Microchip Technology AT24C32A-10TU-2.7

Overview

AT24C32A-10TU-2.7 from Microchip Technology (formerly Atmel) is a 32 Kbit I²C-compatible serial EEPROM organized as 4096 × 8 bits, operating from 2.7V to 5.5V, featuring 400 kHz bus speed, hardware write protection via WP pin, and 32-byte page write capability. It is used in industrial control systems for storing calibration data, configuration settings, and firmware parameters.

For engineers reviewing the AT24C32A-10TU-2.7 datasheet, AT24C32A-10TU-2.7 pinout, AT24C32A-10TU-2.7 application, or AT24C32A-10TU-2.7 equivalent, this device delivers verified endurance of 1 million write cycles, 100-year data retention, low standby current (2.0 µA at 2.7V), Schmitt-trigger inputs for noise immunity, and TSSOP-8 packaging suitable for space-constrained PCB layouts.

Technical Context

The AT24C32A-10TU-2.7 implements a two-wire I²C interface with bidirectional SDA and unidirectional SCL, supporting standard-mode (400 kHz) timing across 1.8V–5.5V supply ranges. Its internal address counter enables current-address and sequential reads, while cascading up to eight devices on one bus is enabled by A0–A2 hardware-selectable device addressing.

Write operations are internally self-timed (max 5 ms), with byte and 32-byte page modes supported. The WP pin provides hardware-level memory lockout when pulled high to VCC, and all pins feature Schmitt-triggered inputs with filtered noise suppression - critical for reliable operation in electrically noisy industrial environments.

Key Specifications

Pinout & Package

AT24C32A-10TU-2.7 is housed in an 8-lead TSSOP (Thin Shrink Small Outline Package) with 4.4 mm body width, RoHS-compliant lead-free finish, and industrial temperature range (–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 AT24C32A-10TU-2.7, the AT24C32D-SSHM-T offers wider voltage flexibility at the cost of package compatibility, while the CAT24C32WI-GT3 preserves the TSSOP-8 form factor but trades off standby current efficiency - making AT24C32A-10TU-2.7 optimal for 2.7V–5.5V systems prioritizing ultra-low quiescent power and industrial-grade reliability.

Availability

AT24C32A-10TU-2.7 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and medical device manufacturing requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AT24C32A-10TU-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 is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with broad industrial and automotive qualification capabilities.

The AT24C32A-10TU-2.7 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for reliable, low-power, I²C-based parameter and configuration storage in space- and power-constrained embedded systems.

FAQ

What is the maximum I²C clock frequency supported by the AT24C32A-10TU-2.7?

The AT24C32A-10TU-2.7 supports a maximum I²C clock frequency of 400 kHz across its full operating voltage range (2.7V to 5.5V). This standard-mode speed is fully compliant with I²C specification Rev. 6 and enables robust communication with most microcontrollers and SoCs without requiring high-speed mode circuitry. Timing parameters such as tLOW (1.2 µs) and tHIGH (0.6 µs) are guaranteed under these conditions.

Does the AT24C32A-10TU-2.7 support partial page writes?

Yes, the AT24C32A-10TU-2.7 supports partial page writes within its 32-byte pages. When initiating a page write, the device accepts up to 32 bytes starting from any address aligned within the same page boundary. If fewer than 32 bytes are sent before the STOP condition, only those bytes are written - the remaining bytes in the page retain their prior values. This behavior is explicitly defined in the device's page write timing and address increment logic.

How does the Write Protect (WP) pin function on the AT24C32A-10TU-2.7?

On the AT24C32A-10TU-2.7, the WP pin is an active-high hardware lock: when pulled to VCC, all write operations (byte and page) are inhibited, preserving memory contents regardless of I²C commands received. When grounded or left floating (with <3 pF capacitive coupling), WP defaults to logic low, enabling writes. This dual-mode behavior provides both intentional and fail-safe protection against unintended memory corruption.

What is the endurance and data retention specification for the AT24C32A-10TU-2.7?

The AT24C32A-10TU-2.7 is characterized for 1,000,000 write cycles per memory location and guarantees 100 years of data retention at +25°C. These specifications are measured under standard test conditions (5.0V, 25°C, page-mode writes) and apply across the full industrial temperature range (–40°C to +85°C), with derating applied per JEDEC standards for elevated temperatures.

Is the AT24C32A-10TU-2.7 pin-compatible with other AT24Cxx EEPROMs?

Yes, the AT24C32A-10TU-2.7 shares identical pinout and electrical interface with all 8-lead variants in the AT24Cxx family, including AT24C16A, AT24C64A, and AT24C128A in TSSOP-8 (8A2) packaging. Address pins A0–A2, SDA, SCL, WP, VCC, and GND occupy identical positions and perform identical functions - enabling scalable memory sizing without PCB redesign.