Specification	AT21CS01-MCHM10-B

Memory Depth	128
Memory Format	EEPROM
Memory Interface (Type)	®
Memory Interface Wire Count	1
Memory Size	1 Kbit
Memory Type	Non-Volatile
Memory Width	8 bit
Mounting Type	Surface Mount
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Package / Case	2-VDFN
Package Length	2 mm
Package Name	2-VSFN
Package Width	2.35 mm
Technology	EEPROM
Voltage - Supply (Maximum)	3.6 V
Voltage - Supply (Minimum)	1.7 V
Write Cycle Time - Page	150 µs
Write Cycle Time - Word	150 µs

AT21CS01 Series

Single-Wire 1-Kbit (128 x 8) Serial EEPROM with Factory-Programmed 64-Bit Serial Number

Part	Package Name	Memory Interface (Type)	Memory Type	Memory Size	Package / Case	Technology	Mounting Type	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)	Memory Depth	Memory Width	Operating Temperature (Min)	Operating Temperature (Max)	Write Cycle Time - Word	Write Cycle Time - Page	Clock Frequency	Memory Format	Package Width	Package Length	Memory Interface Wire Count
Microchip Technology AT21CS01-STUM11-T	SOT-23-3	I2C Single Wire	Non-Volatile	1 Kbit	SC-59 SOT-23-3 TO-236-3	EEPROM	Surface Mount	3.6 V	1.7 V	128	8 bit	-40 °C	85 °C	5 ms	5 ms	125 kbps	EEPROM
Microchip Technology AT21CS01-MCHM10-B	2-VSFN	®	Non-Volatile	1 Kbit	2-VDFN	EEPROM	Surface Mount	3.6 V	1.7 V	128	8 bit	-40 °C	85 °C	150 µs	150 µs		EEPROM	2.35 mm	2 mm	1
Microchip Technology AT21CS01-STUM13-T	SOT-23-3	I2C Single Wire	Non-Volatile	1 Kbit	SC-59 SOT-23-3 TO-236-3	EEPROM	Surface Mount	3.6 V	1.7 V	128	8 bit	-40 °C	85 °C	5 ms	5 ms	125 kbps	EEPROM
Microchip Technology AT21CS01-SSHM10-B	8-SOIC	I2C Single Wire	Non-Volatile	1 Kbit		EEPROM	Surface Mount	3.6 V	1.7 V	128	8 bit	-40 °C	85 °C	5 ms	5 ms	125 kbps	EEPROM	3.9 mm	0.154 in
Microchip Technology AT21CS01-STUM12-T	SOT-23-3	I2C Single Wire	Non-Volatile	1 Kbit	SC-59 SOT-23-3 TO-236-3	EEPROM	Surface Mount	3.6 V	1.7 V	128	8 bit	-40 °C	85 °C	5 ms	5 ms	125 kbps	EEPROM
Microchip Technology AT21CS01-MCHM10-T	2-VSFN	®	Non-Volatile	1 Kbit	2-VDFN	EEPROM	Surface Mount	3.6 V	1.7 V	128	8 bit	-40 °C	85 °C				EEPROM	2.35 mm	2 mm	1
Microchip Technology AT21CS01-STUM16-T	SOT-23-3	I2C Single Wire	Non-Volatile	1 Kbit	SC-59 SOT-23-3 TO-236-3	EEPROM	Surface Mount	3.6 V	1.7 V	128	8 bit	-40 °C	85 °C	5 ms	5 ms	125 kbps	EEPROM
Microchip Technology AT21CS01-SSHM16-T	8-SOIC	I2C Single Wire	Non-Volatile	1 Kbit		EEPROM	Surface Mount	3.6 V	1.7 V	128	8 bit	-40 °C	85 °C	5 ms	5 ms	125 kbps	EEPROM	3.9 mm	0.154 in
Microchip Technology AT21CS01-UUM0B-T	4-WLCSP	I2C Single Wire	Non-Volatile	1 Kbit	4-XFBGA WLCSP	EEPROM	Surface Mount	3.6 V	1.7 V	128	8 bit	-40 °C	85 °C	5 ms	5 ms	125 kbps	EEPROM
Microchip Technology AT21CS01-TOHM10-B	TO-92-3	I2C Single Wire	Non-Volatile	1 Kbit	TO-226-3 TO-92-3 (TO-226AA)	EEPROM	Through Hole	3.6 V	1.7 V	128	8 bit	-40 °C	85 °C	5 ms	5 ms	125 kbps	EEPROM