7142LA55CB

Overview

The Renesas Electronics Corporation 7142LA55CB is a high-speed 16Kbit (2K x 8) Dual-Port Static Random Access Memory. It operates with a maximum access time of 55 ns and requires a single 5V ±10% power supply, ranging from 4.5 V to 5.5 V. The device features parallel interface type and asynchronous storage technology. It supports battery backup operation with 2V data retention and includes an automatic power-down feature controlled by the Chip Enable signal for low standby power modes. The component is housed in a 48-pin Ceramic Dual In-Line Package with Sidebrazed leads (CDIP-SB-48).

Feature Summary

• True dual-ported memory cells enabling simultaneous independent access to the same memory location by two separate processors.
• Designed as a slave dual-port RAM unit, allowing full-speed error-free operation in 16-bit or wider systems when paired with master dual-port devices without additional discrete logic.
• Supports battery backup operation maintaining data retention at 2V, ensuring data integrity during primary power loss.

Applications

• High-speed data buffering in multiprocessor communication architectures.
• Real-time control systems requiring concurrent read/write operations.
• Industrial automation equipment utilizing dual-port memory interfaces.

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm package integrity for the ceramic dual-in-line configuration. Check datasheet revisions for any pinout or electrical specification updates prior to integration into new designs.

Selection Notes

Select this component for applications requiring true simultaneous dual-port access without external arbitration logic. Ensure system design accommodates the specific CDIP-SB-48 package dimensions and thermal requirements. Verify compatibility with master dual-port controllers for proper bus management in wide-word configurations.

Part Context

This part belongs to the 7142 series of dual-port SRAMs manufactured by Renesas Electronics. It serves as the slave counterpart to the 7132 master dual-port RAM, facilitating expanded word width systems. The series is characterized by CMOS technology and TTL-compatible inputs, targeting high-performance embedded memory needs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consider evaluating other members of the 7142 family or consulting manufacturer resources for current equivalent offerings.