19-1266; Rev 1; 1/01
High-Speed, Micropower, Low-Voltage,
SOT23, Rail-to-Rail I/O Comparators
________________General Description
____________________________Features
ꢀ 120ns Propagation Delay
The MAX987/MAX988/MAX991/MAX992/MAX995/
MAX996 single/dual/quad micropower comparators
ꢀ 48µA Quiescent Supply Current
®
feature low-voltage operation and Rail-to-Rail inputs
and outputs. Their operating voltage ranges from +2.5V
to +5.5V, making them ideal for both 3V and 5V sys-
tems. These comparators also operate with 1.25V to
2.75V dual supplies. They consume only ꢀ8ꢁA per
comparator while achieving a 120ns propagation delay.
ꢀ +2.5V to +5.5V Single-Supply Operation
ꢀ Common-Mode Input Voltage Range Extends
250mV Beyond the Rails
ꢀ Push/Pull Output Stage Sinks and Sources
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.
8mA Current (MAX987/MAX991/MAX995)
ꢀ Open-Drain Output Voltage Extends Beyond V
CC
(MAX988/MAX992/MAX996)
ꢀ 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
MAX987/MAX991/MAX995 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 MAX988/MAX992/MAX996 have
an open-drain output stage that can be pulled beyond
Current, Minimizing Overall Power Consumption
ꢀ 100µA Supply Current at 1MHz Switching
Frequency
ꢀ No Phase Reversal for Overdriven Inputs
ꢀ Available in Space-Saving Packages:
5-Pin SOT23 (MAX987/MAX988)
8-Pin µMAX (MAX991/MAX992)
V
to 6V (max) above V . These open-drain versions
EE
CC
are ideal for level translators and bipolar to single-
ended converters.
_______________Ordering Information
The single MAX987/MAX988 are available in tiny 5-pin
SC70 packages, while the dual MAX991/MAX992 are
available in ultra-small 8-pin SOT23 packages.
PIN-
PACKAGE
TOP
MARK
PART
TEMP. RANGE
MAX987EXK-T
MAX987EUK-T
MAX987ESA
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
5 SC70-5
5 SOT23-5
8 SO
ABM
ABZB
—
Selector Guide
Ordering Information continued at end of data sheet.
COMPARATORS
PER PACKAGE
OUTPUT
STAGE
PART
Typical Application Circuit appears at end of data sheet.
MAX987
MAX988
MAX991
MAX992
MAX995
MAX996
1
1
2
2
4
4
Push/Pull
Open-Drain
Push/Pull
Pin Configurations
Open-Drain
Push/Pull
TOP VIEW
Open-Drain
1
2
3
5
4
V
OUT
EE
MAX987
MAX988
V
CC
Applications
Portable/Battery-
Powered Systems
Threshold Detectors/
Discriminators
IN+
IN-
Mobile Communications
Zero-Crossing Detectors
Window Comparators
Level Translators
Ground/Supply Sensing
IR Receivers
SOT23/SC70
Pin Configurations continued at end of data sheet.
Digital Line Receivers
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
________________________________________________________________ Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.