7134LA45CB

Overview

The Renesas Electronics Corporation 7134LA45CB is a high-speed 4K x 8 Dual-Port Static RAM designed for systems requiring simultaneous access to memory locations without on-chip hardware arbitration. This asynchronous SRAM features true dual-ported memory cells, allowing independent operation from either port. It operates on a TTL-compatible single 5V power supply with a voltage range of 4.5V to 5.5V. The component supports automatic power-down modes controlled by chip enable signals to minimize standby power consumption. It is housed in a 48-pin CDIP-SB package and is designated as an end-of-life product.

Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location from both ports.
• Fully asynchronous operation supporting external arbitration or contention handling for wait-state-free system designs.
• Automatic power-down feature controlled by chip enable inputs to achieve very low standby power consumption.
• TTL-compatible single 5V power supply operation ensuring compatibility with standard logic families.

Applications

• Systems requiring simultaneous data access from multiple processors without on-chip arbitration.
• High-speed digital signal processing applications tolerant of external contention management.
• Industrial control systems utilizing asynchronous parallel memory interfaces.
• Military grade embedded systems compliant with MIL-PRF-38535 QML standards.

Procurement Notes

This component is officially classified as End-of-Life (EOL) by Renesas Electronics Corporation. Procurement is restricted to existing stock or surplus markets only. Verify RoHS compliance status carefully, as legacy parts often lack current environmental certifications. Confirm package integrity and pin compatibility before integration into new designs due to discontinuation risks.

Selection Notes

Select this part only when specific legacy interface requirements mandate a 48-pin CDIP package with 45ns access time. Ensure the design can handle potential bus contention during simultaneous port accesses since hardware arbitration is absent. Consider alternative modern dual-port SRAMs if lead-free packaging or industrial temperature ranges are required, as this model may not support all current environmental directives.

Part Context

The 7134 series represents a family of high-speed CMOS dual-port static random-access memories. The 7134LA45CB specifically denotes the LA variant operating within the commercial temperature range, packaged in ceramic dual in-line format. This series was engineered for applications demanding high throughput and independent port access, bridging the gap between fast synchronous memories and flexible asynchronous architectures.

Replacement Considerations

Public confirmed substitute part numbers are not available for this discontinued model. Designers must evaluate functional equivalents based on pinout compatibility, access speed, and power specifications. Cross-referencing with other dual-port SRAM families is necessary to ensure mechanical and electrical interchangeability in existing hardware layouts.