PSD813F2A-90J

Overview

The PSD813F2A-90J is a Flash in-system programmable (ISP) peripheral IC designed for 8-bit microcontrollers. Manufactured by STMicroelectronics, it integrates dual-bank Flash memory, up to 256 Kbit SRAM, and over 3000 gates of PLD logic within a single chip. The device features 27 reconfigurable I/O ports and an enhanced JTAG serial port for full-chip in-system programming. It operates with a maximum supply voltage of 5.5 V and is housed in a 52-pin Plastic Leaded Chip Carrier (PLCC) package measuring 19.1 x 19.1 mm.

Feature Summary

• Dual-bank Flash memory architecture allowing concurrent read/erase/write operations between primary and secondary banks.
• Integrated Programmable Logic Device (PLD) with over 3000 gates, supporting CPLD and DPLD configurations.
• Built-in JTAG-compliant serial port enabling full-chip In-System Programmability (ISP).
• 27 individually configurable I/O ports that can serve as MCU I/Os, PLD I/Os, or latched address outputs.

Applications

• Embedded designs requiring integrated Flash memory and programmable logic for 8-bit MCUs.
• Systems needing flexible address space expansion via the internal page register.
• Applications utilizing low-cost FlashLINK cables for manufacturing testing and programming.

Procurement Notes

Verify the specific suffix 'J' corresponds to the 52-PLCC package variant when sourcing. Confirm RoHS compliance status through official STMicroelectronics documentation, as packaging materials may vary by production batch. Ensure the ordering code matches the exact speed grade required for the target application timing constraints.

Selection Notes

Select this component when an 8-bit MCU requires external Flash memory, SRAM, and complex glue logic consolidation into a single package. The dual-bank Flash allows background data logging while executing code from the other bank. Consider the 27 reconfigurable I/Os if the design demands flexible pin mapping for address latching or special function outputs.

Part Context

This part belongs to the PSD8XXFX family of memory systems for microcontrollers. It combines peripheral functions typically found in separate chips, such as Flash, SRAM, and PLD, into one unit. This integration simplifies board layout and reduces component count compared to discrete solutions for embedded applications.

Replacement Considerations

Check for variants within the PSD813F2A series with different speed grades or package options. Verify compatibility with existing PCB footprints if substituting with leaded vs. leadless packages. Ensure the replacement supports the same JTAG interface for ISP functionality.