±9-±229; Rev 5; 4/±2
Micropower, Low-Voltage, UCSP/SC70,
Rail-to-Rail I/O Comparators
56803/MAX94
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 ±±.25V to ±2.ꢀ5V
dual supplies. They consume only ±±µA 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 ±.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+T
MAX985EXK+T
6 UCSP-6
ABK
5 SCꢀ0-5
Note: All devices are specified over the -40°C to +85°C operating
temperature range.
Selector Guide
+Denotes a lead(Pb)-free/RoHS-compliant package.
COMPARATORS
PER PACKAGE
OUTPUT
STAGE
PART
T = Tape and reel.
MAX985
MAX986
MAX989
MAX990
MAX993
MAX994
±
±
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.
1
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.
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