The 24AA512T-I/SN from Microchip Technology is a 512-Kbit I²C-compatible serial EEPROM organized as 64K × 8 bits, providing 65,536 bytes or 64KB of nonvolatile storage. Its two-wire serial interface requires only SCL and SDA communication lines, making it suitable for embedded systems with limited MCU pins and PCB space.
The 24AA512 operates from a wide 1.7V to 5.5V supply range. Maximum I²C clock frequency is 400kHz at VCC ≥2.5V and 100kHz when VCC is below 2.5V, supporting common 1.8V, 3.3V, and 5V digital platforms.
The device provides a 128-byte page-write buffer, allowing up to 128 bytes to be programmed during one page-write operation. Maximum page-write cycle time is 5ms, and both random and sequential read operations are supported across the entire 512-Kbit memory array.
A dedicated WP hardware write-protect input helps protect stored configuration or calibration data against unintended writes. Three hardware address inputs, A0 through A2, allow up to eight devices on the same I²C bus, providing as much as 4Mbit of addressable EEPROM using multiple devices.
Low-power CMOS technology provides a maximum read current of 400μA and a maximum industrial-temperature standby current of 1μA, making the device suitable for portable and battery-powered systems.
Memory reliability is specified at more than one million erase/write cycles with more than 200 years of data retention. Additional features include Schmitt-trigger inputs for noise suppression, controlled output slew rate, and ESD protection above 4000V.
In the complete ordering code 24AA512T-I/SN, “I” specifies the −40°C to +85°C industrial-temperature range, “SN” identifies the 8-lead narrow SOIC package, and the tape-and-reel orderable version is listed by Microchip as 24AA512T-I/SN. The 24AA512 family is currently classified as In Production.
The SN package has an approximately 4.90mm × 3.90mm molded body, 6.00mm overall width, 1.75mm maximum height, and 1.27mm lead pitch.
Key Specifications
- Manufacturer: Microchip Technology
- Manufacturer Part Number: 24AA512T-I/SN
- Product Family: 24AA512
- Device Type: Serial EEPROM
- Memory Density: 512 Kbit
- Byte Capacity: 64KB
- Organization: 64K × 8 Bits
- Memory Type: Nonvolatile EEPROM
- Interface: I²C-Compatible Two-Wire
- Maximum I²C Clock: 400kHz
- Maximum Clock Below 2.5V: 100kHz
- Operating Voltage: 1.7V to 5.5V
- Page Size: 128 Bytes
- Maximum Page Write Time: 5ms
- Random Read: Supported
- Sequential Read: Supported
- Hardware Write Protect: Yes
- Address Inputs: A0, A1, A2
- Maximum Devices per Bus: 8
- Maximum Read Current: 400μA
- Maximum Standby Current: 1μA, Industrial Grade
- Endurance: More Than 1,000,000 Erase/Write Cycles
- Data Retention: More Than 200 Years
- ESD Protection: Greater Than 4000V
- Input Type: Schmitt Trigger
- Temperature Grade: Industrial
- Operating Temperature: −40°C to +85°C
- Package: SOIC-8
- Microchip Package Code: SN
- Package Body: Approximately 4.90 × 3.90mm
- Overall Width: Approximately 6.00mm
- Maximum Height: 1.75mm
- Lead Pitch: 1.27mm
- Lead Count: 8
- Mounting Type: Surface Mount
- Packaging: Tape and Reel
- RoHS: Compliant
- Product Status: In Production
Pin Functions
- Pin 1 — A0: Device Address Input
- Pin 2 — A1: Device Address Input
- Pin 3 — A2: Device Address Input
- Pin 4 — VSS: Ground
- Pin 5 — SDA: Serial Data
- Pin 6 — SCL: Serial Clock
- Pin 7 — WP: Hardware Write Protect
- Pin 8 — VCC: Supply Voltage
Typical Applications
Suitable for MCU parameter storage, configuration data, calibration values, serial numbers, user settings, industrial controls, data-acquisition systems, smart instrumentation, consumer electronics, and embedded systems requiring long-term nonvolatile data retention.
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