Microchip Technology AT24C32AW-10SI-2.7-T

Overview

AT24C32AW-10SI-2.7-T from Microchip Technology (formerly Atmel) is a 32K-bit I²C-compatible serial EEPROM organized as 4096 × 8 bits, operating from 2.7V to 5.5V, featuring 32-byte page write capability, 1 million write cycles endurance, and 100-year data retention. It serves as nonvolatile configuration storage in microcontroller-based industrial sensors and automotive body control modules.

For engineers reviewing the AT24C32AW-10SI-2.7-T datasheet, AT24C32AW-10SI-2.7-T pinout, AT24C32AW-10SI-2.7-T application, or AT24C32AW-10SI-2.7-T equivalent, key selection considerations include its 2.7V–5.5V supply range, 400 kHz max clock rate at 2.5V+, hardware write protection via WP pin, SOIC-8 packaging, and compatibility with standard I²C bus timing requirements.

Technical Context

The AT24C32AW-10SI-2.7-T implements a two-wire (I²C) serial interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. It supports cascaded addressing using A0–A2 pins, enabling up to eight devices on a single bus. The device uses open-drain bidirectional SDA with internal pull-down biasing for floating address/write-protect pins under low-capacitance conditions.

It executes self-timed internal write cycles with a maximum duration of 5 ms, supports byte and 32-byte page writes, and enters low-power standby mode (<2 µA at 2.7V) after STOP condition receipt. Acknowledge polling is supported to detect write completion without fixed delay timing.

Key Specifications

Pinout & Package

AT24C32AW-10SI-2.7-T is housed in an 8-lead JEDEC SOIC (8S1) package measuring 4.90 mm × 3.90 mm × 1.75 mm, with gull-wing leads and 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M24C32-WMN6TP and CAT24C32HU4IGT3, the AT24C32AW-10SI-2.7-T provides verified -40°C to +85°C operation with robust noise immunity and deterministic 5 ms write timing-making it optimal for industrial control and automotive body electronics where environmental resilience and timing predictability are critical.

Availability

AT24C32AW-10SI-2.7-T is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, smart energy metering, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for AT24C32AW-10SI-2.7-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 reliability, longevity, and embedded system integration.

The AT24C32AW-10SI-2.7-T belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for low-voltage, low-power, and high-reliability nonvolatile data storage in industrial, automotive, and medical applications where write endurance and data retention are mission-critical.

FAQ

What is the maximum I²C clock frequency supported by the AT24C32AW-10SI-2.7-T?

The AT24C32AW-10SI-2.7-T supports up to 400 kHz clock frequency when VCC is 2.5 V or higher. At 2.7 V operation, this full speed is maintained, enabling rapid configuration reads and writes in time-sensitive embedded systems. The device does not support 1 MHz operation - exceeding 400 kHz may result in timing violations and communication failure.

Does the AT24C32AW-10SI-2.7-T require external pull-up resistors on SDA and SCL lines?

Yes, the AT24C32AW-10SI-2.7-T requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values range from 1.8 kΩ (for 400 kHz, 3.3 V) to 4.7 kΩ (for 100 kHz, 5 V). Pull-ups must connect to the same VCC domain as the AT24C32AW-10SI-2.7-T to ensure valid logic levels.

How many devices can share the same I²C bus with the AT24C32AW-10SI-2.7-T?

Up to eight AT24C32AW-10SI-2.7-T devices can share a single I²C bus using the A0, A1, and A2 address pins to configure unique 3-bit device addresses (0x50–0x57). All devices must operate within the same VCC range and temperature grade to guarantee timing compliance across the bus.

What happens if the WP pin on the AT24C32AW-10SI-2.7-T is left unconnected?

If the WP pin on the AT24C32AW-10SI-2.7-T is left floating, it is internally pulled down to GND under low-capacitance PCB conditions (<3 pF coupling to VCC plane), enabling normal write operations. However, Microchip recommends hardwiring WP to GND or VCC for deterministic behavior - floating WP risks intermittent write inhibition in high-noise or high-capacitance layouts.

Is the AT24C32AW-10SI-2.7-T compatible with 1.8V I²C systems?

No - the AT24C32AW-10SI-2.7-T is a 2.7V–5.5V variant and is not specified for reliable operation below 2.7V. For 1.8V systems, Microchip offers the AT24C32AN-10SI-1.8 or AT24C32AW-10SI-1.8 variants, which are characterized down to 1.8V and support 100 kHz operation at that voltage.