Analog Devices Inc./Maxim Integrated MAX9061EUK+T

Overview

The MAX9061EUK+T from Analog Devices is a nanoPower single comparator with inverting input, open-drain output, and external reference input (0.9V–5.5V), consuming only 100nA max supply current. It operates from -40°C to +85°C, supports input voltages from -0.3V to +5.5V independent of supply, and is housed in a 5-pin SOT23 package - ideal for battery-powered portable electronics requiring ultra-low quiescent current and minimal board space.

For engineers reviewing the MAX9061EUK+T datasheet, MAX9061EUK+T pinout, MAX9061EUK+T application, or MAX9061EUK+T equivalent, key selection considerations include its inverting-input topology, 100nA max ICC, 15µs propagation delay, -0.3V to +5.5V input voltage range, and compatibility with microcontroller I/O ports via external pullup.

Technical Context

The MAX9061EUK+T implements an inverting-input comparator architecture with high-impedance inputs that remain functional even when REF = 0V, enabling robust power-gating schemes in battery-constrained systems. Its input stage avoids ESD diode clamping to REF, allowing VIN to exceed REF by several volts within absolute maximum limits.

It features internal hysteresis (±12mV) for noise immunity and requires an external pullup resistor on the open-drain output. The device draws supply current solely from the REF pin (not a separate VCC), supporting operation down to REF = 0.9V while maintaining full input range and stable offset performance.

Key Specifications

Pinout & Package

MAX9061EUK+T is supplied in a RoHS-compliant 5-pin SOT23 package (outline 21-0057), 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and standard pitch (0.95mm). Pin 1 is marked with a dot or bevelled edge.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3691IDBVR and MAX9063EUK+, the MAX9061EUK+T uniquely supports externally programmable thresholds via REF while maintaining nanoPower operation and inverting-input functionality - essential for adaptive, battery-optimized sensing in portable systems.

Availability

MAX9061EUK+T is available at Aetrix Electronics and suitable for portable medical devices, notebook computers, electronic toys, and battery-powered sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX9061EUK+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

Analog Devices (acquired Maxim Integrated in 2021) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and consumer markets.

The MAX9060–MAX9064 family was designed specifically for ultra-low-power, space-constrained portable electronics - delivering nanoPower operation, miniature packaging (UCSP/SOT23), and flexible reference architectures for next-generation battery-operated devices.

FAQ

What is the function of the N/C pin on the MAX9061EUK+T?

The pin 5 (N/C) on the MAX9061EUK+T is a no-connect terminal - it is not bonded internally and serves no electrical function. It must remain unconnected in the PCB layout per the datasheet. This pin exists for mechanical symmetry and package compatibility across the MAX9060–MAX9064 family; routing or grounding it may cause unintended stress or reliability issues.

Can the MAX9061EUK+T operate with a 0.9V reference voltage?

Yes, the MAX9061EUK+T is fully specified to operate with REF = 0.9V, drawing only 100nA max supply current and maintaining its -0.3V to +5.5V input voltage range. At this minimum REF, VOL remains ≤ 0.20V at 25µA sink current, enabling direct interface with 1.0V–1.2V logic families when paired with appropriate pullup voltage and resistance.

Does the MAX9061EUK+T require a bypass capacitor on the REF pin?

Yes, a 0.1µF ceramic capacitor must be placed between REF and GND, as close as possible to the MAX9061EUK+T package. This bypass stabilizes the internal bias network during output transitions, prevents supply-induced glitches, and ensures consistent 15µs propagation delay and ±12mV hysteresis performance across temperature and load conditions.

How does the inverting input configuration of the MAX9061EUK+T affect its use in battery monitoring?

In battery monitoring, the inverting input of the MAX9061EUK+T means the output goes low when the monitored voltage (e.g., battery anode) falls *below* the REF threshold - providing intuitive active-low alert signaling. This matches common microcontroller interrupt or enable-pin polarity, eliminating need for external inversion and reducing component count in compact portable designs.

Is the MAX9061EUK+T pin-compatible with other devices in the MAX9060–MAX9064 family?

Yes, the MAX9061EUK+T shares identical 5-pin SOT23 pinout with MAX9060EUK+, MAX9062EUK+, MAX9063EUK+, and MAX9064EUK+. However, functional differences exist: MAX9060/MAX9061 use REF-powered open-drain outputs; MAX9062/MAX9063 use internal 0.2V reference; MAX9064 adds push-pull output. Swapping requires verifying REF/VCC sourcing and output loading requirements.