19-1299; Rev 3; 3/09
Single/Dual/Quad, SOT23, Single-Supply,
High-Speed, Low-Power Comparators
____________________________Features
The MAX976/MAX978/MAX998 dual/quad/single, highspeed, low-power comparators are optimized for
+3V/+5V single-supply applications. They achieve a
20ns propagation delay while consuming only 225µA
supply current per comparator. The MAX998 features a
low-power shutdown mode that places the output in a
high-impedance state and reduces supply current
to 1nA.
The MAX976/MAX978/MAX998 inputs have a commonmode voltage range that extends 200mV below ground.
Their outputs are capable of rail-to-rail operation without external pullup circuitry, making these devices ideal
for interface with CMOS/TTL logic. All inputs and outputs can tolerate a continuous short-circuit fault condition to either rail. The comparators’ internal hysteresis
ensures clean output switching, even with slow-moving
input signals.
For space-critical applications, the single MAX998 is
available in a 6-pin SOT23 package, the dual MAX976
is available in an 8-pin µMAX® package, and the quad
MAX978 is available in a 16-pin QSOP package.
♦ Single-Supply Operation Down to 2.7V
________________________Applications
Battery-Powered Systems
Threshold Detectors/Discriminators
♦ 20ns Propagation Delay
♦ 225µA Supply Current
♦ 1nA Shutdown Supply Current
♦ Rail-to-Rail Outputs
♦ Ground-Sensing Inputs
♦ Internal Hysteresis Ensures Clean Switching
♦ Available in Space-Saving Packages
SOT23 (MAX998)
µMAX (MAX976)
QSOP (MAX978)
_______________Ordering Information
PART*
MAX976ESA
8 SO
—
MAX976EUA
MAX978ESE
8 µMAX
16 Narrow SO
16 QSOP
—
—
—
MAX978EEE
3V Systems
IR Receivers
MAX998ESA
MAX998EUT-T
Digital Line Receivers
SOT
TOP MARK
PIN-PACKAGE
8 SO
6 SOT23
—
AAAO
*All devices are specified over the -40°C to +85°C temperature range.
___________Typical Operating Circuit
__________________Pin Configurations
TOP VIEW
VCC
VCC
OUT 1
0.1μF
VCC
RD
GND
6
VCC
5
SHDN
4
IN-
OUT
GND 2
SHDN
VCC
R1
MAX998
+ -
MAX998
IN+ 3
R2
VCC
SOT23
IR RECEIVER
Pin Configurations continued at end of data sheet
µMAX a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
1
MAX976/MAX978/MAX998
________________General Description
