Microchip Technology AT24C16C-MAHM-T

Overview

AT24C16C-MAHM-T from Microchip Technology is a 16-Kbit I²C-compatible serial EEPROM organized as 2,048 × 8 bits, operating from 1.7V to 5.5V across -40°C to +85°C industrial temperature range. It supports 100 kHz standard mode, 400 kHz fast mode, and 1 MHz fast mode plus (FM+) I²C communication, features hardware write protection via WP pin, and delivers ultra-low standby current (6 μA max) for battery-backed data logging in embedded controllers.

For engineers reviewing the AT24C16C-MAHM-T datasheet, AT24C16C-MAHM-T pinout, AT24C16C-MAHM-T application, or AT24C16C-MAHM-T equivalent, key selection considerations include VCC voltage range compatibility, FM+ timing support at ≥2.5V, page write capability (16-byte boundary), WP pin logic behavior, and 8-pad UDFN package footprint constraints.

Technical Context

The AT24C16C-MAHM-T implements a true I²C slave interface with open-drain SDA/SCL pins, integrated Schmitt triggers and noise filters on both inputs, and a dedicated Write-Protect (WP) pin that disables all writes when pulled high. Its memory array is segmented into 128 pages of 16 bytes each, enabling partial-page writes within the same physical row (A10–A4 unchanged).

Internally, it includes a Power-on Reset (POR) circuit with VPOR = 1.5V threshold, tPUP = 100 µs minimum delay after stable VCC before command acceptance, and self-timed write cycles completing within 5 ms maximum. The device uses no-connect (NC) pins in its 8-pad UDFN package to isolate unused die bond pads without functional impact.

Key Specifications

Pinout & Package

AT24C16C-MAHM-T is packaged in an 8-pad UDFN (Ultra Thin Dual Flat No-lead) with 2.0 mm × 1.6 mm body, 0.5 mm pitch, and exposed pad (recommended to connect to GND for thermal and EMI performance).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C16D-MAHM-T, the AT24C16C-MAHM-T trades 1.8V FM+ support for cost efficiency in 2.5V+ systems; versus M24C16-RMN6TP, it provides superior speed, lower power, and consistent WP polarity - making it optimal for new UDFN-based designs needing 1 MHz I²C.

Availability

AT24C16C-MAHM-T is available at Aetrix Electronics and suitable for industrial sensor calibration storage, smart meter firmware parameter backup, and IoT edge node configuration requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for AT24C16C-MAHM-T 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 ISO 9001-certified manufacturing and design operations.

The AT24C16C-MAHM-T belongs to Microchip's AT24Cxx family of I²C serial EEPROMs, engineered for reliable, low-voltage, low-power nonvolatile data storage in industrial, automotive, and consumer embedded systems.

FAQ

What is the maximum I²C clock frequency supported by the AT24C16C-MAHM-T?

The AT24C16C-MAHM-T supports 100 kHz standard mode across 1.7–5.5V, 400 kHz fast mode across 1.7–5.5V, and 1 MHz fast mode plus (FM+) only at VCC ≥2.5V. Operation above 400 kHz is not guaranteed below 2.5V. This tiered speed support allows designers to maximize throughput where supply voltage permits while maintaining compatibility with legacy 100 kHz systems.

How does the Write-Protect (WP) pin function on the AT24C16C-MAHM-T?

On the AT24C16C-MAHM-T, the WP pin is active-high: connecting it to VCC disables all write operations to the entire memory array, while grounding it enables normal writes. If left floating, an internal weak pull-down forces WP low (write-enabled), but Microchip recommends tying it to a defined logic level to prevent noise-induced protection failures. This hardware lock operates independently of software commands.

What package type is used for the AT24C16C-MAHM-T?

The AT24C16C-MAHM-T uses an 8-pad UDFN (Ultra Thin Dual Flat No-lead) package measuring 2.0 mm × 1.6 mm with 0.5 mm pitch and an exposed thermal pad. This compact, lead-free, RoHS-compliant package is optimized for high-density PCB layouts and automated assembly, with the exposed pad recommended to be soldered to a GND plane for thermal dissipation and EMI reduction.

Does the AT24C16C-MAHM-T support page write operations, and what is the page size?

Yes, the AT24C16C-MAHM-T supports page write operations with a fixed 16-byte page size. Writes crossing a 16-byte boundary automatically wrap to the start of the same page. This allows efficient bulk programming of contiguous data - for example, writing a full 16-byte calibration table in one I²C transaction instead of 16 separate byte writes - reducing bus overhead and total write time.

What is the endurance and data retention specification for the AT24C16C-MAHM-T?

The AT24C16C-MAHM-T guarantees 1,000,000 write cycles per memory location and 100 years of data retention at 55°C. These specifications are validated through qualification testing and characterization, not just typical values. The 100-year retention applies under worst-case operating temperature (55°C), ensuring robustness for applications like utility meters or infrastructure sensors deployed in thermally demanding environments.