7009L20PFI

Memory IC Overview

The Renesas Electronics Corporation 7009L20PFI is a high-speed, 1M-bit (128K x 8) Dual-Port Static RAM. It features true dual-ported memory cells allowing simultaneous reads of the same location from either port. The device operates asynchronously with a maximum access time of 20 ns and supports a single 5V power supply with TTL-compatible inputs. It includes on-chip arbitration logic, interrupt flags, and semaphore signaling for hardware synchronization. An automatic power-down feature controlled by Chip Enable reduces standby current. The component is housed in a 100-pin TQFP package and supports industrial temperature ranges.

Memory IC Feature Summary

• True dual-ported architecture enabling simultaneous independent access to shared memory locations
• Integrated hardware support for port arbitration, semaphore signaling, and interrupt flags
• Automatic low-power standby mode activated via Chip Enable control
• TTL-compatible interface with single 5V power supply operation

Memory IC Applications

• Stand-alone 1M-bit dual-port memory systems
• Master/Slave dual-port configurations for 16-bit or wider data bus expansion
• High-speed data processing requiring concurrent read/write operations
• Industrial applications requiring asynchronous dual-port communication

Memory IC Procurement Notes

Verify component authenticity through authorized distributors as this part may be obsolete. Confirm package integrity and pin alignment for the 100-pin TQFP form factor. Ensure voltage levels match the specified 5V requirement. Check for lead-free status if RoHS compliance is mandatory for your assembly process. Validate that the specific suffix corresponds to the desired temperature grade and packaging type.

Memory IC Selection Notes

Select this component when simultaneous independent access to shared memory is required without external arbitration circuitry. It is suitable for systems needing 20 ns access speeds with a 5V logic interface. Consider the 100-pin TQFP package constraints for PCB layout. Verify that the asynchronous nature aligns with your system clock requirements. Ensure compatibility with existing TTL-level signal drivers.

Memory IC Part Context

This device belongs to the Renesas 7009 series of dual-port SRAMs. It is designed for applications requiring high-speed data sharing between two processors or controllers. The series offers various access times and package options. The 7009L20PFI specifically denotes the 20 ns speed grade and 5V operation within the standard industrial lineup.

Memory IC Replacement Considerations

Check for direct pin-to-pin replacements within the 7009 series with different speed grades or package suffixes. Verify functional equivalence regarding arbitration logic and power consumption. Ensure substitute parts maintain the 128K x 8 organization and 100-pin TQFP footprint.