71421LA25PF8

Overview

The Renesas Electronics Corporation 71421LA25PF8 is a high-speed, asynchronous dual-port static random access memory (SRAM) with a storage capacity of 16 kilobits. The device features a memory organization of 2K words by 8 bits and utilizes a parallel interface for data transfer. It supports a single 5V power supply operating within a voltage range of 4.5V to 5.5V. The component offers an access time of 25 nanoseconds and a write cycle time of 25 nanoseconds. It is housed in a 64-lead Thin Quad Flatpack (TQFP) package measuring 14x14 mm, designed for surface mount installation. The operational temperature range extends from 0°C to 70°C.

Feature Summary

• True dual-port architecture enabling simultaneous independent access to the same memory location by two separate processors without external arbitration logic.
• Automatic power-down functionality controlled by chip enable signals, allowing on-chip circuitry to enter a low standby power mode when inactive.
• Battery backup capability supporting data retention at voltages as low as 2V, ensuring data integrity during main power loss.

Applications

• High-speed data buffering in communication systems requiring full-speed error-free operation between master and slave devices.
• Cache memory implementation in embedded processing systems needing rapid read/write cycles.
• Data logging applications utilizing battery backup features for critical information preservation.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential availability issues. Confirm RoHS compliance status, as specific variants may differ. Check for end-of-life notices or obsolescence warnings before finalizing procurement plans. Ensure packaging specifications match production requirements. Validate that the 64-TQFP footprint aligns with existing PCB designs.

Selection Notes

Select this component for applications requiring true dual-port memory capabilities with 25ns speed performance. Consider the 5V supply requirement and 64-pin TQFP package constraints. Evaluate thermal management needs for the 0°C to 70°C operating range. Compare against other 16Kb dual-port SRAM options if different voltage levels or package sizes are required. Assess system compatibility with asynchronous parallel interfaces.

Part Context

This part belongs to the 7142 series of dual-port RAMs manufactured by Renesas Electronics. The series includes variations such as the 71321LA and 71421LA models, which share similar architectural features but may differ in speed grades or pin configurations. These components are designed to function as slave devices alongside master dual-port RAMs in wider word width systems.

Replacement Considerations

IDT71421LA25PF8 is a confirmed substitute part number for this component. Verify pinout compatibility and electrical specifications before substitution. Other members of the 7142 family may serve as alternatives depending on specific speed or package requirements.