19-1229; Rev 3; 9/02
Micropower, Low-Voltage, UCSP/SC70,
Rail-to-Rail I/O Comparators
General Description
____________________________Features
ꢀ 11µA Quiescent Supply Current
The MAX985/MAX986/MAX989/MAX990/MAX993/
MAX994 single/dual/quad micropower comparators
ꢀ 2.5V to 5.5V Single-Supply Operation
®
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.
ꢀ Common-Mode Input Voltage Range Extends
250mV Beyond the Rails
ꢀ 300ns Propagation Delay
ꢀ Push-Pull Output Stage Sinks and Sources
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.
8mA Current (MAX985/MAX989/MAX993)
ꢀ Open-Drain Output Voltage Extends Beyond V
CC
(MAX986/MAX990/MAX994)
ꢀ 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
ꢀ 80µA Supply Current at 1MHz Switching
Frequency
ꢀ No Phase Reversal for Overdriven Inputs
ꢀ Available in Space-Saving Packages:
UCSP (MAX985)
V
to 6V (max) above V . These open-drain versions
EE
CC
SOT23 (MAX985/MAX986/MAX989/MAX990)
µMAX (MAX989/MAX990)
are ideal for level translators and bipolar to single-
ended converters.
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.
Ordering Information
PIN/BUMP-
PACKAGE
TOP
MARK
PART
TEMP RANGE
MAX985EBT-T*
-40°C to +85°C
-40°C to +85°C
6 UCSP-6
5 SC70-5
AAY
ABK
MAX985EXK-T
Selector Guide
*UCSP reliability is integrally linked to the user’s assembly meth-
ods, circuit board material, and environment. Refer to the UCSP
Reliability section of this data sheet for more information.
COMPARATORS
PER PACKAGE
OUTPUT
STAGE
PART
Ordering Information continued at end of data sheet.
Typical Application Circuit appears at end of data sheet.
MAX985
MAX986
MAX989
MAX990
MAX993
MAX994
1
1
2
2
4
4
Push-Pull
Open-Drain
Push-Pull
Pin Configurations
Open-Drain
Push-Pull
TOP VIEW
(BUMPS ON BOTTOM)
Open-Drain
IN+
B1
B2
B3
A1
A2
A3
V
EE
Applications
Threshold Detectors/
Discriminators
Ground/Supply-Sensing
Applications
IR Receivers
MAX985
IN-
OUT
Portable/Battery-
Powered Systems
Mobile Communications
Zero-Crossing Detectors
Window Comparators
Level Translators
N.C.
V
CC
UCSP
Digital Line Receivers
Pin Configurations continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.