Specification	24CS256T-I/Q4B

Access Time	70 ns
Clock Frequency	3.4 MHz
Memory Format	EEPROM
Memory Interface	I2C
Memory Organization	32K x 8
Memory Size	32 KB
Memory Type	Non-Volatile
Mounting Type	Surface Mount
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Package / Case	8-UFDFN Exposed Pad
Supplier Device Package	8-UDFN (2x3)
Technology	EEPROM
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	1.7 V
Write Cycle Time - Word, Page	5 ms

24CS256 Series

256-Kbit 3.4MHz I2C Serial EEPROM with 128-Bit Serial Number and Enhanced Software Write Protection

Part	Memory Format	Voltage - Supply [Max]	Voltage - Supply [Min]	Memory Organization	Mounting Type	Access Time	Memory Type	Technology	Package / Case	Package / Case [custom]	Package / Case	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Memory Size	Write Cycle Time - Word, Page	Memory Interface	Package / Case [y]	Package / Case [x]	Clock Frequency
Microchip Technology 24CS256T-E/MS66KVAO	EEPROM	5.5 V	1.7 V	32K x 8	Surface Mount	400 ns	Non-Volatile	EEPROM	8-MSOP 8-TSSOP	0.118 in	3 mm	-40 °C	125 °C	8-MSOP	32 KB	5 ms	I2C
Microchip Technology 24CS256T-E/Q4B	EEPROM	5.5 V	1.7 V	32K x 8	Surface Mount	400 ns	Non-Volatile	EEPROM	8-UFDFN Exposed Pad			-40 °C	125 °C	8-UDFN (2x3)	32 KB	5 ms	I2C
Microchip Technology 24CS256T-E/Q4B66KVAO	EEPROM	5.5 V	1.7 V	32K x 8	Surface Mount	400 ns	Non-Volatile	EEPROM	8-UFDFN Exposed Pad			-40 °C	125 °C	8-UDFN (2x3)	32 KB	5 ms	I2C
Microchip Technology 24CS256-E/SN66KVAO	EEPROM	5.5 V	1.7 V	32K x 8	Surface Mount	400 ns	Non-Volatile	EEPROM	8-SOIC			-40 °C	125 °C	8-SOIC	32 KB	5 ms	I2C	3.9 mm	0.154 in
Microchip Technology 24CS256T-I/Q4B	EEPROM	5.5 V	1.7 V	32K x 8	Surface Mount	70 ns	Non-Volatile	EEPROM	8-UFDFN Exposed Pad			-40 °C	85 °C	8-UDFN (2x3)	32 KB	5 ms	I2C			3.4 MHz
Microchip Technology 24CS256-I/MS	EEPROM	5.5 V	1.7 V	32K x 8	Surface Mount	70 ns	Non-Volatile	EEPROM	8-MSOP 8-TSSOP	0.118 in	3 mm	-40 °C	85 °C	8-MSOP	32 KB	5 ms	I2C			3.4 MHz
Microchip Technology 24CS256-E/SM	EEPROM	5.5 V	1.7 V	32K x 8	Surface Mount	400 ns	Non-Volatile	EEPROM	8-SOIC			-40 °C	125 °C	8-SOIJ	32 KB	5 ms	I2C	5.3 mm	0.209 "
Microchip Technology 24CS256T-E/MS	EEPROM	5.5 V	1.7 V	32K x 8	Surface Mount	400 ns	Non-Volatile	EEPROM	8-MSOP 8-TSSOP	0.118 in	3 mm	-40 °C	125 °C	8-MSOP	32 KB	5 ms	I2C
Microchip Technology 24CS256T-I/CS0668	EEPROM														32 KB
Microchip Technology 24CS256-I/SM	EEPROM	5.5 V	1.7 V	32K x 8	Surface Mount	70 ns	Non-Volatile	EEPROM	8-SOIC			-40 °C	85 °C	8-SOIJ	32 KB	5 ms	I2C	5.3 mm	0.209 "	3.4 MHz

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tape & Reel (TR)	5000	$ 0.82
Microchip Direct	T/R	1	$ 0.86
		25	$ 0.83
		100	$ 0.80
		1000	$ 0.76
		5000	$ 0.71
Newark	Each (Supplied on Full Reel)	100	$ 0.80

Description

General part information

24CS256 Series

The Microchip Technology Inc. 24CS256 is a 256Kb (32K x 8) I2C Serial Electrically Erasable PROM (EEPROM), capable of speeds up to 3.4Mhz and operation across a broad voltage range (1.7V to 5.5V). This device also has a page write capability of up to 64 bytes of data. This device is capable of both random and sequential reads up to the 256K boundary. Functional address lines allow up to eight devices on the same bus, for up to 2 Mbit address space. This device is available in PDIP-8, SOIC-8, SOIJ-8, UDFN-8, SOT-23-5, TSSOP-8, MSOP-8 and WLCSP-8 packages.

Documents

Technical documentation and resources

Datasheet

Using C and a Hardware Module to Interface 8051 MCUs with I2C Serial EEPROMs

Application Notes

Utilizing Enhanced Software Write Protection in 24CS Series Serial EEPROMs

Application Notes

Using the C18 Compiler and the MSSP to Interface I2C? EEPROMs with PIC18 Devices

Application Notes

Interfacing I2C? Serial EEPROMs to PIC18 Devices

Application Notes

Using the MSSP Module to Interface I2C? Serial EEPROMs with PIC16 Devices

Application Notes