Microchip Technology AT24C64N-10SI-2.7

Overview

AT24C64N-10SI-2.7 from Microchip Technology (formerly Atmel) is a 64 Kbit (8192 × 8) I²C-compatible serial EEPROM with 2.7V to 5.5V supply operation, 32-byte page write capability, hardware write protection via WP pin, and industrial temperature range (–40°C to +85°C). It uses an 8-pin JEDEC SOIC package and supports 100 kHz clock rate at 2.7V for embedded system configuration storage.

For engineers reviewing the AT24C64N-10SI-2.7 datasheet, AT24C64N-10SI-2.7 pinout, AT24C64N-10SI-2.7 application, or AT24C64N-10SI-2.7 equivalent, key selection considerations include VCC voltage compatibility (2.7–5.5V), page write timing (≤10 ms), standby current (0.5 µA at 2.7V), and hardware write protection implementation using the WP pin.

Technical Context

The AT24C64N-10SI-2.7 implements a standard two-wire I²C interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. It uses a 13-bit internal address counter for random access across its 8192-word memory array, with automatic page boundary handling during multi-byte writes.

Device addressing relies on three hardware-configurable pins (A2, A1, A0), enabling up to eight devices on a shared bus. The WP pin provides hardware-level protection of the upper 16K bits (2048 bytes), and acknowledge polling is supported for write cycle completion detection without fixed delay timing.

Key Specifications

Pinout & Package

AT24C64N-10SI-2.7 is housed in an 8-pin JEDEC SOIC (8S1) package: 0.150" wide, gull-wing leads, RoHS-compliant plastic body.

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 AT24C64N-10SI-2.7 delivers guaranteed 100 kHz I²C timing at 2.7V, explicit hardware WP pin behavior, and industrial temperature qualification - making it optimal for cost-sensitive, low-voltage embedded systems where deterministic write protection and voltage margin are critical.

Availability

AT24C64N-10SI-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance configuration, medical device settings backup, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance.

Supply support for AT24C64N-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 AT24C64N-10SI-2.7 belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-power, I²C-based nonvolatile data storage in space-constrained industrial and consumer electronics.

FAQ

What is the maximum clock frequency supported by AT24C64N-10SI-2.7 at 2.7V?

The AT24C64N-10SI-2.7 supports a maximum I²C clock frequency of 100 kHz when operated at 2.7V. This is explicitly characterized and guaranteed per the datasheet AC specifications table under "2.7-, 2.5-volt" conditions. At 5.0V, the device supports up to 400 kHz, but that rating does not apply to the 2.7V operation range of the AT24C64N-10SI-2.7.

Does AT24C64N-10SI-2.7 support partial page writes?

Yes, the AT24C64N-10SI-2.7 supports partial page writes within its 32-byte pages. After initiating a page write sequence, the internal address counter increments automatically for each byte written, wrapping within the same page boundary. Writing fewer than 32 bytes before issuing a STOP condition is fully compliant and commonly used for updating individual configuration fields without disturbing adjacent data in the AT24C64N-10SI-2.7.

How does the WP pin function on AT24C64N-10SI-2.7?

On the AT24C64N-10SI-2.7, the WP (Write Protect) pin is active-high: when tied to VCC, it inhibits write operations to the upper quadrant (16K bits, addresses 0x2000–0x3FFF); when grounded or left floating (internally pulled down), full memory access is enabled. This hardware-level protection is immediate and immune to software faults, making it essential for safeguarding critical firmware or calibration data stored in the AT24C64N-10SI-2.7.

What is the endurance rating of AT24C64N-10SI-2.7?

The AT24C64N-10SI-2.7 is rated for 1 million write cycles per memory location, as confirmed in the datasheet Endurance specification (5.0V, 25°C, Page Mode). This applies uniformly across all 8192 words and is validated under standard test conditions - ensuring robustness for applications involving daily recalibration, event logging, or parameter tuning over extended service life of the AT24C64N-10SI-2.7.

Is AT24C64N-10SI-2.7 qualified for industrial temperature operation?

Yes, the AT24C64N-10SI-2.7 is specified for industrial temperature range operation from –40°C to +85°C, as indicated by the "I" suffix in the ordering code and confirmed in the Ordering Information table. This qualification covers all electrical characteristics, timing parameters, and reliability metrics - making the AT24C64N-10SI-2.7 suitable for deployment in harsh environments such as factory automation, outdoor equipment, and transportation systems.