70261S55PFI

Memory IC Overview

The Renesas 70261S55PFI is a high-speed, asynchronous dual-port static random-access memory (SRAM) featuring a 256K-bit capacity organized as 16K words by 16 bits. It operates with a maximum access time of 55 nanoseconds and supports a single 5V power supply within the 4.5V to 5.5V range. The device utilizes a parallel interface and is housed in a 100-pin TQFP package with a 14x14mm footprint. Designed for industrial applications, it functions reliably across a temperature range of -40°C to +85°C.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location from both ports without conflict.
• Integrated hardware semaphore signaling and port arbitration logic to manage data integrity during concurrent read/write operations.
• Automatic low-power standby mode controlled by chip enable signals, reducing active current consumption when not in use.
• TTL-compatible inputs and outputs allowing direct interfacing with standard digital logic systems.

Memory IC Applications

• Stand-alone dual-port RAM modules for high-speed data buffering
• Master/Slave dual-port configurations in 32-bit or wider word systems
• Industrial control systems requiring reliable non-volatile-like data retention during power cycles

Memory IC Procurement Notes

Verify the specific suffix 'I' against official Renesas documentation to confirm industrial temperature grade compliance (-40°C to +85°C). Ensure the package type matches the 100-pin TQFP specification. Confirm RoHS status and moisture sensitivity level requirements prior to ordering, as these attributes are critical for assembly processes.

Memory IC Selection Notes

Select this component when simultaneous bidirectional data access is required without external arbitration circuitry. It is suitable for designs needing fast asynchronous operation at 55ns with a 5V logic interface. Consider the 16K x 16 organization for applications demanding wide data paths. Verify that the industrial temperature range meets the environmental constraints of the target system.

Memory IC Part Context

The 70261 series represents Renesas's high-performance dual-port SRAM family, designed to replace complex FIFOs or shared memory architectures. This specific model offers a balance of speed and density, facilitating efficient data exchange between processors or peripherals in embedded environments.

Memory IC Replacement Considerations

Publicly confirmed substitute part numbers for 70261S55PFI were not found in the provided source material. Consult official Renesas resources for potential upgrades or cross-references.