Microchip Technology AT24C01-10PI-2.7

Overview

AT24C01-10PI-2.7 from Microchip Technology (formerly Atmel) is a 1K-bit serial EEPROM IC optimized for low-voltage industrial applications. It features 128 × 8-bit memory organization, 2-wire I²C-compatible interface, 100 kHz clock support at 2.7V, and operates across 2.7V–5.5V supply range. It delivers high reliability with 1 million write cycles and 100-year data retention in an 8-lead PDIP package.

For engineers reviewing the AT24C01-10PI-2.7 datasheet, AT24C01-10PI-2.7 pinout, AT24C01-10PI-2.7 application, or AT24C01-10PI-2.7 equivalent, key selection considerations include its 2.7V minimum operating voltage, 4-byte page write capability, PDIP package compatibility with through-hole prototyping, and automotive-grade temperature range (-40°C to +85°C).

Technical Context

The AT24C01-10PI-2.7 implements a standard I²C-compatible 2-wire serial interface with open-drain SDA and edge-triggered SCL pins. It supports bidirectional data transfer using acknowledge polling and adheres to I²C timing requirements including tLOW ≥ 4.7 µs and tHIGH ≥ 4.0 µs at 2.7V operation.

Internally, it uses a 7-bit word address space to access 128 bytes of nonvolatile memory, with automatic address increment during sequential reads and page-boundary rollover during 4-byte page writes. Memory reset recovery is supported via 9-clock cycle synchronization after bus interruption.

Key Specifications

Pinout & Package

AT24C01-10PI-2.7 is housed in an 8-lead Plastic Dual Inline Package (PDIP), 0.300" wide body, compliant with JEDEC MS-001 BA. Pin 1 is located at the top-left corner when viewed from top with notch or dot indicator.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C01-10PI-2.7, M24C01-RMN6TP enables faster communication in SMT layouts, while CAT24C01WI-GT3 reduces standby leakage by ~30% - both require layout changes due to different packages and lack PDIP availability.

Availability

AT24C01-10PI-2.7 is available at Aetrix Electronics and suitable for industrial control systems, smart metering platforms, and automotive body electronics requiring stable component supply and long-term obsolescence management.

Supply support for AT24C01-10PI-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 capabilities.

The AT24C01-10PI-2.7 belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring simple, robust nonvolatile storage without complex interface overhead.

FAQ

What is the maximum clock frequency supported by AT24C01-10PI-2.7 at 2.7V operation?

The AT24C01-10PI-2.7 supports a maximum I²C clock frequency of 100 kHz when operated at 2.7V. This is specified in the AC Characteristics table under fSCL for "2.7-, 2.5-, 1.8-volt" conditions. Higher frequencies (e.g., 400 kHz) are only guaranteed at 5.0V supply, per the datasheet's voltage-dependent timing specifications.

Does AT24C01-10PI-2.7 support page write operations, and how many bytes can be written per page?

Yes, AT24C01-10PI-2.7 supports 4-byte page write mode. After initiating a write with a valid address, the device accepts up to three additional bytes before requiring a STOP condition. The internal address pointer increments automatically within the same 4-byte boundary, enabling efficient multi-byte updates without repeated start conditions.

What is the function of the TEST pin on AT24C01-10PI-2.7, and how should it be connected?

The TEST pin on AT24C01-10PI-2.7 is a factory test terminal with no functional role in normal operation. Per the datasheet, it must be connected either to GND or VCC - floating is not permitted. For industrial applications, tying TEST to GND is recommended unless specific test-mode access is required during production testing.

Can AT24C01-10PI-2.7 be used in automotive applications, and what qualification does it meet?

AT24C01-10PI-2.7 is rated for industrial temperature range (-40°C to +85°C) and is explicitly listed as "Automotive Grade" in the Features section. While not AEC-Q100 certified as a standalone part, its extended temperature rating and reliability specs (1M write cycles, 100-year retention) make it suitable for non-safety-critical automotive body electronics where full qualification is not mandated.

How does AT24C01-10PI-2.7 handle bus arbitration and acknowledge polling during write cycles?

AT24C01-10PI-2.7 uses standard I²C acknowledge polling: after issuing a write command, the host sends repeated START + device address (R/W = 0) until the EEPROM responds with ACK, signaling completion of the internal 10 ms write cycle. No bus arbitration logic is embedded - the device relies on external master control and open-drain bus discipline per I²C specification.