Microchip Technology AT24C64-10TI-2.7

Overview

AT24C64-10TI-2.7 from Microchip Technology (formerly Atmel) is a 64 Kbit (8192 × 8) serial EEPROM with I²C-compatible 2-wire interface, operating from 2.7V to 5.5V, featuring hardware write protection via WP pin and 32-byte page write capability. It delivers 1 million write cycles endurance and 100-year data retention, deployed in industrial control modules for nonvolatile parameter storage.

For engineers reviewing the AT24C64-10TI-2.7 datasheet, AT24C64-10TI-2.7 pinout, AT24C64-10TI-2.7 application, or AT24C64-10TI-2.7 equivalent, key selection criteria include VCC range compatibility (2.7–5.5V), TSSOP-8 package footprint, 400 kHz max clock at 5V, WP-driven quadrant-level write protection, and 10 ms self-timed write cycle timing.

Technical Context

The AT24C64-10TI-2.7 implements a standard I²C protocol with Schmitt-triggered, noise-filtered SDA/SCL inputs and supports cascaded bus configurations up to eight devices using A0–A2 address pins. Its internal architecture organizes memory as 256 pages of 32 bytes each, enabling partial-page writes without erasing adjacent data.

Write operations are controlled by the WP pin: grounded for full-write access, tied to VCC to inhibit writes to the upper 16K bits (2048 words), and left floating to default to GND via internal pull-down. The device enters low-power standby mode (<2 µA at 5.5V) after STOP condition and internal write completion.

Key Specifications

Pinout & Package

AT24C64-10TI-2.7 is housed in an 8-pin Thin Shrink Small Outline Package (TSSOP), 4.4 mm body width, JEDEC MO-153 compliant, with 0.65 mm lead pitch and exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M95640-DW and BR24G64FJ-WE2, the AT24C64-10TI-2.7 offers native I²C compatibility with hardware WP polarity aligned to industrial standards, fixed 400 kHz/100 kHz dual-rate timing, and proven qualification for extended temperature operation - making it optimal for legacy-compatible, cost-sensitive, and noise-immune embedded systems.

Availability

AT24C64-10TI-2.7 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering platforms, and medical device configuration storage requiring stable component supply, long-lifecycle assurance, and TSSOP-8 footprint compatibility.

Supply support for AT24C64-10TI-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 components, and nonvolatile memory solutions, with broad industrial and automotive qualifications.

The AT24C64-10TI-2.7 belongs to Microchip's legacy AT24Cxx serial EEPROM product line, designed specifically for low-power, space-constrained embedded systems requiring reliable, byte-addressable nonvolatile storage with minimal external components.

FAQ

What is the operating voltage range of the AT24C64-10TI-2.7?

The AT24C64-10TI-2.7 operates from 2.7V to 5.5V DC. This dual-range compatibility allows direct integration into both 3.3V and 5V systems without level-shifting circuitry. The "-2.7" suffix explicitly denotes the 2.7V minimum VCC rating, distinguishing it from the 1.8V variant (AT24C64-10TI-1.8). Performance parameters such as clock rate and standby current are specified across this full range.

Does the AT24C64-10TI-2.7 support page write operations, and what is the page size?

Yes, the AT24C64-10TI-2.7 supports 32-byte page write mode, allowing up to 32 bytes to be written in a single I²C transaction. This reduces bus overhead compared to byte-wise writes and improves effective write throughput. The internal memory is organized as 256 pages of 32 bytes each; attempting to write beyond a page boundary causes automatic rollover to the start of the same page.

How does the Write Protect (WP) pin function on the AT24C64-10TI-2.7?

On the AT24C64-10TI-2.7, the WP pin is active-high: when tied to VCC, it inhibits write operations to the upper 16K bits (2048 words) of memory; when grounded, full write access is enabled. If left unconnected, an internal pull-down defaults WP to logic low, permitting full writes. This hardware-level protection prevents accidental corruption of critical configuration data without software intervention.

What package type is used for the AT24C64-10TI-2.7, and is it RoHS compliant?

The AT24C64-10TI-2.7 uses an 8-pin Thin Shrink Small Outline Package (TSSOP), designated as 8A2 per Microchip's packaging documentation. It measures 3.0 mm × 4.4 mm with 0.65 mm lead pitch. The part is RoHS compliant and halogen-free, meeting JEDEC MO-153, Variation AA mechanical specifications and environmental standards for industrial applications.

Can multiple AT24C64-10TI-2.7 devices share the same I²C bus, and how is addressing managed?

Yes, up to eight AT24C64-10TI-2.7 devices can share a single I²C bus using hardwired A0, A1, and A2 pins to configure unique 3-bit device addresses (0x50–0x57). These pins may be tied to VCC, GND, or left floating (defaulting to low), enabling flexible multi-device topologies without additional address decoding logic. Each device responds only to its assigned address, ensuring isolated read/write access.