Microchip Technology AT24C1024W-10SI-2.7

Overview

AT24C1024W-10SI-2.7 from Microchip Technology (formerly Atmel) is a 1 Mbit (131,072 × 8) two-wire serial EEPROM IC designed for nonvolatile data storage in low-voltage embedded systems. It operates from 2.7V to 5.5V, supports up to 400 kHz I²C clock at 2.7V, features hardware write protection via the WP pin, and delivers 100,000 write cycles per page with 40-year data retention.

For engineers reviewing the AT24C1024W-10SI-2.7 datasheet, AT24C1024W-10SI-2.7 pinout, AT24C1024W-10SI-2.7 application, or AT24C1024W-10SI-2.7 equivalent, key selection criteria include its 8-lead EIAJ SOIC package, 256-byte page write capability, Schmitt-triggered noise-immune inputs, and dual-device bus cascading support using the A1 address pin.

Technical Context

The AT24C1024W-10SI-2.7 implements a standard I²C-compatible two-wire interface with open-drain SDA and edge-triggered SCL, supporting both byte and 256-byte page writes. Its internal 17-bit addressing scheme uses the P0 bit from the device address byte plus two full address bytes to access the full 131,072-word memory space.

It integrates Schmitt-trigger inputs and input filtering for robust operation in electrically noisy environments, and employs an internally timed 10 ms write cycle (tWR) with acknowledge polling support. The WP pin enables hardware-level write protection across the entire memory array when tied to VCC.

Key Specifications

Pinout & Package

AT24C1024W-10SI-2.7 is packaged in an 8-lead EIAJ SOIC (package code 8S2), 5.13 mm × 5.13 mm body, 1.27 mm lead pitch, gull-wing surface-mount format.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M24M01-DRMN3TP/K and CAT24M01HU5I-GT3, the AT24C1024W-10SI-2.7 offers unique dual-device bus addressing via A1 and guaranteed 400 kHz operation down to 2.7V - making it optimal for cost-sensitive industrial controllers where bus scalability and low-voltage reliability are primary constraints.

Availability

AT24C1024W-10SI-2.7 is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and smart energy metering requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for AT24C1024W-10SI-2.7 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 focus on embedded control and connectivity.

The AT24C1024 series belongs to Microchip's legacy serial EEPROM product line, engineered for robust, low-power, I²C-based nonvolatile storage in industrial, medical, and communications equipment.

FAQ

What is the maximum I²C clock frequency supported by AT24C1024W-10SI-2.7 at 2.7V?

The AT24C1024W-10SI-2.7 supports a maximum I²C clock frequency of 400 kHz when operated at VCC = 2.7V. This is specified in the AC Characteristics table under fSCL, with timing parameters (tLOW, tHIGH, tSU.STA, etc.) fully characterized for this condition. Operation above 400 kHz at 2.7V violates the device's timing specifications and may result in communication failures or data corruption.

Does AT24C1024W-10SI-2.7 support partial page writes?

Yes, AT24C1024W-10SI-2.7 supports partial page writes within its 256-byte page boundary. The device accepts any number of bytes (1–256) in a single page write sequence, automatically incrementing the lower 8 bits of the address while holding the upper 9 bits constant. If more than 256 bytes are sent, the address rolls over to the start of the same page, overwriting earlier data - a behavior explicitly documented in the "Page Write" section.

How does the WP pin function on AT24C1024W-10SI-2.7?

The WP pin on AT24C1024W-10SI-2.7 provides hardware-level write protection: when tied to VCC, all write operations (byte, page, and erase) are inhibited; when tied to GND or left floating (internally pulled down), writes are enabled. This dual-mode behavior allows both permanent lockout (via hardwired VCC) and dynamic software-controlled protection (by toggling WP during operation).

What package type does AT24C1024W-10SI-2.7 use, and what are its key mechanical dimensions?

AT24C1024W-10SI-2.7 uses the 8-lead EIAJ SOIC package (code 8S2), measuring 5.13 mm × 5.13 mm body size with 1.27 mm lead pitch. Its height is 2.03 mm max, and it conforms to EIAJ ED-7320 standards. The package features gull-wing leads suitable for reflow soldering and is RoHS-compliant per manufacturer documentation.

Can multiple AT24C1024W-10SI-2.7 devices share the same I²C bus?

Yes, up to two AT24C1024W-10SI-2.7 devices can share a single I²C bus using the A1 address pin. When A1 is hardwired to VCC or GND, it sets the LSB of the 7-bit device address (1010A10), enabling distinct addressing. With A1 floating (default low), both devices respond to the same address - so intentional hardwiring is required for independent operation.