Siemens SAB8286A 8-Bit Bi-Directional Microprocessor Driver +5V 90mA DIP-20
Siemens SAB8286A: 8-bit octal bus transceiver for microprocessors (+5V, DIP-20). Non-inverting 3-state outputs with 40% lower power supply current.
200.00 EGP
In stockSKU 3496300156009
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Siemens SAB8286A 8-Bit Bi-Directional Microprocessor Driver +5V 90mA DIP-20
The SAB 8286A is an 8-bit bipolar octal bus transceiver with high-impedance 3-state outputs, designed by Siemens using their Advanced Standard Buried Collector (ASBC) fast bipolar process. It serves as a non-inverting data bus buffer and driver engineered to interface local processor data buses directly with system data buses in high-demand microcomputer environments.
Features
- Fully Parallel 8-Bit Transceiver Architecture
- 3-State High-Impedance Outputs for Bus Sharing
- 40% Less Power Supply Current than Standard SAB 8286
- High Output Drive Capability for Driving System Data Buses
- No Output Low Noise/Glitching during 3-State Transitions
- Fully Backward Compatible with Standard SAB 8286 / SAB 8287
- Fabricated in Fast Bipolar ASBC Process
- Standard 20-Pin Plastic Dual In-Line Package (DIP-20)
Specifications
| Parameter | Symbol | Min | Max | Unit | Test Condition / Notes |
|---|---|---|---|---|---|
| Supply Voltage | VCC | 4.5 | 5.5 | V | +5V ±10% Operating Range |
| Power Supply Current | ICC | — | 90 | mA | All outputs open |
| Power Dissipation | PD | — | 1.0 | W | Absolute Maximum Rating |
| Operating Temperature Range | TA | 0 | +70 | °C | Temperature Under Bias |
| Storage Temperature | TSTG | -65 | +150 | °C | Absolute Maximum Rating |
| Output LOW Voltage (B Outputs) | VOL(B) | — | 0.45 | V | IOL = 32 mA |
| Output LOW Voltage (A Outputs) | VOL(A) | — | 0.45 | V | IOL = 16 mA |
| Output HIGH Voltage (B Outputs) | VOH(B) | 2.4 | — | V | IOH = -5 mA |
| Output HIGH Voltage (A Outputs) | VOH(A) | 2.4 | — | V | IOH = -1 mA |
| Input LOW Voltage (A Side) | VIL(A) | — | 0.8 | V | VCC = 5.0V |
| Input LOW Voltage (B Side) | VIL(B) | — | 0.9 | V | VCC = 5.0V |
| Input HIGH Voltage | VIH | 2.0 | — | V | VCC = 5.0V |
| Input Capacitance | CIN | — | 12 | pF | F = 1 MHz, VBIAS = 2.5V, TA = 25°C |
| Input to Output Delay (Non-Inverting) | tIVOV | 5 | 30 | ns | A to B or B to A propagation delay |
| Output Enable Time | tELOV | 10 | 30 | ns | OE active LOW to valid output |
| Output Disable Time | tEHOZ | 5 | 18 | ns | OE inactive HIGH to 3-state |
Pin Definitions & Functions (20-Pin DIP)
| Pin No. | Symbol | Type | Function |
|---|---|---|---|
| 1 – 8 | A0 – A7 | I/O | Local Bus Data Pins: Interface with the processor local bus depending on the state of control pin T. |
| 9 | OE | Input | Output Enable (Active LOW): Enables output drivers onto their respective bus. HIGH puts outputs into high-impedance state. |
| 10 | GND | Power | Ground: 0V reference. |
| 11 | T | Input | Transmit Control Signal: Controls data direction. HIGH: A → B. LOW: B → A. |
| 12 – 19 | B7 – B0 | I/O | System Bus Data Pins: Interface with system bus lines (Non-Inverting). Pin 12 = B7 … Pin 19 = B0. |
| 20 | VCC | Power | Power Supply: +5V power connection. |
Functional Logic / Operational Mode
| Output Enable (OE) | Transmit (T) | Data Direction / Operation |
|---|---|---|
| LOW | HIGH | Data at local bus (A0–A7) is driven onto system bus (B0–B7) |
| LOW | LOW | Data at system bus (B0–B7) is driven onto local bus (A0–A7) |
| HIGH | X (Don’t Care) | Outputs in High Impedance (3-State Isolation) |
Applications
- Microcomputer system data bus expansion and isolation
- Bidirectional interface between local processor data buses and main memory/peripheral buses
- Legacy computer maintenance, repair, and retrocomputing development
- High-capacitance bus drive systems needing low power dissipation
Package Content
- 1 x Siemens SAB8286A 8-Bit Bi-Directional Microprocessor Driver +5V 90mA DIP-20
DataSheet
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