25LC128-E/SN16KVAO

Overview

The Microchip Technology 25LC128-E/SN16KVAO is a 128 Kbit Serial Electrically Erasable PROM accessed via an SPI-compatible serial bus. It features a 16,384 x 8-bit organization with a 64-byte page size. The device 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. It is qualified to AEC-Q100 standards for automotive applications and functions across an extended temperature range from -40°C to +125°C.

Feature Summary

• Supports high-speed SPI communication with a maximum clock frequency of 10 MHz.
• Includes built-in write protection mechanisms such as power-on/off data protection and a dedicated write-protect pin.
• Offers block write protection allowing selection of none, one-quarter, one-half, or all array segments.
• Features self-timed erase and write cycles with a maximum duration of 5 ms.

Applications

• Automotive electronic systems requiring AEC-Q100 qualified non-volatile memory
• Industrial control systems operating in extended temperature environments
• Microcontroller-based data logging applications
• Configuration storage for embedded devices

Procurement Notes

Verify the specific suffix '16KVAO' against official Microchip documentation to confirm its exact meaning regarding packaging or lot traceability, as standard datasheets may not explicitly define this custom suffix. Ensure the component matches the Extended temperature grade (-40°C to +125°C) and SOIC-8 package requirements for your design. Cross-reference the manufacturer part number with authorized distributors to confirm current availability and authenticity.

Selection Notes

Select this component when an SPI interface EEPROM is required for automotive or industrial applications demanding extended temperature operation. It is suitable for designs needing 128 Kbit of non-volatile storage with hardware write protection capabilities. Compare it against the Industrial grade variant if the application does not require the full -40°C to +125°C range, or against the 25AA128 if lower voltage operation down to 1.8V is necessary.

Part Context

This part belongs to the 25LC128 family of 128 Kbit SPI Serial EEPROMs manufactured by Microchip Technology. The 'E' designation indicates the Extended temperature grade, while 'SN' specifies the 8-Lead SOIC package. The '16KVAO' suffix likely denotes specific manufacturing or packaging attributes defined by the manufacturer. This series is designed for direct interfacing with microcontrollers supporting the SPI protocol.

Replacement Considerations

25LC128-E/SN

FAQ

What is the function of the HOLD pin?

The HOLD pin allows the user to suspend serial communication without resetting the sequence. When pulled low while SCK is low, it pauses data transfer, tri-stating the SO line until the pin is released.

How is the write enable latch managed?

The write enable latch must be set using the WREN instruction before any write operation can occur. It is automatically reset after power-up, a successful WRDI instruction, or the completion of a write cycle.