TP82C54

Overview

The TP82C54 is a programmable interval timer manufactured by Rochester Electronics, LLC. It utilizes advanced CHMOS III technology and features three independent 16-bit counters. The device supports six programmable modes for flexible timing operations. It operates with a maximum clock frequency of 8 MHz and accepts an 8-bit parallel data bus via direct addressing. The component is housed in a 24-pin DIP package (R-PDIP-T24) with plastic/epoxy material. Electrical specifications include a nominal supply voltage of 5 V, ranging from 4.5 V to 5.5 V, with a maximum power consumption of 10 mA. The operating temperature range spans from -40 °C to 85 °C.

Feature Summary

• Three independent 16-bit counter channels for complex timing applications
• Six distinct programmable operating modes for versatile signal generation
• Direct address interface supporting 8-bit parallel data transfer

Applications

• Industrial control systems requiring precise time intervals
• Embedded controller timing logic
• General-purpose digital circuit synchronization

Procurement Notes

Verify the specific suffix designation when ordering, as it may indicate variations in temperature rating or packaging configuration. Confirm that the 24-pin DIP form factor aligns with existing board layouts. Ensure the 8 MHz maximum clock speed meets system requirements. Validate compatibility with 5 V logic levels and check for any specific handling instructions related to CHMOS III technology during assembly.

Selection Notes

Select this component when a robust, industrial-grade programmable timer is required with wide temperature tolerance. The 24-pin DIP package suits through-hole designs. Consider the 8 MHz limit for high-speed applications. Verify that the three-channel architecture fits the design complexity. This part serves as a compatible alternative to legacy Intel 8254 designs within the specified electrical constraints.

Part Context

This device belongs to the family of programmable interval timers, functionally equivalent to the Intel 8254. Rochester Electronics provides this component as a continuous source for legacy and discontinued semiconductor parts. It is designed for integration into embedded processors and controllers where reliable hardware-based timing is essential for system operation and data processing synchronization.

Replacement Considerations

Compatible substitutes include the Intel 8253 and AMD Am9513. Verify pinout compatibility and electrical parameters before substitution. Ensure the replacement part supports the same six programmable modes and 16-bit counter width.