24CW640T-I/OT Microchip

24CW16X/24CW32X/24CW64X 2 16K-64K 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, MU I 24CW32X 32-Kbit 32-byte 1.6-5.5 SN, OT, ST, MU I 24CW64X 64-Kbit 32-byte 1.6-5.5 SN, OT, ST, MU, 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-Kbit EEPROM: 8-Lead SOIC/TSSOP - Internally organized as one (Top View) 5-Lead SOT23 2048/4096/8192 x 8 bit block (Top View) NC 1 8 VCC - Byte or page writes up to 32 bytes SCL 1 5 NC NC 7 NC 2 - Byte or sequential reads within a block VSS 2 - Self-timed write cycle (5 ms maximum) NC 3 6 SCL 2 High-Speed I C Interface: SDA 3 4 VCC Vss 5 SDA 4 - Industry standard: 1 MHz, 400 kHz and 100 kHz 8-Pad UDFN (Top View) - Output slope control to eliminate ground bounce NC 1 8 VCC - Schmitt trigger inputs for noise suppression 7 NC NC 2 Programmable Hardware Slave Address Bits: 6 SCL NC 3 - Configurable via the Hardware Address VSS 4 5 SDA Register (HAR) Versatile Data Protection Options: (1) (2) 4-Ball CSP (CS0) 4-Ball CSP (CS1) - Software write protection via the Write (Top View) (Top View) 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 0.4x0.4mm. - Standby Current: 1 A at 5.5V High Reliability: 2: CS1 CSP ball pitch is 0.5x0.4mm. - More than one million erase/write cycles - Data retention: >200 years Pin Function Table - ESD protection: >4000V RoHS Compliant Name Function VSS Ground Packages SDA Serial Data Pin 8-Lead SOIC, 8-Lead TSSOP, 8-Pad UDFN, SCL Serial Clock Input 5-Lead SOT-23 and Two 4-Ball CSP options CC Supply Voltage V 2017 Microchip Technology Inc. Preliminary DS20005772A-page 124CW16X/24CW32X/24CW64X The Write Protection Register (WPR) controls the valid Description address ranges of the EEPROM array that can be writ- The 24CW16X/24CW32X/24CW64X (24CW Series) ten. This allows the user to select the write protection devices provide 16-64 Kbits of Serial EEPROM utilizing behavior to be configured for software write protection. 2 an I C (2-wire) serial interface. The 24CW Series is The Hardware Address Register (HAR) controls the organized as 2048/4096/8192 bytes of 8 bits each three hardware slave address bits. These bits deter- (2-8 Kbytes). The 24CW Series is optimized for use in mine which device addresses the 24CW Series will consumer and industrial applications, where reliable and Acknowledge. Because the 24CW Series is a 4-pin dependable nonvolatile memory storage is essential. device, the cascadable feature is controlled by the The 24CW Series allows up to eight devices to share a 2 HAR. common I C (2-wire) bus and is capable of operation across a broad voltage range (1.6V to 5.5V). Once the desired software write protection and hardware slave address bits are set, these Configuration registers The 24CW Series contains a pair of programmable can be permanently locked, thereby preventing any Configuration registers which allow certain device further changes to the device operation. 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) R = VCC 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 24CWXXX 24CWXXX 24CWXXX VSS VSS VSS SCL SCL SCL VSS DS20005772A-page 2 Preliminary 2017 Microchip Technology Inc.