) Output Leakage Current DS26C31T VOUT = 6V 100 Power Off (Note 5) VCC = 0V VOUT = -0.25V -100 A DS26C31M VOUT = 6V 100 A VCC = 0V VOUT = 0V -100 A (Note 8) www.national.com 2 -30 (Continued) Note 1: Absolute Maximum Ratings are those values 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 table of "Electrical Characteristics" provide conditions for actual device operation. Note 2: Unless otherwise specified, all voltages are referenced to ground. All currents into device pins are positive, all currents out of device pins are negative. Note 3: Ratings apply to ambient temperature at 25C. Above this temperature derate N package at 13.89 mW/C, J package 16.13 mW/C, M package 9.80 mW/C, E package 12.20 mW/C, and W package 6.75 mW/C. Note 4: Unless otherwise specified, min/max limits apply across the recommended operating temperature range. All typicals are given for VCC = 5V and TA = 25C. Note 5: See EIA Specification RS-422 for exact test conditions. Note 6: Measured per input. All other inputs at VCC or GND. Note 7: This is the current sourced when a high output is shorted to ground. Only one output at a time should be shorted. Note 8: The DS26C31M (-55C to +125C) is tested with VOUT between +6V and 0V while RS-422A condition is +6V and -0.25V. Switching Characteristics VCC = 5V 10%, tr 6 ns, tf 6 ns (Figures 1, 2, 3, 4) (Note 4) Symbol Parameter Conditions Min Typ Max Units DS26C31T CS26C31M 6 11 14 tPLH, tPHL Propagation Delays Skew (Note 9) S1 Open 0.5 2.0 3.0 ns tTLH, tTHL Differential Output Rise S1 Open 6 10 14 ns ns S1 Open 2 ns Input to Output And Fall Times tPZH Output Enable Time S1 Closed 11 19 22 tPZL Output Enable Time S1 Closed 13 21 28 ns tPHZ Output Disable Time S1 Closed 5 9 12 ns S1 Closed 7 11 14 ns (Note 10) tPLZ Output Disable Time (Note 10) CPD Power Dissipation 50 pF 6 pF Capacitance (Note 11) CIN Input Capacitance Note 9: Skew is defined as the difference in propagation delays between complementary outputs at the 50% point. Note 10: Output disable time is the delay from ENABLE or ENABLE being switched to the output transistors turning off. The actual disable times are less than indicated due to the delay added by the RC time constant of the load. Note 11: CPD determines the no load dynamic power consumption, PD = CPD VCC2 f + ICC VCC, and the no load dynamic current consumption, IS = CPD VCC f + ICC. Comparison Table of Switching Characteristics into "LS-Type" Load VCC = 5V, TA = 25C, tr 6 ns, tf 6 ns (Figures 2, 4, 5, 6) (Note 12) Symbol tPLH, tPHL Parameter Conditions Propagation Delays CL = 30 pF Input to Output S1 Closed DS26C31T DS26LS31C Units Typ Max Typ Max 6 8 10 15 ns 0.5 1.0 2.0 6.0 ns 4 6 6 9 S2 Closed Skew (Note 9) CL = 30 pF S1 Closed S2 Closed tTHL, tTLH Differential Output Rise CL = 30 pF and Fall Times S1 Closed ns S2 Closed tPLZ Output Disable Time CL = 10 pF (Note 10) S1 Closed 15 35 ns S2 Open 3 www.national.com DS26C31T/DS26C31M DC Electrical Characteristics DS26C31T/DS26C31M Comparison Table of Switching Characteristics into "LS-Type" Load (Continued) VCC = 5V, TA = 25C, tr 6 ns, tf 6 ns (Figures 2, 4, 5, 6) (Note 12) Symbol tPHZ Parameter Conditions Output Disable Time CL = 10 pF (Note 10) S1 Open DS26C31T DS26LS31C Units Typ Max Typ Max 4 7 15 25 ns 14 20 20 30 ns 11 17 20 30 ns S2 Closed tPZL Output Enable Time CL = 30 pF S1 Closed S2 Open tPZH Output Enable Time CL = 30 pF S1 Open S2 Closed Note 12: This table is provided for comparison purposes only. The values in this table for the DS26C31 reflect the performance of the device but are not tested or guaranteed. Note 13: ESD Rating: HBM (1.5 k, 100 pF) Inputs 1500V Outputs 1000V EIAJ (0, 200 pF) 350V Logic Diagram 00857402 AC Test Circuit and Switching Time Waveforms 00857403 Note: C1 = C2 = C3 = 40 pF (Including Probe and Jig Capacitance), R1 = R2 = 50, R3 = 500. FIGURE 1. AC Test Circuit www.national.com 4 DS26C31T/DS26C31M AC Test Circuit and Switching Time Waveforms (Continued) 00857404 FIGURE 2. Propagation Delays 00857405 FIGURE 3. Enable and Disable Times 00857407 Input pulse; f = 1 MHz, 50%; tr 6 ns, tf 6 ns FIGURE 4. Differential Rise and Fall Times 5 www.national.com DS26C31T/DS26C31M AC Test Circuit and Switching Time Waveforms (Continued) 00857406 FIGURE 5. Load AC Test Circuit for "LS-Type" Load 00857408 FIGURE 6. Enable and Disable Times for "LS-Type" Load Typical Applications Two-Wire Balanced System, RS-422 00857409 *RT is optional although highly recommended to reduce reflection. www.national.com 6 DS26C31T/DS26C31M Typical Performance Characteristics Differential Propagation Delay vs Temperature Differential Propagation Delay vs Power Supply Voltage 00857414 00857415 Differential Skew vs Temperature Differential Skew vs Power Supply Voltage 00857416 00857417 Differential Transition Time vs Temperature Differential Transition Time vs Power Supply Voltage 00857418 00857419 7 www.national.com DS26C31T/DS26C31M Typical Performance Characteristics (Continued) Complementary Skew vs Temperature Complementary Skew vs Power Supply Voltage 00857420 00857421 Differential Output Voltage vs Output Current Differential Output Voltage vs Output Current 00857422 00857423 Output High Voltage vs Output High Current Output High Voltage vs Output High Current 00857424 www.national.com 00857425 8 DS26C31T/DS26C31M Typical Performance Characteristics (Continued) Output Low Voltage vs Output Low Current Output Low Voltage vs Output Low Current 00857426 00857427 Supply Current vs Temperature Output Low Voltage vs Output Low Current 00857426 00857428 Output Low Voltage vs Output Low Current Supply Current vs Temperature 00857427 00857428 9 www.national.com DS26C31T/DS26C31M Typical Performance Characteristics (Continued) Supply Current vs Power Supply Voltage No Load Supply Current vs Data Rate 00857430 00857429 Loaded Supply Current vs Data Rate Output Short Circuit Current vs Temperature 00857431 00857432 Output Short Circuit Current vs Power Supply Voltage 00857433 www.national.com 10 DS26C31T/DS26C31M Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Ceramic Leadless Chip Carrier (E) Order Number DS26C31ME/883 NS Package Number E20A 16-Lead Ceramic Dual-In-Line Package (J) Order Number DS26C31MJ/883 NS Package Number J16A 11 www.national.com DS26C31T/DS26C31M Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Molded Package Small Outline (M) Order Number DS26C31TM NS Package Number M16A 16-Lead Molded Dual-In-Line Package (N) Order Number DS26C31TN NS Package Number N16E www.national.com 12 inches (millimeters) unless otherwise noted (Continued) 16-Lead Ceramic Flatpak Package (W) Order Number DS26C31MW/883 NS Package Number W16A LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ``Banned Substances'' as defined in CSP-9-111S2. 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