Microchip Technology AT24C01-10PC-2.7

Overview

AT24C01-10PC-2.7 from Microchip Technology (formerly Atmel) is a 1K-bit (128 × 8) serial EEPROM with 2-wire I²C-compatible interface, optimized for low-voltage embedded systems operating from 2.7V to 5.5V. It supports 100 kHz clock frequency, 4-byte page write mode, self-timed 10 ms max write cycle, and delivers 1 million write endurance with 100-year data retention - deployed in industrial sensor calibration storage and automotive body control modules.

For engineers reviewing the AT24C01-10PC-2.7 datasheet, AT24C01-10PC-2.7 pinout, AT24C01-10PC-2.7 application, or AT24C01-10PC-2.7 equivalent, key selection criteria include VCC range compatibility (2.7–5.5V), SOIC-8 package footprint, I²C timing compliance at 100 kHz, standby current ≤4 µA at 2.7V, and page-write capability for firmware parameter updates.

Technical Context

The AT24C01-10PC-2.7 implements a fixed 7-bit I²C slave address with three hardware address pins (A0–A2), enabling up to eight devices on a shared bus. Its memory array is organized as 128 individually addressable bytes, accessed via 7-bit word addressing without internal address rollover across pages.

It uses open-drain SDA/SCL signaling with bidirectional data transfer, requiring external pull-up resistors. The device enters standby mode after STOP condition completion and supports ACK polling to detect write-cycle completion - critical for deterministic firmware update sequences in resource-constrained microcontrollers.

Key Specifications

Pinout & Package

AT24C01-10PC-2.7 is supplied in an 8-pin JEDEC-standard SOIC package (package code 8S1), 3.90 mm × 4.90 mm footprint, 1.27 mm lead pitch, with gull-wing leads suitable for reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C01-10PC-2.7, M24C01-RMN6TP offers faster I²C throughput but requires timing revalidation, while CAT24C01WI-GT3 provides automotive qualification and eliminates TEST pin complexity - both retain 1K capacity and SOIC-8 compatibility but differ in voltage margin, speed, and qualification scope.

Availability

AT24C01-10PC-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, smart energy metering, and medical diagnostic handhelds requiring stable component supply across multi-year production cycles.

Supply support for AT24C01-10PC-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 acquired Atmel in 2016 and maintains full product continuity, technical documentation, and long-term supply commitment for the AT24Cxx EEPROM family.

The AT24Cxx series was designed specifically for cost-sensitive, low-power embedded systems needing reliable, byte-addressable nonvolatile storage - targeting industrial automation, automotive subsystems, and consumer electronics with stringent size and power constraints.

FAQ

What is the maximum clock frequency supported by AT24C01-10PC-2.7?

The AT24C01-10PC-2.7 supports a maximum I²C clock frequency of 100 kHz when operated within its 2.7V to 5.5V supply range. This is specified in the AC Characteristics table under fSCL for 2.7-, 2.5-, and 1.8-volt versions. Higher speeds (e.g., 400 kHz) apply only to the 5.0V variant (AT24C01-10PC), not the -2.7 suffix version. Designers must adhere to this limit to ensure reliable acknowledge timing and data setup/hold compliance.

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

Yes, AT24C01-10PC-2.7 requires external pull-up resistors on both SDA and SCL lines because it uses open-drain outputs. The datasheet specifies that SDA and SCL are open-drain driven and may be wire-ORed with other open-drain devices. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time; 4.7 kΩ is commonly used for 100 kHz operation with moderate trace length.

What is the function of the TEST pin on AT24C01-10PC-2.7?

The TEST pin on AT24C01-10PC-2.7 is a factory test input that must be externally tied to either GND or VCC - it must never be left floating. During production, it is used for internal wafer-level testing; in end-user applications, its state affects internal logic behavior and leaving it unconnected risks undefined operation or increased current draw. The datasheet explicitly states "TEST must be externally tied to GND or VCC" - no functional role exists in normal operation.

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

AT24C01-10PC-2.7 is rated for 1 million write cycles per memory location, as confirmed in the "High Reliability" section and AC Characteristics table (Endurance = 1M Write Cycles). This endurance applies under recommended operating conditions (VCC = 2.7V to 5.5V, TA = 0°C to 70°C). Wear leveling is not implemented internally, so repeated writes to the same address will consume endurance proportionally - system firmware should distribute writes across addresses if extended lifetime is required.

Is AT24C01-10PC-2.7 compatible with standard I²C protocol implementations?

Yes, AT24C01-10PC-2.7 implements a standard two-wire serial interface fully compatible with the I²C-bus specification, including START/STOP conditions, 7-bit slave addressing with R/W bit, and ACK/NACK handshaking. It supports bidirectional data transfer using open-drain signaling and adheres to I²C timing requirements for 100 kHz operation - enabling direct connection to any MCU with a compliant I²C peripheral without protocol translation or additional logic.