DS8838 NSC | Alldatasheet

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Technical content

Features

n 4 totally separate driver/receiver pairs per package n 1V typical receiver input hysteresis n Receiver hysteresis independent of receiver output load n Guaranteed minimum bus noise immunity of 1.3V, 2V typ. n Temperature-insensitive receiver thresholds track bus logic levels n 20 µA typical bus terminal current with normal VCC or with VCC = 0V n Open collector driver output allows wire-OR connection n High speed n Series 74 TTL compatible driver and disable inputs and receiver outputs Typical Application DS005812-1 May 1999 DS8838 Quad Unified Bus Receiver © 1999 National Semiconductor Corporation DS005812 www.national.com

Order Number DS7838J, DS8838M or DS8838N See NS Package Number J16A, M16A or N16A www.national.com 2

Absolute Maximum Ratings(Note 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage 7V Input and Output Voltage 5.5V Storage Temperature Range −65˚C to +150˚C Lead Temperature, (Soldering, 4 sec.) 260˚C Maximum Power Dissipation (Note 1) at 25˚C Cavity Package: 1433 mW Molded DIP Package: 1362 mW Operating Conditions Operating Temperature Range 0˚C to +70˚C Supply Voltage (VCC ) 4.75V ≤ VCC ≤ 5.25V Note 1:Derate cavity package 9.6 mW/˚C above 25˚C; derate molded DIP package 10.9 mW/˚C above 25˚C; derate SO package 8.01 mW/˚C above 25˚C.Electrical Characteristics The following apply for VMIN ≤ VCC ≤ VMAX ,TMIN ≤ TA ≤ TMAX , unless otherwise specified (Notes 3, 4) Symbol Parameter Conditions Min Typ Max Units DRIVER AND DISABLE INPUTS V IH Logical “1” Input Voltage 2.0 V VIL Logical “0” Input Voltage 0.8 V II Logical “1” Input Current V IN = 5.5V 1 mA IIH Logical “1” Input Current V IN = 2.4V 40 µA IIL Logical “0” Input Current V IN = 0.4V −1.6 mA VCL Input Diode Clamp Voltage I DIS = −12 mA, IIN = −12 mA, IBUS = −12 mA, DRIVER OUTPUT/RECEIVER INPUT VOLB Low Level Bus Voltage V DIS = 0.8V, VIN = 2V, IBUS = 50 mA 0.4 0.7 V IIHB Maximum Bus Current V IN = 0.8V, VBUS = 4V, VCC = VMAX 20 100 µA IILB Maximum Bus Current V IN = 0.8V, VBUS = 4V, VCC = 0V 2 100 µA VIH High Level Receiver Threshold VIND = 0.8V, IOL = 16 mA, VCC = Max 1.80 2.25 2.50 V VIL Low Level Receiver Threshold VIND = 0.8V, VOH = −400 µA, VCC = Min 1.05 1.30 1.55 V RECEIVER OUTPUT V OH Logical “1” Output Voltage V IN = 0.8V, VBUS = 0.5V, IOH = −400 µA 2.4 V VOL Logical “0” Output Voltage V IN = 0.8V, VBUS = 4V, IOL = 16 mA 0.25 0.4 V IOS Output Short Circuit Current VDIS = 0.8V, VIN = 0.8V, VBUS = 0.5V, VOS = 0V, VCC = VMAX , (Note 5) −18 −55 mA ICC Supply Current V DIS = 0V, VIN = 2V, (Per Package) 50 70 mA tpd Propagation Delays (Note 9) Disable to Bus “1” (Note 6) 19 30 ns Disable to Bus “0” (Note 6) 15 23 ns Driver Input to Bus “1” (Note 6) 17 25 ns Driver Input to Bus “0” (Note 6) 9 15 ns Bus to Logical “1” Receiver Output (Note 7) 20 30 ns Bus to Logical “0” Receiver Output (Note 8) 18 30 ns Note 2:“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 3:Unless otherwise specified min/max limits apply across the −55˚C to +125˚C temperature range for the DS7838 and across the 0˚C to +70˚C range for the DS8838. All typical values are for TA = 25˚C and VCC = 5V. Note 4: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 5:Only one output at a time should be shorted. Note 9:These apply for VCC = 5V, TA = 25˚C unless otherwise speicified. www.national.com3

Physical Dimensionsinches (millimeters) unless otherwise noted Order Number DS8838M Molded Dual-In-Line Package (N) Order Number DS8838N www.national.com 4

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 AND GENERAL COUNSEL 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. 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 Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: sea.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 www.national.com DS8838 Quad Unified Bus Receiver 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.