Analog Devices Inc./Maxim Integrated MAX9065EBS+T

Overview

MAX9065EBS+T from Maxim Integrated is an ultra-small, nanoPower window comparator IC designed for lithium-ion battery voltage monitoring in space-constrained portable systems. 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. It delivers precise window detection in cell phones and portable medical devices.

For engineers reviewing the MAX9065EBS+T datasheet, MAX9065EBS+T pinout, MAX9065EBS+T application, or MAX9065EBS+T equivalent, this page provides verified functional specifications, UCSP package layout, real-world use cases for battery protection, and validated alternative parts with documented threshold and packaging differences.

Technical Context

The MAX9065EBS+T integrates two precision comparators, a resistor-divider network with disconnect FET, and a 200mV internal reference to implement fixed-window detection. Its digital logic behaves as an AND gate: output goes high only when both comparators indicate input is between thresholds.

When VCC = 0V, the bottom n-channel FET shuts off, eliminating input leakage path - enabling true zero-current shutdown. Hysteresis is fixed at ±1% of threshold (e.g., ±42mV around 4.2V), ensuring noise immunity without external components.

Key Specifications

Pinout & Package

MAX9065EBS+T uses a 4-bump UCSP (Ultra Compact Silicon Package) with 1mm × 1mm footprint and 0.5mm bump pitch. Bumps are on the bottom surface; top marking is "AGC". Package is RoHS-compliant and includes protective die coating (G45).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX9065EBS+T, MAX9065EUK+ offers easier handling but larger footprint and looser threshold accuracy, while TLV7032DRYR provides flexibility at the cost of added components and calibration complexity - making MAX9065EBS+T optimal for production Li-ion battery monitoring where size and precision are critical.

Availability

MAX9065EBS+T is available at Aetrix Electronics and suitable for portable medical devices, wearable electronics, and IoT edge nodes requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.

Supply support for MAX9065EBS+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

Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for power, sensing, and interface applications in industrial, automotive, and consumer markets.

The MAX9065 series was developed specifically for ultra-low-power, space-constrained battery supervision - delivering factory-trimmed window thresholds in sub-1mm² packages for next-generation portable electronics.

FAQ

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

The MAX9065EBS+T guarantees upper threshold voltage (UTV) between 4.10V and 4.30V, and lower threshold voltage (LTV) between 2.92V and 3.08V, across the full -40°C to +85°C operating range. These limits are specified in the Electrical Characteristics table and confirmed by production testing - not typical or room-temperature-only values. The MAX9065EBS+T achieves this using laser-trimmed resistor networks inside its 4-bump UCSP package.

Does MAX9065EBS+T require external components to operate?

No, MAX9065EBS+T operates autonomously with only a 0.1µF VCC bypass capacitor required. It integrates both comparators, a precision resistor divider, a 200mV reference, and digital logic - eliminating external resistors, references, or hysteresis networks. The fixed 3.0V/4.2V thresholds are factory-trimmed, so no calibration or adjustment is needed for standard Li-ion battery monitoring.

Can MAX9065EBS+T monitor batteries below 1.0V?

No - MAX9065EBS+T requires minimum 1.0V supply (VCC) to operate, but its input (IN) accepts voltages as low as -0.3V. While the device can sense inputs down to -0.3V, it cannot function when VCC < 1.0V. For sub-1V battery monitoring, a different supervisor or charge-pump-assisted solution would be required. The MAX9065EBS+T is intended for active-system supervision, not deep-storage detection.

How does MAX9065EBS+T achieve zero input current during shutdown?

When VCC = 0V, an internal n-channel FET at the bottom of the resistor-divider network turns off, disconnecting the entire threshold generation path from GND. This reduces input terminal leakage to just 1nA (max), preventing battery drain during system sleep or storage. This behavior is explicitly characterized in the Electrical Characteristics table under "Input Shutdown Current" (IIN_SHDN).

Is MAX9065EBS+T pin-compatible with other MAX9065 variants?

No - MAX9065EBS+T (4-bump UCSP) is not pin-compatible with MAX9065EUK+ (5-pin SOT23) or MAX9065AEWS+TCNB (4-bump WLP). Each variant has distinct pin count, layout, and bump/pad configuration. The UCSP version uses A1/A2/B1/B2 bump locations, while SOT23 uses pins 1–5 in linear order. PCB layout must be specific to the chosen package; no shared footprint exists across MAX9065 variants.