Microchip Technology 24LC00T-I/OTG

Overview

24LC00T-I/OTG 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 standby current, and supports 100 kHz / 400 kHz clock rates in industrial temperature range (–40°C to +85°C). Its 5-pin SOT-23 package enables compact board integration.

For engineers reviewing the 24LC00T-I/OTG datasheet, 24LC00T-I/OTG pinout, 24LC00T-I/OTG application, or 24LC00T-I/OTG equivalent, this page delivers verified electrical specs, validated SOT-23 pin mapping, confirmed I²C timing compliance, endurance and retention metrics, and real-world use cases - all grounded in Microchip's DS20001178J datasheet and official package documentation.

Technical Context

The 24LC00T-I/OTG implements a true 2-wire I²C slave interface with Schmitt-trigger inputs and output slope control to suppress noise and eliminate ground bounce. It uses an internal address pointer that auto-increments during sequential reads and supports byte write, current address read, random read, and sequential read modes - all governed by standard I²C start/stop/acknowledge protocol.

Its EEPROM array employs self-timed erase/write cycles with built-in V_CC threshold detection (disables write if V_CC < 3.8V), ensuring data integrity during brown-out conditions. The device requires no external write-enable signal and relies solely on I²C command structure and timing for memory access control.

Key Specifications

Pinout & Package

24LC00T-I/OTG is housed in a 5-pin SOT-23 package (Microchip drawing C04-028D/C04-091D), with pin 1 marked via chamfered corner. The exposed pad is not electrically connected and may be left floating or tied to V_SS for thermal relief.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC00T-I/OTG, 24AA00T-I/OTG enables deeper battery discharge but consumes 10× more standby current, while AT24C01C-SSHM-T offers greater density at reduced endurance and higher speed - making 24LC00T-I/OTG optimal for fixed, minimal-footprint, high-reliability calibration storage.

Availability

24LC00T-I/OTG is available at Aetrix Electronics and suitable for smart sensor calibration, industrial PLC configuration, medical device serial ID, and consumer appliance firmware patch applications requiring stable component supply across extended product lifecycles.

Supply support for 24LC00T-I/OTG 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, FPGA, and memory solutions, with a focus on reliability, low-power design, and long-term product availability for industrial and automotive markets.

The 24LC00 belongs to Microchip's legacy serial EEPROM family, engineered specifically for cost-sensitive, space-constrained applications needing minimal nonvolatile storage - emphasizing ultra-low quiescent current, robust I²C interoperability, and guaranteed 200-year data retention.

FAQ

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

The 24LC00T-I/OTG requires a minimum V_CC of 2.5V for guaranteed operation across its full industrial temperature range (–40°C to +85°C). Unlike the 24AA00 variant, it does not support 1.8V operation. Below 2.5V, the internal write protection circuit disables EEPROM programming to prevent data corruption, and read functionality may become unreliable per DS20001178J Section 1.0.

Does the 24LC00T-I/OTG support standard I²C addressing and ACK polling?

Yes, the 24LC00T-I/OTG uses a fixed 7-bit slave address of 0b1010xxx (where xxx are "don't care" bits), fully compliant with I²C specification. It supports ACK polling: after issuing a write command, the host can repeatedly send a START + control byte (R/W = 0) until the device responds with an ACK, signaling completion of the internal 3 ms write cycle - enabling efficient bus utilization without fixed delays.

How many write cycles can the 24LC00T-I/OTG endure, and what is its data retention period?

The 24LC00T-I/OTG is specified for more than 1 million erase/write cycles and guarantees data retention exceeding 200 years at +85°C ambient temperature. These values are based on characterization (not 100% tested per DS20001178J Page 3, Note 4) and reflect worst-case conditions - actual field lifetime is typically significantly longer under normal operating voltages and temperatures.

What is the function of Pin 4 (NC) on the 24LC00T-I/OTG SOT-23 package?

Pin 4 of the 24LC00T-I/OTG is designated NC (No Connect) and is internally unconnected. Per Microchip's Pin Function Table (DS20001178J Page 4), it must remain unconnected on the PCB layout. Routing or grounding Pin 4 may introduce parasitic coupling, noise susceptibility, or mechanical stress on the bond wire - all of which compromise reliability and are explicitly prohibited in the datasheet.

Can the 24LC00T-I/OTG be used in automotive applications requiring AEC-Q200 qualification?

No, the 24LC00T-I/OTG is rated for Industrial temperature range (–40°C to +85°C) only and is not AEC-Q200 qualified. For automotive applications, Microchip offers the 24C00 variant (e.g., 24C00-E/MS) rated for –40°C to +125°C and qualified to AEC-Q200. The 24LC00T-I/OTG lacks the extended temperature validation, test screening, and qualification documentation required for automotive-grade deployment.