MAX985, MAX986, MAX989, MAX990, MAX993, MAX994 Micropower, Low-Voltage, UCSP/SC70, Rail-to-Rail I/O Comparators

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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 current 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 internal 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 package (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.

Key Features

Applications/Uses

11µA Quiescent Supply Current
2.5V to 5.5V Single-Supply Operation
Common-Mode Input Voltage Range Extends 250mV Beyond the Rails
300ns Propagation Delay
Push-Pull Output Stage Sinks and Sources 8mA Current (MAX985/MAX989/MAX993)
Open-Drain Output Voltage Extends Beyond V_CC (MAX986/MAX990/MAX994)
Unique Output Stage Reduces Output Switching 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)
- SOT23 (MAX985/MAX986/MAX989/MAX990)
- µMAX® (MAX989/MAX990)

	Digital-Line Receivers
	Ground/Supply Sensing
	IR Receivers
	Level Translators
	Mobile Communications
	Portable Battery-Powered Systems
	Threshold Detectors
	Window Comparators
	Zero-Crossing Detectors

Key Specifications: Comparators

Part Number

Number per Pkg.

Typ Prop. Delay (ns)

Input CMVR to Neg. Rail

Min. Total Supply (V)

Max. Total Supply (V)

Max. Supply Current per Comp. (µA)

Typ V_OS (mV)

Logic Output

Latched Outputs

Complementary Outputs

Package

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^*

MAX985

300

Yes

2.5

5.5

0.5

CMOS
TTL

SC-70/5
SOIC/8
SOT-23/5
UCSP/6

-40 to +85

$0.44 @ 1k

MAX986

SC-70/5
SOIC/8
SOT-23/5

$0.66 @ 1k

MAX989

SOIC/8
SOT-23/8
uMAX/8

$1.05 @ 1k

MAX990

SOIC/8
SOT-23/8
uMAX/8

$1.05 @ 1k

MAX993

SOIC/14
TSSOP/14

$1.58 @ 1k

MAX994

SOIC/14
TSSOP/14

$1.58 @ 1k

See All Comparators (82)

Notes:
^*This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.