ZPSD303B-70J

Overview

The ZPSD303B-70J is a low-cost field-programmable microcontroller peripheral from the PSD3XX family, manufactured by STMicroelectronics. It integrates up to 1 Mbit 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 programmable security features. It is designed to interface with various 8-bit and 16-bit microcontrollers.

Feature Summary

• Integrates high-performance user-configurable blocks of EPROM, programmable logic, and optional SRAM.
• 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 programmable power management capabilities with standby current reduction options.

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 'J' against official documentation to confirm package type, as datasheets may list multiple package options for the base part number. Confirm availability status, as this product line may be classified as obsolete. Ensure compatibility with existing design requirements before procurement.

Selection Notes

Select this component when interfacing with 8-bit or 16-bit microcontrollers requiring expanded address space and integrated memory. Consider the ZPSD variant if lower power consumption is critical due to its Turbo bit feature. Evaluate the need for optional SRAM; if not required, an 'R' version might offer cost savings. Ensure the 5V operating voltage matches the system design.

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 replace discrete components. The ZPSD303B-70J specifically denotes the 1 Mbit EPROM capacity within the ZPSD sub-family, which offers improved power management features compared to standard PSD versions.

Replacement Considerations

Direct replacements include other members of the PSD3XX family such as ZPSD302B-70J or ZPSD313B-70J, depending on memory size and bus width requirements. Verify pinout compatibility and software configuration via PSDsoft when substituting parts within the same family.