MAX985/MAX986/MAX989/
MAX990/MAX993/MAX994
Micropower, Low-Voltage, UCSP/SC70,
Rail-to-Rail I/O Comparators
General Description
____________________________Features
The MAX985/MAX986/MAX989/MAX990/MAX993/
MAX994 single/dual/quad micropower comparators
feature low-voltage operation and rail-to-rail inputs and
outputs. Their operating voltages range from 2.5V to
5.5V, making them ideal for both 3V and 5V systems.
These comparators also operate with 1.25V to 2.ꢀ5V
dual supplies. They consume only 11µA of supply cur-
rent while achieving a 300ns propagation delay.
o 11µA Quiescent Supply Current
o 2.5V to 5.5V Single-Supply Operation
o Common-Mode Input Voltage Range Extends
250mV Beyond the Rails
o 300ns Propagation Delay
o Push-Pull Output Stage Sinks and Sources
8mA Current (MAX985/MAX989/MAX993)
Input bias current is typically 1.0pA, and input offset
voltage is typically 0.5mV. Internal hysteresis ensures
clean output switching, even with slow-moving input
signals.
o Open-Drain Output Voltage Extends Beyond V
CC
(MAX986/MAX990/MAX994)
o Unique Output Stage Reduces Output Switching
The output stage’s unique design limits supply-current
surges while switching, virtually eliminating the supply
glitches typical of many other comparators. The
MAX985/MAX989/MAX993 have a push-pull output
stage that sinks as well as sources current. Large inter-
nal output drivers allow rail-to-rail output swing with
loads up to 8mA. The MAX986/MAX990/MAX994 have
an open-drain output stage that can be pulled beyond
Current, Minimizing Overall Power Consumption
o 80µA Supply Current at 1MHz Switching
Frequency
o No Phase Reversal for Overdriven Inputs
o Available in Space-Saving Packages:
UCSP (MAX985)
SOT23 (MAX985/MAX986/MAX989/MAX990)
V
to 6V (max) above V . These open-drain versions
EE
CC
®
µMAX (MAX989/MAX990)
are ideal for level translators and bipolar to single-
ended converters.
Ordering Information
The single MAX985 is available in a chip-scale pack-
age (UCSP™), significantly reducing the required PC
board area. The single MAX985/MAX986 are available
in 5-pin SCꢀ0 packages and the dual MAX989/MAX990
are available in 8-pin SOT23 packages.
PART
PIN-PACKAGE
TOP MARK
AAY
MAX985EBT+TG45
MAX985EXK+T
6 UCSP
ABK
5 SCꢀ0
Note: All devices are specified over the -40°C to +85°C operating
temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Selector Guide
COMPARATORS
PER PACKAGE
OUTPUT
STAGE
T = Tape and reel.
G45 = Protective die coating.
PART
MAX985
MAX986
MAX989
MAX990
MAX993
MAX994
1
1
2
2
4
4
Push-Pull
Open-Drain
Push-Pull
Ordering Information continued at end of data sheet.
Typical Application Circuit appears at end of data sheet.
Pin Configurations
Open-Drain
Push-Pull
TOP VIEW
Open-Drain
(BUMPS ON BOTTOM)
IN+
B1
B2
B3
A1
A2
A3
V
EE
Applications
Threshold Detectors/
Discriminators
Ground/Supply-Sensing
Applications
IR Receivers
Portable/Battery-
Powered Systems
MAX985
IN-
OUT
Mobile Communications
Zero-Crossing Detectors
Window Comparators
Level Translators
N.C.
V
CC
Digital Line Receivers
UCSP
UCSP is a trademark and µMAX is a registered trademark of
Maxim Integrated Products, Inc.
Pin Configurations continued at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-1229; Rev 6; 8/12
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