Features Low-voltage and Standard-voltage Operation 1.8v (V =1.8Vto3.6V) CC 2.5v (V =2.5Vto5.5V) CC Internally Organized 65,536 x 8 Two-wire Serial Interface Schmitt Triggers, Filtered Inputs for Noise Suppression Bidirectional Data Transfer Protocol 1 MHz (2.5V, 5.5V), 400 kHz (1.8V) Compatibility Two-wire Serial Write Protect Pin for Hardware and Software Data Protection 128-byte Page Write Mode (Partial Page Writes Allowed) EEPROM Self-timed Write Cycle (5 ms Max) High Reliability 512K (65,536 x 8) Endurance: 1,000,000 Write Cycles Data Retention: 40 Years Lead-free/Halogen-free Devices 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ SOIC, 8-lead TSSOP, 8-ball dBGA2, and AT24C512B 8-lead Ultra Thin Small Array (SAP) Packages with Three Device Address Inputs Die Sales: Wafer Form, Waffle Pack and Bumped Die Description The AT24C512B provides 524,288 bits of serial electrically erasable and programma- Not Recommended ble read only memory (EEPROM) organized as 65,536 words of 8 bits each. The for New Design. devices cascadable feature allows up to eight devices to share a common two-wire bus. The device is optimized for use in many industrial and commercial applications Replaced by where low-power and low-voltage operation are essential. The devices are available AT24C512C. in space-saving 8-pin PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ SOIC, 8-lead TSSOP, 8-ball dBGA2 and 8-lead Ultra Thin SAP packages. In addition, the entire family is available in 1.8V (1.8V to 3.6V) and 2.5V (2.5V to 5.5V) versions. Table 0-1. Pin Configurations Pin Name Function 8-lead TSSOP 8-lead PDIP A0A2 Address Inputs SDA Serial Data A0 1 8 VCC A0 1 8 VCC A1 2 7 WP SCL Serial Clock Input A1 2 7 WP A2 3 6 SCL A2 3 6 SCL WP Write Protect GND 4 5 SDA GND 4 5 SDA 8-lead SOIC 8-lead Ultra Thin SAP 8-ball dBGA2 VCC 8 1 A0 VCC 8 1 A0 A0 1 8 VCC WP 7 2 A1 WP 7 2 A1 A1 2 7 WP SCL 6 3 A2 SCL 6 3 A2 A2 3 6 SCL SDA 5 4 GND SDA 5 4 GND GND 4 5 SDA Bottom View Bottom View Rev. 5297ASEEPR1/08Absolute 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 ADDR/COUNTER 0 SERIAL MUX Y DEC D /ACK D OUT IN LOGIC D OUT 2 AT24C512B 5297ASEEPR1/08 X DEC