DS8838 Datasheet | National Semiconductor

Description The DS8838 is a quad high speed driver/receiver designed for use in bus organized data transmission systems interconnected by terminated 120Ω impedance lines. The external termination is intended to be 180Ω resistor from the bus to the +5V logic supply together with a 390Ω resistor from the bus to ground. The bus can be terminated at one or both ends. Low bus pin current allows up to 27 driver/receiver pairs to utilize a mon bus. The bus loading is unchanged when VCC = 0V. The receivers incorporate hysteresis to greatly enhance bus noise immunity. One two-input NOR gate is included to disable all drivers in a package simultaneously. Receiver performance is optimized for systems with bus rise and fall times ≤ 1.0 µs/V. Features n n n n n n n n n 4 totally separate driver/receiver pairs per package 1V typical receiver input hysteresis Receiver hysteresis independent of receiver output load Guaranteed minimum bus noise immunity of 1.3V, 2V typ. Temperature-insensitive receiver thresholds track bus logic levels 20 µA typical bus terminal current with normal VCC or with VCC = 0V Open collector driver output allows wire-OR connection High speed Series 74 TTL patible driver and disable inputs and receiver outputs Typical Application DS005812-1 © 1999 National Semiconductor Corporation DS005812 .national. Connection Diagram Dual-In-Line Package DS005812-2 Top View Order Number DS7838J, DS8838M or DS8838N See NS Package Number J16A, M16A or N16A .national. 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 Input and Output Voltage Storage Temperature Range Lead Temperature, (Soldering, 4 sec.) 7V 5.5V - 65˚C to +150˚C 260˚C Molded DIP Package: 1362 m W SO Package: 1002 m W Operating Conditions Operating Temperature Range Supply Voltage (VCC) 0˚C to +70˚C 4.75V ≤ VCC ≤ 5.25V Note 1: Derate...