Dual/Quad/Single, High-Speed, Ultra-Low-Power, Single-Supply TTL Comparators

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The MAX907/MAX908/MAX909 are dual/quad/single, high-speed, ultra-low-power voltage comparators designed for use in systems powered from a single +5V supply; the MAX909 also accepts dual ±5V supplies. Their 40ns propagation delay (with 5mV input overdrive) is achieved with a power consumption of only 3.5mW per comparator. The wide input common-mode range extends from 200mV below ground (below the negative supply rail for the MAX909) to within 1.5V of the positive supply rail.

Because they are micropower, high-speed comparators that operate from a single +5V supply and include built-in hysteresis, these devices replace a variety of older comparators in a wide range of applications. MAX907/MAX908/MAX909 outputs are TTL-compatible, requiring no external pullup circuitry. All inputs and outputs can be continuously shorted to either supply rail without damage. These easy-to-use comparators incorporate internal hysteresis to ensure clean output switching even when the devices are driven by a slow-moving input signal.

The MAX909 features complementary outputs and an output latch. A separate supply pin for extending the analog input range down to -5V is also provided.

The dual MAX907 and single MAX909 are available in 8-pin DIP and SO packages, and the quad MAX908 is available in 14-pin DIP and SO packages. These comparators are ideal for single +5V-supply applications that require the combination of high speed, precision, and ultra-low power dissipation.
MAX907, MAX908: Pin Configuration MAX907, MAX908: Pin Configuration Enlarge+

Key Features

  • 40ns Propagation Delay
  • 700µA (3.5mW) Supply Current per Comparator
  • Single 4.5V to 5.5V Supply Operation (or ±5V, MAX909 only)
  • Wide Input Range Includes Ground (or -5V, MAX909 only)
  • Low, 500µV Offset Voltage
  • Internal Hysteresis Provides Clean Switching
  • TTL-Compatible Outputs (Complementary on MAX909)
  • Input and Output Short-Circuit Protection
  • Internal Latch (MAX909 only)


  • Battery-Powered Systems
  • High-Speed A/D Converters
  • High-Speed Sampling Circuits
  • High-Speed V/F Converters
  • Line Receivers
  • Threshold Detectors/Discriminators
  • Zero-Crossing Detectors
Part NumberComp-
Input RangeVSUPPLY (Total)
ICC per Comp.
Logic OutOper. Temp.
typminmaxmaxtypmaxSee Notes
MAX907 240to Neg. Rail4.51110000.52Push-Pull
-55 to +125
-40 to +85
0 to +70
SOIC (N)/8
$1.89 @1k
MAX908 4
SOIC (N)/14
$3.23 @1k
See All Comparators (95)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Quality and Environmental Data

Request Reliability Report for: MAX909 
Lead-Free Package Tin (Sn) Whisker Reports

Tools & Models

  • MAX909 Test Circuit File
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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