MAX8672ETD+T

MAX8672ETD+T is a battery-monitor/fuel-gauge IC from Maxim Integrated. It is designed to supervise Li‑ion battery packs by measuring voltage, current (via a sense resistor), and temperature, and it can track charge with a coulomb counter. It reports the data to a host microcontroller over I2C and includes built‑in ADCs, alert outputs, and low‑power operating modes for long battery life. The ETD+T suffix denotes the specific package and packaging (e.g., tape and reel) used by Maxim; check the datasheet for the exact pinout, electrical characteristics, timing, and layout recommendations. Typical applications include wearable devices, mobile electronics, and other portable products that require accurate state‑of‑charge monitoring and safe battery management.

Equivalent devices (3–15 cell Li‑ion battery monitor/gauge) include:
- TI BQ76920 / BQ76930 / BQ76940 (3–5S / 6–10S / 9–15S; SMBus/I2C)
- Renesas ISL94202 / ISL94203
- Analog Devices LTC680x / LTC681x cell-monitor families (external gauge)
- Maxim MAX17043 / MAX17044 gas gauges
Note: pinouts, interfaces, and exact cell-count support differ; verify specs for drop-in suitability.

Key features of MAX8672ETD+T (battery monitor/gas gauge in ETD package):
- I2C-compatible control and data interface for easy MCU integration
- Measures battery voltage, current (coulomb counting option), and temperature
- Optional state-of-charge estimation with coulomb counting
- Internal ADC with programmable sampling rate and averaging
- Wide input range suitable for Li‑ion packs; supports single- or multi-cell configurations
- Ultra-low quiescent current with multiple power modes for long battery life
- Programmable alerts/interrupts for undervoltage/overvoltage, overcurrent, and SOC thresholds
- Fault/status reporting with watchdog and clear fault flags
- Small 3×3 mm ETD package; RoHS‑compliant; standard industrial temperature range (variant-dependent)
- +T suffix indicates tape-and-reel packaging for automated assembly
Note: Exact electrical characteristics (ranges, accuracies, and supported configurations) vary by revision; refer to the official datasheet for precise specs.

- Pin count: 28 pins (package variant ETD+T is a 28-pin device)
- Function: Analog front-end (AFE) with integrated ADC and I2C interface for multi-sensor measurements (e.g., voltage/current/temperature); provides multiple analog inputs and host MCU communication.

Manufacturer: Maxim Integrated (now part of Analog Devices).
What kind of company: An American multinational semiconductor company that designs and manufactures analog and mixed-signal integrated circuits.

MAX8672ETD+T is used for precision analog sensing in battery and power-management applications. Common areas include:
- Battery-management systems (BMS) for Li-ion/Li-poly packs
- Portable electronics (notebooks, tablets, handheld devices) for voltage/current/temperature monitoring
- Power tools and cordless equipment
- Energy meters, power supplies, data-logging instruments needing accurate sensing
- Automotive/e-mobility battery monitoring and thermal protection
- Industrial equipment and renewable-energy systems (inverters, UPS) requiring voltage/current/temperature measurement

The MAX8672ETD+T uses Maxim’s ETD package — a leadless, thermally enhanced package with an exposed pad. The “+T” suffix indicates Tape & Reel packaging.