24CW16X/24CW32X/24CW64X/24CW128X 2 16K-128K I C Serial EEPROM with Software Write Protection Family Data Sheet Device Selection Table Part Number Density Page Size VCC Range Package Temp. Ranges 24CW16X 16-Kbit 32-byte 1.6-5.5 SN, OT, ST, MUY I 24CW32X 32-Kbit 32-byte 1.6-5.5 SN, OT, ST, MUY I 24CW64X 64-Kbit 32-byte 1.6-5.5 SN, OT, ST, MUY, CS0, CS1 I 24CW128X 128-Kbit 32-byte 1.6-5.5 SN, OT, ST, MUY, CS0, CS1 I Note: X in the part number refers to the preset hardware slave address. Refer to Table 3-2 for additional information. Features Package Types (not to scale) 16/32/64/128-Kbit EEPROM: 8-Lead SOIC/TSSOP (Top View) - Internally organized as one 5-Lead SOT23 2048/4096/8192/16384 x 8 bit block (Top View) NC 8 VCC 1 - Byte or page writes up to 32 bytes SCL 1 5 NC NC 2 7 NC - Byte or sequential reads within a block VSS 2 NC 6 SCL 3 - Self-timed write cycle (5 ms maximum) SDA 3 4 2 VCC Vss 4 5 SDA High-Speed I C Interface: - Industry standard: 1 MHz, 400 kHz and 8-Pad UDFN 100 kHz (Top View) - Output slope control to eliminate ground NC 1 8 VCC bounce 7 NC NC 2 - Schmitt trigger inputs for noise suppression 6 NC 3 SCL Programmable Hardware Slave Address Bits: VSS 4 5 SDA - Configurable via the Hardware Address Register (HAR) (1) (2) 4-Ball CSP (CS0) 4-Ball CSP (CS1) Versatile Data Protection Options: (Top View) (Top View) - Software write protection via the Write Protection Register (WPR) Operating Voltage Range of 1.6V to 5.5V VVCCCC VSS VVCCCC SCL Low-Power CMOS Technology: - Write current: 1.0 mA maximum at 5.5V SCSCLL SDA SSDDAA VSS - Read current: 1.0 mA maximum at 5.5V, 1MHz Note 1: CS0 CSP ball pitch is 0.4x0.4 mm. - Standby Current: 1 A at 5.5V 2: CS1 CSP ball pitch is 0.5x0.4 mm. High Reliability: - More than one million erase/write cycles Pin Function Table - Data retention: >200 years - ESD protection: >4000V Name Function RoHS Compliant VSS Ground SDA Serial Data Pin Packages SCL Serial Clock Input 8-Lead SOIC, 8-Lead TSSOP, 8-Pad UDFN, VCC Supply Voltage 5-Lead SOT-23 and Two 4-Ball CSP options 2018 Microchip Technology Inc. DS20005772B-page 124CW16X/24CW32X/24CW64X/24CW128X The Write Protection Register (WPR) controls the valid Description address ranges of the EEPROM array that can be writ- The 24CW16X/24CW32X/24CW64X/24CW128X ten. This allows the user to select the write protection (24CW Series) devices provide 16-128 Kbits of Serial behavior to be configured for software write protection. 2 EEPROM utilizing an I C (2-wire) serial interface. The The Hardware Address Register (HAR) controls the 24CW Series is organized as 2048/4096/8192/16384 three hardware slave address bits. These bits deter- bytes of 8 bits each (2-16 Kbytes). The 24CW Series is mine which device addresses the 24CW Series will optimized for use in consumer and industrial applica- Acknowledge. Because the 24CW Series is a 4-pin tions, where reliable and dependable nonvolatile mem- device, the cascadable feature is controlled by the ory storage is essential. The 24CW Series allows up to 2 HAR. eight devices to share a common I C (2-wire) bus and is capable of operation across a broad voltage range (1.6V Once the desired software write protection and hardware to 5.5V). slave address bits are set, these Configuration registers can be permanently locked, thereby preventing any The 24CW Series contains a pair of programmable further changes to the device operation. Configuration registers which allow certain device behaviors to be modified. These registers are the Write Protection Register and the Hardware Address Register. System Configuration Using Serial EEPROMs VCC t R(max) R = PUP(max) 0.8473 CL VCC VOL (max) VCC R = PUP(min) IOL SCL SDA 2 I C MCU VCC VCC VCC Programmed Programmed Programmed as Slave 0 as Slave 1 as Slave 7 SDA SDA SDA 24CWXXXX 24CWXXXX 24CWXXXX VSS VSS VSS SCL SCL SCL VSS 2018 Microchip Technology Inc. DS20005772B-page 2