25LC320A-I/MS

Overview

The Microchip Technology 25LC320A-I/MS is a 32-Kbit (4096 x 8-bit) Serial Electrically Erasable PROM accessed via an SPI-compatible serial bus. It operates within a supply voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 10 MHz at voltages between 4.5V and 5.5V. The device features self-timed erase and write cycles with a maximum duration of 5 ms. It includes block write protection capabilities, allowing protection of none, one-quarter, one-half, or the entire memory array. The component is housed in an 8-lead MSOP package and is rated for industrial temperature operation from -40°C to +85°C.

Feature Summary

• Supports high-speed serial communication with a maximum clock rate of 10 MHz.
• Provides hardware and software-based write protection mechanisms including block protection and power-on/off data protection.
• Features low-power CMOS technology with standby current as low as 5 µA.
• Includes a hold pin to suspend transmission without resetting the serial sequence.

Applications

• Microcontroller systems requiring non-volatile data storage
• Industrial control applications
• Embedded systems needing parameter storage

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the voltage range requirements align with the 2.5V to 5.5V specification for the LC variant. Ensure compatibility with the host system's SPI interface timing constraints. Check for any recent product change notifications regarding packaging or material composition.

Selection Notes

Select this part when a 32-Kbit capacity is sufficient and the application requires the 2.5V minimum operating voltage characteristic of the LC series. The MSOP package is suitable for space-constrained surface-mount designs. Consider the 10 MHz speed capability if higher throughput is needed compared to lower-speed EEPROM alternatives.

Part Context

This component belongs to the 25XX320A family of 32-Kbit SPI Serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 25AA320A but differs in its minimum operating voltage specification. The family utilizes PMOS electrically erasable cell technology for high reliability and endurance.

Replacement Considerations

Direct replacements include other 25LC320A variants with different packages such as PDIP, SOIC, TSSOP, or TDFN, provided the pinout remains compatible. Cross-family substitution with 25AA320A requires verification of the lower supply voltage support.