Clock Frequency is 2.1MHz - Memory Distributor - AT25128N-10SI-1.8 AT25256W-10SI-1.8 AT25P1024C1-10CI-2.7

Part Number	Manufacturer / Brand	Brife Description	Part Status	Memory Type	Memory Format	Technology	Memory Size	Clock Frequency	Write Cycle Time - Word, Page	Access Time	Memory Interface	Voltage - Supply	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package
AT25128N-10SI-1.8	Microchip Technology	IC EEPROM 128K SPI 2.1MHZ 8SOIC	Obsolete	Non-Volatile	EEPROM	EEPROM	128Kb (16K x 8)	2.1MHz	10ms	-	SPI	1.8 V ~ 3.6 V	-40°C ~ 85°C (TA)	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
AT25256W-10SI-1.8	Microchip Technology	IC EEPROM 256K SPI 2.1MHZ 8SOIC	Obsolete	Non-Volatile	EEPROM	EEPROM	256Kb (32K x 8)	2.1MHz	10ms	-	SPI	1.8 V ~ 3.6 V	-40°C ~ 85°C (TA)	Surface Mount	8-SOIC (0.209", 5.30mm Width)	8-SOIC
AT25P1024C1-10CI-2.7	Microchip Technology	IC EEPROM 1M SPI 2.1MHZ 8LAP	Obsolete	Non-Volatile	EEPROM	EEPROM	1Mb (128K x 8)	2.1MHz	5ms	-	SPI	2.7 V ~ 5.5 V	-40°C ~ 85°C (TC)	Surface Mount	8-TDFN	8-LAP (5x8)
AT25P1024W1-10SI-2.7	Microchip Technology	IC EEPROM 1M SPI 2.1MHZ 20SOIC	Obsolete	Non-Volatile	EEPROM	EEPROM	1Mb (128K x 8)	2.1MHz	5ms	-	SPI	2.7 V ~ 5.5 V	-40°C ~ 85°C (TC)	Surface Mount	20-SOIC (0.295", 7.50mm Width)	20-SOIC