Microchip Technology 24LC01B-E/SN

Overview

24LC01B-E/SN from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory with hardware write-protection, 400 kHz max clock frequency, and operation from 2.5V to 5.5V. It supports page writes (up to 8 bytes), features Schmitt-trigger inputs and slope-controlled outputs, and is rated for Industrial (–40°C to +85°C) and Extended (–40°C to +125°C) temperature ranges. It is used in embedded system configuration storage where low-power nonvolatile memory with I²C interface is required.

For engineers reviewing the 24LC01B-E/SN datasheet, 24LC01B-E/SN pinout, 24LC01B-E/SN application, or 24LC01B-E/SN equivalent, key selection criteria include VCC range (2.5–5.5 V), I²C speed grade (400 kHz), write-protect functionality, package compatibility (SOIC-8), and endurance (>1 million cycles).

Technical Context

The 24LC01B-E/SN implements a two-wire I²C interface with fixed 7-bit device address (1010xxx) and R/W bit control. Its internal architecture includes an 8-byte page buffer, self-timed erase/write cycle, and address pointer that auto-increments during sequential reads. The device uses CMOS EEPROM technology with on-chip high-voltage generator for programming.

It supports three read modes - current address, random, and sequential - and employs acknowledge polling to detect write completion. Noise immunity is ensured via Schmitt-trigger inputs and input filter spike suppression (50 ns), while output slew rate control minimizes ground bounce during SDA transitions.

Key Specifications

Pinout & Package

24LC01B-E/SN is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package with 150 mil body width (SN suffix per Microchip marking convention). Pin 1 is marked with a beveled corner or dot; leads are matte tin-plated.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC01B-E/SN, the 24AA01-I/SN enables lower-voltage operation but sacrifices extended temperature support, while the 24FC01-I/SN delivers higher I²C bandwidth at the cost of reduced write-cycle margin at low VCC - both require validation of WP behavior and timing compliance in target systems.

Availability

24LC01B-E/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical diagnostic device settings, and smart energy meter firmware patch storage requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for 24LC01B-E/SN 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 Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24LC01B belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, space-constrained embedded systems requiring reliable, low-power nonvolatile storage with industry-standard I²C interface compatibility.

FAQ

What is the minimum VCC voltage required for reliable operation of the 24LC01B-E/SN?

The 24LC01B-E/SN requires a minimum VCC of 2.5 V for guaranteed operation across its full temperature range. Operation below 2.5 V is not supported - unlike the 24AA01 or 24FC01 variants - and may result in undefined behavior or failed write cycles. This is explicitly defined in the Device Selection Table and Electrical Characteristics section of the DS20001711M datasheet.

Does the 24LC01B-E/SN support 1 MHz I²C communication?

No, the 24LC01B-E/SN does not support 1 MHz I²C. Its maximum clock frequency is 400 kHz at VCC ≥ 2.5 V. The 24FC01 variant is the only part in the 24XX01 family rated for 1 MHz operation. Attempting 1 MHz clocking on the 24LC01B-E/SN will violate AC timing specifications and likely cause communication failures.

How many write/erase cycles can the 24LC01B-E/SN endure before failure?

The 24LC01B-E/SN is specified for more than 1,000,000 erase/write cycles at 25°C and 5.5 V, measured in page mode. This endurance rating is validated per JEDEC standards and applies across the full Industrial and Extended temperature ranges. Field reliability models project functional longevity well beyond typical product lifecycles when operated within datasheet limits.

What is the function of the A0, A1, and A2 pins on the 24LC01B-E/SN?

The A0, A1, and A2 pins on the 24LC01B-E/SN are not internally connected and serve no functional purpose. As confirmed in Section 2.1 and Table 2-1 of the DS20001711M datasheet, they may be left floating or tied to VSS or VCC without affecting device operation or I²C addressing - the device uses a fixed 4-bit control code (1010) with "don't care" bits for block selection.

Is the 24LC01B-E/SN AEC-Q100 qualified?

Yes, the 24LC01B-E/SN is AEC-Q100 qualified for automotive applications. This qualification is explicitly stated in the Features section of the DS20001711M datasheet and applies to the Extended temperature grade (–40°C to +125°C), making it suitable for use in body electronics, infotainment, and other non-safety-critical automotive subsystems.