The 141 TM 80C86 CMOS 16-bit microprocessor is compatible with NMOS 8086 and features a completely static CMOS design, low power operation, and a wide operating temperature range.
This manual describes the Intersil 80C86 16‑bit CMOS microprocessor, its features, static operation, internal architecture, and memory organization. It covers the processor's ability to operate from DC up to 8 MHz, low‑power modes, and the instruction queue mechanism.
Detailed pin descriptions for both minimum and maximum mode systems are provided, along with bus operation timing, signal definitions (BHE, RD, INTR, etc.), and the functional behavior of control lines such as RESET, LOCK, and ALE. The document also includes functional diagrams and timing information for bus cycles.
| Maximum Operating Frequency | 8 MHz |
|---|---|
| Operating Temperature Range | -55 °C to +125 °C |
| Supply Voltage | +5 V |
| Maximum Power Consumption | 500 µA (max) |
BHE (Bus High Enable) selects the upper half of the data bus for transfers, allowing access to the high byte of a word.
RESET is triggered by a transition from LOW to HIGH that remains HIGH for at least four clock cycles, causing the processor to restart.
The 80C86 can operate up to 8 MHz.
The processor uses a +5 V power supply.