Microchip Technology 24LC00T-I/SN

Overview

24LC00T-I/SN from Microchip Technology Inc. is a 128-bit (16 × 8) I²C-compatible serial EEPROM designed for low-power, space-constrained applications requiring nonvolatile storage of calibration data, device IDs, or manufacturing parameters. It operates from 2.5V to 5.5V, draws only 500 µA typical read current and 100 nA typical standby current, and supports 100 kHz/400 kHz clock rates in industrial temperature range (–40°C to +85°C). The device uses Schmitt-trigger inputs and slope-controlled outputs for robust noise immunity on shared buses.

For engineers reviewing the 24LC00T-I/SN datasheet, 24LC00T-I/SN pinout, 24LC00T-I/SN application, or 24LC00T-I/SN equivalent, key selection criteria include its 2.5V minimum VCC, ultra-low standby current, 5-pin SOT-23 package footprint, guaranteed 1 million write cycles, and 200-year data retention - all validated for industrial-grade embedded systems with tight power and board-area budgets.

Technical Context

The 24LC00T-I/SN implements a slave-only I²C interface with fixed 7-bit address (1010xxx) and no address pins, enabling single-device bus deployment without address conflicts. Its internal architecture includes a 128-bit EEPROM array, address pointer logic, and self-timed erase/write cycle control with VCC threshold detection (disabled below 2.5V).

It features Schmitt-trigger inputs on SDA and SCL with ≥50 mV hysteresis and input filter spike suppression ≤50 ns, ensuring reliable operation in electrically noisy environments. Write cycle time is 3 ms typical, with ACK polling support to synchronize host firmware without fixed delays.

Key Specifications

Pinout & Package

24LC00T-I/SN is supplied in a 5-lead SOT-23 package (JEDEC TO-236AB), with 1.90 mm × 1.30 mm footprint and 0.95 mm lead pitch. Pin 1 is SCL, Pin 2 is VSS, Pin 3 is SDA, Pin 4 is NC, Pin 5 is VCC. The NC pin is internally unconnected and must not be tied to any net.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA00T-I/SN and AT24C01C-SSHM-T, the 24LC00T-I/SN delivers the lowest standby current in its voltage class and is the only one qualified for factory programming - making it the preferred choice for industrial ID storage where power budget and traceability are critical.

Availability

24LC00T-I/SN is available at Aetrix Electronics and suitable for industrial sensors, medical diagnostics equipment, and consumer appliance control modules requiring stable component supply, long-life data retention, and RoHS-compliant packaging.

Supply support for 24LC00T-I/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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24LC00 belongs to Microchip's legacy serial EEPROM product line, engineered specifically for cost-sensitive, low-power embedded systems needing minimal nonvolatile storage with guaranteed industrial reliability and long-term data integrity.

FAQ

What is the minimum supply voltage required for reliable operation of the 24LC00T-I/SN?

The 24LC00T-I/SN requires a minimum VCC of 2.5V for guaranteed functional operation across the full industrial temperature range (–40°C to +85°C). Below this threshold, the internal voltage detector disables write operations to prevent data corruption. This distinguishes it from the 24AA00 variant, which supports down to 1.8V. The 24LC00T-I/SN is therefore optimized for 3.3V and 5V systems where ultra-low voltage operation is not required.

Does the 24LC00T-I/SN support multi-master I²C bus configurations?

Yes, the 24LC00T-I/SN fully complies with the standard I²C protocol and functions as a slave device in multi-master bus topologies. It responds only to its fixed 7-bit address (1010xxx) and generates ACK/NACK as specified. However, it does not arbitrate bus ownership or generate START/STOP conditions - those responsibilities reside solely with the master controller(s). Bus contention handling must be implemented at the master level per I²C specification.

Can the NC pin on the 24LC00T-I/SN be used for grounding or thermal dissipation?

No - the NC (No Connect) pin on the 24LC00T-I/SN is internally unconnected and must not be bonded to VSS, VCC, or any signal net. Microchip's datasheet explicitly states it is not intended for thermal relief or grounding. Connecting it may cause unpredictable behavior or damage. For thermal management, rely on the exposed copper pad (if present in variant packages) or PCB copper pour under the device body - but the SOT-23 variant has no exposed pad.

How many times can the 24LC00T-I/SN be rewritten before failure?

The 24LC00T-I/SN is rated for more than 1 million erase/write cycles per memory location, as confirmed by Microchip's characterization testing. This endurance rating applies under recommended operating conditions (VCC = 2.5V–5.5V, TA = –40°C to +85°C) and assumes proper I²C timing and voltage compliance. Field reliability data shows no degradation below specification up to 1M cycles, supporting daily reprogramming in test and calibration equipment over 27 years.

Is factory programming available for the 24LC00T-I/SN, and what data formats are supported?

Yes, factory programming is available for the 24LC00T-I/SN through Microchip's certified programming services. Supported data includes ASCII/HEX strings, binary calibration coefficients, or serialized identifiers (e.g., MAC addresses, UDI codes), pre-written into the 128-bit memory array prior to shipment. Programming is performed at wafer or unit level with full traceability, and the 24LC00T-I/SN marking "I/SN" indicates industrial-temp, SOT-23 packaging - both compatible with Microchip's standard programming flow.