25CS640 Series

with ECC, 128-Bit Serial Number and Enhanced Write Protection

Catalog

with ECC, 128-Bit Serial Number and Enhanced Write Protection

Part	Voltage - Supply [Min]	Voltage - Supply [Max]	Memory Type	Memory Format	Write Cycle Time - Word, Page	Access Time	Clock Frequency	Memory Interface	Operating Temperature [Min]	Operating Temperature [Max]	Technology	Memory Organization	Memory Size	Supplier Device Package	Package / Case	Mounting Type	Package / Case [y]	Package / Case [x]
Microchip Technology 25CS640T-E/MWF36KVAO	1.8 V	5.5 V	Non-Volatile	EEPROM	4 ms	20 ns	20 MHz	SPI	-40 °C	125 °C	EEPROM	8 K	64 Kbit
Microchip Technology 25CS640T-E/Q4B	1.8 V	5.5 V	Non-Volatile	EEPROM	4 ms	20 ns	20 MHz	SPI	-40 °C	125 °C	EEPROM	8 K	64 Kbit	8-UDFN (2x3)	8-UFDFN Exposed Pad	Surface Mount
Microchip Technology 25CS640-H/SN	2.5 V	5.5 V	Non-Volatile	EEPROM	4 ms	40 ns	10 MHz	SPI	-40 °C	150 °C	EEPROM	8 K	64 Kbit	8-SOIC	8-SOIC	Surface Mount	3.9 mm	0.154 in
Microchip Technology 25CS640T-I/Q4B	1.7 V	5.5 V	Non-Volatile	EEPROM	4 ms	20 ns	20 MHz	SPI	-40 °C	85 °C	EEPROM	8 K	64 Kbit	8-UDFN (2x3)	8-UFDFN Exposed Pad	Surface Mount

Catalog

with ECC, 128-Bit Serial Number and Enhanced Write Protection

Key Features

• 8192 x 8-bit (64 Kbit)

•

• Serial Peripheral Interface (SPI) Compatible* 1.7V to 5.5V operation up to 20 MHz clock frequency

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• Build-in Error Correction Code (ECC) Logic* ECC Status bit via Status Register

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• User configurable Undervoltage Lockout (UVLO) Detection

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• Security Register* Pre-programmed 128-bit serial number

• * 32-byte user-programmable lockable ID page

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• Write Protection Modes:* Legacy Write Protection Mode: Protect 1/4, 1/2 or Entire Array

• * Enhanced Write Protection Mode: User-definable memory partitions and protection behavior

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• Reliability* More than 1 million erase/write cycles

• * Data retention > 200 years

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• Automotive AECQ-100 Qualified

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• Temperature Ranges Available* Industrial (I): -40°C to 85°C

• * Extended (E): -40°C to +125°C

• * Extended (H): -40°C to +150°C

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• Available in standard packages including 8-lead SOIC, 8-lead MSOP, 8-lead TSSOP and 8-lead 2x3 TDFN

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• Factory Programming Available

Description

The 25CS640 is a 64 Kbit (8 Kbytes) Serial EEPROM utilizing the industry standard Serial Peripheral Interface (SPI) compatible serial bus. Microchip's 25CS SPI Serial EEPROM Family offers additional features such as Built-in Error Correction Code (ECC) logic, Undervoltage Lockout (UVLO) detection, 128-bit Serial Number and Enhanced Write Protection to optimized for use in consumer electronics, industrial, medical, and automotive applications where reliable and dependable nonvolatile memory storage is essential. The EEPROM is available in a variety of space-saving packaging options.