709079L9PFI8

Memory IC Overview

The Renesas Electronics Corporation 709079L9PFI8 is a 256Kb (32K x 8) synchronous dual-port static RAM. It features true dual-ported memory cells allowing simultaneous access to the same location from both ports. The device operates on a single 5V power supply and supports flow-through or pipelined output modes selectable via the FT/PIPE pin. It includes counter enable and reset features for address generation, with dual chip enables facilitating depth expansion without additional logic.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to any memory location from both ports.
• Configurable flow-through or pipelined output modes selectable via the dedicated FT/PIPE control pin.
• Integrated address counter with enable and reset capabilities for automated sequential addressing.
• Dual chip enable inputs allow for depth expansion configurations without requiring external decoding logic.

Memory IC Applications

• High-speed burst data transfer applications requiring unidirectional or bidirectional data flow
• System designs utilizing depth expansion through multiple chip banking
• Synchronous interface implementations requiring registered address and control inputs

Memory IC Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm package integrity and lead condition prior to installation. Ensure proper handling procedures are followed due to moisture sensitivity classification. Validate that the specific speed grade matches system timing requirements before integration into final assembly processes.

Memory IC Selection Notes

Select this component when a synchronous dual-port SRAM with a 5V interface is required. Consider the pipelined mode for higher throughput or flow-through for lower latency needs. Verify that the industrial temperature range option meets environmental constraints. Ensure the 100-pin TQFP package fits the available board space and routing constraints.

Memory IC Part Context

This part belongs to the IDT709089/79 family of high-speed synchronous dual-port static RAMs. It shares architectural similarities with the 64K x 8 variant but offers half the density. The device utilizes CMOS technology for low-power operation and is designed for applications demanding fast cycle times and minimal setup/hold times on control inputs.

Memory IC Replacement Considerations

The IDT709089L9PFI8 serves as a compatible replacement offering identical functionality with double the density. Verify voltage compatibility and pin alignment before substitution. Ensure the replacement part supports the required pipelined or flow-through modes and meets the necessary speed grades for the target application.

Memory IC FAQ

How is the output mode configured?

The output mode is selected using the FT/PIPE pin. A low voltage sets the port to flow-through mode, while a high voltage configures it for pipelined output.

What is the function of the CNTEN pin?

The Counter Enable (CNTEN) pin controls the internal address counter. When asserted, it allows the address to advance automatically on each clock cycle during read operations.

Can this device be used for depth expansion?

Yes, the device features dual chip enables (CE0 and CE1) that allow multiple chips to be connected in depth expansion configurations without additional external logic.