Not Recommended for New Designs
The MAX909 was manufactured for Maxim by an outside wafer
foundry using a process that is no longer available. It is not
recommended for new designs. A Maxim replacement or an industry
second-source may be available. The data sheet remains available for
existing users.
The other parts on the following data sheet are not
affected.
For further information, please see the QuickView data sheet for this
part or contact
technical support
for assistance.
19-0129; Rev 7; 1/06
Dual/Quad/Single, High-Speed, Ultra-Low-Power,
Single-Supply TTL Comparators
General Description
The MAX907/MAX908/MAX909 are dual/quad/single,
high-speed, ultra-low-power voltage comparators
designed for use in systems powered from a single
+5V supply; the MAX909 also accepts dual ±5V sup-
plies. Their 40ns propagation delay (with 5mV input
overdrive) is achieved with a power consumption of
only 3.5mW per comparator. The wide input common-
mode range extends from 200mV below ground (below
the negative supply rail for the MAX909) to within 1.5V
of the positive supply rail.
Because they are micropower, high-speed compara-
tors that operate from a single +5V supply and include
built-in hysteresis, these devices replace a variety of
older comparators in a wide range of applications.
MAX907/MAX908/MAX909 outputs are TTL-compatible,
requiring no external pullup circuitry. All inputs and out-
puts can be continuously shorted to either supply rail
without damage. These easy-to-use comparators incor-
porate internal hysteresis to ensure clean output switch-
ing even when the devices are driven by a slow-moving
input signal.
The MAX909 features complementary outputs and an
output latch. A separate supply pin for extending the
analog input range down to -5V is also provided.
The dual MAX907 and single MAX909 are available in
8-pin DIP and SO packages, and the quad MAX908 is
available in 14-pin DIP and SO packages. These com-
parators are ideal for single +5V-supply applications
that require the combination of high speed, precision,
and ultra-low power dissipation.
Features
♦
40ns Propagation Delay
♦
700µA (3.5mW) Supply Current per Comparator
♦
Single 4.5V to 5.5V Supply Operation
(or ±5V, MAX909 only)
♦
Wide Input Range Includes Ground
(or -5V, MAX909 only)
♦
Low, 500µV Offset Voltage
♦
Internal Hysteresis Provides Clean Switching
♦
TTL-Compatible Outputs
(Complementary on MAX909)
♦
Input and Output Short-Circuit Protection
♦
Internal Latch (MAX909 only)
MAX907/MAX908/MAX909
Ordering Information
PART
MAX907CPA
MAX907CSA
MAX907EPA
MAX907ESA
MAX907MSA/PR*
TEMP RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
PIN-PACKAGE
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 SO
Ordering Information continued at end of data sheet.
*Go
to www.maxim-ic.com/PR-1 for details on high-reliability
plastic processing.
Pin Configurations
TOP VIEW
OUTA
INA-
1
2
8
7
6
MAX907
5
V+
OUTB
INB-
INB+
Applications
Battery-Powered Systems
High-Speed A/D Converters
High-Speed V/F Converters
Line Receivers
Threshold Detectors/Discriminators
High-Speed Sampling Circuits
Zero-Crossing Detectors
INA+
3
GND
4
DIP/SO
OUTA
INA-
1
2
14
OUTD
13
IND-
12
IND+
MAX908
11
GND
10
INC+
9
8
INC-
OUTC
INA+
3
V+
4
INB+
5
INB-
6
OUTB
7
DIP/SO
Pin Configurations continued at end of data sheet.
________________________________________________________________ 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.
Dual/Quad/Single, High-Speed, Ultra-Low-Power,
Single-Supply TTL Comparators
MAX907/MAX908/MAX909
ABSOLUTE MAXIMUM RATINGS
Positive Supply Voltage (V+ to GND) . . . . . . . . . . . . . . . . . . . . . . . . +6V
Negative Supply Voltage (V- to GND, MAX909 only) . . . . . . . . . -7V
Differential Input Voltage
MAX907/MAX908 . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V+ + 0.3V)
MAX909 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (V- - 0.3V) to (V+ + 0.3V)
Common-Mode Input Voltage
MAX907/MAX908 . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V+ + 0.3V)
MAX909 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (V- - 0.3V) to (V+ + 0.3V)
Latch Input Voltage (MAX909 only) . . . . . . . . . -0.3V to (V+ + 0.3V)
Input/Output Short-Circuit Duration to V+ or GND . . . Continuous
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) . . . 727mW
8-Pin SO (derate 5.88mW/°C above +70°C) . . . . . . . . . . . 471mW
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) . . . 800mW
14-Pin SO (derate 8.33mW/°C above +70°C) . . . . . . . . . . 667mW
Operating Temperature Ranges:
MAX90_C_ _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
MAX90_E_ _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
MAX907MSA/PR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55°C to +125°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . -65°C to +150°C
Lead Temperature (soldering, 10s) . . . . . . . . . . . . . . . . . . . . . . +300°C
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.
ELECTRICAL CHARACTERISTICS
(V+ = 5V,
T
A
= +25°C;
MAX909 only: V- = 0V, V
LATCH
= 0V; unless otherwise noted.)
PARAMETER
Positive Trip Point
Negative Trip Point
Input Offset Voltage
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Output High Voltage
Output Low Voltage
Positive Supply Current per
Comparator
Negative Supply Current
Power Dissipation per
Comparator
Output Rise Time
Output Fall Time
SYMBOL
V
TRIP+
V
TRIP-
V
OS
I
B
I
OS
V
CMR
CMRR
PSRR
V
OH
V
OL
I+
I-
PD
t
r
t
f
CONDITIONS
(Note 1)
(Note 1)
(Note 2)
V
CM
= 0V, V
IN
= V
OS
V
CM
= 0V, V
IN
= V
OS
(Notes 3, 4)
(Notes 4, 5)
(Notes 4, 6)
I
SOURCE
= 100µA
I
SINK
= 3.2mA
I
SINK
= 8mA
(Note 7)
MAX907/MAX908
MAX909
MAX907/MAX908
3.0
MAX907/MAX908/MAX909 -0.2
MAX909 only: V- = -5V
-5.2
50
50
3.5
0.36
0.4
0.7
1.2
60
3.5
6
12
6
1.0
1.8
100
5.5
10
0.475
MIN
TYP
2
-2
0.5
100
25
MAX
4
-4
2.0
300
50
V+ - 1.5
V+ - 1.5
150
200
UNITS
mV
mV
mV
nA
nA
V
µV/V
µV/V
V
V
mA
µA
mW
ns
ns
MAX909 only: V- = -5V
(Note 8)
MAX909
V
OUT
= 0.4V to 2.4V, C
L
= 10pF
V
OUT
= 2.4V to 0.4V, C
L
= 10pF
2
_______________________________________________________________________________________
Dual/Quad/Single, High-Speed, Ultra-Low-Power,
Single-Supply TTL Comparators
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 5V,
T
A
= +25°C;
MAX909 only: V- = 0V, V
LATCH
= 0V; unless otherwise noted.)
PARAMETER
Propagation Delay
Differential Propagation Delay
Propagation Delay Skew
Latch Input Voltage High
Latch Input Voltage Low
Latch Input Current
Latch Setup Time
Latch Hold Time
SYMBOL
t
PD+,
t
PD-
∆t
PD
t
PD
skew
V
IH
V
IL
I
IH
, I
IL
t
s
t
h
CONDITIONS
V
IN
= 100mV, V
OD
= 5mV
(Note 9)
V
IN
= 100mV, V
OD
= 5mV
(Note 10)
MAX909 only: V
IN
= 100mV,
V
OD
= 5mV (Note 11)
(Note 12)
(Note 12)
(Note 12)
(Note 12)
(Note 12)
2
2
2.0
0.8
20
MIN
TYP
40
1
2
MAX
50
UNITS
ns
ns
ns
V
V
µA
ns
ns
MAX907/MAX908/MAX909
ELECTRICAL CHARACTERISTICS
(V+ = 5V,
T
A
= T
MIN
to T
MAX
; MAX909 only: V- = 0V, V
LATCH
= 0V; unless otherwise noted.)
PARAMETER
Positive Trip Point
Negative Trip Point
Input Offset Voltage
Input Bias Current
Input Offset Current
SYMBOL
V
TRIP+
V
TRIP-
V
OS
I
B
I
OS
(Note 1)
(Note 1)
(Note 2)
V
CM =
0V, V
IN =
V
OS
V
CM =
0V
,
V
IN =
V
OS
C/E temp.
ranges
(Notes 3, 4)
M temp. range
(Notes 3, 4)
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Output High Voltage
Output Low Voltage
Positive Supply Current per
Comparator
Negative Supply Current
Power Dissipation per
Comparator
CMRR
PSRR
V
OH
V
OL
(Notes 4, 5)
(Notes 4, 6)
I
SOURCE =
100µA
T
A =
T
MAX
I
SINK
= 3.2mA
T
MIN =
0°C
T
MIN = -
40°C
I+
I-
PD
(Note 7)
MAX909 only; V- = -5V
(Note 8)
MAX907/MAX908
MAX909
MAX907/MAX908
MAX909
0.8
1.2
100
4
6
2.8
MAX907/MAX908/MAX909
MAX909 only, V- = -5V
MAX907MSA/PR
-0.2
-5.2
-0.1
75
75
3.5
0.45
0.525
0.550
1.2
2.0
200
7
11
mA
µV
mW
V
CONDITIONS
MIN
TYP
2
-2
1
200
50
MAX
5
-5
3.5
500
100
V+ - 1.5
V+ - 1.5
V+ - 1.5
300
400
µV/V
µV/V
V
V
UNITS
mV
mV
mV
nA
nA
Input Voltage Range
V
CMR
_______________________________________________________________________________________
3
Dual/Quad/Single, High-Speed, Ultra-Low-Power,
Single-Supply TTL Comparators
MAX907/MAX908/MAX909
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 5V,
T
A
= T
MIN
to T
MAX
; MAX909 only: V- = 0V, V
LATCH
= 0V; unless otherwise noted.)
PARAMETER
Propagation Delay
Differential Propagation Delay
Propagation Delay Skew
Latch Input Voltage High
Latch Input Voltage Low
Latch Input Current
Latch Setup Time
Latch Hold Time
Note 1:
SYMBOL
t
PD+,
t
PD-
∆t
PD
t
PD
skew
V
IH
V
IL
I
IH
, I
IL
t
s
t
h
CONDITIONS
V
IN
= 100mV, V
OD
= 5mV
(Note 9)
V
IN
= 100mV, V
OD
= 5mV
(Note 10)
MAX909 only: V
IN
= 100mV,
V
OD
= 5mV (Note 11)
(Note 12)
(Note 12)
(Note 12)
(Note 12)
(Note 12)
4
4
2.0
0.8
20
MIN
TYP
45
2
4
MAX
70
UNITS
ns
ns
ns
V
V
µA
ns
ns
Trip Point is defined as the input voltage required to make the comparator output change state. The difference
between upper (V
TRIP
+) and lower (V
TRIP
-) trip points is equal to the width of the input-referred hysteresis zone (V
HYST
).
Specified for an input common-mode voltage (V
CM
) of 0V (see Figure 1).
Note 2:
Input Offset Voltage is defined as the center of the input-referred hysteresis zone. Specified for V
CM
= 0V (see Figure 1).
Note 3:
Inferred from the CMRR test. Note that a correct logic result is obtained at the output, provided that at least one input is
within the V
CMR
limits. Note also that either or both inputs can be driven to the upper or lower absolute maximum limit with-
out damage to the part.
Note 4:
Tested with V+ = 5.5V (and V- = 0V for MAX909). MAX909 also tested over the full analog input range (i.e., with
V- = -5.5V).
Note 5:
Tested over the full input voltage range (V
CMR
).
Note 6:
Specified over the full tolerance of operating supply voltage: MAX907/MAX908 tested with 4.5V < V+ < 5.5V. MAX909
tested with 4.5V < V+ < 5.5V and with -5.5V < V- < 0V.
Note 7:
Positive Supply Current specified with the worst-case condition of all outputs at logic low (MAX907/MAX908), and
with V+ = 5.5V.
Note 8:
Typical power specified with V+ = 5V; maximum with V+ = 5.5V (and with V- = -5.5V for MAX909).
Note 9:
Due to difficulties in measuring propagation delay with 5mV of overdrive in automatic test equipment, this parameter is
guaranteed by design for the MAX907 and MAX908. Correlation tests show that the specification can be guaranteed if all
other DC parameters are within the specified limits. V
OS
must be added to the overdrive voltage for low values of overdrive.
For the MAX909, propagation delay is typical only and there is no guaranteed maximum limit.
Note 10:
Differential Propagation Delay is specified as the difference between any two channels in the MAX907/MAX908 (both out-
puts making either a low-to-high or a high-to-low transition).
Note 11:
Propagation Delay Skew is specified as the difference between any single channel’s output low-to-high transition (t
PD
+)
and high-to-low transition (t
PD
-), and also between the QOUT and
QOUT
transition on the MAX909.
Note 12:
Latch specifications apply to MAX909 only (see Figure 2).
4
_______________________________________________________________________________________
