ZPSD302B-90JI

Overview

The ZPSD302B-90JI is a field-programmable microcontroller peripheral from the PSD3XX family, integrating high-performance user-configurable blocks of EPROM, programmable logic, and optional SRAM into one part. It provides a powerful microcontroller interface that eliminates the need for external glue logic. The device features up to 512 Kbit of UV EPROM and optional 16 Kbit SRAM. It includes two programmable logic arrays (PAD A and PAD B) with up to 18 inputs and 24 outputs, supporting up to 40 product terms. The device supports single supply voltage operation at 5 V ±10% and offers access times as fast as 70 ns.

Feature Summary

• Integrates up to 512 Kbit of UV EPROM and optional 16 Kbit SRAM for expanded memory capabilities.
• Features two programmable logic arrays (PAD A and PAD B) to replace discrete PLDs or decoders.
• Includes programmable I/O ports and input latches for flexible system interfacing.
• Supports page logic to expand the microcontroller address space by up to 16 times.

Applications

• Telecommunications equipment such as cellular phones and digital PBX systems
• Portable industrial equipment including measurement meters and data recorders
• Medical instrumentation devices like hearing aids and diagnostic tools

Procurement Notes

Verify component status as the PSD3XX family may be classified as obsolete. Confirm specific ordering suffixes against official documentation to ensure correct package type and electrical characteristics. Cross-reference datasheet revision history for any updates to pin assignments or timing parameters before finalizing procurement plans.

Selection Notes

Select this component when designing embedded control applications requiring integrated programmable peripherals. Choose based on required EPROM size, bus width compatibility, and power consumption needs. Ensure the selected variant matches the target microcontroller's bus architecture, whether multiplexed or non-multiplexed, and verify package availability for the intended form factor.

Part Context

This part belongs to the PSD3XX family of low-cost field-programmable microcontroller peripherals. The family integrates EPROM, programmable logic, and optional SRAM to eliminate external glue logic. Variants include standard, RAM-less, low-power, and low-voltage versions to suit different application requirements.

Replacement Considerations

Consult the official selector guide for direct functional equivalents within the PSD3XX family. Consider variants with matching memory sizes and logic capacities. Verify pin compatibility and electrical specifications before substituting with other manufacturers' programmable peripherals.