7140SA25PF

Overview

The 7140SA25PF is an asynchronous dual-port static random-access memory (SRAM) manufactured by Renesas Electronics Corporation. It provides a storage capacity of 8 kilobits, organized as 1K words by 8 bits. The device features parallel interface access with a maximum access time of 25 nanoseconds. It operates within a supply voltage range of 4.5V to 5.5V and supports surface-mount installation in a 64-TQFP package measuring 14x14 mm. The component is designed for commercial temperature ranges from 0°C to 70°C.

Feature Summary

• Dual-port architecture enabling independent simultaneous access to the same memory array by two separate processors or systems without conflict.
• Automatic power-down functionality controlled by chip enable signals, allowing on-chip circuitry to enter low standby power modes when inactive.

Applications

• High-speed data buffering between asynchronous logic blocks
• Cache memory implementation in embedded processing systems
• FIFO buffer applications requiring concurrent read/write operations

Procurement Notes

Verify RoHS compliance status carefully, as specific variants may not meet current environmental directives. Confirm package integrity upon receipt, as lead-free options differ physically from legacy versions. Check for obsolescence notices, as this part number indicates end-of-life status in official channels. Ensure supplier documentation matches the exact suffix to confirm pinout and electrical specifications.

Selection Notes

Select this component when independent concurrent access to shared memory is required without external arbitration logic. The 25ns speed suits moderate-frequency digital signal processing tasks. Verify that the 64-TQFP footprint aligns with existing PCB layouts. Consider thermal dissipation requirements within the commercial temperature range during system design.

Part Context

This device belongs to the IDT7140SA family of dual-port SRAMs. It serves as a bridge component in mixed-signal systems where data isolation between domains is critical. The asynchronous nature allows integration with various clock domains without synchronization overhead.

Replacement Considerations

Official substitutes include the 7140SA25J8 and 7140SA25G. Verify package compatibility before substitution, as J8 uses PLCC and G uses through-hole packaging. Electrical parameters remain consistent across these variants.