71421LA17PFI

Overview

The Renesas Electronics Corporation 71421LA17PFI is a high-speed, asynchronous dual-port static random-access memory (SRAM) device. It features a storage capacity of 16 kbit organized as 2k x 8 bits. The component offers a fast access time of 17 ns and operates within a supply voltage range of 4.5 V to 5.5 V. Designed for surface-mount applications, it is housed in a 64-pin Thin Quad Flat Package (TQFP). This memory IC supports parallel interface communication and includes automatic power-down capabilities controlled by chip enable signals.

Feature Summary

• Dual-port architecture enabling independent simultaneous access by two processors without external arbitration logic
• Integrated interrupt logic designed to facilitate efficient interprocessor communications
• Automatic power-down mode reduces standby current consumption when the device is deselected
• Asynchronous operation compatible with standard microprocessor timing requirements

Applications

• Interprocessor communication buffers in multi-processor systems
• Master/Slave RAM configurations for expanding data bus widths
• High-speed cache memory in embedded industrial controllers
• Data buffering in IoT gateway devices requiring low latency

Procurement Notes

Verify RoHS compliance status carefully, as historical records indicate non-compliance for this specific part number variant. Confirm moisture sensitivity level (MSL 3) handling requirements during assembly. Check for end-of-life or obsolescence notices from Renesas, as availability may be restricted. Ensure the supplier provides genuine factory-sealed units with traceable date codes to prevent counterfeit components.

Selection Notes

Select this component when dual-port functionality is required for direct processor-to-processor data exchange. The 17 ns speed suits applications needing rapid buffer turnover. Compare against the 71421LA35J if slower speeds are acceptable for cost reduction. Consider the 71321LA series if a TQFP package is preferred over the TQFP used here. Verify voltage compatibility with the target system's 5V logic levels.

Part Context

This device belongs to the Renesas 71421LA family of dual-port SRAMs, originally developed under IDT branding before acquisition. It serves as a slave memory unit often paired with master counterparts like the 71321 to create wider memory architectures. The LA suffix typically denotes specific speed grades and package variations within the broader 71421 product line.

Replacement Considerations

Public confirmed substitute part numbers include IDT71421LA17PFI. Cross-reference with other 71421LA variants such as 71421LA20PF for pin-compatible alternatives with different access times.