Analog Devices Inc./Maxim Integrated MAX9142EKA+T

Overview

MAX9142EKA+T from Analog Devices is a dual high-speed comparator optimized for 3V/5V single-supply systems, featuring 40ns propagation delay, 150μA per comparator supply current, rail-to-rail inputs, and CMOS/TTL-compatible outputs. It operates across –40°C to +85°C (E grade) and is housed in an 8-pin SOT23 package, enabling compact threshold detection in battery-powered instrumentation.

For engineers reviewing the MAX9142EKA+T datasheet, MAX9142EKA+T pinout, MAX9142EKA+T application, or MAX9142EKA+T equivalent, this device is selected for low-power, high-speed analog decision-making where input common-mode range beyond rails, internal 1.5mV hysteresis, and output swing within 300mV of VCC/GND are critical design requirements.

Technical Context

The MAX9142EKA+T implements a bipolar process-based comparator core with internal hysteresis (1.5mV), enabling clean switching on slow-moving or noisy inputs without external feedback. Its rail-to-rail input stage accepts voltages from –0.2V to VCC + 0.2V, and its current-driven output stage delivers VOH = VCC – 0.3V and VOL = 0.3V at 4mA load.

Propagation delay skew between channels is ≤2ns (10mV overdrive), and differential propagation delay is also ≤2ns - confirming matched timing performance essential for dual-channel line receivers or zero-crossing detection. No latch or shutdown logic is present, distinguishing it from the MAX9141 variant.

Key Specifications

Pinout & Package

MAX9142EKA+T is packaged in an 8-pin SOT23 (package code K8-5), with 0.65mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. Pin 1 is marked with a dot; device orientation follows standard SOT23 top-view convention.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual high-speed comparator applications.

Compared with LM393DR2G and TLV3502IDR, MAX9142EKA+T uniquely balances 40ns speed, 150μA efficiency, rail-to-rail inputs, and built-in 1.5mV hysteresis - making it optimal for battery-powered, noise-immune, medium-speed decision circuits where component count and layout simplicity matter.

Availability

MAX9142EKA+T is available at Aetrix Electronics and suitable for line receivers, battery-powered systems, threshold discriminators, and 3V/5V mixed-signal interfaces requiring stable component supply and long-term production continuity.

Supply support for MAX9142EKA+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, and communications markets.

The MAX9142EKA+T belongs to the MAX914x family of single-supply comparators designed specifically for low-power, high-speed decision-making in portable and embedded systems operating from 3V or 5V rails.

FAQ

What is the operating temperature range for MAX9142EKA+T?

The MAX9142EKA+T is rated for the E-grade industrial temperature range of –40°C to +85°C. This specification is guaranteed across all electrical parameters including propagation delay, offset voltage, and supply current. The device uses a bipolar process and is not qualified to AEC-Q100; for automotive use, consider the MAX9140AAXK/V+T variant instead. MAX9142EKA+T maintains full functionality across this range without derating.

Does MAX9142EKA+T include shutdown or latch functionality?

No, MAX9142EKA+T does not include shutdown or latch functionality. These features are exclusive to the MAX9141 variant (e.g., MAX9141EKA+T), which adds SHDN and LE pins. The MAX9142EKA+T is a dual comparator with fixed active operation - all pins are dedicated to analog I/O (INA±, INB±, OUTA, OUTB), VCC, and GND. Power management must be handled externally if required.

What package type and marking does MAX9142EKA+T use?

MAX9142EKA+T is supplied in an 8-pin SOT23 package (package code K8-5) with RoHS-compliant lead-free finish (+T suffix). Its top-side marking is +AAFE, laser-etched on the package body. Pin 1 is identified by a dot; the device follows standard SOT23 pinout orientation with GND on pin 8 and VCC on pin 4. Land pattern #90-0176 applies.

Can MAX9142EKA+T drive TTL and CMOS logic directly?

Yes, MAX9142EKA+T outputs are fully compatible with both TTL and CMOS logic families. At VCC = 5V and ISINK = 4mA, VOL = 0.3V (well below TTL's 0.8V VIL max); at ISOURCE = 4mA, VOH = VCC – 0.3V = 4.7V (exceeding TTL's 2.0V VIH min and CMOS's 70% VCC threshold). No external pull-up resistors are needed - the output stage actively drives both rails.

Is internal hysteresis present in MAX9142EKA+T, and can it be adjusted?

Yes, MAX9142EKA+T includes fixed internal hysteresis of 1.5mV (input-referred), which ensures chatter-free switching on slow or noisy inputs. This hysteresis is not user-adjustable - it is inherent to the comparator core design. To increase noise immunity further, external positive feedback (e.g., resistor divider from OUTA to INA+) can be added, but doing so modifies the effective trip points and requires recalibration.