PSD834F2V-15J

Overview

The PSD834F2V is a Flash Programmable System Device (PSD) designed for 8-bit microcontrollers, operating on a single 3.3 V ±10% supply. It integrates 2 Mbit of primary Flash memory organized into eight uniform sectors and 256 Kbit of secondary Flash memory divided into four sectors. The device includes 64 Kbit of battery-backed SRAM and over 3,000 gates of programmable logic, comprising a Decode PLD (DPLD) and a Complex PLD (CPLD). It features 27 reconfigurable I/O ports and supports In-System Programming (ISP) via a JTAG serial interface. The component is housed in a 52-pin PLCC package.

Feature Summary

• Dual Flash Memory Architecture: 2 Mbit primary and 256 Kbit secondary Flash memories allow concurrent read/write operations for efficient In-Application Programming (IAP).
• Programmable Logic Integration: Includes a DPLD for address decoding and a CPLD with 16 output macrocells and 24 input macrocells for custom logic implementation.
• JTAG In-System Programming: Supports full-chip programming and erasing via the JTAG interface without requiring external boot ROMs or programmers.
• Power Management: Features a programmable Power Management Unit (PMU) with automatic power-down capabilities, achieving standby currents as low as 25 µA.

Applications

• Embedded systems requiring flexible memory expansion and logic integration for 8-bit MCUs.
• Applications needing concurrent code execution from secondary Flash while updating primary Flash memory.
• Designs utilizing multiplexed or non-multiplexed address/data buses with Intel, Motorola, Philips, or Zilog microcontrollers.

Procurement Notes

Verify that the specific order contains the -15J suffix to confirm the 52-PLCC package variant. Confirm the revision status, as preliminary data indicates specifications are subject to change. Ensure compatibility with 3.3 V logic levels and check for any obsolescence notices prior to final design approval.

Selection Notes

Select this component when an 8-bit MCU requires integrated Flash memory, SRAM, and programmable logic in a single package. It is suitable for designs needing up to 2 Mbit of user-accessible Flash and 64 Kbit of battery-backed RAM. Verify that the target MCU supports the required bus interface modes and that the 52-pin PLCC footprint fits the PCB layout constraints.

Part Context

The PSD834F2V belongs to STMicroelectronics' PSD family, which combines ISP Flash memory with programmable logic for 8-bit microcontroller applications. This specific model provides 2 Mbit of primary Flash and 256 Kbit of secondary Flash, distinguishing it from variants with different memory capacities or package types such as PQFP.

Replacement Considerations

Direct replacements within the PSD834F2V series include models with identical memory maps but different packages, such as the PSD834F2V-M (PQFP52). For different memory capacities, consider the PSD813F2V or PSD854F2V, ensuring pin compatibility and logic gate requirements are met.