AS7C31024B-20TCN

Overview

The AS7C31024B-20TCN is a 1 Mbit (128K x 8) asynchronous static random access memory manufactured by Alliance Memory. It operates within a voltage range of 3 V to 3.6 V and features a maximum access time of 20 ns. The device utilizes a parallel interface and is housed in a 32-pin TSOP I surface-mount package. It supports single data rate (SDR) operation with a maximum supply current of 55 mA. The component is rated for commercial temperature applications, functioning between 0°C and +70°C.

Feature Summary

• Asynchronous parallel SRAM architecture providing direct data access without clock synchronization requirements.
• Single voltage supply operation compatible with standard 3.3 V logic systems.
• Surface-mount TSOP I packaging designed for compact board integration.

Applications

• General-purpose data storage in embedded microcontroller systems
• Cache memory implementation for high-speed processing units
• Buffer storage in industrial control equipment

Procurement Notes

Verify the specific suffix TCN against the manufacturer's official datasheet to confirm pinout compatibility and electrical specifications. Ensure the ordering quantity meets the distributor's minimum order requirements, as this component may be supplied in trays. Confirm that the commercial temperature rating aligns with the operational environment of the target application before finalizing procurement.

Selection Notes

Select this component when a 1 Mbit capacity with 20 ns access speed is required for 3.3 V systems. Compare against faster variants like the -12JCN if lower latency is critical, or larger capacity options if more storage is needed. Ensure the TSOP I package fits the available PCB footprint and that the commercial temperature range suffices for the intended operating conditions.

Part Context

This part belongs to the AS7C31024B series of 1 Mbit CMOS SRAMs from Alliance Memory. It shares architectural similarities with other members of the family but differs in access speed and package type. The -20TCN designation specifically indicates the 20 ns speed grade and the TSOP I package configuration, distinguishing it from SOJ or faster asynchronous variants within the same memory density class.

Replacement Considerations

Direct substitutes include the AS7C31024B-12JCN for faster performance in the same density, or the AS7C31024B-20TIN if a different package style is acceptable. Verify pin compatibility and voltage levels when cross-referencing with other manufacturers' equivalent 128K x 8 SRAM devices.