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 11A 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 (UCSPTM), 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.
____________________________Features
o 11A 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 80A 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)
MAX (MAX989/MAX990)
MAX985/MAX986/MAX989/MAX990/MAX993/MAX994
Micropower, Low-Voltage, UCSP/SC70,
Rail-to-Rail I/O Comparators
________________________________________________________________ Maxim Integrated Products
1
TOP VIEW
(BUMPS ON BOTTOM)
UCSP
MAX985
B1
B2
B3
A1
A2
A3
IN+
IN-
N.C.
V
EE
OUT
V
CC
Pin Configurations
19-1229; Rev 3; 9/02
Ordering Information
Ordering Information continued at end of data sheet.
Typical Application Circuit appears at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
Pin Configurations continued at end of data sheet.
Portable/Battery-
Powered Systems
Mobile Communications
Zero-Crossing Detectors
Window Comparators
Level Translators
Threshold Detectors/
Discriminators
Ground/Supply-Sensing
Applications
IR Receivers
Digital Line Receivers
PART
TEMP RANGE
PIN/BUMP-
PACKAGE
TOP
MARK
MAX985EBT-T*
-40C to +85C
6 UCSP-6
AAY
MAX985EXK-T
-40C to +85C
5 SC70-5
ABK
Applications
Selector Guide
PART
COMPARATORS
PER PACKAGE
OUTPUT
STAGE
MAX985
1
Push-Pull
MAX986
1
Open-Drain
MAX989
2
Push-Pull
MAX990
2
Open-Drain
MAX993
4
Push-Pull
MAX994
4
Open-Drain
UCSP is a trademark of Maxim Integrated Products, Inc.
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.
*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.
MAX985/MAX986/MAX989/MAX990/MAX993/MAX994
Micropower, Low-Voltage, UCSP/SC70,
Rail-to-Rail I/O Comparators
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= 2.7V to 5.5V, V
EE
= 0V, V
CM
= 0V, T
A
= -40C to +85C, unless otherwise noted. Typical values are at T
A
= +25C.) (Note 2)
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage (V
CC
to V
EE
) ...................................................6V
IN_-, IN_+ to V
EE
.......................................-0.3V to (V
CC
+ 0.3V)
OUT_ to V
EE
MAX985/MAX989/MAX993 ....................-0.3V to (V
CC
+ 0.3V)
MAX986/MAX990/MAX994.....................................-0.3V to 6V
OUT_ Short-Circuit Duration to V
EE
or V
CC
...........................10s
Continuous Power Dissipation (T
A
= +70C)
5-Pin SC70 (derate 3.1mW/C above +70C) ...............247mW
5-Pin SOT23 (derate 7.10mW/C above +70C)...........571mW
6-Bump UCSP (derate 3.9mW/C above +70C)..........308mW
8-Pin SOT23 (derate 9.1mW/C above +70C).............727mW
8-Pin MAX (derate 4.5mW/C above +70C) ..............362mW
8-Pin SO (derate 5.88mW/C above +70C).................471mW
14-Pin TSSOP (derate 9.1mW/C above +70C) ..........727mW
14-Pin SO (derate 8.33mW/C above +70C)...............667mW
Operating Temperature Range ...........................-40C to +85C
Junction Temperature ......................................................+150C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10s) .................................+300C
Bump Reflow Temperature (Note 1) ................................+235C
Inferred from PSRR test
CONDITIONS
V
2.5
5.5
V
CC
Supply Voltage
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
12
20
2.5V
V
CC
5.5V
dB
55
80
PSRR
Power-Supply Rejection Ratio
V
CC
= 5V
24
mV
0.5
5
T
A
= +25C
V
EE
-
V
CC
+
0.25
0.25
3
V
HYST
Input Hysteresis
Full common-mode
range
nA
I
B
Input Bias Current
(Note 5)
0.001
10
pF
1.0
C
IN
Input Capacitance
dB
52
80
CMRR
Common-Mode Rejection Ratio
pA
0.5
I
OS
Input Offset Current
7
V
OS
Input Offset Voltage
(Note 4)
V
OUT
= high
A
1.0
I
LEAK
Output Leakage Current
(MAX986/MAX990/
MAX994 only)
35
95
T
A
= +25C
T
A
= -40C to +85C
11
20
V
CC
= 2.7V
A
24
I
CC
Supply Current per
Comparator
T
A
= +25C
T
A
= -40C to +85C
Sourcing or sinking,
V
OUT
= V
EE
or V
CC
I
SC
Output Short-Circuit Current
T
A
= +25C
T
A
= -40C to +85C
T
A
= -40C to +85C
V
EE
V
CC
V
V
CMR
Common-Mode Voltage
Range (Note 3)
mV
V
CC
= 5V
V
CC
= 2.7V
mA
V
CC
= 5V,
I
SINK
= 8mA
0.55
0.2
0.4
V
OL
OUT Output Voltage Low
V
CC
= 2.7V,
I
SINK
= 3.5mA
V
0.4
0.15
0.3
T
A
= +25C
T
A
= -40C to +85C
T
A
= +25C
T
A
= -40C to +85C
Note 1: This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device
can be exposed to during board-level solder attach and rework. This limit permits only the use of the solder profiles recom-
mended in the industry-standard specification, JEDEC 020A, paragraph 7.6,
Table
3 for IR/VPR and Convection Packaging
Reflow. Preheating is required. Hand or wave soldering is not allowed.
MAX985/MAX986/MAX989/MAX990/MAX993/MAX994
Micropower, Low-Voltage, UCSP/SC70,
Rail-to-Rail I/O Comparators
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 2.7V to 5.5V, V
EE
= 0V, V
CM
= 0V, T
A
= -40C to +85C, unless otherwise noted. Typical values are at T
A
= +25C.) (Note 2)
CONDITIONS
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
s
20
t
PU
Power-Up Time
ns
V
CC
= 5.0V
80
t
FALL
OUT Fall Time
50
40
300
450
100mV overdrive
100mV overdrive
C
L
= 15pF
300
t
PD+
Propagation Delay
450
ns
450
t
PD-
300
MAX985/MAX989/
MAX993 only
10mV overdrive
100mV overdrive
MAX985/MAX989/
MAX993 only, C
L
= 15pF
10mV overdrive
10mV overdrive
C
L
= 15pF
C
L
= 50pF
C
L
= 200pF
MAX986/MAX990/
MAX994 only,
R
PULLUP
= 5.1k
Note 2: All device specifications are 100% production tested at T
A
= +25C. Limits over the extended temperature range are guar-
anteed by design.
Note 3: Inferred from the V
OS
test. Both or either inputs can be driven 0.3V beyond either supply rail without output phase reversal.
Note 4: V
OS
is defined as the center of the hysteresis band at the input.
Note 5: I
B
is defined as the average of the two input bias currents (I
B-
, I
B+
).
C
L
= 15pF
C
L
= 50pF
C
L
= 200pF
V
CC
= 5.0V
ns
80
t
RISE
OUT Rise Time
(MAX985/MAX989/
MAX993 only)
50
40
V
CC
= 5V,
I
SOURCE
= 8mA
V
4.6
4.85
V
OH
OUT Output Voltage High
(MAX985/MAX989/
MAX993 only)
T
A
= +25C
4.45
T
A
= -40C to +85C
V
CC
= 2.7V,
I
SOURCE
= 3.5mA
2.4
2.55
T
A
= +25C
2.3
T
A
= -40C to +85C
MAX985/MAX986/MAX989/MAX990/MAX993/MAX994
Micropower, Low-Voltage, UCSP/SC70,
Rail-to-Rail I/O Comparators
4
_______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
(V
CC
= 5V, V
CM
= 0V, T
A
= +25C, unless otherwise noted.)
10,000
1
0.01
0.1
1
10
100
OUTPUT LOW VOLTAGE
vs. OUTPUT SINK CURRENT
MAX985-04
OUTPUT SINK CURRENT (mA)
OUTPUT LOW VOLTAGE (mV) (V
OL
)
10
100
1000
V
IN+
< V
IN-
V
CC
= 2.7V
V
CC
= 5.0V
600
350
0
200
1000
PROPAGATION DELAY
vs. CAPACITIVE LOAD (V
CC
= 3V)
500
450
400
550
MAX985-05a
CAPACITIVE LOAD (pF)
t
PD
(ns)
400
800
600
V
OD
= 50mV
TO V
OUT
= 50% OF
FINAL VALUE
TO V
OUT
= 10% OF
FINAL VALUE
120
0
-60
100
OUTPUT SHORT-CIRCUIT
CURRENT vs. TEMPERATURE
20
10
90
80
110
100
MAX985-06
TEMPERATURE (C)
OUTPUT SINK CURRENT (mA)
-40
-20
0
20
40
60
80
70
60
50
40
30
V
CC
= 5.0V
V
CC
= 2.7V
530
350
0
200
1000
PROPAGATION DELAY
vs. CAPACITIVE LOAD (V
CC
= 5V)
450
430
410
390
370
510
490
470
MAX985-05b
CAPACITIVE LOAD (pF)
t
PD
(ns)
400
800
600
V
OD
= 50mV
TO V
OUT
= 50% OF
FINAL VALUE
TO V
OUT
= 10% OF
FINAL VALUE
1.1
-0.3
-60
100
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
-0.1
0.7
0.9
MAX985-07
TEMPERATURE (C)
OFFSET VOLTAGE (mV)
-40
-20
0
20
40
60
80
0.5
0.3
0.1
10,000
0.1
0.01
0.1
1
10
100
OUTPUT HIGH VOLTAGE
vs. OUTPUT SOURCE CURRENT
1
MAX985-08
OUTPUT SOURCE CURRENT (mA)
OUTPUT HIGH VOLTAGE (V
CC
- V
OH
)
(mV)
10
100
1000
V
IN+
> V
IN-
V
CC
= 5.0V
V
CC
= 2.7V
18
8
-60
100
SUPPLY CURRENT
vs. TEMPERATURE
10
9
16
17
15
MAX985-01
TEMPERATURE (
C)
SUPPLY CURRENT (
A)
-40
-20
0
20
40
60
80
14
13
12
11
V
IN+
> V
IN-
V
CC
= 5.0V
V
CC
= 2.7V
1000
1
0.01
0.1
1
10
100
1000
SUPPLY CURRENT vs.
OUTPUT TRANSITION FREQUENCY
MAX985-02
OUTPUT TRANSITION FREQUENCY (kHz)
SUPPLY CURRENT (
A)
10
100
V
CC
= 5.0V
V
CC
= 2.7V
MAX985/MAX986/MAX989/MAX990/MAX993/MAX994
Micropower, Low-Voltage, UCSP/SC70,
Rail-to-Rail I/O Comparators
_______________________________________________________________________________________
5
MAX985/MAX989/MAX993
SWITCHING CURRENT, OUT RISING
IN+
OUT
I
CC
MAX985-13
100ns/div
50mV/
div
2V/div
1mA/div
V
OD
= 50mV
SWITCHING CURRENT, OUT FALLING
IN+
OUT
I
CC
MAX985-14
100ns/div
50mV/
div
2V/div
1mA/div
V
OD
= 50mV
1MHz RESPONSE
IN+
OUT
MAX985-15
200ns/div
50mV/
div
2V/div
V
OD
= 50mV
POWER-UP DELAY
V
CC
OUT
MAX985-16
5
s/div
V
IN-
= 50mV
V
IN+
= 0V
900
800
700
600
0
0
80
120
160
200
PROPAGATION DELAY
vs. INPUT OVERDRIVE
500
400
300
200
100
MAX985-10
INPUT OVERDRIVE (mV)
t
PD
(ns)
40
V
CC
= 2.7V
V
CC
= 5.0V
450
380
-40
100
PROPAGATION DELAY
vs. TEMPERATURE
390
430
440
MAX985-09
TEMPERATURE (C)
t
PD
(ns)
-20
0
20
40
60
80
420
410
400
TO V
OUT
= 50% POINT
OF FINAL VALUE
TO V
OUT
= 10% POINT
OF FINAL VALUE
V
OD
= 50mV
MAX985/MAX989/MAX993
PROPAGATION DELAY (t
PD+
)
IN+
OUT
MAX985-11
100ns/div
50mV/
div
2V/div
V
OD
= 50mV
PROPAGATION DELAY (t
PD-
)
IN+
OUT
MAX985-12
100ns/div
50mV/
div
2V/div
V
OD
= 50mV
____________________________Typical Operating Characteristics (continued)
(V
CC
= 5V, V
CM
= 0V, T
A
= +25C, unless otherwise noted.)
PDF 
ZIP