7142LA5J

Overview

The Renesas Electronics Corporation 7142LA5J is a high-speed, asynchronous dual-port static random-access memory (SRAM) with a storage capacity of 16 kbit. It features a memory organization of 2K x 8 and supports parallel interface communication. The device operates within a supply voltage range of 4.5 V to 5.5 V, with a maximum power consumption of 80 mA. It offers an access time of 5 ns and functions reliably in commercial temperatures from 0°C to +70°C. The component is housed in a 52-pin PLCC surface-mount package.

Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location by both ports without conflict.
• Integrated BUSY input flag mechanism that signals when a port is accessing shared memory, facilitating seamless integration as a slave device in wider data bus systems.
• Automatic power-down functionality controlled by chip enable inputs, allowing on-chip circuitry to enter low standby power modes during idle periods.

Applications

• High-speed data buffering in telecommunications equipment requiring concurrent read/write operations.
• Embedded control systems utilizing master-slave dual-port RAM configurations for error-free operation without discrete logic.
• Industrial automation controllers needing reliable volatile memory with battery backup capabilities for data retention.

Procurement Notes

Verify end-of-life status before design finalization, as this component may be discontinued or subject to limited availability. Confirm RoHS compliance requirements, as specific variants may not meet current environmental standards. Validate package dimensions against PCB footprint specifications to ensure mechanical compatibility. Check moisture sensitivity levels for proper handling and reflow soldering procedures during assembly.

Selection Notes

Select this component when simultaneous dual-port access is required for high-throughput applications. Ensure system voltage aligns with the 4.5 V to 5.5 V operating range. Consider the 5 ns access speed for timing constraints. Verify thermal management needs for the commercial temperature range. Evaluate if the 52-pin PLCC package fits the available board space and manufacturing capabilities.

Part Context

The 7142LA5J belongs to the Renesas 7142 series of dual-port SRAMs, designed to operate alongside 7132 master devices. This family provides high-speed memory solutions for complex embedded systems. The LA suffix indicates commercial temperature range operation. The J suffix typically denotes the plastic leaded chip carrier package type used in surface-mount applications.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer resources for obsolescence management strategies or equivalent product recommendations.