MAX985 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators

19-1229; Rev 3; 9/02
Micropower, Low-Voltage, UCSP/SC70,
Rail-to-Rail I/O Comparators
General Description
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 ±2.75V
dual supplies. They consume only 11µA of supply cur-
rent while achieving a 300ns propagation delay.
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. 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
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 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 SC70 packages and the dual MAX989/MAX990
are available in 8-pin SOT23 packages.
Selector Guide
PART
MAX985
MAX986
MAX989
MAX990
MAX993
MAX994
COMPARATORS
PER PACKAGE
1
1
2
2
4
4
OUTPUT
STAGE
Push-Pull
Open-Drain
Push-Pull
Open-Drain
Push-Pull
Open-Drain
Portable/Battery-
Powered Systems
Mobile Communications
Zero-Crossing Detectors
Window Comparators
Level Translators
Applications
Threshold Detectors/
Discriminators
Ground/Supply-Sensing
Applications
IR Receivers
Digital Line Receivers
UCSP is a trademark of Maxim Integrated Products, Inc.
____________________________Features
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)
o Open-Drain Output Voltage Extends Beyond V_CC
(MAX986/MAX990/MAX994)
o Unique Output Stage Reduces Output Switching
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)
µMAX (MAX989/MAX990)
Ordering Information
PART
TEMP RANGE
PIN/BUMP-
PACKAGE
TOP
MARK
MAX985EBT-T* -40°C to +85°C
MAX985EXK-T -40°C to +85°C
6 UCSP-6
5 SC70-5
AAY
ABK
*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.
Ordering Information continued at end of data sheet.
Typical Application Circuit appears at end of data sheet.
Pin Configurations
TOP VIEW
(BUMPS ON BOTTOM)
IN+ B1
A1 V_EE
MAX985
IN- B2
A2 OUT
N.C. B3
A3 V_CC
UCSP
Pin Configurations continued at end of data sheet.
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.