7140SA35PDG

Overview

The Renesas 7140SA35PDG is an asynchronous dual-port static random-access memory (SRAM) integrated circuit with an 8K-bit storage capacity organized as 1K x 8. It features a parallel interface and supports simultaneous independent access to the same memory location from two separate ports. The device operates within a supply voltage range of 4.5V to 5.5V and offers a maximum access time of 35 nanoseconds. It is housed in a 48-pin small outline dual in-line package (SOPDIP) designed for surface-mount or through-hole applications.

Feature Summary

• True dual-port architecture enabling simultaneous read/write operations from two independent ports without bus contention
• Asynchronous operation allowing flexible timing control for both port interfaces
• TTL-compatible input and output levels simplifying integration with standard logic families
• On-chip hardware support for semaphore signaling and interrupt flags to manage data integrity

Applications

• High-speed data buffering in telecommunications equipment
• Cache memory implementation in embedded processing systems
• Data acquisition systems requiring concurrent host and peripheral access
• Industrial control units needing reliable volatile storage

Procurement Notes

Verify component authenticity through authorized distributors due to end-of-life status. Confirm package variant matches design requirements, as pinouts may differ across SOPDIP and PLCC formats. Check RoHS compliance documentation for specific manufacturing lots. Ensure replacement components maintain identical electrical characteristics and mechanical dimensions for direct board compatibility.

Selection Notes

Select this component when true dual-port functionality is required for concurrent data handling. The 35ns speed suits moderate-frequency asynchronous interfaces. Consider the 48-pin DIP form factor for prototyping or legacy socket compatibility. Evaluate power consumption against system thermal constraints, noting that standby modes depend on chip enable signals. Verify temperature range meets operational environment specifications.

Part Context

This part belongs to the Renesas 7140SA series of dual-port SRAMs, which provides scalable memory solutions for multi-processor architectures. The series typically includes variants with different access speeds and packaging options. These devices are engineered for applications demanding high bandwidth and low latency between independent bus masters.

Replacement Considerations

Public confirmed substitute part numbers: None available.