DS7836/DS8836 Quad NOR Unified Bus Receiver General Description Features The DS7836/DS8836 are quad 2-input receivers designed for use in bus organized data transmission systems interconnected by terminated 120X impedance lines. The external termination is intended to be 180X resistor from the bus to the a 5V logic supply together with a 390X resistor from the bus to ground. The design employs a built-in input hysteresis providing substantial noise immunity. Low input current allows up to 27 driver/receiver pairs to utilize a common bus. Performance is optimized for systems with bus rise and fall times s 1.0 ms/V. Y Y Y Y Y Y Y Low input current with normal VCC or VCC e 0V (15 mA typ) Built-in input hysteresis (1V typ) High noise immunity (2V typ) Temperature-insensitive input thresholds track bus logic levels TTL compatible output Matched, optimized noise immunity for ‘‘1’’ and ‘‘0’’ levels High speed (18 ns typ) Typical Application 120X Unified Data Bus TL/F/5810 – 1 Connection Diagram Dual-In-Line Package TL/F/5810 – 2 Top View Order Number DS7836J or DS8836N See NS Package Number J14A or N14A C1996 National Semiconductor Corporation TL/F/5810 RRD-B30M36/Printed in U. S. A. http://www.national.com DS7836/DS8836 Quad NOR Unified Bus Receiver February 1996 Absolute Maximum Ratings Operating Conditions If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage Current Voltage Storage Temperature Range Supply Voltage (VCC) DS7836 DS8836 Temperature (TA) DS7836 DS8836 7.0V 5.5V b 65§ C to a 150§ C Maximum Power Dissipation* at 25§ C Cavity Package Molded Package Lead Temperature (Soldering, 4 seconds) Min Max Units 4.5 4.75 5.5 5.25 V V b 55 a 125 a 70 §C §C 0 1308 mW 1207 mW 260 § C *Derate cavity package 8.7 mW/§ C above 25§ C; derate molded package 9.7 mW/§ C above 25§ C. Electrical Characteristics The following apply for VMIN s VCC s VMAX, TMIN s TA s TMAX, unless otherwise specified (Notes 2 and 3) Symbol VTH VIL IIN Parameter High Level Input Threshold Conditions VCC e Max Low Level Input Threshold VCC e Min Maximum Input Current VIN e 4V Min Typ Max Units DS7836 1.65 2.25 2.65 V DS8836 1.80 2.25 2.50 V DS7836 0.97 1.30 1.63 V DS8836 1.05 1.30 1.55 V VCC e Max 15 50 mA VCC e 0V 1 50 mA 0.25 0.4 V b 55 mA VOH Logical ‘‘1’’ Output Voltage VIN e 0.5V, IOUT e b400 mA 2.4 VOL Logical ‘‘0’’ Output Voltage VIN e 4V, IOUT e 16 mA V ISC Output Short Circuit Current VIN e 0.5V, VOUT e 0V, VCC e Max, (Note 4) ICC Power Supply Current VIN e 4V, (Per Package) 25 40 mA VCL Input Clamp Diode Voltage IIN e b12 mA, TA e 25§ C b1 b 1.5 V b 18 Switching Characteristics VCC e 5V, TA e 25§ C unless otherwise specified Symbol tpd Parameter Propagation Delays Conditions (Notes 4 and 5) Typ Max Input to Logical ‘‘1’’ Output Min 20 30 Units ns Input to Logical ‘‘0’’ Output 18 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 b 55§ C to a 125§ C temperature range for the DS7836 and across the 0§ C to a 70§ C range for the DS8836. All typical values are for TA e 25§ C and VCC 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: Fan-out of 10 load, CLOAD e 15 pF total, measured from VIN e 1.3V to VOUT e 1.5V, VIN e 0V to 3V pulse. Note 5: Fan-out of 10 load, CLOAD e 15 pF total, measured from VIN e 2.3V to VOUT e 1.5V, VIN e 0V to 3V pulse. http://www.national.com 2 Physical Dimensions inches (millimeters) Ceramic Dual-In-Line Package (J) Order Number DS7836J NS Package Number J14A 3 http://www.national.com DS7836/DS8836 Quad NOR Unified Bus Receiver Physical Dimensions inches (millimeters) (Continued) Molded Dual-In-Line Package (N) Order Number DS8836N NS Package Number N14A 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 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. National Semiconductor Corporation 1111 West Bardin Road Arlington, TX 76017 Tel: 1(800) 272-9959 Fax: 1(800) 737-7018 http://www.national.com 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. National Semiconductor Europe Fax: a49 (0) 180-530 85 86 Email: europe.support @ nsc.com Deutsch Tel: a49 (0) 180-530 85 85 English Tel: a49 (0) 180-532 78 32 Fran3ais Tel: a49 (0) 180-532 93 58 Italiano Tel: a49 (0) 180-534 16 80 National Semiconductor Hong Kong Ltd. 13th Floor, Straight Block, Ocean Centre, 5 Canton Rd. Tsimshatsui, Kowloon Hong Kong Tel: (852) 2737-1600 Fax: (852) 2736-9960 National Semiconductor Japan Ltd. Tel: 81-043-299-2308 Fax: 81-043-299-2408 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.