P8254

Programmable Timers And Oscillators Overview

The P8254 is a programmable interval timer manufactured by Rochester Electronics, LLC. It features three independent 16-bit counters and supports six programmable modes of operation. The device utilizes advanced CHMOS III technology and operates with a maximum clock frequency of 8 MHz. It requires a supply voltage between 4.5 V and 5.5 V, with a nominal rating of 5 V. The component is housed in a 24-pin plastic DIP package (R-PDIP-T24) and includes an 8-bit external data bus width. It functions within a temperature range of -40 °C to 85 °C.

Programmable Timers And Oscillators Feature Summary

• Three independent 16-bit programmable counters
• Six distinct programmable operating modes
• CHMOS III technology for low power consumption
• Parallel direct address interface

Programmable Timers And Oscillators Applications

• Microcomputer timing control systems
• Industrial automation process control
• Embedded system interval generation
• General-purpose digital timing applications

Programmable Timers And Oscillators Procurement Notes

Verify the specific suffix designation, such as -2, against official documentation to confirm technical specifications. Ensure the package type matches the required footprint. Confirm the temperature grade aligns with operational requirements. Check for any specific manufacturing lot restrictions or lifecycle status updates from the manufacturer before finalizing procurement decisions.

Programmable Timers And Oscillators Selection Notes

Select this component when three independent hardware timers are required for precise interval generation. Consider the 8 MHz maximum clock speed for timing resolution needs. Verify compatibility with existing 5 V logic levels and parallel bus architectures. Ensure the industrial temperature range meets the environmental constraints of the target application design.

Programmable Timers And Oscillators Part Context

This part is a licensed reproduction of the Intel 8254 Programmable Interval Timer. Rochester Electronics provides authorized manufacturing to ensure long-term availability for legacy systems. It maintains functional equivalence with the original specification while offering modern production support. The device serves as a critical timing element in vintage and maintained microcomputer architectures.

Programmable Timers And Oscillators Replacement Considerations

The AMD Am9513 is identified as a similar programmable timer product. Verify pinout and electrical compatibility before substitution. Ensure the replacement supports the same six programmable modes and 16-bit counter architecture. Confirm that the alternative device meets the required voltage and temperature specifications.