Microchip Technology 24AA512SC-I/W17K

Overview

24AA512SC-I/W17K from Microchip Technology is a 512 Kbit (64 K × 8) I²C-compatible serial EEPROM with 1.8–5.5 V operation, 128-byte page write capability, 400 kHz maximum clock frequency, and industrial temperature grade (–40°C to +85°C). It features hardware write protection via the WP pin and supports up to eight devices on a single I²C bus using address pins A0–A2 - used in embedded systems for configuration storage, calibration data retention, and firmware parameter logging.

For engineers reviewing the 24AA512SC-I/W17K datasheet, 24AA512SC-I/W17K pinout, 24AA512SC-I/W17K application, or 24AA512SC-I/W17K equivalent, key selection criteria include its 128-byte page size for efficient bulk writes, guaranteed 1 million erase/write cycles, RoHS-compliant W17K 8-lead SOIC package, and compatibility with standard I²C protocol implementations across microcontroller platforms.

Technical Context

The 24AA512SC-I/W17K implements a standard two-wire I²C interface with fixed 7-bit slave address (1010xxx) and three hardware address inputs (A0–A2), enabling up to eight devices on one bus. It uses internal address auto-increment during sequential reads/writes and supports both random and sequential read modes.

Its memory array is organized as 65,536 × 8 bits, divided into 512 pages of 128 bytes each. Write operations are internally timed with automatic end-of-write detection, and the device asserts ACK after each byte received - ensuring robust communication under variable system timing conditions.

Key Specifications

Pinout & Package

24AA512SC-I/W17K is housed in an 8-lead SOIC (Small Outline Integrated Circuit) package, 150 mil width (W17K), RoHS-compliant, with gull-wing leads and standard JEDEC MS-012AC outline.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA512SC-I/W17K, 24LC512-I/P lacks 1.8 V support and uses larger PDIP packaging, while 24FC512-I/SN offers faster 1 MHz I²C but may require timing validation in noise-sensitive analog-rich systems.

Availability

24AA512SC-I/W17K is available at Aetrix Electronics and suitable for smart energy metering, industrial PLC configuration storage, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for 24AA512SC-I/W17K 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., headquartered in Chandler, Arizona, designs and manufactures microcontrollers, analog and interface semiconductors, and serial nonvolatile memory products with vertically integrated wafer fabrication and test facilities.

The 24AA512SC-I/W17K belongs to Microchip's I²C-compatible serial EEPROM product line, engineered for reliable, low-power, multi-voltage nonvolatile data storage in embedded control systems where robustness and long-term data integrity are essential.

FAQ

What is the maximum I²C clock frequency supported by the 24AA512SC-I/W17K?

The 24AA512SC-I/W17K supports a maximum I²C clock frequency of 400 kHz across its full 1.8–5.5 V operating range. This standard-mode speed ensures interoperability with legacy and modern microcontrollers while maintaining signal integrity on typical PCB traces without requiring active termination or slew-rate control.

Does the 24AA512SC-I/W17K require external pull-up resistors on SDA and SCL lines?

Yes, the 24AA512SC-I/W17K requires external pull-up resistors on both SDA and SCL lines because it uses open-drain outputs. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time; Microchip recommends 4.7 kΩ for most 400 kHz I²C implementations with ≤400 pF total bus capacitance.

How many 24AA512SC-I/W17K devices can be connected on a single I²C bus?

Up to eight 24AA512SC-I/W17K devices can be connected on a single I²C bus using the A0, A1, and A2 address pins to configure unique 3-bit hardware addresses. Each device occupies one of the eight possible 7-bit slave addresses in the 1010xxx binary range, enabling scalable multi-device memory architectures.

What is the write endurance specification for the 24AA512SC-I/W17K?

The 24AA512SC-I/W17K is specified for 1,000,000 write/erase cycles per memory location. This endurance rating is guaranteed across the full industrial temperature range (–40°C to +85°C) and 1.8–5.5 V supply, making it suitable for applications involving frequent parameter updates such as sensor calibration or usage logging.

Is the 24AA512SC-I/W17K RoHS-compliant and lead-free?

Yes, the 24AA512SC-I/W17K is RoHS-compliant and manufactured with lead-free (Pb-free) plating per Microchip's packaging standards. The W17K package designation confirms compliance with EU RoHS Directive 2011/65/EU and associated exemptions, and the device carries appropriate marking per JEDEC J-STD-609.