ZPSD302B-70J

Overview

The ZPSD302B-70J is a low-cost field-programmable microcontroller peripheral from the PSD3XX family, manufactured by STMicroelectronics. It integrates up to 512 Kbit of UV EPROM and optional 16 Kbit SRAM into a single chip. The device features two programmable logic arrays (PAD A and PAD B) for address decoding and control logic, eliminating external glue logic. It supports 5 V single-supply operation with access times as fast as 70 ns. The component includes programmable I/O ports, input latches, page logic for address space expansion, and security features. It is available in a 44-pin PLDCC package.

Feature Summary

• Integrates high-performance user-configurable blocks of EPROM, programmable logic, and optional SRAM.
• Provides powerful microcontroller interface capabilities that eliminate the need for external discrete glue logic.
• Features two programmable logic arrays capable of decoding up to 1 MB of address without paging.
• Includes built-in security mechanisms to lock the device and PAD decoding configuration.

Applications

• Telecommunications equipment such as cellular phones, digital PBX, and FAX machines.
• Portable industrial equipment including industrial control systems and measurement meters.
• Medical instrumentation devices like hearing aids and diagnostic tools.
• Computer peripherals for notebooks, portable PCs, and palm-top computers.

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and voltage range. Confirm current availability status as this product line may be discontinued or obsolete. Ensure compatibility with the target microcontroller's bus architecture before procurement.

Selection Notes

Select this part for applications requiring integration of memory and programmable logic in a small form factor. Choose based on required EPROM size and whether SRAM is needed. Verify the operating voltage range matches the system design, noting that standard versions require 5 V supply.

Part Context

This component belongs to the PSD3XX family of low-cost field-programmable microcontroller peripherals. The family includes variants with different memory sizes, voltage ranges, and power management features. The ZPSD variant specifically offers improved technology for reduced current consumption.

Replacement Considerations

Consult the manufacturer's selector guide for direct replacements within the PSD3XX family. Consider ZPSD302B-70U or similar variants if package differences exist. Verify pinout and electrical specifications match the original design requirements.