Microchip Technology AT24C512-10TU-1.8

Overview

AT24C512-10TU-1.8 from Microchip Technology (formerly Atmel) is a 512 Kbit (65,536 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems. It operates from 1.8 V to 3.6 V, supports up to 100 kHz I²C bus speed at 1.8 V, features hardware write protection via the WP pin, and delivers 100,000 write cycles with 40-year data retention - used in industrial sensor calibration storage and firmware parameter backup.

For engineers reviewing the AT24C512-10TU-1.8 datasheet, AT24C512-10TU-1.8 pinout, AT24C512-10TU-1.8 application, or AT24C512-10TU-1.8 equivalent, key selection considerations include its 1.8 V operation range, 128-byte page write capability, TSSOP-8 package with lead-free/halogen-free compliance, and support for cascaded multi-device I²C buses up to four units.

Technical Context

The AT24C512-10TU-1.8 implements a standard two-wire (I²C-compatible) interface with open-drain SDA and edge-triggered SCL, supporting device addressing via A0/A1 pins for up to four devices on one bus. Its internal architecture organizes memory as 512 pages of 128 bytes each, enabling partial-page writes and automatic address incrementing during sequential access.

It uses Schmitt-trigger inputs with noise filtering on SCL/SDA, supports acknowledge polling during write cycles, and enforces hardware write protection when WP is tied high. The device enters low-power standby mode after STOP condition receipt or power-up, drawing only 1.0 µA at 1.8 V.

Key Specifications

Pinout & Package

AT24C512-10TU-1.8 is packaged in an 8-lead TSSOP (8A2) with 0.65 mm pitch, 3.0 mm × 6.4 mm body, and lead-free/halogen-free construction per RoHS.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with AT24C512-10TU-1.8, AT24C512-10TQ-1.8 requires PCB redesign due to incompatible packaging, while M24512-RMN6TP offers higher I²C speed but demands validation of write-cycle timing and noise immunity in target application.

Availability

AT24C512-10TU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration storage, medical device configuration backup, and automotive body control module NVRAM requiring stable component supply across extended product lifecycles.

Supply support for AT24C512-10TU-1.8 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with broad industrial and automotive qualification capabilities.

The AT24C512-10TU-1.8 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for reliable, low-voltage, I²C-based parameter and configuration storage in space- and power-constrained embedded systems.

FAQ

What is the maximum I²C clock frequency supported by AT24C512-10TU-1.8 at 1.8 V?

The AT24C512-10TU-1.8 supports a maximum I²C clock frequency of 100 kHz when operating at 1.8 V. This is specified in Table 4 of the datasheet under "1.8 Volt" column for parameter fSCL. Higher frequencies (400 kHz, 1 MHz) require ≥2.7 V supply and are not valid for AT24C512-10TU-1.8 operation.

Does AT24C512-10TU-1.8 support partial page writes?

Yes, AT24C512-10TU-1.8 supports partial page writes within its 128-byte page boundary. The device increments the internal address counter automatically after each byte, allowing up to 128 bytes to be written in a single page write sequence - even if fewer than 128 bytes are transmitted.

What happens to the WP pin if left unconnected on AT24C512-10TU-1.8?

If the WP pin is left floating on AT24C512-10TU-1.8, it is internally pulled down to GND when capacitive coupling to the VCC plane is <3 pF. However, Atmel recommends explicitly tying WP to GND or VCC - floating operation is unreliable and may cause intermittent write protection failure in high-noise environments.

Is AT24C512-10TU-1.8 qualified for automotive applications?

AT24C512-10TU-1.8 is rated for industrial temperature range (–40°C to +85°C) and carries automotive-grade qualification per the datasheet's "Automotive Grade, Extended Temperature and Lead-free/Halogen-free Devices Available" statement. It is commonly used in automotive body electronics but is not AEC-Q100 certified - system-level qualification remains the customer's responsibility.

How many AT24C512-10TU-1.8 devices can share the same I²C bus?

Up to four AT24C512-10TU-1.8 devices can share a single I²C bus using hardwired A0 and A1 pins to configure unique 7-bit addresses (0x50–0x53). Each device must have distinct A0/A1 combinations; floating both pins results in address 0x50 for all, causing bus contention.