Microchip Technology AT24C11N-10SI-2.7-T

Overview

AT24C11N-10SI-2.7-T from Microchip Technology (formerly Atmel) is a 1-kbit serial EEPROM IC organized as 128 × 8 bits, operating from 2.7V to 5.5V, featuring a two-wire I²C-compatible interface, 4-byte page write capability, and automotive-grade reliability with 1 million write cycles and 100-year data retention. It is used in industrial control systems for parameter storage, calibration data backup, and configuration persistence.

For engineers reviewing the AT24C11N-10SI-2.7-T datasheet, AT24C11N-10SI-2.7-T pinout, AT24C11N-10SI-2.7-T application, or AT24C11N-10SI-2.7-T equivalent, key selection considerations include its 2.7V–5.5V supply range, 400 kHz/1 MHz I²C timing compliance, SOIC-8 package footprint, and guaranteed endurance under extended temperature (–40°C to +85°C).

Technical Context

The AT24C11N-10SI-2.7-T implements a standard two-wire serial interface with open-drain SDA and edge-triggered SCL pins, supporting bidirectional data transfer using acknowledge polling and START/STOP condition protocols. Its internal architecture uses 32 pages of 4 bytes each, with automatic address incrementing within a page and rollover at page boundaries.

It operates across industrial temperature (–40°C to +85°C), supports both byte and page write modes, and enters low-power standby mode after STOP condition receipt or power-up. The TEST pin is functional (GND or VCC tied), and NC pins are unconnected - no internal bonding or logic function.

Key Specifications

Pinout & Package

AT24C11N-10SI-2.7-T is supplied in an 8-lead JEDEC SOIC (8S1) package, 0.150" wide body, with gull-wing leads, RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C11N-10SI-2.7-T, M95128-DRMN6TP/K offers higher density but demands SPI hardware and layout changes, while 24LC11-I/SN provides seamless compatibility with identical timing, voltage, and footprint - ideal for continuity-driven BOM updates.

Availability

AT24C11N-10SI-2.7-T is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and automotive body control modules requiring stable component supply across extended temperature and long product lifecycles.

Supply support for AT24C11N-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with global manufacturing and quality certifications including ISO 9001 and AEC-Q200.

The AT24C11N-10SI-2.7-T belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for low-power, space-constrained embedded systems needing reliable, low-voltage configuration storage in industrial and automotive applications.

FAQ

What is the maximum I²C clock frequency supported by AT24C11N-10SI-2.7-T?

The AT24C11N-10SI-2.7-T supports up to 1 MHz I²C clock frequency when operated at VCC ≥ 2.7V, and 400 kHz at 1.8V. This dual-speed capability ensures compatibility with both legacy microcontrollers and newer high-speed I²C masters. The device's tLOW and tHIGH timing parameters are specified accordingly in the AC characteristics table. Always verify bus capacitance and pull-up strength to maintain signal integrity at 1 MHz.

Does AT24C11N-10SI-2.7-T require external pull-up resistors on SDA and SCL lines?

Yes, AT24C11N-10SI-2.7-T requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is a CMOS input. Typical values range from 1.8 kΩ (for 1 MHz, low-capacitance buses) to 10 kΩ (for 100 kHz, longer traces). The exact value depends on bus capacitance, VCC, and desired rise time - refer to Figure 2 and Table 4 in the AT24C11N-10SI-2.7-T datasheet for design guidance.

Can AT24C11N-10SI-2.7-T be used in automotive applications?

Yes, AT24C11N-10SI-2.7-T is qualified for automotive-grade operation with extended temperature range (–40°C to +85°C) and is offered in lead-free/halogen-free packaging. It meets AEC-Q200 stress test requirements for passive components when sourced through Microchip's automotive qualification program. For safety-critical functions, confirm device grade (e.g., "AEC-Q200 Qualified" marking) and consult Microchip's automotive product change notifications before integration into AT24C11N-10SI-2.7-T-based designs.

How many write cycles can AT24C11N-10SI-2.7-T endure before failure?

AT24C11N-10SI-2.7-T is rated for 1 million write cycles per memory location, as verified under standard conditions (VCC = 5.0V, TA = 25°C, page mode). This endurance is guaranteed across the full industrial temperature range and supports applications requiring frequent updates - such as real-time logging or adaptive calibration. Wear leveling is not implemented internally; system-level firmware must manage address rotation if exceeding 1M cycles per location.

What is the function of the TEST pin on AT24C11N-10SI-2.7-T?

The TEST pin on AT24C11N-10SI-2.7-T is a factory test input that must be externally tied to either GND or VCC for normal operation - it must never be left floating. Its state determines internal test mode activation during manufacturing; incorrect biasing may cause undefined behavior or communication failure. In all production designs using AT24C11N-10SI-2.7-T, tie TEST to GND unless specific application notes require VCC biasing.