Microchip Technology AT24C512C1-10CU-2.7

Overview

AT24C512C1-10CU-2.7 from Microchip Technology (formerly Atmel) is a 512 Kbit (65,536 × 8) two-wire serial EEPROM optimized for low-voltage industrial applications. It operates from 2.7V to 5.5V, supports up to 1 MHz I²C clock at 5V, features hardware write protection via WP pin, and delivers 100,000 write cycles with 40-year data retention - deployed in automotive body control modules for configuration storage.

For engineers reviewing the AT24C512C1-10CU-2.7 datasheet, AT24C512C1-10CU-2.7 pinout, AT24C512C1-10CU-2.7 application, or AT24C512C1-10CU-2.7 equivalent, key selection criteria include its 2.7–5.5V supply range, 128-byte page write capability, Schmitt-triggered inputs for noise immunity, 8-lead LAP (8CN1) leadless package, and automotive-grade temperature support (–40°C to +85°C).

Technical Context

The AT24C512C1-10CU-2.7 implements a standard I²C-compatible two-wire interface with open-drain SDA and edge-triggered SCL, supporting cascaded operation of up to four devices via A0/A1 address pins. Its internal architecture organizes memory as 512 pages of 128 bytes each, enabling partial-page writes and automatic address incrementing during sequential access.

It integrates hardware write protection (WP pin), Schmitt-triggered inputs with filtered noise suppression, and a self-timed write cycle (max 5 ms). The device uses internal pull-down biasing on floating A0/A1 and WP pins when capacitive coupling to VCC is below 3 pF - critical for robustness in noisy automotive environments.

Key Specifications

Pinout & Package

AT24C512C1-10CU-2.7 is housed in an 8-lead Leadless Array Package (LAP, code 8CN1), measuring 8.0 mm × 5.0 mm × 1.04 mm with 1.27 mm lead pitch and exposed metal pads for thermal and electrical performance. Pin numbering follows standard LAP bottom-view orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M24512-RDW6TP and CAT24C512WI-GT3, the AT24C512C1-10CU-2.7 uniquely combines automotive-grade temperature range (–40°C to +85°C), 8CN1 LAP packaging for space-constrained modules, and factory-trimmed 2.7V operation - making it the only choice for production automotive ECUs requiring AEC-Q100 compliance and minimal board area.

Availability

AT24C512C1-10CU-2.7 is available at Aetrix Electronics and suitable for automotive body control modules, infotainment systems, and telematics gateways requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant nonvolatile memory.

Supply support for AT24C512C1-10CU-2.7 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 acquired Atmel in 2016 and maintains full product continuity, qualification, and technical support for the AT24Cxx EEPROM family.

The AT24C512C1-10CU-2.7 belongs to Microchip's automotive-qualified serial EEPROM product line, designed specifically for reliable, low-power, long-life data storage in harsh-temperature embedded systems including engine management, ADAS, and vehicle networking nodes.

FAQ

What is the maximum I²C clock frequency supported by AT24C512C1-10CU-2.7?

The AT24C512C1-10CU-2.7 supports up to 1 MHz I²C clock frequency when operated at 5.0V, 400 kHz at 2.7V, and 100 kHz at 1.8V. Its AC characteristics table specifies tLOW and tHIGH minima accordingly - for 2.7V operation, minimum low and high clock pulse widths are 1.3 µs and 1.0 µs respectively. This ensures compatibility with both legacy and high-speed microcontrollers without protocol translation.

Does AT24C512C1-10CU-2.7 require external pull-up resistors on SDA and SCL lines?

Yes, AT24C512C1-10CU-2.7 requires external pull-up resistors on both SDA and SCL lines because its I/O structure uses open-drain outputs. Recommended values are 1.3 kΩ for 2.7V operation and 10 kΩ for 1.8V operation, per the AC test conditions in the datasheet. Pull-ups must connect to the same VCC domain as the AT24C512C1-10CU-2.7 supply to ensure valid logic levels and timing margins.

How does the write protect (WP) pin function on AT24C512C1-10CU-2.7?

On AT24C512C1-10CU-2.7, the WP pin is active-high: when tied to VCC, all write operations (byte and page) are inhibited; when grounded or left floating (with board coupling <3 pF), writes are enabled. Floating WP defaults to logic low due to internal pull-down - but Atmel recommends hardwiring WP to GND or VCC for deterministic behavior in automotive environments where stray capacitance may vary.

What package type is used for AT24C512C1-10CU-2.7, and what are its key mechanical dimensions?

AT24C512C1-10CU-2.7 uses the 8-lead Leadless Array Package (LAP), designated 8CN1. Its body measures 8.00 mm × 5.00 mm × 1.04 mm nominal, with 1.27 mm lead pitch and exposed metal pads on the bottom for thermal conduction and solder joint reliability. This package supports fine-pitch automated assembly and meets IPC-7351B land pattern standards for high-yield manufacturing.

Can AT24C512C1-10CU-2.7 be used in place of AT24C512C1-10CI-2.7?

Yes, AT24C512C1-10CU-2.7 is a direct replacement for AT24C512C1-10CI-2.7 in terms of electrical specifications and functionality, differing only in environmental compliance: "U" denotes lead-free/halogen-free/RoHS-compliant packaging, while "I" indicates standard industrial-grade finish. Both share identical 8CN1 LAP packaging, –40°C to +85°C temperature rating, and 2.7–5.5V operation - making them interchangeable in automotive production builds.