The 82C89 is a CMOS bus arbiter from Intersil with low power consumption and four operating modes.
This document describes the Intersil 82C89 CMOS Bus Arbiter, a multi‑master system bus controller compatible with 80C86/8086 and 80C88/8088 processors. It details features such as pin compatibility with the bipolar 8289, four operating modes, and high‑current drive capability.
The datasheet includes functional diagrams, pin‑out tables, detailed pin descriptions, arbitration techniques, and mechanical specifications such as package options, temperature ranges, and die characteristics. Ordering information and handling cautions are also provided.
| Supply Voltage (VCC) | +5 V |
|---|---|
| Die Dimensions | 92.9 × 95.7 × 19 µm |
| Metallization Thickness | 11 kÅ + 2 kÅ |
| Worst Case Current Density | 1.8 × 10⁰ A/cm² |
The device supports four operating modes for flexible system configuration.
All devices are sensitive to electrostatic discharge; proper IC handling procedures must be followed.
A 0.1 µF capacitor between pins 10 and 20 is recommended for decoupling.