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DS9638QML RS-422 Dual High Speed Differential Line Driver Literature Number: SNOSB15

May 27, 2008 DS9638QML RS-422 Dual High Speed Differential Line Driver General Description The DS9638 is a Schottky, TTL compatible, dual differential line driver designed specifically to meet the EIA Standard RS-422 specifications. It is designed to provide unipolar dif- ferential drive to twisted pair or parallel wire transmission lines. The inputs are TTL compatible. The outputs are similar to totem pole TTL outputs, with active pull-up and pull-down. The device features a short circuit protected active pull-up with low output impedance and is specified to drive 50Ω trans- mission lines at high speed. The mini-DIP provides high pack- age density.

Features

■ Single 5V supply ■ Schottky technology ■ TTL and CMOS compatible inputs ■ Output short circuit protection ■ Input clamp diodes ■ Complementary outputs ■ Minimum output skew (<1.0 ns typical) ■ 50 mA output drive capability for 50Ω transmission lines ■ Meets EIA RS-422 specifications ■ Propagation delay of less than 10 ns ■ “Glitchless” differential output ■ Delay time stable with VCC and temperature variations (<2.0 ns typical) (Figure 3) ■ Extended temperature range Ordering Table NS PART NUMBER SMD PART NUMBER NS PACKAGE NUMBER PACKAGE DISCRIPTION DS9638J/883 5962–8754601PA J08A 8LD CERAMIC DIP Connection Diagram 8-Lead DIP 30059001 Top View See NS Package Number J08A © 2008 National Semiconductor Corporation 300590 www.national.com DS9638QML RS-422 Dual High Speed Differential Line Driver

Absolute Maximum Ratings (Note 1) Storage Temperature Range Ceramic DIP −65°C to +175°C Lead Temperature Ceramic DIP (Soldering, 60 sec.) 300°C Maximum Power Dissipation at 25°C (Note 2) Cavity Package 1300 mW VCC Lead Potential to Ground −5V to 7V Input Voltage −0.5V to +7V Recommended Operating Conditions DS9638J/883 Min Max Units Supply Voltage (VCC) 4.5 5.5 V Output Current HIGH (IOH ) −50 mA Output Current LOW (IOL ) 50 mA Operating Temperature (T A) −55 125 °C Quality Conformance Inspection MIL-STD-883, Method 5005 - Group A Subgroup Description Temp (°C)

1 Static tests at +25°C

2 Static tests at +125°C

3 Static tests at -55°C

4 Dynamic tests at +25°C

5 Dynamic tests at +125°C

6 Dynamic tests at -55°C

7 Functional tests at +25°C

8A Functional tests at +125°C 8B Functional tests at -55°C

9 Switching tests at +25°C

10 Switching tests at +125°C

11 Switching tests at -55°C

12 Setting time at +25°C

13 Setting time at +125°C

14 Setting time at -55°C

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DS9638J/883 Electrical Characteristics DC Parameters Over recommended operating temperature and supply voltage ranges, unless otherwise specified Symbol Parameter Conditions Notes Min Max Units Sub- Groups VOL Output Voltage Low VCC = 4.5V, FIOL = 30mA for temp, FIOL = 35mA for room (Note 3) 0.5 V 1, 2, 3 VFCD Input Clamped Voltage VCC = 4.5V, FIFCD = -18mA -1.2 V 1, 2, 3 VOHQVT VT, VT Terminated Output Voltage VCC = 5.5V, RO = 100 Ω 2 V 1, 2, 3 VOH Logical "1" Output Voltage VCC = 4.5V, FIOH = -10mA 2.5 V 1 2.0 2, 3 VOHQ Logical "1" Output Voltage VCC = 4.5V, FIOHQ = -40mA 2.0 V 1 1.0 2, 3 VOHQBAL VT- VT Output Balance VCC = 5.5V, RO = 100 Ω -0.4 0.4 V 1, 2, 3 IIL Logical "0" Input Current VCC = 5.5V, FVIIL= 0.5V -200 μA 1, 2, 3 IIH Logical "1" Input Current VCC = 5.5V, FVIIH = 2.7V 25 μA 1, 2, 3 IIHQH Logical "1" Input Current VCC = 5.5V, FVIIHQH = 5.5V 50 μA 1, 2, 3 IOS Output Short Circuit Current VCC = 5.5V, FVIOS = 0V -150 -50 mA 1 -150 -40 2, 3 ICC Supply Current VCC = 5.5V, FVCCH = 5.5V 65 mA 1 75 mA 2, 3 IOHC IO (off) Output Leakage VCC = 5.5V, FVOH = 5.5V 200 μA 1 VOS, VOS Output Offset Voltage (Note 5) 3 V 1, 2, 3 VOS- VOS Output Offset Balance (Note 4) .4 V 1, 2, 3 VIH Input High Voltage (Note 6) 2 V 1, 2, 3 VIL Input Low Voltage (Note 6) 0.5 V 1, 2, 3 VHB IX Output Leakage VCC = 0.0V, FIOHBQI = 150 μA 5.55 V 1 ICEX Output Leakage Current VCC = 0.0V, FVCEX = 5.5V 150 μA 2, 3 ICEXQI Output Leakage Current VCC = 0.0V, FVICEXQ2 = -0.25V -150 μA 2, 3 AC Parameters Over recommended operating temperature and supply voltage ranges, unless otherwise specified Symbol Parameter Conditions Notes Min Max Units Sub- Groups tPLH Propagation Delay to High Level VCC = 5V, RO = 100 Ω, CL = 15PF 20 nS 9 tPHL Propagation Delay to Low Level VCC = 5V, RO = 100 Ω, CL = 15PF 20 nS 9 tF Fall Time VCC = 5V, 90% - 10% 20 nS 9 tR Rise Time VCC = 5V, 10% - 90% 20 nS 9 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: Derate cavity package 8.7 mW/°C above 25°C. Note 3: 35mA is more stringent than 30mA. Note 4: Guaranteed by Vt- VT test. Note 5: Guaranteed by design. Note 6: Guaranteed by VOH & VOL tests. 3 www.national.com DS9638QML

FIGURE 4. Typical Delay Characteristics

Revision History

Released Revision Section Originator Changes 05/27/08 A New Release, Corporate Format, Change to DC Electrical Section Bill Petcher 1 MDS data sheet converted into one Corp. data sheet format. Change made to VOH, VOHQ and IOS. MNDS9638-X, Rev. 0AL data sheet will be Archived. www.national.com 6 DS9638QML

Physical Dimensions inches (millimeters) unless otherwise noted Ceramic Dual-In-Line Package (J) 7 www.national.com DS9638QML

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