QS72235-35J

Specialized ICS Overview

The QS72235-35J is an asynchronous FIFO memory device manufactured by Quality Semiconductor. It features a memory organization of 2K x 9 bits, providing a total memory density of 18 kilobits. The component supports a maximum access time of 35 nanoseconds and operates with a cycle time of 35 nanoseconds. It utilizes CMOS technology and is housed in a 32-pin Plastic Quad Flat Pack (PQCC) package. The device functions within a supply voltage range of 4.5 volts to 5.5 volts and includes three-state output characteristics for flexible bus interfacing.

Specialized ICS Feature Summary

• Asynchronous operation mode for independent read and write clock domains
• Three-state outputs for direct bus connection compatibility
• CMOS construction ensuring low power consumption

Specialized ICS Applications

• Data buffering between high-speed processors and slower peripherals
• Interface bridging between different logic voltage levels or speeds
• Temporary data storage in communication protocol converters

Specialized ICS Procurement Notes

Verify the specific suffix 'J' indicates the standard plastic quad flat pack package configuration as documented in official manufacturer specifications. Confirm that the asynchronous nature of the device aligns with system timing requirements, as it does not utilize a single shared clock for read and write operations. Ensure supply voltage constraints are strictly maintained within the specified operational limits to guarantee reliable performance.

Specialized ICS Selection Notes

Select this component when asynchronous data transfer is required between systems operating at different clock rates. The 9-bit word width accommodates standard byte-oriented data with parity or error-checking bits. Consider the 35-nanosecond access speed relative to system throughput needs. The 32-pin package form factor should be evaluated against available PCB space and routing constraints compared to alternative pinout configurations.

Specialized ICS Part Context

This part belongs to the QS722xx series of asynchronous FIFOs from Quality Semiconductor. These devices are designed for general-purpose data buffering applications where decoupling of read and write domains is necessary. The series typically offers various access times and memory depths to suit different bandwidth requirements while maintaining standard CMOS logic compatibility.

Specialized ICS Replacement Considerations

Cross-reference with other asynchronous FIFOs offering similar 2Kx9 organization and 35ns access times. Verify pin-to-pin compatibility if substituting directly on existing boards. Ensure equivalent supply voltage ranges and three-state output capabilities are present in potential replacement parts.