Micropower, Low-Voltage, UCSP/SC70,
Rail-to-Rail I/O Comparators
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
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
VCC to 6V (max) above VEE. These open-drain versions
are ideal for level translators and bipolar to single-
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.
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 VCC
o Unique Output Stage Reduces Output Switching
Current, Minimizing Overall Power Consumption
o 80µA Supply Current at 1MHz Switching
o No Phase Reversal for Overdriven Inputs
o Available in Space-Saving Packages:
MAX985EBT+TG45 6 UCSP
Note: All devices are specified over the -40°C to +85°C operating
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
G45 = Protective die coating.
Ordering Information continued at end of data sheet.
Typical Application Circuit appears at end of data sheet.
(BUMPS ON BOTTOM)
Digital Line Receivers
UCSP is a trademark and µMAX is a registered trademark of
Maxim Integrated Products, Inc.
Pin Configurations continued at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-1229; Rev 6; 8/12