24CW640T-I/CS0668

The 24CW16X/24CW32X/24CW64X/24CW128X (24CW Series) devices provide 16-128 Kbits of Serial EEPROM utilizing an I²C (2-wire) serial interface. The 24CW Series is organized as 2048/4096/8192/16384 bytes of 8 bits each (2-16 Kbytes). The 24CW Series is optimized for use in consumer and industrial applications, where reliable and dependable nonvolatile memory storage is essential. The 24CW Series allows up to eight devices to share a common I²C (2-wire) bus and is capable of operation across a broad voltage range (1.6V to 5.5V). The 24Cw Series contains a pair of programmable Configuration registers which allow certain device behaviors to be modified. These registers are the Write Protection Register and the Hardware Address Register. The Write Protection Register (WPR) controls the valid address ranges of the EEPROM array that can be written. This allows the user to select the write protection behavior to be configured for software write protection. The Hardware Address Register (HAR) controls the three hardware slave address bits. These bits determine which device addresses the 24CW Series will Acknowledge. Because the 24CW Series is a 4-pin device, the cascadable feature is controlled by the HAR. Once the desired software write protection and hardware slave address bits are set, these Configuration registers can be permanently locked, thereby preventing any further changes to the device operation.

Key features

• 16/32/64/128-Kbit EEPROM
• Internally organized as one 2048/4096/8192/16384 x 8 bit block
• Byte or page writes up to 32 bytes
• Byte or sequential reads within a block
• Self-timed write cycle (5 ms maximum)
• High-Speed I²C Interface
• Industry standard: 1 MHz, 400 kHz and 100 kHz
• Output slope control to eliminate ground bounce
• Schmitt trigger inputs for noise suppression
• Programmable Hardware Slave Address Bits
• Configurable via the Hardware Address Register (HAR)
• Versatile Data Protection Options
• Software write protection via the Write Protection Register (WPR)
• Operating Voltage Range of 1.6V to 5.5V
• Low-Power CMOS Technology
• Write current: 1.0 mA maximum at 5.5V
• Read current: 1.0 mA maximum at 5.5V, 1 MHz
• Standby Current: 1 μA at 5.5V
• High Reliability
• More than one million erase/write cycles
• Data retention: > 200 years
• ESD protection: > 4000 V
• RoHS Compliant