Introduction
The low cost PSD3XX family integrates high-performance and user-configurable blocks of EPROM, programmable logic, and optional SRAM into one part. The PSD3XX products also provide a powerful microcontroller interface that eliminates the need for external “glue logic”. The part’s integration, small form factor, low power consumption, and ease of use make it the ideal part for interfacing to virtually any microcontroller.

FEATURES SUMMARY
■ Single Supply Voltage:
   – 5 V±10% for PSD3xx, ZPSD3xx, PSD3xxR, ZPSD3xxR
   – 2.7 to 5.5 V for ZPSD3xxV, ZPSD3xxRV
■ Up to 1 Mbit of EPROM
■ Up to 16 Kbit SRAM
■ Input Latches
■ Programmable I/O ports
■ Page Logic
■ Programmable Security

Applications
❏ Telecommunications:
   • Cellular phone
   • Digital PBX
   • Digital speech
   • FAX
   • Digital Signal Processing (DSP)
❏ Portable Industrial Equipment:
   • Industrial control
   • Measurement meters
   • Data recorders
❏ Instrumentation
❏ Medical Instrumentation:
   • Hearing aids
   • Monitoring equipment
   • Diagnostic tools
❏ Computers—notebooks, portable PCs, and palm-top computers:
   • Peripheral control (fixed disks, laser printers, etc.)
   • Modem Interface
   • MCU peripheral interface