ZPSD301B-70J

Specialized Overview

The ZPSD301B-70J is a low-cost field-programmable microcontroller peripheral from the PSD3XX family, manufactured by STMicroelectronics. It integrates up to 256 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 8-bit and 16-bit microcontrollers with multiplexed or non-multiplexed buses. Key specifications include a maximum access time of 70 ns, 19 configurable I/O pins, and a 44-pin PLCC package.

Specialized 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 built-in security locks to protect the device and PAD decoding configuration.

Specialized Applications

• Telecommunications equipment such as cellular phones, digital PBXs, 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.

Specialized Procurement Notes

Verify component authenticity through authorized distributors or official manufacturer channels. Confirm the specific ordering suffix matches the required voltage range and package type. Check for obsolescence status as this part may be discontinued. Ensure compatibility with existing design constraints before procurement.

Specialized Selection Notes

Select this model for applications requiring integration of memory and programmable logic in a small form factor. Consider the ZPSD variant if lower power consumption is critical due to the Turbo bit feature. Verify bus compatibility with the target microcontroller, ensuring support for multiplexed or non-multiplexed configurations. Evaluate the need for SRAM; if unnecessary, consider the R-suffix version for cost savings.

Specialized 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 SRAM options. The ZPSD series specifically offers improved technology for reduced current consumption compared to standard PSD parts.

Specialized Replacement Considerations

Direct substitutes within the same family include other ZPSD3XX models with compatible memory sizes and pinouts. Verify package compatibility when selecting alternatives. Consult the manufacturer's selector guide for cross-referencing specific feature requirements and availability status.