Description

The PSD301R-12J is an electronic component model that belongs to the PSD3XX family of IC chips. It is a low-cost component that integrates high-performance and user-configurable blocks of EPROM, programmable logic, and optional SRAM into one part. The PSD3XX family of products provides 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 interface component to virtually any microcontroller. This component is available in a variety of packaging, including 44-pin PLDCC, CLDCC, TQFP, and PQFP versions.

Specifications and features

• Single-chip programmable peripheral for microcontroller-based applications
• 256K to 1 Mbit of UV EPROM with different configurable options :
• Configurable as 32, 64, or 128 K x 8; or as 16, 32, or 64 K x 16
• As fast as 70 ns access time, including address decoding
• Divided into eight equally-sized mappable blocks for optimized address mapping
• Optional 16 Kbit SRAM is configurable as 2K x 8 or 1K x 16. The access time can be as quick as 70 ns, including address decoding.
• 19 I/O pins can be individually configured for:
  • Microcontroller I/O port expansion
  • Programmable Address decoder (PAD) I/O
  • Latched address output
  • Open-drain or CMOS output
• Two Programmable Arrays (PAD A and PAD B) replace your PLD or decoder and they're capable of decoding up to 1 MB of address without paging.
• Microcontroller logic that eliminates the need for external “glue logic” and ability to interface to multiplexed and non-multiplexed buses.
• Built-in page logic expands the MCU address space by up to 16 times and programmable power management with standby current as low as 1 µA for low-voltage versions
• Track mode that allows other microcontrollers or host processors to share access to the local data bus.
• Built-in security locks the device and PAD decoding configuration
• Operating Voltage Range: V-versions: 2.7 to 5.5 volts, Others: 4.5 to 5.5 volts

Application Scenarios

The PSD301R-12J is ideal for use in several applications, including:

• Telecommunications: cellular phone, digital PBX, digital speech, FAX, and 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

Comparison

• Powerful microcontroller interface that eliminates the need for external "glue logic".
• The part's integration, small form factor and ease of use make it the ideal interface part for most microcontrollers.
• Optional built-in page logic expands the MCU address space by up to 16 times.

• The maximum voltage range for some versions of the components can be limited to 2.7 to 5.5 volts, which is lower than other types of interface components available in the market.
• The programmable logic arrays for PAD A and PAD B have a limited number of product terms compared to other models.