MAX987 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators

19-1266; Rev 0b; 7/97
High-Speed, Micropower, Low-Voltage,
SOT23, Rail-to-Rail I/O Comparators
_______________General Description
The MAX987/MAX988/MAX991/MAX992/MAX995/
MAX996 single/dual/quad micropower comparators
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 48µA per
comparator while achieving a 120ns propagation delay.
The common-mode input voltage range extends 250mV
beyond the supply rails. 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.
The output stage’s unique design limits supply-current
surges while switching, virtually eliminating the supply
glitches typical of many other comparators. This design
also minimizes overall power consumption under
dynamic conditions. The MAX987/MAX991/MAX995
have a push/pull output stage that sinks as well as
sources current. Large internal 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 V_CC to 6V (max)
above V_EE. These open-drain versions are ideal for
level translators and bipolar to single-ended converters.
The single MAX987/MAX988 are available in tiny 5-pin
SOT23 packages.
_____________________Selector Guide
PART
COMPARATORS
PER PACKAGE
MAX987
1
OUTPUT
STAGE
Push/Pull
MAX988
1
MAX991
2
MAX992
2
MAX995
4
MAX996
4
Open-Drain
Push/Pull
Open-Drain
Push/Pull
Open-Drain
PIN-
PACKAGE
8 SO/
5 SOT23-5
8 SO/
5 SOT23-5
8 SO/µMAX
8 SO/µMAX
14 SO
14 SO
________________________Applications
Portable/Battery-
Powered Systems
Mobile Communications
Zero-Crossing Detectors
Window Comparators
Level Translators
Threshold Detectors/
Discriminators
Ground/Supply Sensing
IR Receivers
Digital Line Receivers
____________________________Features
o 120ns Propagation Delay
o 48µA Quiescent Supply Current
o +2.5V to +5.5V Single-Supply Operation
o Common-Mode Input Voltage Range Extends
250mV Beyond the Rails
o Push/Pull Output Stage Sinks and Sources
8mA Current (MAX987/MAX991/MAX995)
o Open-Drain Output Voltage Extends Beyond V_CC
(MAX988/MAX992/MAX996)
o Unique Output Stage Reduces Output Switching
Current, Minimizing Overall Power Consumption
o 100µA Supply Current at 1MHz Switching
Frequency
o No Phase Reversal for Overdriven Inputs
o Available in Space-Saving Packages:
5-Pin SOT23 (MAX987/MAX988)
8-Pin µMAX (MAX991/MAX992)
______________Ordering Information
PART
TEMP. RANGE
PIN-
PACKAGE
SOT
TOP MARK
MAX987EUK-T -40°C to +85°C 5 SOT23-5
ABZB
MAX987ESA -40°C to +85°C 8 SO
—
MAX988EUK-T -40°C to +85°C 5 SOT23-5 ABZC
MAX988ESA -40°C to +85°C 8 SO
—
Ordering Information continued at end of data sheet.
Typical Application Circuit appears at end of data sheet.
_________________Pin Configurations
TOP VIEW
OUT 1
V_CC 2
MAX987
MAX988
5 V_EE
IN+ 3
4 IN-
SOT23
Pin Configurations continued at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
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