Analog Devices Inc./Maxim Integrated MAX9117EXK-T

Overview

MAX9117EXK-T from Analog Devices is a nanopower, single-channel comparator with integrated 1.252V ±1.75% reference, Beyond-the-Rails™ input range (VEE −0.2V to VCC +0.2V), 600nA supply current at 1.6V, and push-pull rail-to-rail output capable of ±5mA drive. It operates from +1.6V to +5.5V and is designed for ultra-low-power 2-cell battery monitoring.

For engineers reviewing the MAX9117EXK-T datasheet, MAX9117EXK-T pinout, MAX9117EXK-T application, or MAX9117EXK-T equivalent, key selection criteria include guaranteed sub-1.8V operation, internal reference accuracy and temperature coefficient, propagation delay vs. supply voltage, output swing under load, and SC70-5 package compatibility in space-constrained portable systems.

Technical Context

The MAX9117EXK-T integrates a PNP emitter-follower reference (120nA bias, 200kΩ output impedance) and a break-before-make push-pull output stage that minimizes supply-current surges during switching-reducing supply glitches and easing power-filtering requirements. Its input stage supports common-mode voltages beyond both rails by 200mV, enabling direct sensing at ground or supply lines without level-shifting.

Internal 4mV hysteresis ensures clean switching with slow or noisy inputs, and the device exhibits no phase reversal when overdriven. Propagation delays are asymmetric: tPD− = 14–16µs (high-to-low), tPD+ = 15–40µs (low-to-high), varying with supply voltage and load conditions.

Key Specifications

Pinout & Package

MAX9117EXK-T is housed in a 5-pin SC70-5 package (X5-1 code), measuring 2.0mm × 1.25mm × 0.9mm, with 0.65mm lead pitch and RoHS-compliant matte-tin plating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3691IDCKR and MAX9119EXK-T, the MAX9117EXK-T uniquely delivers integrated 1.252V reference with only 250nA higher supply current-enabling simpler, more reliable 2-cell battery monitoring without external components or layout overhead.

Availability

MAX9117EXK-T is available at Aetrix Electronics and suitable for 2-cell battery monitoring, ultra-low-power threshold detection, zero-crossing sensing, and mixed-voltage logic interfacing requiring stable component supply across industrial, medical, and portable electronics programs.

Supply support for MAX9117EXK-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and healthcare markets.

The MAX9117EXK-T belongs to the MAX9117–MAX9120 nanopower comparator family, engineered specifically for battery-operated systems where sub-microamp quiescent current, rail-exceeding input range, and integrated reference simplify voltage-monitoring designs.

FAQ

What is the operating voltage range of the MAX9117EXK-T?

The MAX9117EXK-T operates from +1.6V to +5.5V over the full −40°C to +85°C temperature range. At +1.6V supply, it draws only 600nA and maintains full functionality-including reference accuracy, input common-mode range extension beyond rails, and rail-to-rail output swing-making it ideal for direct 2-cell battery operation without regulation.

Does the MAX9117EXK-T require external components for basic threshold detection?

No. The MAX9117EXK-T integrates a 1.252V ±1.75% reference and 4mV internal hysteresis, enabling immediate use as a fixed-threshold detector with only VCC, GND, input signal, and load connected. No external reference, hysteresis resistors, or level-shifters are needed for standard 2-cell battery monitoring or ground-referenced sensing applications.

How does the MAX9117EXK-T minimize supply-line interference during switching?

The MAX9117EXK-T employs a unique break-before-make output stage that avoids crowbar current, limiting supply-current surges during output transitions to near steady-state levels. This design virtually eliminates supply glitches-reducing or eliminating the need for large bypass capacitors and simplifying power integrity in noise-sensitive, battery-powered systems using the MAX9117EXK-T.

Can the MAX9117EXK-T interface directly with 3V logic while powered from 5V?

Yes. When powered from +5V, the MAX9117EXK-T's push-pull output swings rail-to-rail (within 500mV of VEE/VCC), delivering a high-level output >4.5V and low-level output <500mV-fully compatible with 5V-tolerant 3V logic inputs. Its output drive strength (±5mA) ensures fast edge rates and noise immunity without external level-shifting circuitry.

What is the maximum capacitive load the MAX9117EXK-T can drive reliably?

The MAX9117EXK-T is characterized for stable operation with up to 15pF load capacitance, where propagation delays remain within specification (tPD− = 14µs at +5V). For larger loads (>50pF), output rise/fall times increase and may affect timing margins; adding a series resistor near the output or using a buffer is recommended for driving heavy capacitive loads such as long traces or multiple CMOS inputs.