71421SA20PF8

Overview

The Renesas Electronics Corporation 71421SA20PF8 is a high-speed, asynchronous dual-port static random-access memory (SRAM) integrated circuit. It features a storage capacity of 16 kilobits organized as 2K words by 8 bits. The device supports parallel interface access with a maximum access time of 20 nanoseconds. It operates on a single 5V power supply within the voltage range of 4.5V to 5.5V. The component is housed in a 64-pin Thin Quad Flat Package (TQFP) measuring 14x14 mm and is designed for surface-mount installation. It functions within an ambient temperature range of 0°C to 70°C.

Feature Summary

• True dual-ported architecture enabling simultaneous independent access to the same memory location from two separate ports without conflict.
• Automatic power-down functionality controlled by chip enable signals to minimize standby power consumption during inactive periods.
• Battery backup capability allowing data retention at low voltages down to 2V for critical information preservation.

Applications

• High-speed data buffering in communication systems requiring concurrent read/write operations.
• Real-time processing units in industrial equipment where deterministic latency is required.
• Master-slave memory configurations in multi-bit wide data bus architectures.

Procurement Notes

Verify component authenticity through authorized channels due to potential availability of refurbished or obsolete stock. Confirm package integrity and pin alignment prior to assembly. Check for moisture sensitivity level compliance and reflow profile adherence. Ensure compatibility with existing PCB footprint designs. Validate electrical parameters against original datasheet specifications before integration into final products.

Selection Notes

Select this component when simultaneous bidirectional data transfer is necessary without external arbitration logic. Consider the 20ns access speed for timing-critical applications. Evaluate the 64-TQFP package constraints regarding board space and thermal dissipation. Assess power requirements against the 5V supply rail limitations. Compare alternative dual-port SRAMs if higher density or different voltage levels are needed.

Part Context

This part belongs to the 71421LA/SA series of dual-port RAMs manufactured by Renesas Electronics. These devices are engineered to replace discrete logic solutions in complex memory systems. The series provides a cost-effective method for expanding word width in parallel architectures while maintaining full-speed operation. They serve as essential building blocks for embedded systems requiring reliable, high-throughput memory management.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify cross-compatibility with IDT-branded equivalents such as the IDT71421SA20PF8 based on pinout and electrical specification matching. Consult manufacturer obsolescence notices for lifecycle status updates.