DS9636A RS-423 Dual Programmable Slew Rate Line Driver General Description The DS9636A is a TTL/CMOS compatible, dual, single ended line driver which has been specifically designed to satisfy the requirements of EIA Standard RS-423. The DS9636A is suitable for use in digital data transmission systems where signal wave shaping is desired. The output slew rates are jointly controlled by a single external resistor connected between the wave shaping control lead (WS) and ground. This eliminates any need for external filtering of the output signals. Output voltage levels and slew rates are independent of power supply variations. Current-limiting is provided in both output states. The DS9636A is designed for nominal power supplies of ± 12V. Inputs are TTL compatible with input current loading low enough (1/10 UL) to be also compatible with CMOS logic. Clamp diodes are provided on the inputs to limit transients below ground. Features n n n n n Programmable slew rate limiting Meets EIA Standard RS-423 Commercial or extended temperature range Output short circuit protection TTL and CMOS compatible inputs Connection Diagram 8-Lead DIP DS009620-1 Top View Order Number DS9636ACN, See NS Package Number N08E For Complete Military Product Specifications, refer to the appropriate SMD or MDS. Order Number DS9636AJ/883 See NS Package Number J08A © 1998 National Semiconductor Corporation DS009620 www.national.com DS9636A RS-423 Dual Programmable Slew Rate Line Driver May 1998 Absolute Maximum Ratings (Note 1) Maximum Power Dissipation* at 25˚C (Note 5) Cavity Package 1560 mW Molded Package 1300 mW V+ Lead Potential to Ground Lead V− to +15V V− Lead Potential to Ground Lead +0.5V to −15V V+ Lead Potential to V− Lead 0V to +30V ± 15V Output Potential to Ground Lead Output Source Current −150 mA Output Sink Current 150 mA If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Ceramic DIP Molded DIP Lead Temperature Ceramic DIP (Soldering, 60 seconds) Molded DIP (Soldering, 10 seconds) −65˚C to +175˚C −65˚C to +150˚C 300˚C 265˚C Recommended Operating Conditions Characteristics DS9636AM Min DS9636AC Typ Max Min Typ Units Max Positive Supply Voltage (V+) 10.8 12 13.2 10.8 12 13.2 V Negative Supply Voltage (V−) −13.2 −12 −10.8 −13.2 −12 −10.8 V −55 25 125 0 25 500 10 Operating Temperature (T A) Wave Shaping Resistance (R WS) 10 70 ˚C 1000 kΩ Electrical Characteristics (Notes 2, 3) Over recommended operating temperature, supply voltage and wave shaping resistance ranges unless otherwise specified Symbol VOH1 Parameter Output Voltage HIGH VOH2 VOH3 VOL1 Output Voltage LOW VOL2 VOL3 Conditions RL to GND (RL = ∞) RL to GND (RL = 3.0 kΩ) RL to GND (RL = 450Ω) Min Typ Max Units 5.0 5.6 6.0 V 5.0 5.6 6.0 V 4.0 5.5 6.0 V RL to GND (RL = ∞) RL to GND (RL = 3.0 kΩ) RL to GND (RL = 450Ω) −6.0 −5.7 −5.0 V −6.0 −5.6 −5.0 V −6.0 −5.4 −4.0 V RO Output Resistance 50 Ω Output Short Circuit Current (Note 4) 450Ω ≤ RL VO = 0V, VI = 0V VO = 0V, VI = 2.0V 25 IOS+ −150 −60 −15 mA 15 60 150 mA ICEX Output Leakage Current VO = ± 6.0V, Power-Off −100 +100 µA VIH Input Voltage HIGH VIL Input Voltage LOW VIC Input Clamp Diode Voltage IOS− IIL Input Current LOW IIH Input Current HIGH I+ Positive Supply Current I− Negative Supply Current 2.0 V 0.8 II = 15 mA VI = 0.4V −1.5 −1.1 −80 −16 VI = 2.4V VI = 5.5V VCC = ± 12V, RL = ∞, RWS = 100 kΩ, VI = 0V VCC = ± 12V, RL = ∞, RWS = 100 kΩ, VI = 0V −18 V 1.0 10 10 100 13 18 −13 V V µA mA mA 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 devices should be operated at these limits. The tables of “Electrical Characteristics” provide conditions for actual device operation. Note 2: Unless otherwise specified Min/Max limits apply across the −55˚C to +125˚C temperature range for the DS9636AM and across the 0˚C to +70˚C range for the DS9636AC. All typicals are given for V CC = 5V and TA = 25˚C. Note 3: All currents into the device pins are positive; all currents out of the device pins are negative. All voltages are reference to ground unless otherwise specified. Note 4: Only one output at a time should be shorted. Note 5: Ratings apply to ambient temperature at 25˚C. Above this temperature, derate J and N packages 10.4 mW/˚C. www.national.com 2 Switching Characteristics VCC = ± 12V ± 10%, TA = 25˚C, see AC Test Circuit Symbol tr tf Parameter Rise Time Fall Time Condition RWS = 10 kΩ RWS = 100 kΩ Min Typ Max 0.8 1.1 1.4 8.0 11 14 RWS = 500 kΩ RWS = 1000 kΩ RWS = 10 kΩ 40 55 70 RWS = 100 kΩ RWS = 500 kΩ RWS = 1000 kΩ Units µs 80 110 140 0.8 1.1 1.4 8.0 11 14 40 55 70 80 110 140 µs Typical Performance Characteristics Input/Output Transfer Characteristic vs Temperature Input Current vs Input Voltage Output Current vs Output Voltage (Power On) DS009620-7 Output Current vs Output Voltage (Power Off) DS009620-8 Supply Current vs Temperature DS009620-9 Transition Time vs RWS DS009620-11 DS009620-10 DS009620-12 DS009620-5 DS009620-4 CL includes jig and probe capacitance VI Amplitude: 3.0V Offset: 0V Pulse Width: 500 µs PRR: 1.0 kHz tr = tf ≤ 10 ns FIGURE 1. AC Test Circuit and Waveforms 3 www.national.com Typical Performance Characteristics (Continued) DS009620-6 FIGURE 2. RS-423 System Application www.national.com 4 Physical Dimensions inches (millimeters) unless otherwise noted Ceramic Dual-In-Line Package (J) Order Number DS9636AJ/883 NS Package Number J08A Molded Dual-In-Line Package (N) Order Number DS9636ACN NS Package Number N08E 5 www.national.com DS9636A RS-423 Dual Programmable Slew Rate Line Driver 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 OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support 1. 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