Product Summary

The DS7838J is a quad high speed driver/receiver designed for use in bus organized data transmission systems interconnected by terminated 120W impedance lines. The external termination of the DS7838J is intended to be 180W resistor from the bus to the +5V logic supply together with a 390W 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 common bus.

Parametrics

DS7838J absolute maximum ratings: (1)Supply Voltage: 7V; (2)Input and Output Voltage: 5.5V; (3)Storage Temperature Range: −65°C to +150°C; (4)Lead Temperature, (Soldering, 4 sec.): 260°C; (5)Maximum Power Dissipation at 25°C: Cavity Package: 1433 mW, Molded DIP Package: 1362 mW, SO Package: 1002 mW; (6)Operating Temperature Range: 0°C to +70°C; (7)Supply Voltage (VCC): 4.75V to 5.25V; (8)II Logical 1 Input Current VIN = 5.5V: 1 mA.

Features

DS7838J features: (1)4 totally separate driver/receiver pairs per package; (2)1V typical receiver input hysteresis; (3)Receiver hysteresis independent of receiver output load; (4)Guaranteed minimum bus noise immunity of 1.3V, 2V typ.; (5)Temperature-insensitive receiver thresholds track bus logic levels; (6)20 μA typical bus terminal current with normal VCC or with VCC = 0V; (7)Opecollector driver output allows wire-OR connection; (8)High speed; (9)Series 74 TTL compatible driver and disable inputs and receiver outputs.

Diagrams

DS7838J pin connection