Microchip Technology AT24C64W-10SC-1.8

Overview

AT24C64W-10SC-1.8 from Microchip Technology (formerly Atmel) is a 64 Kbit (8192 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage operation down to 1.8 V, featuring 32-byte page write capability, hardware write protection via WP pin, and 1 million write cycles endurance. It serves as nonvolatile configuration storage in battery-powered IoT sensors and portable medical devices requiring reliable data retention over 100 years.

For engineers reviewing the AT24C64W-10SC-1.8 datasheet, AT24C64W-10SC-1.8 pinout, AT24C64W-10SC-1.8 application, or AT24C64W-10SC-1.8 equivalent, key selection criteria include 1.8 V minimum supply compatibility, 100 kHz I²C speed at 1.8 V, WP pin behavior under VCC tie-high, standby current ≤0.1 µA at 1.8 V, and TSSOP-8 package footprint constraints.

Technical Context

The AT24C64W-10SC-1.8 implements a standard two-wire I²C interface with open-drain SDA/SCL pins, Schmitt-trigger inputs for noise immunity, and internal address latching for cascaded bus configurations supporting up to eight devices. Its memory is organized into 256 pages of 32 bytes each, enabling partial-page writes without erasing adjacent data.

Device addressing uses three hardware-configurable pins (A0–A2) to set the lower bits of the 7-bit slave address, while the WP pin provides hardware-level protection for the upper quadrant (16 Kbits) when pulled high. Internal voltage detection prevents write corruption during brown-out conditions.

Key Specifications

Pinout & Package

AT24C64W-10SC-1.8 is housed in an 8-pin TSSOP package per JEDEC MO-153, with 0.65 mm pitch and exposed pad not present. Pin 1 is marked by a beveled corner or dot; the package is lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M24C64-WMN6TP and BR24G64FJ-WE2, the AT24C64W-10SC-1.8 offers the lowest 1.8 V standby current (0.1 µA) and deterministic hardware WP behavior-critical for safety-critical or battery-limited applications where software overhead or leakage sensitivity cannot be compromised.

Availability

AT24C64W-10SC-1.8 is available at Aetrix Electronics and suitable for smart metering, wearable health monitors, industrial PLC I/O modules, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AT24C64W-10SC-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 memory solutions, with a focus on reliability, longevity, and embedded system integration.

The AT24C64W-10SC-1.8 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for low-voltage, low-power nonvolatile data storage in space-constrained and energy-sensitive applications across industrial, medical, and automotive markets.

FAQ

What is the minimum operating voltage for the AT24C64W-10SC-1.8?

The AT24C64W-10SC-1.8 operates down to 1.8 V DC, with full functionality-including 100 kHz I²C communication, 32-byte page writes, and hardware write protection-guaranteed across the 1.8 V to 5.5 V supply range. This makes the AT24C64W-10SC-1.8 suitable for direct integration with 1.8 V logic families without level-shifting circuitry.

How does the WP pin function on the AT24C64W-10SC-1.8?

On the AT24C64W-10SC-1.8, the WP (Write Protect) pin disables write access to the upper 16 Kbits (quadrant) of memory when pulled high to VCC. When tied low or left floating (internally pulled down), full read/write access is enabled. This hardware-based protection prevents accidental overwrites of critical calibration or security data during firmware updates or power transients.

What package type is used for the AT24C64W-10SC-1.8?

The AT24C64W-10SC-1.8 is supplied in an 8-pin TSSOP (Thin Shrink Small Outline Package) per JEDEC MO-153, measuring 3.0 mm × 4.4 mm with 0.65 mm lead pitch. It is lead-free, RoHS-compliant, and compatible with standard surface-mount reflow processes.

Can multiple AT24C64W-10SC-1.8 devices share the same I²C bus?

Yes - the AT24C64W-10SC-1.8 supports cascaded operation using its three hardware address pins (A0, A1, A2). Each pin can be hardwired high/low or left floating (defaulting to low), allowing up to eight AT24C64W-10SC-1.8 devices to coexist on a single I²C bus with unique 7-bit slave addresses.

What is the write endurance and data retention specification for the AT24C64W-10SC-1.8?

The AT24C64W-10SC-1.8 is rated for 1 million write cycles per memory location and guarantees 100 years of data retention at 25°C. These specifications are validated per JEDEC standards and apply across the full operating temperature range (-40°C to +85°C), ensuring long-term reliability in mission-critical embedded systems.