7134LA55L48B

Overview

The 7134LA55L48B is a high-speed 4K x 8 Dual-Port Static RAM manufactured by Renesas Electronics Corporation. It features true dual-ported memory cells allowing simultaneous access to the same location from either port. The device operates asynchronously with a typical access time of 55 ns and supports a TTL-compatible single 5V power supply (±10%). It includes an automatic power-down feature controlled by chip enable inputs for low standby power. The component is housed in a 48-pin Leadless Ceramic Chip Carrier (LCC) package suitable for surface-mount applications.

Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to shared memory locations without on-chip hardware arbitration.
• Fully asynchronous operation from both ports, designed for systems requiring external arbitration or contention handling.
• Automatic power-down mode controlled by CE inputs, allowing on-chip circuitry to enter very low standby power states.

Applications

• Systems requiring high-speed data exchange between two independent processors or controllers.
• Applications where on-chip hardware port arbitration is not implemented or desired.
• Real-time control systems that cannot tolerate wait states during memory access.

Procurement Notes

Verify the specific suffix L48B against official Renesas documentation to confirm the 48-pin LCC package and industrial temperature range specifications. Confirm RoHS compliance status as legacy variants may differ. Check current product lifecycle status, as this series may be subject to obsolescence notices. Ensure pinout compatibility with existing PCB layouts before procurement.

Selection Notes

Select this component when dual-port functionality is required for concurrent read/write operations without internal arbitration logic. Compare access times and power consumption against other 7134 series variants if different speed grades or packages are needed. Verify voltage tolerance and temperature range requirements against the specific operational environment constraints.

Part Context

The 7134 series represents a family of high-speed dual-port SRAMs designed for parallel interface applications. This specific model belongs to the LA variant line, which typically denotes ceramic packaging and extended temperature capabilities compared to standard plastic DIP versions. It serves as a critical memory buffer in multi-processor architectures.

Replacement Considerations

Official substitutes include other 7134 series variants such as IDT7134SA55P for DIP packages or IDT7134LA35L48B for faster 35ns speeds in the same LCC package. Cross-reference pinouts and electrical characteristics carefully when substituting.