Microchip Technology AT24C01-10TI-2.7

Overview

AT24C01-10TI-2.7 from Microchip Technology (formerly Atmel) is a 1K-bit serial EEPROM IC optimized for low-voltage embedded systems, featuring 128 × 8-bit memory organization, 2-wire I²C-compatible interface, and operation from 2.7V to 5.5V. It delivers 1 million write cycles, 100-year data retention, and supports 100 kHz clock frequency at 2.7V in industrial temperature range (–40°C to +85°C), commonly used for configuration storage in sensor nodes and power management circuits.

For engineers reviewing the AT24C01-10TI-2.7 datasheet, AT24C01-10TI-2.7 pinout, AT24C01-10TI-2.7 application, or AT24C01-10TI-2.7 equivalent, key selection considerations include its TSSOP-8 package, 4-byte page write capability, self-timed 10 ms max write cycle, and compatibility with I²C-bus timing requirements across 1.8V/2.7V/5V supply rails.

Technical Context

The AT24C01-10TI-2.7 implements a standard I²C protocol with bidirectional open-drain SDA and edge-triggered SCL pins, supporting START/STOP condition generation and 9-cycle ACK polling during write cycles. Its internal address counter enables sequential read and page write operations without external address latching.

Memory access uses a 7-bit device address plus R/W bit, with word addressing requiring only 7 bits due to 128-word depth. The TEST pin is functional (GND or VCC tied), and NC pins are unconnected - all three package variants (PDIP, SOIC, TSSOP) share identical pinout and logic behavior.

Key Specifications

Pinout & Package

AT24C01-10TI-2.7 is supplied in an 8-lead Thin Shrink Small Outline Package (TSSOP), 4.4 mm body width, JEDEC MO-153 compliant, with 0.65 mm lead pitch and exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C01-10TI-2.7, the AT24C01C-SSHM-T offers improved manufacturability in SOIC form, while the CAT24C01HU4I-GT3 provides higher-speed 2.7V operation - both require validation of TEST pin handling and A0–A2 address decoding consistency.

Availability

AT24C01-10TI-2.7 is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, medical instrumentation, and smart sensor modules requiring stable component supply across extended product lifecycles.

Supply support for AT24C01-10TI-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 broad industrial and automotive qualification programs.

The AT24C01-10TI-2.7 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for cost-sensitive, low-power embedded systems requiring simple, robust nonvolatile storage without complex initialization sequences.

FAQ

What is the maximum I²C clock frequency supported by AT24C01-10TI-2.7 at 2.7V?

The AT24C01-10TI-2.7 supports a maximum I²C clock frequency of 100 kHz when operating at 2.7V, as specified in the AC Characteristics table. This limit ensures reliable setup/hold timing margins under worst-case voltage and temperature conditions. Higher frequencies (e.g., 400 kHz) are only guaranteed at 5.0V supply - using them at 2.7V may result in communication failures or data corruption. Always verify timing compliance using tLOW, tHIGH, and tSU.DAT values from the datasheet for your specific bus capacitance and pull-up strength.

Does AT24C01-10TI-2.7 require external pull-up resistors on SDA and SCL lines?

Yes, AT24C01-10TI-2.7 requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. The SDA pin is bidirectional and open-drain; SCL is input-only but also relies on a pull-up for proper high-level definition. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time. Failure to install pull-ups will prevent START/STOP detection and cause communication timeouts. The exact value should be calculated using I²C bus specifications and measured trace capacitance.

Can AT24C01-10TI-2.7 be used in place of AT24C01-10PI-2.7?

AT24C01-10TI-2.7 and AT24C01-10PI-2.7 share identical electrical specifications, memory organization, and I²C protocol behavior, differing only in package (TSSOP-8 vs. PDIP-8) and thermal characteristics. They are functionally interchangeable in designs where mechanical fit and PCB footprint allow. However, the TSSOP package has lower thermal resistance and higher moisture sensitivity - reflow profile and handling must comply with J-STD-020. No schematic or firmware changes are needed for substitution.

What is the purpose of the TEST pin on AT24C01-10TI-2.7?

The TEST pin on AT24C01-10TI-2.7 is a factory test input that must be externally tied to either GND or VCC - it must never be left floating. Its state determines internal test modes during production screening but has no effect during normal operation. Leaving TEST unconnected risks undefined behavior, including potential I²C bus lockup or excessive current draw. The recommended connection is GND unless application-specific testing requires VCC tie-off per Microchip's application notes.

How many write cycles can AT24C01-10TI-2.7 endure before failure?

AT24C01-10TI-2.7 is rated for 1 million write cycles per memory location, as validated under 5.0V and 25°C conditions in page write mode. This endurance applies to each of the 128 bytes individually - writing to different addresses does not consume shared wear-out budget. Real-world lifetime depends on usage pattern: writing the same byte once daily yields >2,700 years of operation. Wear leveling is unnecessary due to the high cycle count, but avoiding repeated writes to fixed locations extends effective service life in high-frequency logging applications.