25LC160/P

Overview

The Microchip Technology 25LC160/P is a 16 Kbit (2048 x 8-bit) Serial Electrically Erasable PROM. It utilizes an SPI-compatible serial bus with SCK, SI, SO, and CS signals for communication. The device operates within a voltage range of 2.5 V to 5.5 V and supports a maximum clock frequency of 2 MHz. It features self-timed erase and write cycles with a maximum cycle time of 5 ms. The component is housed in an 8-pin PDIP package and supports industrial temperature ranges.

Feature Summary

• Supports block write protection allowing selection of none, 1/4, 1/2, or all array segments.
• Includes built-in power on/off data protection circuitry and a write enable latch.
• Features a dedicated hold pin to suspend transmission without resetting the sequence.
• Provides high reliability with specified endurance and long-term data retention.

Applications

• Interfacing directly with microcontroller SPI ports
• Storing configuration data in embedded systems
• Data logging applications requiring non-volatile storage

Procurement Notes

Verify the specific suffix 'P' corresponds to the 8-lead Plastic DIP package. Confirm the operating voltage range matches the system requirements of 2.5 V to 5.5 V. Check for any export restrictions or additional documentation required for procurement. Ensure the component meets the necessary environmental standards for the intended application environment.

Selection Notes

Select this part for designs requiring low-power CMOS technology and simple serial interface compatibility. Consider the 2 MHz maximum clock speed and 5 ms write cycle time for timing constraints. Evaluate the need for hardware write protection via the WP pin versus software-based protection mechanisms. Verify that the 8-pin PDIP package fits the available board space and assembly process.

Part Context

This component belongs to the 25XX160 family of 16 Kbit Serial EEPROMs from Microchip Technology. It is designed for direct interface with popular microcontroller families. The datasheet indicates it is not recommended for new designs, suggesting consideration of newer alternatives like the 25AA160A/B or 25LC160A/B series for future projects.

Replacement Considerations

Public confirmed substitute part numbers: 25LC160A-E/P, 25LC160D-H/SN, 25LC160C-E/P.

FAQ

How does the HOLD pin function during serial communication?

The HOLD pin suspends transmission when pulled low while SCK is low, pausing communication without resetting the sequence. Transitions on SI, SCK, and SO are ignored during this state.

What is the purpose of the Write-Protect (WP) pin?

The WP pin prohibits writes to nonvolatile bits in the Status register when low and WPEN is high. When high, all functions operate normally. Its function can be blocked by clearing the WPEN bit.

How is the write enable latch managed?

The latch must be set via the WREN instruction before any write operation. It resets automatically upon power-up, successful execution of WRDI, WRSR, or WRITE instructions.