Microchip Technology 24C00T-I/OT

Overview

24C00T-I/OT from Microchip Technology Inc. is a 128-bit (16 × 8) I²C-compatible serial EEPROM designed for low-overhead nonvolatile storage of calibration data, device IDs, and manufacturing traceability in space-constrained industrial systems. It operates at 4.5–5.5 V, supports 100 kHz and 400 kHz clock rates, features Schmitt-trigger inputs for noise immunity, and delivers typical standby current of 100 nA and read current of 500 µA.

For engineers reviewing the 24C00T-I/OT datasheet, 24C00T-I/OT pinout, 24C00T-I/OT application, or 24C00T-I/OT equivalent, this page provides verified electrical parameters, SOT-23-5 package mapping, I²C timing compliance details, endurance and retention specs, and validated alternative parts for design-in flexibility.

Technical Context

The 24C00T-I/OT functions as an I²C slave device with fixed 4-bit device code '1010' and three don't-care address bits, enabling up to eight devices on a shared bus. Its internal address pointer auto-increments during sequential reads and supports byte write, current address read, random read, and sequential read modes.

It employs on-chip high-voltage generation for EEPROM programming, includes V_CC threshold detection (3.8 V nominal) to inhibit writes during undervoltage, and uses acknowledge polling to determine write cycle completion-eliminating fixed delay requirements in host firmware.

Key Specifications

Pinout & Package

24C00T-I/OT is housed in a 5-lead SOT-23 (OT) package - compact (2.9 mm × 1.6 mm × 1.3 mm), surface-mount, and optimized for high-density PCB layouts. The exposed pad is not electrically connected and may be left floating or grounded per layout requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24C00T-I/OT, the 24AA00T-I/OT enables operation down to 1.8 V but lacks the 4.5–5.5 V-only robustness of the 24C00; the AT24C01C offers 8× more memory and automotive qualification but requires verifying layout compatibility despite matching pinout.

Availability

24C00T-I/OT is available at Aetrix Electronics and suitable for industrial control systems, smart sensor modules, and power supply management requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for 24C00T-I/OT 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 24XX00 family-including 24C00-is engineered for minimal-footprint, ultra-low-power nonvolatile storage in cost-sensitive industrial and consumer applications where reliability and long-term data retention are critical.

FAQ

What is the maximum I²C clock frequency supported by the 24C00T-I/OT?

The 24C00T-I/OT supports up to 400 kHz I²C clock frequency when operated within its specified 4.5–5.5 V supply range. At this rate, timing parameters including THIGH (≥600 ns), TLOW (≥1300 ns), and TSU:DAT (≥100 ns) remain fully compliant per DS20001178J-page 3. Operation above 400 kHz is not guaranteed and may result in communication failures.

Does the 24C00T-I/OT require external pull-up resistors on SDA and SCL lines?

Yes, the 24C00T-I/OT requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. For 400 kHz operation, a 2 kΩ pull-up to VCC is recommended; for 100 kHz, 10 kΩ is typical. Values must be selected based on bus capacitance and rise-time requirements defined in Figure 1-1 and Table 1-2 of the datasheet.

Can the 24C00T-I/OT be used in automotive applications?

No, the 24C00T-I/OT is rated for Industrial temperature range (-40°C to +85°C) only. While the broader 24XX00 family includes Automotive-grade variants (e.g., 24C00-E/OT), the 'I' suffix in 24C00T-I/OT explicitly denotes Industrial qualification and does not meet AEC-Q100 requirements for automotive under-hood or infotainment use.

How many times can the 24C00T-I/OT be rewritten before failure?

The 24C00T-I/OT is characterized for more than 1 million erase/write cycles per memory location. This endurance rating is ensured through process characterization (not 100% tested) and applies across the full Industrial temperature range. Field lifetime depends on actual usage patterns, but typical applications exceed 10 years even with daily writes.

Is the NC pin on the 24C00T-I/OT required to be connected or left floating?

The NC pin on the 24C00T-I/OT must be left unconnected - it is internally not bonded and has no electrical function. Routing traces to or placing solder pads for this pin is unnecessary and may introduce unintended coupling or assembly defects. Per Microchip's Pin Function Table (DS20001178J-page 4), it is designated "Not Connected" across all package types including SOT-23-5.