Microchip Technology AT24C11N-10SU-2.7

Overview

AT24C11N-10SU-2.7 from Microchip Technology (formerly Atmel) is a 1K-bit (128 × 8) two-wire serial EEPROM optimized for low-voltage industrial applications. It operates from 2.7V to 5.5V, supports 400 kHz I²C communication at 1.8V and 1 MHz at 2.7V/5V, features 4-byte page write mode, self-timed 5 ms max write cycle, and delivers 1 million write cycles with 100-year data retention. It is used in embedded system configuration storage, sensor calibration data logging, and power-management parameter backup.

For engineers reviewing the AT24C11N-10SU-2.7 datasheet, AT24C11N-10SU-2.7 pinout, AT24C11N-10SU-2.7 application, or AT24C11N-10SU-2.7 equivalent, key selection considerations include its 2.7V–5.5V supply range, SOT23-5 package footprint, I²C timing compliance at 1 MHz, NC pin handling, and TEST pin grounding requirement for standard operation.

Technical Context

The AT24C11N-10SU-2.7 implements a fixed 7-bit I²C slave address architecture with no hardware address pins (A0–A2), uses open-drain SDA/SCL signaling compliant with standard-mode and fast-mode I²C protocols, and relies on external pull-ups. Its memory is organized into 32 pages of 4 bytes each, with internal address incrementing during page writes and automatic rollover at page boundaries.

It requires the TEST pin to be tied to GND for normal operation and includes built-in write protection via software address lock and hardware write-protect pin functionality (not implemented in this variant). Standby current is 1.6 µA typical at 2.7V, and it enters low-power standby after STOP condition receipt and internal write completion.

Key Specifications

Pinout & Package

AT24C11N-10SU-2.7 is packaged in a 5-lead SOT23 (5TS1) surface-mount package measuring 2.90 mm × 1.60 mm × 1.10 mm, with lead pitch of 0.95 mm and RoHS-compliant lead-free/halogen-free finish ("U" suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C11N-10SU-2.7, the AT24C01C-SSHM-T offers address pin flexibility at the cost of larger SOIC-8 footprint and no TEST pin constraint, while the CAT24C01HU4I-GT3 matches the SOT23-5 package but trades 1 MHz speed for simplified pinout-making AT24C11N-10SU-2.7 optimal where high-speed writes and existing TEST/GND routing exist.

Availability

AT24C11N-10SU-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and power management backup requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AT24C11N-10SU-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 emphasis on reliability and long-term product availability.

The AT24C11N-10SU-2.7 belongs to Microchip's legacy AT24Cxx serial EEPROM product line, designed specifically for cost-sensitive, space-constrained industrial and automotive applications requiring robust, low-power, I²C-compatible nonvolatile storage.

FAQ

What is the correct connection for the TEST pin on AT24C11N-10SU-2.7?

The TEST pin on AT24C11N-10SU-2.7 must be connected directly to GND for normal operation. Leaving it floating or connecting it to VCC may result in undefined behavior or failure to respond on the I²C bus. This requirement is explicitly documented in the AT24C11 datasheet Pin Description section and applies uniquely to this variant - unlike later EEPROM families that repurpose or omit the TEST pin.

Does AT24C11N-10SU-2.7 support standard 100 kHz or fast-mode 400 kHz I²C speeds?

AT24C11N-10SU-2.7 supports both: 400 kHz at 1.8V operation and 1 MHz at 2.7V, 2.5V, or 5V supply levels. Its AC Characteristics table confirms tLOW/tHIGH timing compliance down to 0.4 µs at 2.7V+, enabling full fast-mode I²C operation. At 100 kHz, timing margins are significantly relaxed, but the device does not require special configuration to operate at that speed.

Can AT24C11N-10SU-2.7 be used interchangeably with AT24C01 or AT24C02 devices?

No - AT24C11N-10SU-2.7 is not interchangeable with AT24C01 or AT24C02. It has a fixed 7-bit slave address (no A0/A1/A2 pins), different memory organization (128 × 8 vs. 128 × 8 for AT24C01 but differing page structure), and unique TEST pin behavior. Firmware must be adapted for its address scheme and page write protocol; PCB layout differs due to SOT23-5 vs. SOIC-8 footprints in common alternatives.

What is the maximum write endurance and data retention specification for AT24C11N-10SU-2.7?

AT24C11N-10SU-2.7 is specified for 1 million write cycles and 100 years of data retention at +25°C. These values are guaranteed under recommended operating conditions (VCC = 2.7V–5.5V, TA = –40°C to +85°C) and measured per JEDEC standards. Endurance degrades at elevated temperature or voltage extremes, and retention decreases logarithmically above +25°C per Arrhenius modeling in the datasheet.

Is AT24C11N-10SU-2.7 pin-compatible with other SOT23-5 EEPROMs like CAT24C01HU4I-GT3?

No - although both use SOT23-5 packages, AT24C11N-10SU-2.7 and CAT24C01HU4I-GT3 differ in pin function assignment: AT24C11N-10SU-2.7 assigns Pin 5 to TEST (GND-required), while CAT24C01HU4I-GT3 uses Pin 5 as NC or VCC depending on variant. Direct substitution would cause functional failure unless the TEST pin is correctly handled in the design.