82C55 Programmable Peripheral Interface (PPI)
Currently unavailable
No store has this product in stock right now. Prices below are the last ones we recorded.
Prices updated: 12 Oct 2026
Price history
Lowest daily price, last 90 days
Not enough price history yet.
About this product
The 82C55 is a programmable peripheral interface (PPI) IC that lets a microprocessor connect TTL-compatible I/O devices. It provides 24 programmable I/O pins organized in two 12-pin groups with three operating modes, and was historically used for keyboard and parallel printer interfaces in PCs.
Specifications
- I/O pins
- 24
- Pin groups
- Two groups of 12 pins / مجموعتان من 12 طرفاً
- Operating modes
- 3
- Logic compatibility
- TTL-compatible I/O / متوافق مع TTL
- Clock note
- Wait states needed above 8 MHz / يلزم Wait States مع تردد أعلى من 8 MHz
Frequently asked questions
Can it be used with a modern microcontroller?
It is a bus-based parallel device built for 8-bit microprocessors, so it needs address decoding and read/write control signals. Most microcontroller projects use native GPIO pins instead.
Are there timing limits I should check?
The listing notes that wait states must be inserted when used with a processor clocked above 8 MHz. Check the datasheet for the exact timing of the variant you have.
