Microchip Technology AT24C64BN-10SU-2.7

Overview

AT24C64BN-10SU-2.7 from Microchip Technology is a 64-Kbit I²C-compatible serial EEPROM organized as 8,192 × 8 bits, operating from 2.7V to 5.5V, featuring 400 kHz Fast-mode I²C interface, hardware write-protection for the upper 16 Kb quadrant, and industrial temperature range (–40°C to +85°C). It serves as nonvolatile configuration storage in microcontroller-based systems requiring robust data retention and low-power operation.

For engineers reviewing the AT24C64BN-10SU-2.7 datasheet, AT24C64BN-10SU-2.7 pinout, AT24C64BN-10SU-2.7 application, or AT24C64BN-10SU-2.7 equivalent, key selection considerations include VCC voltage grade (2.7V–5.5V), WP pin functionality for quadrant-level hardware protection, 32-byte page write capability with ≤5 ms self-timed write cycle, and SOIC-8 package compatibility with standard I²C bus timing constraints.

Technical Context

The AT24C64BN-10SU-2.7 implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA and SCL inputs, supporting Standard-mode (100 kHz) and Fast-mode (400 kHz) operation across its full 2.7V–5.5V supply range. Its internal architecture includes an 8,192-word × 8-bit EEPROM array segmented into 256 pages of 32 bytes each.

Write protection is implemented via the dedicated WP pin: when pulled high to VCC, it inhibits writes to memory addresses 0x1800–0x1FFF (upper 16 Kb quadrant); when grounded, full-array write access is enabled. Device addressing uses hardwired A0–A2 pins to support up to eight devices on a single I²C bus, with address decoding based on the fixed '1010' device type identifier and configurable slave address bits.

Key Specifications

Pinout & Package

AT24C64BN-10SU-2.7 is housed in an 8-lead SOIC package (suffix "SU"), with gull-wing leads, 1.27 mm pitch, and JEDEC MS-012AC footprint. Pin 1 is marked by a beveled corner or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C64D-SSHM-T and M24C64-WMN6TP, AT24C64BN-10SU-2.7 delivers superior industrial temperature qualification (–40°C to +85°C), deterministic 16-Kb hardware write protection via WP, and proven integration in automotive and medical designs-making it the optimal choice where reliability, security, and environmental robustness are mandatory.

Availability

AT24C64BN-10SU-2.7 is available at Aetrix Electronics and suitable for industrial PLC configuration storage, medical device calibration data retention, and automotive body control module parameter backup requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for AT24C64BN-10SU-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 leading provider of microcontrollers, analog, FPGA, and memory solutions, serving industrial, automotive, communications, and consumer markets with vertically integrated silicon and development tools.

The AT24C64B family was designed specifically for reliable, low-power nonvolatile data storage in resource-constrained embedded systems-emphasizing I²C interoperability, hardware write security, and extended temperature resilience.

FAQ

What is the maximum I²C clock frequency supported by AT24C64BN-10SU-2.7?

The AT24C64BN-10SU-2.7 supports I²C Fast mode up to 400 kHz across its full 2.7V–5.5V supply range. This allows high-speed configuration reads and writes without compromising timing margins, provided external pull-up resistors are sized per Microchip's recommendations (e.g., ≤1.3 kΩ for 5V operation). The device also supports Standard mode at 100 kHz for legacy system compatibility.

How does the WP pin function on AT24C64BN-10SU-2.7?

On AT24C64BN-10SU-2.7, the WP pin provides hardware-level write protection for the upper 16 Kb quadrant (addresses 0x1800–0x1FFF). When WP is tied to VCC, writes to that region are blocked; when grounded, full-array writes are permitted. Internally pulled down if floating, but Microchip recommends explicit biasing to avoid noise-induced misoperation-critical for safeguarding boot code or calibration data.

What is the write endurance and data retention specification for AT24C64BN-10SU-2.7?

AT24C64BN-10SU-2.7 is rated for 1,000,000 write cycles and 100 years of data retention at 55°C. These values are validated through accelerated testing and qualification per AEC-Q100 stress standards. Real-world endurance may exceed 1M cycles in typical usage due to wear-leveling in host firmware, and retention exceeds 100 years at lower ambient temperatures.

Is AT24C64BN-10SU-2.7 compatible with 3.3V microcontrollers?

Yes, AT24C64BN-10SU-2.7 operates natively from 2.7V to 5.5V, making it fully compatible with 3.3V logic systems. Its I²C interface meets standard-mode and fast-mode voltage thresholds (VIH ≥ 0.7×VCC, VIL ≤ 0.3×VCC), and SDA/SCL inputs include Schmitt triggers for noise immunity-eliminating the need for level shifters when interfacing with 3.3V MCUs like STM32 or ESP32.

What package type does AT24C64BN-10SU-2.7 use, and what are its key mechanical features?

AT24C64BN-10SU-2.7 uses an 8-lead SOIC package (JEDEC MS-012AC), designated by the "SU" suffix. It features gull-wing leads, 1.27 mm lead pitch, 3.9 mm body width, and 4.9 mm length. The package is RoHS-compliant, halide-free, and qualified for reflow soldering per J-STD-020, supporting automated PCB assembly without special handling.