SAB8287AP Octal Bus Transceiver 5V 90mA IC DIP-20
The SAB8287A is an 8-bit bipolar bus transceiver that provides bidirectional data transfer and bus buffering with three-state outputs and dedicated control inputs for direction and output enable. It is the inverting member of the SAB8286/SAB8287 family, so inputs on the A-side are presented inverted on the B-side (useful where logic inversion is required between subsystems). Direction is controlled by the T (TRANSMIT) input and outputs are gated by the active-LOW OE (OUTPUT ENABLE) control, allowing easy interfacing to microprocessor and system buses.
Designed for 5 V systems, the device offers robust output drive for system-level loads and supports a high-impedance (three-state) mode to allow multiple devices to share the bus without output low-glitches when entering/leaving the high-Z state. It was commonly used as a data bus buffer/driver in systems based on SAB8086/SAB80286 families and other microcomputer architectures that require reliable, bidirectional 8-bit bus interfacing.
Features:
- 8-bit bidirectional bus transceiver (octal).
- Inverting outputs (SAB8287A variant).
- Three-state outputs for bus sharing and isolation.
- Direction control (T) and active-LOW output enable (OE) pins.
- Designed as a data-bus buffer/driver for microcomputer systems.
- Low output noise when entering/leaving high-impedance state.
Specifications:
| Parameter | Details |
|---|---|
| Supply Voltage (VCC): | +5V (±10%) |
| Power Supply Current (ICC): | 90mA (all outputs open) |
| Input Clamp Voltage: | −1.0V (at −5 mA) |
| Forward Input Current: | −0.2mA |
| Reverse Input Current: | 50µA |
| Output LOW Voltage (VOL): | 0.45V |
| Output HIGH Voltage (VOH): | 2.4V (minimum) |
| Input Capacitance: | ≤ 12pF |
| Operating Temperature: | 0°C to +70°C |
| Package Type: | DIP-20 (Through-Hole) |
Pinout:
| Pin | Name | Pin | Name |
|---|---|---|---|
| 1 | A0 | 20 | VCC |
| 2 | A1 | 19 | B0 |
| 3 | A2 | 18 | B1 |
| 4 | A3 | 17 | B2 |
| 5 | A4 | 16 | B3 |
| 6 | A5 | 15 | B4 |
| 7 | A6 | 14 | B5 |
| 8 | A7 | 13 | B6 |
| 9 | OE | 12 | B7 |
| 10 | GND | 11 | T |
Applications:
- Buffering and isolating 8-bit data buses between CPU local bus and system bus.
- Bus driver for microcomputer systems (SAB8086 / SAB80286 family compatibility noted in the datasheet).
- Systems that require controlled bidirectional data transfer and bus sharing (three-state outputs).
Packages:
- 1x SAB8287AP Octal Bus Transceiver 5V 90mA IC DIP-20.
