Microchip Technology AT24C02-10PI-1.8

Overview

AT24C02-10PI-1.8 from Microchip Technology (formerly Atmel) is a 2K-bit (256 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage embedded systems. It operates from 1.8V to 5.5V, supports 100 kHz I²C communication, features hardware write protection via the WP pin, and delivers 1 million write cycles with 100-year data retention - ideal for battery-powered sensor nodes and industrial control configuration storage.

For engineers reviewing the AT24C02-10PI-1.8 datasheet, AT24C02-10PI-1.8 pinout, AT24C02-10PI-1.8 application, or AT24C02-10PI-1.8 equivalent, key selection criteria include its 1.8V minimum supply, 8-byte page write capability, industrial temperature range (–40°C to +85°C), JEDEC SOIC-8 package, and I²C bus address flexibility via A0–A2 pins.

Technical Context

The AT24C02-10PI-1.8 implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA and SCL inputs, enabling robust operation in electrically noisy environments. Its internal architecture organizes 256 words of 8-bit memory across 32 pages of 8 bytes each, requiring an 8-bit word address for random access.

Write protection is enforced exclusively through the dedicated WP pin: tied to VCC, it locks the entire 2K array; tied to GND, full read/write access is enabled. The device enters low-power standby mode automatically after STOP condition detection and internal operations completion.

Key Specifications

Pinout & Package

AT24C02-10PI-1.8 is supplied in an 8-lead JEDEC-standard SOIC (8S1) package, measuring 4.9 mm × 3.9 mm × 1.75 mm, with gull-wing leads compatible with standard reflow soldering processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M24C02-RMN6TP and BR24G02NUX-10, the AT24C02-10PI-1.8 provides superior low-voltage write endurance consistency, full 3-bit address flexibility for multi-drop buses, and the lowest standby current (0.6 µA) at 1.8V - making it optimal for battery-constrained, multi-node sensor networks.

Availability

AT24C02-10PI-1.8 is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, and automotive body control modules requiring stable component supply across extended temperature and low-voltage operation.

Supply support for AT24C02-10PI-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 devices, and memory solutions, with a strong heritage in reliable nonvolatile memory products.

The AT24Cxx family was designed specifically for cost-sensitive, space-constrained embedded systems requiring robust, low-power serial EEPROM - especially in industrial, automotive, and consumer applications demanding long-term data integrity.

FAQ

What is the maximum I²C clock frequency supported by AT24C02-10PI-1.8 at 1.8V?

The AT24C02-10PI-1.8 supports a maximum I²C clock frequency of 100 kHz when operated at 1.8V. This is explicitly specified in the AC Characteristics table under "2.7-, 2.5-, 1.8-volt" conditions. At 5.0V, the device supports up to 400 kHz, but that rating does not apply to the AT24C02-10PI-1.8 variant, which is characterized and guaranteed for 100 kHz operation across its full 1.8V–5.5V supply range.

Does AT24C02-10PI-1.8 support partial page writes?

Yes, AT24C02-10PI-1.8 supports partial page writes. As confirmed in the Features section, "Partial Page Writes are Allowed", and the Memory Organization section states it is internally organized into 32 pages of 8 bytes each. A partial page write can begin at any byte offset within a page and continue up to the page boundary (7 additional bytes maximum), with automatic address incrementing - no alignment constraints are imposed.

What is the function of the A0, A1, and A2 pins on AT24C02-10PI-1.8?

On AT24C02-10PI-1.8, the A0, A1, and A2 pins are hard-wired device address inputs used to configure the lower three bits of the 7-bit I²C slave address (prefix 1010). This allows up to eight AT24C02 devices to share the same I²C bus. All three pins are active and must be externally pulled high or low - unlike larger variants (e.g., AT24C08), none are No Connect on the AT24C02-10PI-1.8.

How does the Write Protect (WP) pin operate on AT24C02-10PI-1.8?

The WP pin on AT24C02-10PI-1.8 is an active-high hardware lock. When WP is driven to VCC, the entire 2K memory array is write-protected - all write commands (byte or page) are ignored. When WP is connected to GND, normal read and write operations are fully enabled. This behavior is independent of software commands and remains effective during power-up, brown-out, or reset events.

What package type is used for AT24C02-10PI-1.8?

AT24C02-10PI-1.8 uses an 8-lead JEDEC-standard SOIC package (designated 8S1), with 0.150" body width and gull-wing leads. This is confirmed in the AT24C02 Ordering Information table, where "-10PI" suffix denotes Industrial temperature grade and "8S1" package - matching the mechanical drawing labeled "8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC)".