Microchip Technology AT24C512-10TU-1.8-T

Overview

AT24C512-10TU-1.8-T 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 WP pin, and delivers 100,000 write cycles with 40-year data retention. It is used in industrial sensor calibration storage and firmware parameter backup where space-constrained, battery-powered operation is required.

For engineers reviewing the AT24C512-10TU-1.8-T datasheet, AT24C512-10TU-1.8-T pinout, AT24C512-10TU-1.8-T application, or AT24C512-10TU-1.8-T equivalent, key selection considerations include its 1.8 V supply range, 128-byte page write capability, TSSOP-8 package footprint, Schmitt-triggered inputs for noise immunity, and cascading support for up to four devices on one I²C bus.

Technical Context

The AT24C512-10TU-1.8-T implements a standard two-wire (I²C-compatible) interface with open-drain SDA and edge-triggered SCL, supporting device addressing via A0/A1 pins for multi-drop bus configuration. Its internal architecture organizes memory as 512 pages of 128 bytes each, enabling partial-page writes without erasing adjacent data.

It uses internal pull-down biasing on floating A0, A1, and WP pins (with <3 pF board coupling), and incorporates Schmitt-triggered inputs with filtered noise suppression. Write operations are self-timed with a maximum 5 ms cycle, and acknowledge polling is supported to detect completion without fixed delay timing.

Key Specifications

Pinout & Package

AT24C512-10TU-1.8-T is housed in an 8-lead TSSOP (8A2) package measuring 3.0 mm × 4.4 mm × 1.05 mm, with 0.65 mm lead pitch and gull-wing leads. The package is RoHS-compliant, halogen-free, and rated for industrial temperature (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with M24C512-RMN6TP and BR24G512FJ-3GE2, the AT24C512-10TU-1.8-T provides deterministic cascading via A0/A1 pins, lowest 1.8 V standby current (1.0 µA), and seamless integration into existing Atmel/Microchip-based designs without address or timing revalidation.

Availability

AT24C512-10TU-1.8-T is available at Aetrix Electronics and suitable for industrial sensor calibration storage, firmware parameter backup, smart meter tamper logging, and automotive body control module NVM requiring stable component supply across extended product lifecycles.

Supply support for AT24C512-10TU-1.8-T 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 memory solutions, with a focus on embedded control and connectivity.

The AT24C512-10TU-1.8-T belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for reliable, low-voltage nonvolatile data storage in space-constrained industrial, automotive, and consumer electronics applications.

FAQ

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

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

Does AT24C512-10TU-1.8-T support page write operations, and what is the page size?

Yes, the AT24C512-10TU-1.8-T supports 128-byte page write operations. As stated in the Memory Organization section and Table 1, the 512 Kbit memory is internally organized into 512 pages of 128 bytes each. Partial page writes are allowed, and the address automatically rolls over within the same page when exceeding 128 bytes.

How does the Write Protect (WP) pin function on AT24C512-10TU-1.8-T?

When WP is tied to VCC, all write operations to the AT24C512-10TU-1.8-T memory array are inhibited. When WP is grounded, normal read/write operations are permitted. If left floating, the pin is internally pulled down to GND provided board capacitive coupling to VCC is less than 3 pF; otherwise, external grounding is recommended per datasheet guidance.

What package type is used for AT24C512-10TU-1.8-T, and what are its key mechanical dimensions?

The AT24C512-10TU-1.8-T uses an 8-lead TSSOP (8A2) package. Per the packaging drawing, it measures 3.0 mm (min) × 4.4 mm (nominal) × 1.05 mm (max height), with 0.65 mm lead pitch and gull-wing leads. The "U" suffix confirms RoHS-compliant, halogen-free construction.

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

The AT24C512-10TU-1.8-T is rated for industrial temperature (–40°C to +85°C) and carries automotive-grade qualification per the "Automotive Grade, Extended Temperature and Lead-free/Halogen-free Devices Available" statement in the Features section. However, it is not AEC-Q100 certified; for full automotive qualification, Microchip's AEC-Q100-compliant variants (e.g., AT24C512BN-SH-B) should be selected.