71342LA55PFI8

Overview

The 71342LA55PFI8 is a dual-port static random-access memory (SRAM) integrated circuit manufactured by Renesas Electronics Corporation. It features a storage capacity of 32 kilobits organized as 4K words by 8 bits. The device utilizes an asynchronous parallel interface with a maximum access time of 55 nanoseconds. It operates on a single 5V power supply within a voltage range of 4.5V to 5.5V. The component is housed in a 64-pin Thin Quad Flat Package (TQFP) and supports an industrial operating temperature range from -40°C to +85°C.

Feature Summary

• True dual-ported architecture enabling simultaneous independent access to the same memory location from both ports.
• Integrated semaphore logic block for hardware-based arbitration and signaling between the two ports.
• Asynchronous operation allowing flexible timing control without reliance on a global clock signal.
• Automatic power-down mode activated when chip enable and semaphore signals are high, reducing standby current.

Applications

• High-speed data buffering in telecommunications equipment requiring concurrent read/write operations.
• Network switch and router architectures utilizing dual-port memory for packet processing queues.
• Industrial control systems needing reliable data exchange between separate processor domains.
• Test and measurement instruments requiring fast, independent access to shared memory resources.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential availability of refurbished units. Confirm RoHS compliance status as older variants may not meet current environmental regulations. Check for specific suffix variations that indicate package type or temperature grade differences. Ensure proper handling procedures are followed given moisture sensitivity classification requirements during storage and assembly processes.

Selection Notes

Select this component when simultaneous bidirectional data access is required without external arbitration logic. Consider the 64-pin TQFP package for surface-mount applications requiring moderate pin density. Evaluate thermal performance within the specified industrial temperature range for long-term reliability. Compare access times against system timing constraints to ensure compatibility with faster host processors if necessary.

Part Context

This part belongs to the 71342 series of dual-port SRAMs, which offers varying speed grades and package options. The 'LA' designation typically indicates lead-free construction and extended temperature capabilities compared to standard 'SA' variants. The 'PFI8' suffix denotes the specific 64-pin TQFP package configuration with tape-and-reel packaging for automated assembly. This series provides a balance of performance and flexibility for embedded memory applications.

Replacement Considerations

Direct replacements include other 71342 series variants with compatible pinouts and electrical characteristics. Verify that substitute parts maintain the same 4Kx8 organization and 55ns access speed. Ensure alternative packages match the physical footprint and thermal requirements of the original design. Cross-reference datasheets to confirm identical semaphore functionality and power-down behavior.