The Microchip AT24C01C-PUM is a 1Kbit serial EEPROM with an I²C interface, organized as 128 x 8 bits. It is a non-volatile memory device intended for parameter storage, calibration data, configuration bytes, and small lookup tables in embedded systems. With a 1 MHz clock rate and 550 ns access time, it keeps up with the I²C bus without stretching the SCL line on reads.
Supply range and 1.8V operation — confirmed
The AT24C01C-PUM operates from 1.7V to 5.5V, which directly answers the question of 1.8V support. At 1.8V the device is fully functional, including the full 1 MHz I²C clock speed, though the write cycle time remains 5 ms per word or page. This wide supply range also covers 2.5V, 3.3V, and 5V rails, so the same part can be used across a multi-voltage board without a separate level translator on the memory bus.
Active lifecycle — no obsolescence signal
The ROHS3 compliance is also confirmed, so no exemption expiry concerns.
Sourcing posture
For a through-hole serial EEPROM that is still active, the supply channel is stable — no allocation pressure or last-time-buy scramble expected.