34VL02/ST

Overview

The Microchip Technology 34VL02/ST is a 2 Kbit (256 x 8-bit) serial EEPROM featuring an I²C-compatible 2-wire interface. It operates on a single supply voltage ranging from 1.5V to 3.6V, with typical standby current of 100 nA and read current of 1 mA. The device supports clock frequencies up to 400 kHz at VCC ≥ 1.8V and includes a 16-byte page write buffer. It offers permanent and resettable software write protection for the lower half of the array, alongside hardware write protection via the WP pin.

Feature Summary

• Provides permanent and resettable software write protection for the lower half of the memory array
• Features hardware write protection capability for the entire array through the dedicated WP pin
• Supports cascading up to eight devices on the same bus using chip select inputs
• Includes Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce

Applications

• Low-power embedded systems requiring non-volatile data storage
• Battery-operated devices utilizing low standby current modes
• Industrial applications needing robust noise immunity on serial buses
• Systems requiring specific memory sectors to be permanently locked against modification

Procurement Notes

Verify that the ordering suffix corresponds to the TSSOP package type, as the base part number covers multiple form factors. Confirm the temperature grade matches the application requirements, specifically checking for industrial range availability. Ensure the component is RoHS compliant if required by your manufacturing standards. Cross-reference the datasheet revision to confirm feature consistency regarding write protection commands.

Selection Notes

Select this component when a small capacity EEPROM with flexible write protection schemes is needed. It is suitable for designs operating below 2.5V where standard EEPROMs may not function reliably. Consider the 16-byte page buffer for efficient data writing in burst mode. Evaluate the need for permanent versus resettable protection to determine if the software features meet security requirements without additional hardware logic.

Part Context

The 34VL02 belongs to Microchip's 34XX series of serial EEPROMs designed for I²C communication. It shares architectural similarities with other members like the 34LC02 but distinguishes itself through its extended low-voltage operation down to 1.5V. This family is commonly used in consumer electronics and industrial controls where space-constrained surface mount packages are preferred.

Replacement Considerations

Check for 34LC02 variants if higher voltage tolerance is acceptable. Verify compatibility with 24XX02 series if pinout differences are manageable. Ensure substitute parts support the same 1.5V minimum operating voltage and I²C timing specifications.