Document
www.DataSheet4U.com
Features
• Low-voltage and Standard-voltage Operation
– 1.8 (VCC = 1.8V to 3.6V) Internally Organized 65,536 x 8 Two-wire Serial Interface Schmitt Triggers, Filtered Inputs for Noise Suppression Bidirectional Data Transfer Protocol 1 MHz (3.6V), 400 kHz (1.8V) Compatibility Write Protect Pin for Hardware and Software Data Protection 128-byte Page Write Mode (Partial Page Writes Allowed) Self-timed Write Cycle (5 ms Max) High Reliability – Endurance: 1,000,000 Write Cycles – Data Retention: 40 Years • Lead-free/Halogen-free Devices Available • 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead TSSOP, 8-lead LAP and 8-lead SAP Packages • Die Sales: Wafer Form, Waffle Pack and Bumped Die
• • • • • • • • •
Two-wire Serial EEPROM
512K (65,536 x 8)
Description
The AT24C512B provides 524,288 bits of serial electrically erasable and programmable read only memory (EEPROM) organized as 65,536 words of 8 bits each. The device’s cascadable feature allows up to four devices to share a common two-wire bus. The device is optimized for use in many industrial and commercial applications where low-power and low-voltage operation are essential. The devices are available in space-saving 8-pin PDIP, 8-lead JEDEC SOIC, 8-lead TSSOP, 8-lead Leadless Array (LAP), and 8-lead SAP packages. In addition, the entire family is available in a 1.8V (1.8V to 3.6V) version.
AT24C512B
with Three Device Address Inputs
Preliminary
Table 1. Pin Configurations
Pin Name A0–A2 SDA SCL WP NC Function Address Inputs Serial Data Serial Clock Input Write Protect No Connect
A0 A1 A2 GND
8-lead TSSOP
1 2 3 4 8 7 6 5 VCC WP SCL SDA
A0 A1 A2 GND
8-lead PDIP
1 2 3 4 8 7 6 5 VCC WP SCL SDA
8-lead SOIC
A0 A1 A2 GND 1 2 3 4 8 7 6 5 VCC WP SCL SDA
8-lead Leadless Array
VCC WP SCL SDA 8 7 6 5 1 2 3 4 A0 A1 A2 GND VCC WP SCL SDA
8-lead SAP
8 7 6 5 1 2 3 4 A0 A1 A2 GND
Bottom View
Bottom View
Rev. 5112A–SEEPR–8/05
1
Absolute Maximum Ratings*
Operating Temperature..................................–55°C to +125°C Storage Temperature .....................................–65°C to +150°C Voltage on Any Pin with Respect to Ground .................................... –1.0V to +7.0V Maximum Operating Voltage ............................................ 4.3V DC Output Current........................................................ 3.0 mA *NOTICE: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Figure 1. Block Diagram
2
AT24C512B [Preliminary]
5112A–SEEPR–8/05
AT24C512B [Preliminary]
Pin Description
SERIAL CLOCK (SCL): The SCL input is used to positive edge clock data into each EEPROM device and negative edge clock data out of each device. SERIAL.