7008S12JI8

Memory IC Overview

The Renesas Electronics Corporation 7008S12JI8 is a high-speed, 512Kbit (64K x 8) dual-port static RAM. It features asynchronous parallel operation with a 12 ns access time and write cycle time. The device operates on a single 5V supply (4.5V to 5.5V) and supports simultaneous independent reads from both ports. It is housed in an 84-pin PLCC package with J-leads.

Memory IC Feature Summary

• True dual-ported memory cells allow simultaneous reads of the same memory location without conflict.
• On-chip hardware support for semaphore signaling enables efficient port arbitration between processors.
• Automatic power-down feature controlled by chip enable permits very low standby power mode.
• TTL-compatible single 5V power supply simplifies interface design with standard logic families.

Memory IC Applications

• Stand-alone 512K-bit dual-port memory systems
• Master/slave dual-port configurations for 16-bit or wider word systems
• Real-time data buffering requiring concurrent processor access

Memory IC Procurement Notes

Verify component authenticity through authorized distributors as this part may be discontinued. Confirm RoHS3 compliance status and check for specific EOL notices from Renesas. Ensure the 84-PLCC package matches your PCB footprint requirements before finalizing procurement decisions.

Memory IC Selection Notes

Select this component when simultaneous independent access to shared memory is required. The 12 ns speed suits high-performance applications. Consider the 84-PLCC package constraints versus surface-mount alternatives like TQFP if space is limited. Verify voltage compatibility with the 5V system architecture.

Memory IC Part Context

Part of the 7008 series of dual-port SRAMs, offering various access speeds and packages. This model specifically provides 12 ns performance in an 84-pin PLCC form factor, bridging legacy PLCC designs with modern high-speed memory needs.

Memory IC Replacement Considerations

Check for direct substitutes within the 7008 family such as 7008L20JGI8 or 7008S35J8, noting differences in access time and temperature range. Verify pinout compatibility and electrical specifications before substitution.

Memory IC FAQ

Can both ports read the same memory address simultaneously?

Yes, the true dual-ported memory cells allow simultaneous reads of the same memory location from either port without conflict.

What is the power consumption characteristic during idle states?

An automatic power-down feature controlled by the chip enable signal allows the on-chip circuitry to enter a very low standby power mode.