PSD834F2-90JI

Overview

The PSD834F2-90JI is a programmable peripheral IC manufactured by STMicroelectronics, designed for integration with 8-bit microcontrollers. It is housed in a 52-pin PLCC (J-Lead) surface-mount package, measuring 19.1x19.1 mm. Classified under specialized ICs, this component functions as an interface or expansion device for embedded systems requiring configurable I/O or logic functions.

Feature Summary

• Programmable Peripheral Interface (PPI) functionality
• 52-pin PLCC (J-Lead) surface-mount package
• Designed for 8-bit MCU peripheral expansion

Applications

• 8-Bit Microcontroller system expansion
• General-purpose digital I/O interfacing
• Embedded control logic implementation

Procurement Notes

Verify the specific revision level and date code against the manufacturer's current production status. Confirm that the 52-PLCC footprint matches the target PCB design constraints. Ensure compatibility with the host 8-bit MCU's voltage levels and timing requirements before procurement.

Selection Notes

Select this component when an 8-bit MCU requires additional programmable parallel I/O or simple logic functions without consuming internal MCU resources. The 52-pin form factor suits applications where board space allows for larger packages compared to QFN or SOIC alternatives.

Part Context

This part belongs to the Programmable System Device family, historically used to offload fixed logic tasks from microprocessors. It serves as a bridge between the CPU bus and external peripherals, providing flexible configuration options through software programming.