DS9637A_07 NSC | Alldatasheet

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Features

■ Dual channel ■ Single 5V supply ■ Satisfies EIA standards RS-422 and RS423 ■ Built-in ±35 mV hysteresis ■ High input common mode voltage range ■ High input impedance ■ TTL compatible outputs ■ Schottky technology ■ Extended temperature range Connection Diagram 8–Lead DIP and SO-8 Package 962101 Top View Order Number DS9637ACM or DS9637ACN See NS Package Number M08A or N08E For Complete Military Product Specifications, refer to the appropriate SMD or MDS. Order Number DS9637AMJ/883 See NS Package Number J08A © 2007 National Semiconductor Corporation 9621 www.national.com DS9637A Dual Differential Line Receiver

Absolute Maximum Ratings (Note 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Ceramic DIP −65°C to + 175°C Molded DIP −65°C to + 150°C Lead Temperature Ceramic DIP (Soldering, 30 seconds) 300°C Molded DIP and SO Package (Soldering, 10 seconds) 265°C Maximum Power Dissipation (Note 1) at 25°C Cavity Package 1300 mW Molded Package 930 mW VCC Lead Potential to Ground −0.5V to 7.0V Input Potential to Ground ±15V Differential Input Voltage ±15V Output Potential to Ground −0.5V to +5.5V Output Sink Current 50 mA ESD Susceptibility, HBM ≥2 kV Recommended Operating Conditions DS9637AM Min Max Units Supply Voltage (V CC) 4.5 5.5 V Operating Temperature (T A) −55 +125 °C DS9637AC Supply Voltage (V CC) 4.75 5.25 V Operating Temperature (T A) 0 +70 °C Note 1: Derate cavity package 8.7 mW/°C above 25°C; derate molded DIP package 7.5 mW/°C above 25°C; derate SO package 6.5 mW/°C above 25° Electrical Characteristics (Notes 3, 4) Over recommended operating temperature and supply voltage ranges, unless otherwise specified Symbol Parameter Conditions Min Typ Max Units VTH Differential Input −7.0V ≤ VCM ≤ +7.0V −0.2 +0.2 V Threshold Voltage (Note 6) VTH(R) Differential Input −7.0V ≤ VCM ≤ +7.0V −0.4 +0.4 V Threshold Voltage (Note 7) II Input Current VI = 10V, 0V ≤ VCC ≤ +5.5V 1.1 3.25 mA (Note 8) VI = −10V, 0V ≤ VCC ≤ +5.5V −1.6 −3.25 VOL Output Voltage LOW IOL = 20 mA, VCC = Min 0.35 0.5 V VOH Output Voltage HIGH IOH = −1.0 mA, VCC = Min 2.5 3.5 V IOS Output Short Circuit VO = 0V, VCC = Max −40 −75 −100 mA Current (Note 5) ICC Supply Current VCC = Max, VI+ = 0.5V, 35 50 mA VI− = GND VHYST Input Hysteresis VCM = ±7.0V (See Curves) 70 mV Note 2: “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 3: Unless otherwise specified Min/Max limits apply across the −55°C to +125°C temperature range for DS9637AM and across the 0°C to +70°C range for the DS9637ASC. All typicals are given for VCC = 5V and TA = 25°C. Note 4: All currents into the device pins are positive; all currents out of the device pins are negative. All voltages are referenced to ground unless otherwise specified. Note 5: Only one output at a time should be shorted. Note 6: VDIFF (Differential Input Voltage) = (VI+) − (VI−). VCM (Common Mode Input Voltage) = VI+ or VI−. Note 7: 500Ω ±1% in series with inputs. Note 8: The input not under test is tied to ground. Switching Characteristics VCC = 5.0V, TA = 25°C Symbol Parameter Conditions Min Typ Max Units tPLH Propagation Delay Time See AC Test Circuit 15 25 ns Low to High tPHL Propagation Delay Time See AC Test Circuit 13 25 ns High to Low www.national.com 2 DS9637A

FIGURE 1. Equivalent Circuit

RT ≥ 50Ω for RS-422 operation. RT combined with input impedance of receivers must be greater than 90Ω. FIGURE 4. RS-422 System Application (FIPS 1020) Differential Simplex Bus Transmission

Physical Dimensions inches (millimeters) unless otherwise noted Ceramic Dual-In-Line Package (J) Order Number DS9637AMJ/883 Molded Surface Mount Package (M) Order Number DS9637ACM www.national.com 6 DS9637A

Molded Dual-In-Line Package (N) Order Number DS9637ACN 7 www.national.com DS9637A

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