Microchip Technology AT24C32AN-10SI-1.8

Overview

AT24C32AN-10SI-1.8 from Microchip Technology (formerly Atmel) is a 32 Kbit I²C-compatible serial EEPROM organized as 4096 × 8 bits, operating from 1.8V to 5.5V with 100 kHz clock rate at 1.8V, 32-byte page write capability, and hardware write protection via WP pin. It serves as nonvolatile configuration storage in embedded controllers, sensor nodes, and power management ICs requiring low-voltage operation.

For engineers reviewing the AT24C32AN-10SI-1.8 datasheet, AT24C32AN-10SI-1.8 pinout, AT24C32AN-10SI-1.8 application, or AT24C32AN-10SI-1.8 equivalent, key selection criteria include 1.8V minimum supply, industrial temperature range (–40°C to +85°C), JEDEC SOIC-8 package, 1 million write cycles endurance, and I²C bus compatibility with Schmitt-trigger inputs for noise immunity.

Technical Context

The AT24C32AN-10SI-1.8 implements a two-wire I²C interface with bidirectional open-drain SDA and edge-triggered SCL, supporting cascaded addressing via A0–A2 pins for up to eight devices on one bus. Its internal architecture uses 128 pages of 32 bytes each, with automatic address incrementing during page writes and roll-over behavior at page boundaries.

It features hardware write protection through the WP pin, Schmitt-trigger filtered inputs for robustness against EMI, and acknowledge polling for write cycle completion detection. Standby current is specified at 1.0 µA @ 1.8V, enabling integration into battery-powered systems without compromising data retention (100 years).

Key Specifications

Pinout & Package

AT24C32AN-10SI-1.8 is housed in an 8-lead JEDEC SOIC (8S1) package, 0.150" wide body, with gull-wing leads and standard 1.27 mm pitch. Pin 1 is marked by a notch or beveled corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M24C32-WMN6TP and BR24G32FJ-3GE2, the AT24C32AN-10SI-1.8 delivers guaranteed 100 kHz I²C performance at 1.8V and JEDEC SOIC compatibility - making it optimal for cost-sensitive, low-voltage industrial designs requiring proven interoperability and minimal layout impact.

Availability

AT24C32AN-10SI-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, smart energy metering, automotive body control modules, IoT edge node configuration, and medical device parameter storage requiring stable component supply across extended product lifecycles.

Supply support for AT24C32AN-10SI-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, FPGA, and memory solutions, with a focus on reliability, longevity, and embedded system integration.

The AT24C32AN-10SI-1.8 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for low-power, low-voltage nonvolatile data storage in space-constrained embedded systems across industrial, automotive, and consumer markets.

FAQ

What is the maximum I²C clock frequency supported by AT24C32AN-10SI-1.8 at 1.8V?

The AT24C32AN-10SI-1.8 supports a maximum clock frequency of 100 kHz when operated at 1.8V, as specified in the AC Characteristics table. This ensures robust signal integrity and timing margin under low-voltage conditions where rise/fall times are slower. Higher frequencies (up to 400 kHz) require VCC ≥ 2.5V. The 100 kHz rating is fully characterized and guaranteed across the industrial temperature range.

Does AT24C32AN-10SI-1.8 support partial page writes?

Yes, the AT24C32AN-10SI-1.8 supports partial page writes - any number of bytes from 1 to 32 can be written within a single 32-byte page boundary without corrupting adjacent data. The internal address counter increments automatically after each byte, and wraparound occurs only at the page end. This enables efficient updates of sub-blocks like individual sensor calibration registers without erasing unrelated data in the same page.

How does the WP pin function on AT24C32AN-10SI-1.8?

The WP (Write Protect) pin on AT24C32AN-10SI-1.8 is an active-high hardware enable for write operations. When tied to VCC, all write commands (byte and page) are inhibited; when grounded or left floating (with board coupling <3 pF), writes are permitted. Floating WP defaults to logic low due to internal pull-down, but Atmel recommends explicit grounding for deterministic behavior in high-noise or high-capacitance layouts.

What is the endurance and data retention specification for AT24C32AN-10SI-1.8?

The AT24C32AN-10SI-1.8 is rated for 1 million write cycles per memory location and guarantees 100 years of data retention at +25°C. These specifications are validated under worst-case conditions (5.5V, 85°C) and apply across the full industrial temperature range. Endurance testing follows JEDEC Standard JESD22-A117, and retention is extrapolated from accelerated high-temperature testing per JESD22-A108.

Is AT24C32AN-10SI-1.8 pin-compatible with other AT24Cxx EEPROMs in SOIC-8 packages?

Yes, AT24C32AN-10SI-1.8 uses the standard 8-lead JEDEC SOIC (8S1) footprint and shares identical pinout (A0–A2, SDA, SCL, WP, GND, VCC) with all AT24Cxx family members in the same package variant. This allows drop-in replacement among 32K/64K variants (e.g., AT24C64AN-10SI-1.8) when memory size and timing requirements align - though clock rate and voltage specs must still be verified per application.