PSD854F2-90JI

Overview

The PSD854F2-90JI is a programmable peripheral IC manufactured by STMicroelectronics, designed as an enhancement for 8-bit microcontroller systems. It integrates dual-bank flash memory, SRAM, and a reconfigurable PLD within a 52-pin Plastic Leaded Chip Carrier (PLCC) package. The device supports in-system programming and features up to 27 individually configurable I/O ports. It operates within a temperature range of -40 °C to 85 °C and utilizes a surface-mount mounting type. The component serves as a specialized interface solution for expanding MCU capabilities.

Feature Summary

• Dual-bank Flash architecture with concurrent read/erase/write operations
• Integrated Programmable Logic Device (PLD) with over 3000 gates
• Up to 27 reconfigurable I/O ports for flexible system interfacing
• Enhanced JTAG serial port for debugging and programming

Applications

• 8-Bit MCU Peripherals expansion
• General-purpose embedded control systems
• Industrial motor drive interfaces

Procurement Notes

Verify the specific suffix '90' against official STMicroelectronics documentation to confirm the exact speed grade and operating voltage parameters. Ensure the 52-PLCC package variant matches the target PCB footprint requirements. Confirm RoHS compliance status through the manufacturer's material declaration for the specific production batch.

Selection Notes

Select this component when an 8-bit MCU requires additional non-volatile storage or complex logic decoding without increasing pin count. The integrated PLD reduces external gate count. Verify that the 52-LCC (J-Lead) package dimensions fit the available board space. Compare performance metrics against the PSD813F2V series if lower capacity is sufficient.

Part Context

This part belongs to the PSD854F2V family of Flash In-System Programmable (ISP) peripherals. These devices are engineered to extend the functionality of 8-bit microcontrollers by providing onboard memory and logic resources. The family typically includes variants with different access times and memory densities, all sharing the same core architectural features and pinout compatibility.

Replacement Considerations

Direct replacements include other members of the PSD854F2V series, such as the PSD854F2VA-15JI, provided the access time specifications meet the system timing requirements. Cross-model substitution within the PSD813F2V family may be possible if reduced memory capacity is acceptable.