7142LA35L48B

Overview

The Renesas Electronics Corporation 7142LA35L48B is a dual-port static random access memory (SRAM) device with a storage capacity of 32 kbit, organized as 4K x 8. It features an asynchronous parallel interface and offers a maximum access time of 35 ns. The component operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum power current of 250 mA. Designed for surface mount applications, it is housed in a 48-pin LCC package. The device supports single data rate (SDR) operations and functions across an industrial temperature range from -55°C to +125°C.

Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location by two separate ports.
• Integrated BUSY input flag mechanism to manage data transfer timing and prevent bus contention during concurrent operations.
• Automatic power-down functionality controlled by chip enable signals, allowing on-chip circuitry to enter low standby power mode.
• TTL-compatible operation utilizing a single 5V ±10% power supply for simplified system integration.

Applications

• High-speed data buffering in systems requiring full-speed error-free operation without additional discrete logic.
• Slave dual-port RAM configurations paired with Master dual-port devices in word width expansion architectures.
• Industrial control systems operating within extended temperature environments up to 125°C.
• Battery backup applications supporting 2V data retention capabilities.

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm RoHS compliance requirements as indicated specifications may vary. Validate package integrity upon receipt. Ensure thermal management aligns with specified operating limits. Review datasheet for specific handling precautions related to electrostatic discharge sensitivity.

Selection Notes

Evaluate system requirements against the 35 ns access time and 32 kbit capacity constraints. Verify compatibility with existing TTL-compatible logic levels and 5V supply rails. Assess physical space availability for the 48-pin LCC surface mount package. Consider thermal dissipation needs given the 250 mA maximum current draw. Confirm that the asynchronous interface meets timing requirements of the host controller.

Part Context

This component belongs to the 7142 series of high-speed dual-port SRAMs designed for seamless integration with 7132 series master devices. It provides a robust solution for expanding memory word widths in complex digital systems. The LA variant specifically denotes enhanced industrial temperature performance and battery backup support, distinguishing it from standard commercial grade counterparts within the broader product family.

Replacement Considerations

Public confirmed substitute part numbers are not available for this discontinued model. Designers should evaluate pin-compatible alternatives or redesign interfaces if sourcing new inventory is required. Consult manufacturer archives for potential legacy replacement recommendations.