This document introduces the Intersil brand's 82C55A CMOS Programmable Peripheral Interface device. The device features 24 programmable I/O pins and can be used with various microprocessors. It is manufactured using a high-performance CMOS process, providing low power consumption and high-speed operation.
The 82C55A is a high‑performance CMOS programmable peripheral interface compatible with the industry‑standard 8255A. It offers 24 programmable I/O pins, full TTL compatibility, low standby power (0.10 µA), and up to 8 MHz operation with 80C86/80C88 CPUs. The device is RoHS‑compliant and available in Pb‑free versions.
The document includes detailed pinouts for PDIP, CERDIP, PLCC, and MQFP packages, functional block diagrams, description of control logic, and the three operating modes (basic I/O, strobed I/O, bidirectional bus). Package dimensions, ordering numbers, and mechanical drawings are also provided.
| Programmable I/O pins | 24 |
|---|---|
| Standby power (ICCSB) | 0.10 µA |
| Drive capability per I/O port | 2.5 mA |
| TTL compatibility | Full |
| RoHS compliance | Pb‑Free |
| Operating temperature range | -40 °C to 85 °C |
The 82C55A provides 24 programmable I/O pins.
The standby power (ICCSB) is 0.10 µA.
Yes, the 82C55A is fully TTL compatible.