7142LA55C

Overview

The Renesas Electronics Corporation 7142LA55C is a high-speed 16K-bit (2K x 8) dual-port static random-access memory (SRAM). It operates on a single 5V power supply with a voltage range of 4.5V to 5.5V and features a 55 ns access time. The device utilizes parallel interface technology for asynchronous data transfer. It is housed in a 48-pin ceramic dual in-line package (CDIP-SB-48) designed for through-hole mounting. The component supports battery backup operation for data retention down to 2V and includes an automatic power-down feature controlled by the chip enable signal.

Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location from two separate ports.
• TTL-compatible single 5V power supply operation simplifying integration into standard logic systems.
• Battery backup capability ensuring data retention at voltages as low as 2V for critical information preservation.
• Automatic power-down mode reduces standby power consumption when the chip enable input is deactivated.

Applications

• High-speed data buffering in communication systems requiring full-duplex data handling.
• Master-slave configurations in 16-bit or wider word width systems utilizing the 7132 master dual-port RAM.
• Industrial control applications requiring reliable data storage with extended temperature range capabilities.

Procurement Notes

Verify component authenticity and datasheet revision status due to end-of-life manufacturing status. Confirm package integrity and pin compatibility during replacement planning. Check for RoHS compliance variations across production lots. Validate electrical specifications against original system requirements before integration.

Selection Notes

Select this component for designs requiring true dual-port functionality without external arbitration logic. Ensure the application supports the 48-pin CDIP package constraints. Verify that the 55 ns speed meets system timing requirements. Consider the industrial temperature range availability if operating in extreme environments.

Part Context

The 7142 series belongs to Renesas' high-speed dual-port SRAM family, originally developed by Integrated Device Technology (IDT). These devices are engineered for complex data processing tasks where concurrent read/write operations are essential. The 7142 specifically serves as a slave device in multi-port architectures, complementing master devices like the 7132 to expand data bus widths efficiently.

Replacement Considerations

• 7142SA55P
• 7142SA55CB