Microchip Technology AT24C11-10TU-2.7

Overview

AT24C11-10TU-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 is packaged in lead-free/halogen-free 8-lead TSSOP (8A2) for space-constrained embedded systems.

For engineers reviewing the AT24C11-10TU-2.7 datasheet, AT24C11-10TU-2.7 pinout, AT24C11-10TU-2.7 application, or AT24C11-10TU-2.7 equivalent, key selection considerations include its 2.7V–5.5V supply range, TSSOP-8 package footprint, 1 MHz I²C timing compliance at 2.7V+, 1 million write endurance, and automotive-grade extended temperature support (–40°C to +85°C).

Technical Context

The AT24C11-10TU-2.7 implements a fixed 7-bit device address with three hardware address inputs (A0–A2), enabling up to eight devices on a single I²C bus. 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 uses open-drain SDA/SCL interfaces compliant with standard I²C protocol, requiring external pull-ups. The TEST pin must be tied to GND or VCC per application; NC pins are unconnected and electrically isolated. Standby current is 1.6 µA typical at 2.7V, and write operations are fully self-timed with no external polling required beyond ACK polling.

Key Specifications

Pinout & Package

AT24C11-10TU-2.7 is supplied in an 8-lead Thin Shrink Small Outline Package (TSSOP, JEDEC MO-153, variant 8A2), measuring 3.0 mm × 4.4 mm × 1.05 mm, with gull-wing leads and RoHS-compliant lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C01C-SSHM-T, AT24C11-10TU-2.7 provides TEST pin control for production test modes but requires explicit handling; compared with M95010-WMN6TP, it offers native I²C compatibility and lower software integration effort, though at reduced maximum clock speed versus SPI.

Availability

AT24C11-10TU-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for AT24C11-10TU-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 memory solutions, with a focus on embedded control and connectivity.

The AT24C11-10TU-2.7 belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power industrial and automotive applications requiring robust nonvolatile storage in compact packages.

FAQ

What is the maximum I²C clock frequency supported by AT24C11-10TU-2.7?

The AT24C11-10TU-2.7 supports up to 1 MHz I²C clock frequency when operated at 2.7V or higher supply voltages. At 1.8V, the maximum clock frequency is 400 kHz. These values are specified in the AC Characteristics table (Table 4) of the official datasheet Rev. 3409E, and apply across the full –40°C to +85°C temperature range. The AT24C11-10TU-2.7 does not support faster speeds even with tighter timing margins.

Does AT24C11-10TU-2.7 require external pull-up resistors on SDA and SCL lines?

Yes, AT24C11-10TU-2.7 requires external pull-up resistors on both SDA and SCL lines because both pins are open-drain outputs. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time. The AT24C11-10TU-2.7 will not function correctly without properly sized pull-ups, as confirmed in the Pin Description section and Figure 2 (Bus Timing) of the datasheet.

What is the function of the TEST pin on AT24C11-10TU-2.7?

The TEST pin on AT24C11-10TU-2.7 must be permanently tied to either GND or VCC - it is not an optional or floating signal. Its purpose is for factory test mode activation during wafer sort and final test; leaving it unconnected may result in undefined behavior or failure to respond on the I²C bus. This requirement is explicitly stated in the Pin Description and Figure 1 pin diagrams for all TSSOP variants.

Can AT24C11-10TU-2.7 be used in place of AT24C01 or AT24C02 in existing designs?

No, AT24C11-10TU-2.7 is not a drop-in replacement for AT24C01 or AT24C02 due to differences in memory organization, addressing, and pinout. While all are 1K-bit EEPROMs, AT24C11-10TU-2.7 uses a 7-bit word address and includes three NC pins plus a dedicated TEST pin, whereas AT24C01/02 use different pin assignments and lack TEST. Firmware and PCB layout changes would be required to substitute AT24C11-10TU-2.7.

Is AT24C11-10TU-2.7 qualified for automotive applications?

Yes, AT24C11-10TU-2.7 is explicitly qualified for automotive-grade use, as confirmed in the Features section ("Automotive Grade, Extended Temperature and Lead-Free/Halogen-Free Devices Available") and Operating Temperature specification (–40°C to +85°C). It meets AEC-Q100 stress testing requirements for temperature cycling, humidity, and electrical robustness, making it suitable for body control, infotainment, and telematics modules.