SN75164B

The SN75164B eight-channel general-purpose interface bus transceiver is a monolithic, high-speed, low-power Schottky device designed to meet the requirements of IEEE Standard 488-1978. Each transceiver is designed to provide the bus-management and data-transfer signals between operating units of a multiple-controller instrumentation system. When combined with the SN75160B octal bus transceiver, the SN75164B provides the complete 16-wire interface for the IEEE-488 bus.

The SN75164B features eight driver-receiver pairs connected in a front-to-back configuration toform input/output (I/O) ports at both the bus and terminal sides. All outputs are disabled (at a high-impedance state) during VCC power-up and power-down transitions for glitch-free operation. The direction of data flow through these driver-receiver pairs is determined by the DC, TE, and SC enable signals. The SN75164B is identical to the SN75162B with the addition of an OR gate to help simplify board layouts in several popular applications. The ATN and EOI signals are ORed to pin 21, which is a standard totem-pole output.

The driver SN75164B outputs (GPIB I/O ports) feature active bus-terminating resistor circuits designed to provide a high impedance to the bus when supply voltage VCC is 0. The drivers are designed to handle loads up to 48 mA of sink current. Each receiver features pnp transistor inputs for high input impedance and an ensured hysteresis of 400 mV for increased noise immunity. All receivers have 3-state outputs to present a high impedance to the terminal when disabled.

The SN75164B is characterized for operation from 0°C to 70°C.