PSD313B-90JI

Overview

The PSD313B-90JI is a low-cost field-programmable microcontroller peripheral from the PSD3XX family. It integrates up to 1 Mbit of UV EPROM and optional 16 Kbit SRAM with two programmable logic arrays (PAD A and PAD B). The device supports 8-bit or 16-bit microcontrollers via multiplexed or non-multiplexed bus interfaces. Key specifications include a maximum access time of 70 ns, 19 configurable I/O pins, and support for page logic to expand address space. It operates on a single 5 V supply and features programmable security and power management modes.

Feature Summary

• Integrates high-performance user-configurable blocks of EPROM, programmable logic, and optional SRAM into one part.
• Provides a powerful microcontroller interface that eliminates the need for external glue logic.
• Features two programmable logic arrays (PAD A and PAD B) replacing discrete PLDs or decoders.
• Includes built-in address latches for multiplexed address/data buses.

Applications

• Telecommunications equipment such as cellular phones and digital PBXs
• Portable industrial equipment including measurement meters and data recorders
• Medical instrumentation devices like hearing aids and monitoring equipment
• Computer peripherals for notebooks and palm-top computers

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors. Confirm package type matches design requirements. Check for RoHS compliance status if applicable. Ensure programming tools are compatible with the specific revision. Review datasheet for absolute maximum ratings before integration.

Selection Notes

Select this part for applications requiring flexible memory expansion and custom decoding logic. Compare against ZPSD variants if lower power consumption is critical. Consider the R suffix versions if SRAM is not needed to reduce cost. Verify compatibility with the target microcontroller's bus architecture using the provided configuration tables.

Part Context

This component belongs to the PSD3XX family of programmable microcontroller peripherals. It serves as a bridge between standard microcontrollers and external memory or logic resources. The family includes variations with different memory sizes and voltage ranges to suit diverse embedded control applications.

Replacement Considerations

Direct substitutes within the same family include PSD303, PSD312, and ZPSD313 variants. Check pinout compatibility and memory size requirements when selecting an alternative. Verify that the replacement supports the required bus mode and logic array configurations.