25LC320/P

Overview

The Microchip Technology 25LC320/P is a 32 Kbit serial Electrically Erasable PROM featuring a 4096 x 8 bit organization. It operates within a voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 2 MHz. The device utilizes a Serial Peripheral Interface (SPI) compatible bus for communication, including separate data in (SI), data out (SO), and clock (SCK) lines. It is housed in an 8-pin PDIP package and is designed for industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Supports sequential read operations with automatic address pointer incrementation across the memory array.
• Includes built-in write protection mechanisms such as a write enable latch, power-on/off data protection, and a dedicated write-protect pin.
• Features block write protection allowing users to protect none, one-quarter, one-half, or all segments of the memory array.

Applications

• Interfacing directly with microcontroller families equipped with SPI ports
• System configuration storage requiring non-volatile data retention
• Data logging applications utilizing page write capabilities

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature grade. Confirm that the 'P' designation corresponds to the PDIP package variant. Ensure compatibility with system voltage levels between 2.5V and 5.5V. Check for updated replacement recommendations as this series may be superseded by newer A-series devices.

Selection Notes

Select this component when a robust serial EEPROM with hardware write protection is required. The 25LC320/P is suitable for designs needing reliable data retention over extended periods. Consider the 2 MHz clock speed for moderate throughput requirements. Verify that the 8-pin PDIP package fits the available board space and assembly constraints.

Part Context

This device belongs to the 25XX320 family of serial EEPROMs manufactured by Microchip Technology. It shares architectural similarities with the 25AA320 and 25C320 variants, differing primarily in operating voltage and clock speed specifications. The family is designed for low-power applications using CMOS technology.

Replacement Considerations

Microchip recommends using the 25LC320A for new designs instead of the 25LC320. Verify electrical parameter equivalence before substitution.