QS7201-25Q

FIFOs Memory Overview

The QS7201-25Q is an asynchronous FIFO memory device manufactured by Quality Semiconductor. It features a memory organization of 512 words by 9 bits, providing a total density of 4.5K bits. The component supports a maximum data rate of 28MHz with a specified access time of 25ns. It operates within a supply voltage range of 4.5V to 5.5V and utilizes CMOS technology. The device is designed for parallel data transfer applications requiring asynchronous buffering capabilities.

FIFOs Memory Feature Summary

• Asynchronous operation mode for independent read and write clock domains
• CMOS technology ensuring low power consumption and high noise immunity
• 3-state outputs for easy bus interfacing and system integration

FIFOs Memory Applications

• Data buffering between microprocessors and peripheral devices
• Interface bridging between systems operating at different clock speeds
• Temporary storage in digital signal processing pipelines

FIFOs Memory Procurement Notes

Verify the specific package variant, as the QS7201 series includes plastic and ceramic options. Confirm that the 25ns speed grade matches system timing requirements. Ensure compatibility with 5V logic levels. Check for RoHS compliance status if required by your manufacturing standards. Validate pinout alignment with existing PCB layouts before finalizing procurement.

FIFOs Memory Selection Notes

Select this part when asynchronous decoupling is required between subsystems with mismatched clock frequencies. The 512x9 organization suits applications needing moderate buffer depth with 9-bit data paths. Consider the 25ns access time against system cycle times. Evaluate thermal performance if operating near maximum temperature limits. Compare against synchronous alternatives if clock domain crossing complexity can be managed differently.

FIFOs Memory Part Context

Quality Semiconductor was acquired by Microchip Technology. The QS7201 series belongs to a family of asynchronous FIFOs offering various depths and speeds. This specific model represents the 25ns speed grade within the 512-word depth category. The product line continues to be supported under the Microchip portfolio for legacy system maintenance.

FIFOs Memory Replacement Considerations

Direct substitutes include other QS7201 variants with different access times or packages, such as the QS7201-80J. Cross-reference with Microchip's current FIFO offerings for modern equivalents. Verify pin-to-pin compatibility before substituting with generic asynchronous FIFOs.