Analog Devices Inc./Maxim Integrated MAX9065EBS+TG45

Overview

The MAX9065EBS+TG45 from Maxim Integrated is an ultra-small, nanoPower window comparator IC designed for lithium-ion battery voltage monitoring in space-constrained portable electronics. It features 4.2V upper and 3.0V lower threshold voltages, 1μA max supply current, -0.3V to +5.5V input common-mode range, and operates from 1.0V to 5.5V supply over -40°C to +85°C - enabling precise battery health supervision in cell phones and medical wearables.

For engineers reviewing the MAX9065EBS+TG45 datasheet, MAX9065EBS+TG45 pinout, MAX9065EBS+TG45 application, or MAX9065EBS+TG45 equivalent, key selection criteria include its fixed 3.0V/4.2V trip points, 4-bump UCSP package footprint (1mm × 1mm), push-pull output drive, RF-immune architecture, and shutdown current <15nA at V_CC = 0V.

Technical Context

The MAX9065EBS+TG45 implements a dual-comparator window detection architecture with an internal 200mV reference and resistor-divider network that generates V_UPPER and V_LOWER thresholds. Its digital logic behaves as an AND gate: output goes high only when both comparators are simultaneously satisfied (3.0V < V_IN < 4.2V), otherwise low.

It integrates an n-channel FET disconnect switch that eliminates input leakage when powered down (V_CC = 0V), achieving ≤15nA input shutdown current. The device exhibits ±1% hysteresis, 25µs propagation delay (±100mV overdrive), and 40–53dB PSRR - ensuring robust operation under noisy supply conditions and fast transient response.

Key Specifications

Pinout & Package

The MAX9065EBS+TG45 is housed in a 4-bump UCSP (Ultra-Compact Silicon Package) with 1mm × 1mm footprint and 0.5mm bump pitch. Bumps are on the bottom side; top marking is "AGC". RoHS-compliant with protective die coating (G45 suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar window comparator applications.

Compared with TLV7032DRYR and MAX9064EBS+TG45, the MAX9065EBS+TG45 delivers smallest footprint, lowest guaranteed supply current (1μA max), and push-pull output eliminating external components - making it optimal for space- and power-critical Li-ion battery guardbanding.

Availability

MAX9065EBS+TG45 is available at Aetrix Electronics and suitable for cell phone battery protection, portable medical sensor supervision, and notebook secondary power management requiring stable component supply across long production lifecycles.

Supply support for MAX9065EBS+TG45 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

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and portable applications.

The MAX9065 product line delivers ultra-low-power, miniature window comparators optimized for lithium battery voltage supervision - targeting applications where board space, energy efficiency, and hardware-level safety are non-negotiable.

FAQ

What is the exact threshold accuracy of the MAX9065EBS+TG45 over temperature?

The MAX9065EBS+TG45 guarantees upper threshold voltage (UTV) of 4.20V ±0.10V and lower threshold voltage (LTV) of 3.00V ±0.08V across the full -40°C to +85°C operating range. At +25°C, UTV is 4.20V ±42mV and LTV is 3.00V ±60mV. These values are production-tested and specified in the Electrical Characteristics table of the official datasheet. The MAX9065EBS+TG45 maintains this accuracy without calibration or trimming.

Does the MAX9065EBS+TG45 require external passive components to function?

No, the MAX9065EBS+TG45 operates autonomously with only a 0.1μF V_CC bypass capacitor required per the datasheet recommendation. Its 3.0V and 4.2V thresholds are factory-trimmed and internally generated - eliminating external resistors, references, or dividers. Input impedance exceeds 5.8MΩ, allowing direct connection to battery terminals without loading. The MAX9065EBS+TG45 is a complete, self-contained window detector.

Can the MAX9065EBS+TG45 monitor batteries other than lithium-ion?

The MAX9065EBS+TG45 is specifically optimized for single-cell Li-ion/Li-Po batteries with nominal 3.7V and 4.2V full-charge voltage. Its fixed 3.0V/4.2V thresholds do not match NiMH (1.2V/cell), lead-acid (2.0V/cell), or LiFePO₄ (3.6V max) chemistries. While it can physically sense any voltage within -0.3V to +5.5V, correct functional behavior requires matching the battery's safe voltage window - so the MAX9065EBS+TG45 is not recommended for non-Li-ion chemistries.

How does the MAX9065EBS+TG45 behave when V_CC is disconnected?

When V_CC is pulled to 0V, the MAX9065EBS+TG45 enters shutdown mode: the internal resistor-divider is disabled via an n-channel FET, reducing input leakage current to ≤15nA. The output goes to high-impedance (not driven), and supply current drops to near-zero. This feature ensures no parasitic drain on the battery during storage or system off-state - a critical capability confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections for the MAX9065EBS+TG45.

Is the MAX9065EBS+TG45 pin-compatible with other variants in the MAX9065 family?

Yes, the MAX9065EBS+TG45 shares identical 4-bump UCSP pinout (A1=OUT, A2=IN, B1=V_CC, B2=GND) with MAX9065AEBS+ and MAX9065AEWS+TCNB. However, threshold voltages differ: MAX9065AEBS+ uses 0.6V/1.2V, while MAX9065EBS+TG45 uses 3.0V/4.2V. Swapping them without verifying threshold alignment will cause incorrect battery monitoring. The MAX9065EBS+TG45 is not pin-compatible with the 5-pin SOT23 variant (MAX9065EUK+).