DS7640 NSC | Alldatasheet

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Technical content

Features

Y Low input current with normal V CC or V CC e 0V (30 mA typ) Y High noise immunity (1.1V typ) Y Temperature-insensitive input thresholds track bus logic levels Y TTL compatible output Y Matched, optimized noise immunity for ‘‘1’’ and ‘‘0’’ levels Y High speed (19 ns typ) Connection Diagram Dual-In-Line Package TL/F/5805–1 Top View Order Number DS7640J or DS8640N See NS Package Number J14A or N14A Typical Application 120X Unified Data Bus TL/F/5805–2

Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage 7.0V Input Voltage 5.5V Storage Temperature Range b65§Ct o a150§C Maximum Power Dissipation * at 25 §C Cavity Package 1308 mW Molded Package 1207 mW Lead Temperature (Soldering, 4 seconds) 260 *Derate cavity package 8.7 mW/ §C above 25 §C; derate molded package 9.7 mW/ §C above 25 §C. Operating Conditions Min Max Units Supply Voltage (V CC) DS7640 4.5 5.5 V DS8640 4.75 5.25 V Temperature (T DS7640 b55 a125 §C DS8640 0 a70 §C

Electrical Characteristics

The following apply for V MIN s VCC s VMAX,T MIN s TA s TMAX, unless otherwise specified (Notes 2 and 3) Symbol Parameter Conditions Min Typ Max Units VIH High Level Input Threshold V OUT e VOL DS7640 1.80 1.50 V DS8640 1.70 1.50 V VIL Low Level Input Threshold V OUT e VOH DS7640 1.50 1.20 V DS8640 1.50 1.30 V IIH Maximum Input Current V IN e 4V V CC e VMAX 30 80 mA VCC e0V 1.0 50 mA IIL Maximum Input Current V IN e 0.4V, V CC e VMAX 1.0 50 mA VOH Output Voltage I OH eb 400 mA, V IN e VIL 2.4 V VOL Output Voltage I OL e 16 mA, V IN e VIH 0.25 0.4 V IOS Output Short Circuit Current V IN e 0.5V, V OS e 0V, V CC e VMAX, (Note 4) b18 b55 mA ICC Power Supply Current V IN e 4V, (Per Package) 25 40 mA Switching Characteristics TA e 25§C, nominal power supplies unless otherwise noted Symbol Parameter Conditions Min Typ Max Units tpd Propagation Delays (Notes 5 and 6) Input to Logic ‘‘1’’ Output 10 23 35 ns Input to Logic ‘‘0’’ Output 10 15 30 ns Note 1: ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed. Except for ‘‘Operating Temperature Range’’ they are not meant to imply that the devices should be operated at these limits. The table of ‘‘Electrical Characteristics’’ provides conditions for actual device operation. Note 2: Unless otherwise specified min/max limits apply across the b55§Ct o a125§C temperature range for the DS7640 and across the 0 §Ct o a70§C range for the DS8640. All typical values are T A e 25§C and V CC e 5V. Note 3: All currents into device pins shown as positive, out of device pins as negative, all voltages referenced to ground unless otherwise noted. All values shown as max or min on absolute value basis. Note 4: Only one output at a time should be shorted. Note 5: Fan-out of 10 load, C LOAD e 15 pF total, measured from V IN e 1.5V to V OUT e 1.5V, V IN e 0V to 3V pulse. Note 6: Apply to V CC e 5V, T A e 25§C. http:/ /www.national.com 2

Physical Dimensions inches (millimeters) Ceramic Dual-In-Line Package (J) Order Number DS7640J http:/ /www.national.com3

DS7640/DS8640 Quad NOR Unified Bus Receiver Physical Dimensions inches (millimeters) (Continued) Molded Dual-In-Line Package (N) Order Number DS8640N 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: 1. Life support devices or systems are devices or 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd. Japan Ltd.

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