Microchip Technology 24LC00/SN

Overview

24LC00/SN from Microchip Technology Inc. is a 128-bit I²C-compatible serial EEPROM organized as 16 × 8, designed for low-power nonvolatile storage of calibration data, device IDs, or manufacturing parameters in space-constrained systems. It operates from 2.5V to 5.5V, draws only 500 µA typical read current and 100 nA standby current, and supports 100 kHz/400 kHz clock rates in industrial temperature range (–40°C to +85°C).

For engineers reviewing the 24LC00/SN datasheet, 24LC00/SN pinout, 24LC00/SN application, or 24LC00/SN equivalent, key selection criteria include its 5-pin SOT-23 package compatibility, Schmitt-trigger noise immunity on SDA/SCL, self-timed 3 ms write cycle, and guaranteed >1 million erase/write cycles with >200-year data retention.

Technical Context

The 24LC00/SN functions exclusively as an I²C slave device, responding to a fixed 7-bit address prefix '1010' followed by three don't-care bits and a R/W bit. Its internal address pointer auto-increments during sequential reads and retains position after byte writes.

It implements open-drain SDA/SCL interfaces with integrated Schmitt triggers and input filtering (50 ns spike suppression), enabling robust operation on noisy buses without external components. Write operations are internally timed and disable acknowledge until completion, supporting ACK polling for bus efficiency.

Key Specifications

Pinout & Package

24LC00/SN is supplied in a Pb-free, RoHS-compliant 5-pin SOT-23 package (Microchip drawing C04-028D). The exposed pad is not electrically connected and may be left floating or grounded for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC00/SN, 24AA00/SN enables lower-voltage operation at identical cost and size, while AT24C01C-SSHM-T trades pin compatibility for greater density-making it suitable for designs needing headroom beyond 128 bits without board redesign.

Availability

24LC00/SN is available at Aetrix Electronics and suitable for smart sensor calibration, industrial PLC configuration, and medical device serial ID applications requiring stable component supply across extended product lifecycles.

Supply support for 24LC00/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 microcontroller, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24LC00 belongs to Microchip's legacy serial EEPROM family, engineered specifically for ultra-low-power, space-constrained embedded systems needing reliable, low-cost nonvolatile storage of minimal configuration data.

FAQ

What is the minimum operating voltage for the 24LC00/SN?

The 24LC00/SN requires a minimum supply voltage of 2.5V, as specified in the Device Selection Table and DC Characteristics section of DS20001178J. Operation below this threshold disables internal write logic via a built-in VCC threshold detector, preventing incomplete or corrupted EEPROM writes. This distinguishes it from the 24AA00/SN variant, which supports down to 1.8V.

Does the 24LC00/SN support both 100 kHz and 400 kHz I²C clock speeds?

Yes, the 24LC00/SN fully supports standard-mode (100 kHz) and fast-mode (400 kHz) I²C operation across its rated voltage and temperature ranges. AC timing parameters-including THIGH, TLOW, TSU:STA, and TAA-are explicitly characterized for both frequencies in Table 1-2 of DS20001178J, ensuring interoperability with common I²C masters without timing margin violations.

How many write cycles can the 24LC00/SN endure before failure?

The 24LC00/SN is rated for more than 1 million erase/write cycles, as confirmed in the Features section and Table 1-2 (Endurance) of DS20001178J. This specification is ensured through characterization-not 100% tested-and reflects real-world endurance under recommended operating conditions, making it suitable for applications involving periodic field updates or counter logging.

What is the function of the NC pin on the 24LC00/SN in SOT-23 package?

The NC (No Connect) pin on the 24LC00/SN is physically present in the 5-pin SOT-23 package but internally unconnected. Per Pin Function Table on page 4 of DS20001178J, it must remain unconnected on the PCB to avoid unintended coupling, ESD discharge paths, or parasitic capacitance that could degrade I²C signal integrity or increase standby current.

Can the 24LC00/SN retain data for more than 200 years?

Yes, the 24LC00/SN guarantees data retention exceeding 200 years under normal operating conditions (TA ≤ +85°C, VCC ≥ 2.5V), as stated in the Features section and confirmed in characterization reports referenced in Microchip documentation. This longevity is achieved through optimized floating-gate oxide thickness and charge-trapping design, independent of write cycle count.