Microchip Technology AT24C04-10TI-1.8

Overview

AT24C04-10TI-1.8 from Microchip Technology (formerly Atmel) is a 4-kbit (512 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage embedded systems. It operates from 1.8 V to 5.5 V, supports 100 kHz I²C bus timing at 1.8 V, features hardware write protection via the WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in battery-powered IoT sensors for nonvolatile configuration storage.

For engineers reviewing the AT24C04-10TI-1.8 datasheet, AT24C04-10TI-1.8 pinout, AT24C04-10TI-1.8 application, or AT24C04-10TI-1.8 equivalent, key selection criteria include 1.8 V minimum supply compatibility, industrial temperature range (−40°C to +85°C), TSSOP-8 packaging, page-write capability (16-byte pages), and Schmitt-triggered noise-immune inputs.

Technical Context

The AT24C04-10TI-1.8 implements a two-wire I²C interface with open-drain SDA/SCL pins, requiring external pull-ups. Its internal memory is organized as 32 pages of 16 bytes each, supporting both byte and page writes with automatic address incrementing within pages.

It uses hard-wired A2 and A1 pins for device addressing (A0 is NC), enabling up to four AT24C04 devices on a single I²C bus. The WP pin provides hardware-level write protection: tied to VCC, it locks the full 4K array; tied to GND, full read/write access is enabled.

Key Specifications

Pinout & Package

AT24C04-10TI-1.8 is housed in an 8-lead TSSOP package (JEDEC MO-153, 0.170" wide), with 0.65 mm lead pitch and exposed pad not connected. This compact surface-mount package supports high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C04-10PI-1.8 and M24C04-RMN6TP, the AT24C04-10TI-1.8 uniquely combines TSSOP-8 packaging, guaranteed 100 kHz operation at 1.8 V, 1 million write cycles, and Microchip's industrial lifecycle support - making it optimal for high-reliability, space-constrained embedded designs.

Availability

AT24C04-10TI-1.8 is available at Aetrix Electronics and suitable for smart meter calibration storage, industrial PLC configuration backup, medical sensor device identity, and automotive body control module settings requiring stable component supply across extended product lifecycles.

Supply support for AT24C04-10TI-1.8 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 is a global semiconductor company specializing in microcontrollers, analog components, and nonvolatile memory solutions, with a focus on embedded control and connectivity.

The AT24C04-10TI-1.8 belongs to Microchip's AT24Cxx family of I²C serial EEPROMs, designed specifically for low-voltage, low-power, and industrial-grade data logging and configuration storage in resource-constrained embedded systems.

FAQ

What is the maximum I²C clock frequency supported by AT24C04-10TI-1.8 at 1.8 V?

The AT24C04-10TI-1.8 supports a maximum I²C clock frequency of 100 kHz when operating at 1.8 V. This is explicitly specified in the AC Characteristics table under "2.7-, 2.5-, 1.8-volt" conditions. At higher supply voltages (e.g., 5.0 V), it supports up to 400 kHz, but that rating does not apply to the AT24C04-10TI-1.8 variant.

Is the A0 pin functional on AT24C04-10TI-1.8?

No - the A0 pin on AT24C04-10TI-1.8 is designated as "No Connect" (NC) per the official datasheet. Only A1 and A2 are used for device addressing in the AT24C04 family; A0 is internally unconnected and must remain floating or unconnected on the PCB.

How many devices can share the same I²C bus with AT24C04-10TI-1.8?

Up to four AT24C04-10TI-1.8 devices can coexist on a single I²C bus. This is achieved using the A1 and A2 address pins, which provide two binary bits (00, 01, 10, 11) to generate unique 7-bit slave addresses. A0 is not used for addressing in this part.

What happens when the WP pin is tied to VCC on AT24C04-10TI-1.8?

When the WP pin of AT24C04-10TI-1.8 is tied to VCC, hardware write protection is activated and the entire 4K memory array becomes read-only. All write attempts - including byte writes, page writes, and write commands - are ignored. Only read operations remain functional until WP is returned to GND.

Does AT24C04-10TI-1.8 support partial page writes?

Yes - AT24C04-10TI-1.8 supports partial page writes. After initiating a page write, the host controller may transmit fewer than 16 bytes; the EEPROM accepts them sequentially and automatically increments the internal address pointer. No alignment or padding is required, simplifying variable-length data storage.