7008L12JI

Memory IC Overview

The Renesas 7008L12JI is a high-speed, 512Kbit (64K x 8) dual-port asynchronous SRAM memory IC. It features true dual-ported memory cells allowing simultaneous independent reads and writes from two ports. The device operates with a single 5V supply and supports TTL-compatible logic levels. Key electrical specifications include a 12 ns access time and a write cycle time of 12 ns. It functions within an industrial temperature range of -40°C to +85°C. The component is housed in an 84-pin PLCC package with J-leads, measuring 29.31x29.31 mm.

Memory IC Feature Summary

• True dual-ported architecture enabling simultaneous independent access to the same memory location by both ports.
• On-chip hardware support for semaphore signaling and port arbitration logic to manage data integrity between ports.
• Automatic power-down feature controlled by chip enable signals to achieve very low standby power modes.
• Supports battery backup operation with data retention down to 2V.

Memory IC Applications

• Stand-alone 512K-bit dual-port RAM systems
• Master/slave dual-port configurations for 16-bit or wider word systems
• Industrial embedded control applications requiring fast asynchronous memory access

Memory IC Procurement Notes

Verify RoHS compliance status as legacy variants may differ. Confirm package authenticity against the 84-PLCC specification. Check for End-of-Life notices or Product Change Notifications regarding manufacturing site changes. Ensure voltage supply stability within the 4.5V to 5.5V range during operation.

Memory IC Selection Notes

Select this component when simultaneous bidirectional data transfer is required without external arbitration overhead. Compare access times against system clock requirements. Verify thermal performance within the specified industrial temperature range. Consider pin compatibility if replacing older IDT variants.

Memory IC Part Context

This part belongs to the 7008 series of dual-port SRAMs, which also includes variants like the 7008L20 and 7008L15. These devices share the same 64K x 8 architecture but differ primarily in access speed and package options. The series is designed for high-performance buffering and queue management in digital signal processing and telecommunications equipment.

Memory IC Replacement Considerations

Direct substitutes include other 7008 series variants such as the 7008L20JGI8 or 7008L15PF, provided timing constraints are met. Cross-reference with IDT7008L12JI equivalents. Verify package footprint compatibility for 84-PLCC installations.