7142LA25J

Overview

The Renesas Electronics Corporation 7142LA25J is a high-speed, asynchronous dual-port static random-access memory (SRAM) component. It features a storage capacity of 16 kilobits organized as 2K words by 8 bits per word. The device operates on a single 5.0V power supply with a specified voltage range of 4.5V to 5.5V. It provides an access time of 25 nanoseconds and utilizes a parallel interface for data transfer. The integrated circuit is housed in a 52-pin Plastic Leadless Chip Carrier (PLCC) package designed for surface-mount technology.

Feature Summary

• True dual-port architecture enabling simultaneous independent access to the same memory location from two separate ports
• Integrated BUSY input flag mechanism to manage arbitration and prevent bus contention during concurrent operations
• Automatic power-down functionality controlled by chip enable signals to minimize standby power consumption
• TTL-compatible logic levels allowing direct interfacing with standard digital systems without additional level shifting

Applications

• High-speed data buffering in telecommunications equipment requiring low-latency packet handling
• Real-time signal processing systems utilizing master-slave configurations for expanded data widths
• Industrial control units requiring reliable volatile memory for temporary state retention
• Embedded systems needing fast local memory for instruction execution or data caching

Procurement Notes

Verify current availability status as this component may be discontinued or subject to limited supply constraints. Confirm RoHS compliance requirements against specific project standards, noting that older variants often lack lead-free certification. Validate package dimensions and pinout compatibility with existing PCB footprints before finalizing procurement plans. Check for official obsolescence notices or recommended replacement parts from the manufacturer.

Selection Notes

Select this component when true dual-port capability is required for simultaneous read/write operations without external arbitration logic. Ensure the system design accommodates the 52-pin PLCC package constraints and thermal dissipation needs. Verify that the 25ns access speed meets the timing requirements of the target application bus. Consider the single 5V supply requirement for power budget calculations and noise immunity specifications.

Part Context

This part belongs to the 7142 series of dual-port SRAMs manufactured by Renesas Electronics. The series includes variations with different access speeds and packaging options. These devices are typically used in conjunction with master port counterparts to create scalable memory architectures. The LA suffix indicates specific electrical characteristics and temperature ranges suitable for industrial applications.

Replacement Considerations

Consult official manufacturer documentation for verified substitute part numbers. Cross-reference pinouts and electrical parameters carefully when evaluating alternatives. Ensure any replacement maintains the dual-port architecture and access speed requirements of the original design.