25LC160T/SN

Overview

The Microchip Technology 25LC160T/SN is a 16 Kbit (2048 x 8-bit) Serial Electrically Erasable PROM. It utilizes an SPI-compatible serial bus for communication, requiring SCK, SI, SO, and CS signals. The device operates within a voltage range of 2.5V to 5.5V with a maximum clock frequency of 2 MHz. It features a 16-byte page write capability and self-timed erase/write cycles of 5 ms maximum. The component supports industrial temperature ranges from -40°C to +85°C and is housed in an 8-lead Plastic Small Outline (SN) package.

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 Hold pin to suspend transmission without resetting the serial sequence.
• Provides high reliability with specified endurance and long-term data retention.

Applications

• Microcontroller system data storage
• Configuration parameter storage
• Calibration data retention

Procurement Notes

Verify that the ordering suffix 'T' corresponds to tape and reel packaging as defined in the manufacturer's product identification system. Confirm the 'I' temperature grade matches the required operational range of -40°C to +85°C. Ensure the 'SN' package designation aligns with the intended surface mount footprint requirements.

Selection Notes

Select this component for applications requiring low-power CMOS technology and simple SPI interface compatibility. Consider the 2.5V minimum operating voltage when designing power supply rails. Evaluate the 16-byte page size against write frequency requirements to optimize internal write cycle timing.

Part Context

This part belongs to the 25XX160 family of 16 Kbit Serial EEPROMs. The datasheet explicitly states that this specific generation is not recommended for new designs and suggests using the 25AA160A/B or 25LC160A/B series instead. The 'T' suffix indicates tape and reel packaging, while 'SN' denotes the 8-lead SOIC package.

Replacement Considerations

Public documentation recommends using 25LC160A/B series devices as replacements. Verify pinout compatibility and updated electrical specifications before substitution.

FAQ

How does the HOLD pin function during serial communication?

The HOLD pin suspends transmission to the device without resetting the serial sequence. Transitions on SI, SCK, and SO are ignored while held low, and the SO line goes high-impedance.

What is the purpose of the Write Enable Latch?

The Write Enable Latch must be set via the WREN instruction before any write operation can be completed. It resets automatically after power-up, successful write execution, or WRDI instruction.