Features Low-voltage and Standard-voltage Operation 1.8(V =1.8Vto5.5V) CC Internally Organized 128 x 8 (1K) Two-wire Serial Interface Schmitt Trigger, Filtered Inputs for Noise Suppression Bidirectional Data Transfer Protocol 1 MHz (5V), 400 kHz (1.8V, 2.5V, 2.7V) Compatibility Write Protect Pin for Hardware Data Protection Two-wire 8-byte Page (1K) Write Modes Partial Page Writes Allowed Serial EEPROM Self-timed Write Cycle (5 ms max) High-reliability 1K (128 x 8) Endurance: 1 Million Write Cycles Data Retention: 100 Years 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead Ultra Thin Mini-MAP (MLP 2x3), 5-lead SOT23, 8-lead TSSOP and 8-ball dBGA2 Packages Lead-free/Halogen-free AT24C01B Die Sales: Wafer Form and Tape and Reel Description Not Recommended The AT24C01B provides 1024 bits of serial electrically erasable and programmable for New Design. read-only memory (EEPROM) organized as 128 words of 8 bits each. The device is Replaced by AT24C01C. optimized for use in many industrial and commercial applications where low-power and low-voltage operation are essential. The AT24C01B is available in space-saving 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead Ultra Thin Mini-MAP (MLP 2x3), 5-lead SOT23, 8-lead TSSOP, and 8-ball dBGA2 packages and is accessed via a Two-wire serial interface. In addition, the AT24C01B is available in 1.8V (1.8V to 5.5V) version. Table 0-1. Pin Configuration 8-lead Ultra Thin Mini-MAP (MLP 2x3) 8-ball dBGA2 Pin Name Function VCC 8 1 A0 8 1 VCC A0 A0 - A2 Address Inputs WP 7 2 A1 7 2 WP A1 SCL 6 3 A2 SCL 6 3 A2 SDA Serial Data SDA 5 4 GND SDA 5 4 GND SCL Serial Clock Input Bottom View Bottom View WP Write Protect 8-lead TSSOP 8-lead SOIC A0 1 8 VCC A0 1 8 VCC GND Ground A1 2 7 WP A1 2 7 WP VCC Power Supply A2 3 6 SCL A2 3 6 SCL GND 4 5 SDA GND 4 5 SDA Note: For use of 5-lead SOT23, the soft- 8-lead PDIP 5-lead SOT23 ware A2, A1, and A0 bits in the A0 1 8 VCC WP SCL 1 5 device address word must be set 7 WP A1 2 GND 2 to zero to properly communicate. 6 SCL A2 3 SDA 3 4 VCC 5 SDA GND 4 5156ESEEPR10/08Absolute Maximum Ratings *NOTICE: Stresses beyond those listed under Absolute Operating Temperature ................................ 55 C to +125C Maximum Ratings may cause permanent dam- age to the device. This is a stress rating only and Storage Temperature.................................... 65C to +150C functional operation of the device at these or any Voltage on Any Pin other conditions beyond those indicated in the with Respect to Ground ....................................1.0V to +7.0V operational sections of this specification is not implied. Exposure to absolute maximum rating Maximum Operating Voltage .......................................... 6.25V conditions for extended periods may affect device reliability. DC Output Current........................................................ 5.0 mA Figure 0-1. Block Diagram VCC GND WP START SCL STOP SDA LOGIC SERIAL EN H.V. PUMP/TIMING CONTROL LOGIC LOAD COMP DATA RECOVERY DEVICE ADDRESS LOAD INC COMPARATOR A 2 A R/W 1 DATA WORD EEPROM A 0 ADDR/COUNTER Y DEC SERIAL MUX D /ACK D OUT IN LOGIC D OUT 2 AT24C01B 5156ESEEPR10/08 X DEC