Analog Devices Inc./Maxim Integrated MAX9108ESD

Overview

MAX9108ESD from Maxim Integrated is a quad, high-speed, low-power voltage comparator IC operating from a single +5V supply. It delivers 25ns propagation delay with 10mV input overdrive, consumes only 350µA per comparator (1.75mW), and supports input common-mode range from −200mV to V_CC−1.5V. It is used in threshold detection, line receivers, and A/D converter front-ends where TTL-compatible outputs and internal hysteresis ensure clean switching.

For engineers reviewing the MAX9108ESD datasheet, MAX9108ESD pinout, MAX9108ESD application, or MAX9108ESD equivalent, this page provides verified package mapping (14-pin SO), confirmed electrical parameters (25ns t_PD, 500µV V_OS, 2mV hysteresis), TTL output drive capability, latch-free quad architecture, and real-world use context for battery-powered and industrial signal conditioning systems.

Technical Context

The MAX9108ESD implements four independent bipolar comparators with matched propagation delays (Δt_PD ≤ 1ns) and low skew (t_PDskew ≤ 5ns), enabling precise timing alignment across channels. Its input stage accepts signals down to −200mV below ground and up to 1.5V below V_CC, eliminating level-shifting needs in mixed-signal interfaces.

Each comparator features 2mV internal hysteresis referenced to input offset voltage (typ. 500µV), ensuring stable transitions without external feedback. Outputs are fully TTL-compatible-VOH ≥ 3.0V at 100µA source, VOL ≤ 0.6V at 3.2mA sink-requiring no pull-up resistors and simplifying integration into legacy logic systems.

Key Specifications

Pinout & Package

The MAX9108ESD is supplied in a 14-pin small-outline (SO) package (package code S14-1), RoHS-compliant, with standard 1.27mm pitch and 8.65mm × 3.91mm footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339DR and TLV3704IPW, the MAX9108ESD uniquely combines 25ns speed, TTL output drive, internal hysteresis, and 350µA power in a quad configuration-making it optimal for timing-critical, logic-integrated, and battery-aware designs where external components must be minimized.

Availability

MAX9108ESD is available at Aetrix Electronics and suitable for battery-powered systems, A/D converter front-ends, and industrial line receivers requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.

Supply support for MAX9108ESD 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 industrial, automotive, and communications applications.

The MAX9107/MAX9108/MAX9109 family was engineered specifically for high-speed, low-power comparator functions in space-constrained, battery-operated, and noise-sensitive systems-emphasizing fast propagation, internal hysteresis, and TTL compatibility without external components.

FAQ

What is the maximum operating supply voltage for the MAX9108ESD?

The MAX9108ESD has an absolute maximum supply voltage of 6V, but its guaranteed operational range is +4.5V to +5.5V. Operation outside this range may cause parametric degradation or damage. The MAX9108ESD is optimized for stable performance at nominal +5V, where propagation delay remains 25ns and supply current stays at 350µA per comparator.

Does the MAX9108ESD include an internal latch function like the MAX9109?

No, the MAX9108ESD does not include an internal latch. The latch feature is exclusive to the MAX9109 variant, as confirmed in the datasheet's "Features" and "Pin Description" sections. The MAX9108ESD provides four independent, transparent comparators with no latch-enable (LE) pin or storage functionality-making it suitable for real-time, non-latched signal comparison tasks.

What is the input common-mode voltage range specification for the MAX9108ESD?

The MAX9108ESD supports an input common-mode voltage range from −0.2V to V_CC−1.5V, meaning it accepts inputs 200mV below ground and up to 1.5V below the positive supply. This is verified across the full −40°C to +85°C temperature range and enables direct interfacing with ground-referenced sensors and op-amp outputs without level-shifting circuitry.

Can the MAX9108ESD drive standard TTL logic loads directly?

Yes, the MAX9108ESD outputs are fully TTL-compatible: VOH ≥ 3.0V at 100µA source current and VOL ≤ 0.6V at 3.2mA sink current. This allows direct connection to 74LS and 74F logic families without external pull-up resistors or level translators-reducing component count and improving signal integrity in timing-critical paths.

Is the MAX9108ESD pinout compatible with standard quad comparators such as the LM339?

The MAX9108ESD uses a different pinout than the LM339: MAX9108ESD places GND on pin 4 and V_CC on pin 5, whereas LM339 uses pin 4 for V_CC and pin 3 for GND. Although both are 14-pin SO packages, they are not pin-compatible. Direct replacement requires PCB layout revision; however, functional equivalence exists for non-latched, high-speed comparator applications.