23A512T-E/SN

Memory IC Overview

The Microchip Technology 23A512T-E/SN is a 512-Kbit Serial SRAM device featuring SPI, SDI, and SQI interfaces. It operates within a supply voltage range of 1.7V to 2.2V and supports an industrial temperature range of -40°C to +85°C. The device offers a maximum clock frequency of 20 MHz with unlimited read/write cycles and zero write time. It utilizes a 64K x 8-bit organization with 32-byte page structures.

Memory IC Feature Summary

• Supports high-speed data transfer via Serial Dual Interface (SDI) and Serial Quad Interface (SQI) modes alongside standard SPI.
• Provides flexible memory access through Byte, Page, and Sequential operation modes controlled by the MODE register.
• Features a Hold function to suspend serial communication sequences without resetting the internal address pointer.
• Ensures data retention down to 1.0V while maintaining low standby current consumption.

Memory IC Applications

• Data logging in battery-powered embedded systems
• Buffering operations for microcontroller peripheral interfaces
• Configuration storage requiring rapid random access

Memory IC Procurement Notes

Verify the specific suffix 'E' confirms Extended temperature rating (-40°C to +125°C) if required, though the base datasheet lists Industrial range for the 23A512 series. Confirm the 'SN' package corresponds to the 8-Lead SOIC form factor. Ensure the ordering code includes the 'T' for tape and reel packaging if automated assembly is intended. Cross-reference the manufacturer part number against official Microchip databases to validate authenticity.

Memory IC Selection Notes

Select this component when low-voltage operation between 1.7V and 2.2V is necessary, distinguishing it from the 23LC512 variant which requires 2.5V minimum. Choose the SN package for surface-mount applications requiring narrow body dimensions. Consider the SQI capability if host controllers support quad I/O for increased throughput. Verify that the 512Kbit capacity aligns with system memory requirements before finalizing the design.

Memory IC Part Context

This device belongs to the 23A512/23LC512 family of 512-Kbit Serial SRAMs. The 23A512 variant is specifically designed for lower voltage applications compared to the 23LC512. Both share identical pinouts and instruction sets but differ in electrical specifications regarding supply voltage ranges and operating temperatures.

Memory IC Replacement Considerations

The 23LC512 serves as a functional substitute if the application voltage exceeds 2.5V. Other Microchip SRAMs with compatible SPI interfaces may require firmware adjustments due to differing command sets or timing parameters.

Memory IC FAQ

How does the HOLD pin function during serial communication?

The HOLD pin suspends transmission when pulled low while the device is selected. Communication resumes when held high, preserving the internal address pointer without re-transmitting the sequence.

What is the difference between Byte, Page, and Sequential modes?

Byte mode accesses single bytes; Page mode limits operations to a 32-byte boundary; Sequential mode allows continuous reading or writing across page boundaries until the array end is reached.