Analog Devices Inc./Maxim Integrated MAX9077EKA

Overview

MAX9077EKA from Maxim Integrated is a dual, rail-to-rail input/output, ultra-low-power comparator optimized for single-supply portable systems. It delivers 580ns propagation delay at just 3µA per comparator, operates from 2.1V to 5.5V, and features ground-sensing inputs with common-mode range down to –0.2V - enabling direct battery-voltage threshold detection in keyless entry receivers and IR demodulators.

For engineers reviewing the MAX9077EKA datasheet, MAX9077EKA pinout, MAX9077EKA application, or MAX9077EKA equivalent, this device is selected for low-quiescent-current analog sensing where supply headroom is constrained, output interface compatibility with TTL/CMOS logic is required, and SOT23-8 footprint minimization is critical in space-limited PCB layouts.

Technical Context

The MAX9077EKA integrates two independent comparators sharing a single 2.1V–5.5V supply, each with push-pull outputs capable of sourcing/sinking 2mA while maintaining rail-to-rail swing. Its input stage lacks differential clamping, permitting rail-to-rail differential input voltage (±V_CC) without phase inversion - essential for overdriven signal recovery in digital line receivers.

Propagation delay is tightly specified at 580ns (typ) with 100mV overdrive and 10pF load; supply current remains stable across temperature (±1µA variation from –40°C to +85°C at V_CC = 3V), and internal design suppresses shoot-through current during switching to preserve dynamic power efficiency.

Key Specifications

Pinout & Package

MAX9077EKA is packaged in an 8-pin SOT23 (SO-8 thin) surface-mount package measuring 4.9mm × 6.0mm × 1.75mm, optimized for high-density portable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMV393IDR and TLV3702IDR, the MAX9077EKA uniquely combines ground-sensing inputs, rail-to-rail output drive, and 3µA quiescent current in an 8-pin SOT23 - making it the only option for battery-powered systems requiring sub-1mV offset accuracy and negative transient tolerance without external biasing.

Availability

MAX9077EKA is available at Aetrix Electronics and suitable for battery-powered systems, IR receivers, keyless entry modules, and digital line receivers requiring stable component supply across industrial temperature ranges (–40°C to +85°C).

Supply support for MAX9077EKA 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 portable markets.

The MAX9075/MAX9077 family was engineered specifically for ultra-low-power, space-constrained sensing nodes - prioritizing micropower operation, ground-referenced input flexibility, and logic-compatible outputs without external components.

FAQ

What is the maximum operating supply voltage for MAX9077EKA?

The MAX9077EKA has an absolute maximum supply voltage of 6V, but its guaranteed operational range is 2.1V to 5.5V. Operation above 5.5V risks permanent damage, and performance parameters like propagation delay and offset voltage are only specified within the 2.1V–5.5V range. For long-term reliability in production, MAX9077EKA should be operated strictly within this specified window.

Does MAX9077EKA support rail-to-rail input voltage, including below ground?

Yes, MAX9077EKA supports a common-mode input voltage range from –0.2V to V_CC – 1.2V, enabling true ground-sensing operation. This means the device can correctly compare signals referenced to GND (e.g., battery voltage dividers) and tolerate brief negative transients down to –0.2V without latch-up or phase inversion - a capability confirmed in the Electrical Characteristics table and Pin Description section of the MAX9077EKA datasheet.

Can MAX9077EKA drive standard TTL or CMOS logic directly?

Yes, MAX9077EKA features push-pull outputs that deliver rail-to-rail swing into loads up to 2mA. At V_CC = 3.3V, VOH ≥ 3.0V and VOL ≤ 0.4V meet 74LVC and 74AHC logic thresholds; at V_CC = 5V, VOH ≥ 4.6V and VOL ≤ 0.4V satisfy standard TTL requirements. No external pull-up resistors are needed, simplifying interface design for MAX9077EKA in mixed-voltage systems.

What is the typical propagation delay of MAX9077EKA and under what conditions is it measured?

The typical propagation delay of MAX9077EKA is 580ns, measured under standardized conditions: V_CC = 5V, C_LOAD = 10pF, input overdrive = 100mV, and temperature = +25°C. Both t_PD+ (low-to-high) and t_PD– (high-to-low) are specified at this value. Delay increases slightly at lower supply voltages (e.g., 620ns at V_CC = 2.1V) and with higher capacitive loads - all verified in the Typical Operating Characteristics plots of the MAX9077EKA datasheet.

Is MAX9077EKA pin-compatible with other dual comparators in SOT23-8 packages?

No, MAX9077EKA is not pin-compatible with generic dual comparators such as LM393 or TLV3702 in SOT23-8. Its pinout (GND, INA–, INA+, V_CC, OUTA, INB+, INB–, OUTB) differs from industry-standard arrangements. Substituting MAX9077EKA requires PCB layout revision. Always verify pin mapping against the MAX9077EKA Pin Configurations diagram before board design or replacement.