The 82C84A is a high performance CMOS Clock Generator-driver designed for CMOS and NMOS microprocessors, such as the 80C86, 80C88, 8086, and 8088. It features a crystal controlled oscillator, a divide-by-three counter, and complete 'Ready' synchronization and reset logic. The chip can operate with an external frequency source from DC to 25MHz. It offers low power consumption, TTL compatible inputs/outputs, and supports crystal controlled operation up to 25MHz.
The 82C84A is a high‑performance CMOS clock generator‑driver designed for CMOS and NMOS microprocessors such as the 80C86, 80C88, 8086 and 8088. It integrates a crystal‑controlled oscillator, a divide‑by‑three counter, and full Ready synchronization and reset logic, allowing operation from DC to 25 MHz with a single 5 V supply.
The device offers TTL‑compatible inputs, very low power consumption, and multiple package options (PDIP, PLCC, CLCC, CERDIP). It includes features such as Ready synchronization, Schmitt‑trigger reset, and optional external frequency input, making it suitable for a wide range of system designs.
| Operating Voltage Range | +4.5 V to +5.5 V |
|---|---|
| Supply Voltage (Maximum) | +8.0 V |
| Input/Output Voltage Range | GND ‑0.5 V to VCC +0.5 V |
| Crystal Frequency Range | 2.4 MHz – 25 MHz |
| Maximum Power Consumption | 40 mA |
It operates from a 5 V supply with a permissible range of +4.5 V to +5.5 V.
The 82C84A supports crystal frequencies up to 25 MHz.
The CLK output provides a 33 % duty‑cycle clock signal.