Microchip Technology AT24C01-10PC

Overview

AT24C01-10PC from Atmel (now Microchip) is a 1K-bit (128 × 8) serial EEPROM with 2-wire I²C-compatible interface, operating from 2.7V to 5.5V, supporting 100 kHz clock frequency, and housed in an 8-pin PDIP package. It delivers nonvolatile data storage for microcontroller-based systems requiring low-power, space-constrained, and industrial-grade memory retention in embedded control, sensor calibration, and configuration storage applications.

For engineers reviewing the AT24C01-10PC datasheet, AT24C01-10PC pinout, AT24C01-10PC application, or AT24C01-10PC equivalent, key selection considerations include its 2.7–5.5V supply range, 100 kHz I²C timing compliance, 4-byte page write capability, 1 million write endurance, and commercial temperature grade (0°C to +70°C) in PDIP packaging.

Technical Context

The AT24C01-10PC implements a fixed 128-word × 8-bit memory array accessed via a bidirectional open-drain SDA line and edge-triggered SCL clock. Its internal address counter supports byte and sequential read operations, while page write mode enables up to four bytes per transaction without address retransmission.

It uses standard I²C protocol semantics - including START/STOP conditions, 7-bit slave addressing with A0–A2 pins unconnected (NC), ACK polling for write completion detection, and automatic address rollover at page boundaries. The TEST pin is tied to GND or VCC per application; NC pins are unused and must remain floating or unconnected.

Key Specifications

Pinout & Package

AT24C01-10PC is supplied in an 8-pin Plastic Dual Inline Package (PDIP), designated as 8P3 per Atmel's ordering table. Pin 1 is marked with a notch or dot; the package is lead-free and RoHS-compliant per standard Atmel manufacturing practice.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C01-10PC, the 24LC01B-I/P extends temperature range without layout change, while CAT24C01WI-GT3 trades through-hole compatibility for speed and size - making AT24C01-10PC optimal for cost-sensitive, commercial-grade, through-hole prototyping and legacy production.

Availability

AT24C01-10PC is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer device configuration, embedded firmware metadata storage, and power supply sequencing log applications requiring stable component supply, long-lifecycle availability, and through-hole assembly compatibility.

Supply support for AT24C01-10PC 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 (formerly Atmel) is a global semiconductor company specializing in microcontrollers, analog components, and nonvolatile memory solutions for embedded systems.

The AT24C01 series was designed as a cost-optimized, pin-compatible family of I²C EEPROMs targeting space- and power-constrained applications in industrial controls, consumer electronics, and automotive subsystems.

FAQ

What is the operating voltage range of the AT24C01-10PC?

The AT24C01-10PC operates from 2.7V to 5.5V DC. This dual-range capability allows it to interface reliably with both modern low-voltage microcontrollers and legacy 5V logic systems without level-shifting circuitry. Its specified 100 kHz I²C timing is validated across this full voltage span, ensuring consistent bus performance in mixed-voltage designs where the AT24C01-10PC serves as configuration memory.

Does the AT24C01-10PC support page write operations?

Yes, the AT24C01-10PC supports 4-byte page write mode, allowing up to four consecutive bytes to be written in a single I²C transaction after the initial address byte. This reduces bus overhead compared to individual byte writes and accelerates bulk configuration updates. The internal address pointer increments automatically within the same 4-byte page boundary, and the AT24C01-10PC does not cross pages - rollover occurs only within the current page.

What is the maximum write endurance and data retention for the AT24C01-10PC?

The AT24C01-10PC guarantees 1 million write/erase cycles and 100 years of data retention at +25°C. These specifications are measured under standard commercial conditions and reflect actual endurance testing - not extrapolated projections. For applications involving frequent parameter updates, such as calibration logging, the AT24C01-10PC provides sufficient margin to exceed typical product lifetimes without data corruption risk.

How is the AT24C01-10PC packaged, and what are its mounting characteristics?

The AT24C01-10PC is supplied in an 8-pin Plastic Dual Inline Package (PDIP), designated 8P3, with 0.300-inch body width and standard 0.100-inch pin pitch. It is through-hole mountable, compatible with manual soldering, wave soldering, and socket-based test fixtures. The package contains three NC pins (1–3), eliminating routing constraints and simplifying PCB layout for the AT24C01-10PC in prototyping and low-volume production environments.

Can the AT24C01-10PC be used in I²C bus systems with other slave devices?

Yes, the AT24C01-10PC uses a standard 7-bit I²C slave address (1010xxx binary) with A0–A2 pins unconnected (NC), fixing its base address to 0x50. It fully complies with I²C bus arbitration, START/STOP detection, and ACK/NACK protocols - enabling coexistence with multiple slaves on the same bus. Its open-drain SDA/SCL pins support wired-AND topology, and the AT24C01-10PC responds only to its assigned address, ensuring deterministic multi-device communication.