7142LA55J

Overview

The Renesas Electronics Corporation 7142LA55J is a high-speed, asynchronous dual-port static random-access memory (SRAM) IC. It features a storage capacity of 16 kilobits organized as 2K x 8 bits. The device utilizes a parallel interface with a maximum access time of 55 nanoseconds. It operates on a single 5V power supply within a voltage range of 4.5V to 5.5V. The component is housed in a 52-pin Plastic Leadless Chip Carrier (PLCC) package designed for surface-mount technology.

Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location by two separate ports without conflict.
• Integrated BUSY input flag mechanism that signals when a port is accessing memory, facilitating synchronization between master and slave devices.
• Battery backup capability supporting data retention at voltages as low as 2V, ensuring non-volatile data preservation during primary power loss.

Applications

• High-speed data buffering in communication systems requiring concurrent read/write operations.
• Master-slave configurations in embedded systems where multiple processors share memory resources simultaneously.
• Industrial control applications necessitating reliable data retention under fluctuating power conditions.

Procurement Notes

Verify component authenticity through authorized distributors due to discontinuation status. Confirm RoHS compliance requirements as this specific part may not meet current environmental standards. Validate package integrity upon receipt, as PLCC components are sensitive to mechanical stress during handling and installation.

Selection Notes

Select this component for designs requiring true dual-port functionality with minimal external logic overhead. Ensure system voltage aligns with the specified 4.5V to 5.5V operating range. Consider the 55ns access speed against system timing requirements and verify thermal management capabilities for the PLCC package in enclosed environments.

Part Context

This device belongs to the 7142 series of dual-port SRAMs manufactured by Renesas Electronics. It serves as a specialized memory solution for applications demanding high throughput and concurrent access. The series is characterized by its TTL-compatible operation and robust data retention features, distinguishing it from standard single-port SRAMs in complex multi-processor architectures.

Replacement Considerations

Public confirmed substitute part numbers: IDT7142SA55J, IDT7142LA55J.