Microchip Technology AT24C08AN-10SI-2.7-T

Overview

AT24C08AN-10SI-2.7-T from Microchip Technology (formerly Atmel) is an 8K-bit (1024 × 8) I²C-compatible serial EEPROM optimized for low-voltage industrial applications. It operates across 2.7V–5.5V, supports 100 kHz I²C bus speed at 2.7V, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in embedded systems for storing calibration data, configuration parameters, and firmware patches.

For engineers reviewing the AT24C08AN-10SI-2.7-T datasheet, AT24C08AN-10SI-2.7-T pinout, AT24C08AN-10SI-2.7-T application, or AT24C08AN-10SI-2.7-T equivalent, this page provides verified electrical specifications, JEDEC SOIC-8 package mapping, industrial temperature range (-40°C to +85°C), page-write capability (16-byte pages), and direct alternatives with documented functional and interface compatibility.

Technical Context

The AT24C08AN-10SI-2.7-T implements a 2-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain bidirectional data transfer. It uses a 10-bit internal address counter for random/sequential reads and supports device addressing via A2 only (A0/A1 are no-connect), enabling up to two devices on a shared bus.

Its write architecture includes byte-write and 16-byte page-write modes with self-timed 10 ms max write cycle, acknowledge polling support, and hardware-based write protection that disables all writes when WP = VCC. The device enters low-power standby mode after STOP condition or power-up, drawing ≤4 µA at 2.7V.

Key Specifications

Pinout & Package

AT24C08AN-10SI-2.7-T is housed in an 8-pin JEDEC-standard SOIC package (8S1), 0.150" wide, with gull-wing leads and RoHS-compliant finish. Pin 1 is marked by a beveled corner or notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C08AN-10SI-2.7-T, AT24C08D-SSHM-T offers faster I²C speed but narrower low-voltage margin, while CAT24C08HU4I-GT3 provides true pin-and-function equivalence with full industrial qualification - making it ideal for continuity management in production programs.

Availability

AT24C08AN-10SI-2.7-T is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, automotive body electronics, and medical diagnostics requiring stable component supply across extended product lifecycles.

Supply support for AT24C08AN-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 nonvolatile memory solutions, with a focus on reliability, longevity, and embedded system integration.

The AT24C08AN-10SI-2.7-T belongs to Microchip's legacy AT24CxxA serial EEPROM family, designed specifically for robust, low-power, I²C-based parameter storage in industrial, automotive, and consumer applications demanding high endurance and long-term data integrity.

FAQ

What is the maximum I²C clock frequency supported by AT24C08AN-10SI-2.7-T at its rated 2.7V supply?

The AT24C08AN-10SI-2.7-T supports a maximum I²C clock frequency of 100 kHz when operating at 2.7V. This is specified in the AC Characteristics table under "2.7-, 2.5-, 1.8-volt" column for fSCL. At 5.0V, it supports up to 400 kHz, but the -2.7 suffix confirms its qualification for 2.7V–5.5V operation with 100 kHz guaranteed timing at the lower end. Exceeding 100 kHz at 2.7V may violate setup/hold time margins.

How does the Write Protect (WP) pin function on AT24C08AN-10SI-2.7-T, and what memory region does it protect?

On the AT24C08AN-10SI-2.7-T, the WP pin provides hardware-level write protection: when pulled high to VCC, it disables all write operations across the full 8K-bit memory array. This differs from earlier AT24C02/04 variants, which protect only upper halves. The protection is immediate and independent of I²C commands - no software override is possible once WP = VCC.

What is the pin configuration and package type of AT24C08AN-10SI-2.7-T, and are A0 and A1 functional?

AT24C08AN-10SI-2.7-T uses an 8-pin JEDEC SOIC package (8S1). Pinout is: 1=A0 (NC), 2=A1 (NC), 3=A2 (address), 4=GND, 5=VCC, 6=WP, 7=SCL, 8=SDA. Per the datasheet, A0 and A1 are explicitly designated as no-connects for the AT24C08A variant - they are internally unconnected and must not be used for addressing or biasing.

Does AT24C08AN-10SI-2.7-T support page write operations, and what is the page size?

Yes, AT24C08AN-10SI-2.7-T supports 16-byte page write operations. This is confirmed in the Features section ("16-Byte Page (4K, 8K) Write Modes") and Device Operation section. Each page spans 16 consecutive bytes; attempting to write beyond page boundary causes automatic rollover to the start of the same page - a key consideration for firmware-safe sequential writes.

What are the endurance and data retention specifications for AT24C08AN-10SI-2.7-T, and are they tested per JEDEC standards?

AT24C08AN-10SI-2.7-T guarantees 1,000,000 write cycles and 100 years of data retention at +25°C, as stated in the Features section and DC Characteristics table. These values are characterized per JEDEC Standard JESD22-A117 (endurance) and JESD22-A108 (retention), though individual units are not 100% tested - the specs represent typical lifetime under specified operating conditions.