25C160-E/SN

Memory IC Overview

The Microchip Technology 25C160-E/SN is a 16 Kbit Serial Electrically Erasable PROM featuring SPI-compatible communication. It operates within a VCC range of 4.5V to 5.5V and supports a maximum clock frequency of 3 MHz. The device utilizes an 8-pin SOIC package and functions across an extended temperature range of -40°C to +125°C. Key electrical parameters include a typical standby current of 500 nA, a maximum write current of 3 mA, and a typical read current of 500 µA. Internal write cycles complete in 5 ms maximum.

Memory IC Feature Summary

• Supports block-level write protection for none, one-quarter, one-half, or the entire memory array via status register configuration.
• Includes hardware write-protect functionality controlled by the WP pin in conjunction with the WPEN bit.
• Features a hold input that suspends serial communication without resetting the sequence, allowing host interruption handling.
• Incorporates power-on data protection circuitry and a write enable latch to prevent inadvertent writes.

Memory IC Applications

• Data logging in automotive environments requiring extended temperature operation
• Configuration storage for microcontrollers with SPI interfaces
• Parameter retention in industrial control systems

Memory IC Procurement Notes

Verify the specific suffix 'E' confirms the -40°C to +125°C automotive temperature rating and 'SN' indicates the 8-lead SOIC package. Confirm the datasheet revision matches the required specifications as this component is marked not recommended for new designs. Ensure voltage supply constraints align with the 4.5V minimum requirement.

Memory IC Selection Notes

Select this part when an SPI EEPROM requires operation at voltages between 4.5V and 5.5V. The extended temperature grade is necessary for applications exposed to high ambient heat. Consider the 16-byte page write limit and the 5 ms internal write cycle time when designing system timing. Verify compatibility with the host controller's SPI mode and voltage levels.

Memory IC Part Context

This component belongs to the 25XX160 family of 16 Kbit Serial EEPROMs from Microchip Technology. It shares architectural similarities with the 25AA160 and 25LC160 but is distinguished by its specific voltage range and extended temperature capabilities. The device provides non-volatile storage accessible via standard serial protocols.

Memory IC Replacement Considerations

Microchip recommends using the 25AA160A/B or 25LC160A/B series for new designs instead of this legacy part number.

Memory IC FAQ

How does the HOLD pin function during serial communication?

The HOLD pin allows the user to pause transmission mid-sequence without resetting the address pointer. The SI, SCK, and SO pins enter a high-impedance state while held low, resuming normal operation when brought high while SCK is low.

What is the purpose of the Write Enable Latch (WEL)?

The WEL bit must be set via the WREN instruction before any write operation can occur. It resets automatically after power-up, successful execution of WRDI, WRSR, or WRITE instructions, ensuring writes do not happen inadvertently.