MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
________________________________________________________________ Maxim Integrated Products 1
TOP VIEW
1
2
3
45
6
7
8
SO
N.C.
OUT
GND
LE
VCC
IN+
IN-
N.C.
MAX9109
1
2
3
45
6
7
8
SOT23/SO
VCC
OUTB
INB-
INB+
OUTA
INA-
INA+
GND
MAX9107
14
13
12
11
10
9
8
1
2
3
4
5
6
7
OUTD
IND-
IND+
GNDVCC
INA+
INA-
OUTA
MAX9108
INC+
INC-
OUTCOUTB
INB-
INB+
TSSOP/SO
AD
BC
GND
IN-IN+
16VCC
5LE
OUT
MAX9109
SC70/SOT23
2
34
Pin Configurations
19-2045; Rev. 2; 1/07
General Description
The MAX9107/MAX9108/MAX9109 dual/quad/single,
high-speed, low-power voltage comparators are
designed for use in systems powered from a single
+5V supply. Their 25ns propagation delay (with 10mV
input overdrive) is achieved with a power consumption
of only 1.75mW per comparator. The wide input com-
mon-mode range extends from 200mV below ground
to within 1.5V of the positive supply rail.
The MAX9107/MAX9108/MAX9109 outputs are TTL-
compatible, requiring no external pullup circuitry.
These easy-to-use comparators incorporate internal
hysteresis to ensure clean output switching even when
the devices are driven by a slow-moving input signal.
The MAX9107/MAX9108/MAX9109 are higher-speed,
lower-power, lower-cost upgrades to industry-standard
comparators MAX907/MAX908/MAX909. The MAX9109
features an output latch but does not have comple-
mentary outputs.
The dual MAX9107 is available in both 8-pin SO and
SOT23 packages. The quad MAX9108 is available in
14-pin TSSOP and SO packages while the single
MAX9109 is available in an ultra-small 6-pin SC70
package, a space-saving 6-pin SOT23 package and
an 8-pin SO package.
Applications
Features
♦25ns Propagation Delay
♦350µA (1.75mW) Supply Current Per Comparator
♦Single 4.5V to 5.5V Supply Operation
♦Wide Input Range Includes Ground
♦Low 500µV Offset Voltage
♦Internal Hysteresis Provides Clean Switching
(2mV)
♦TTL-Compatible Outputs
♦Internal Latch (MAX9109 only)
♦Space-Saving Packages:
6-Pin SC70 (MAX9109)
8-Pin SOT23 (MAX9107)
14-Pin TSSOP (MAX9108)
Ordering Information
PART PIN-
PACKAGE
TOP
MARK
PKG
CODE
MAX9107EKA-T 8 SOT23-8 AAIB K8-5
MAX9107ESA 8 SO — S8-2
MAX9108EUD 14 TSSOP — U14-1
MAX9108ESD 14 SO — S14-1
MAX9109EXT-T 6 SC70-6 AAU X6S-1
MAX9109EUT-T 6 SOT23-6 AARU U6-1
MAX9109ESA 8 SO — S8-2
Battery-Powered Systems
A/D Converters
Line Receivers
Threshold Detectors/
Discriminators
Sampling Circuits
Zero-Crossing Detectors
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.
Note: All devices are specified over the -40°C to +85°C operat-
ing temperature range.
MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
2 _______________________________________________________________________________________
Power-Supply Ranges
Supply Voltage (VCC to GND)..............................................6V
Differential Input Voltage........................-0.3V to (VCC + 0.3V)
Common-Mode Input Voltage to GND ...-0.3V to (VCC + 0.3V)
Latch-Enable Input Voltage
(MAX9109 only)...................................-0.3V to (VCC + 0.3V)
Current into Input Pins ......................................................±20mA
Output Short-Circuit Duration to VCC or GND ........................10s
Continuous Power Dissipation (TA= +70°C)
6-Pin SC70 (derate 3.1mW/°C above +70°C)..............245mW
6-Pin SOT23 (derate 8.7mW/°C above +70°C)696mW 8-Pin
SOT23 (derate 9.1mW/°C above +70°C).........................727mW
8-Pin SO (derate 5.9mW/°C above +70°C)..................470mW
14-Pin TSSOP (derate 9.1mW/°C above +70°C) .........727mW
14-Pin SO (derate 8.33mW/°C above +70°C)..............666mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(VCC = +5V, VCM = 0, VLE = 0 (MAX9109 only), TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
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.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Operating Voltage Range
Input Bias Current
Input Offset Current
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Output High Voltage
Output Low Voltage
Output Rise Time
Output Fall Time tf
tr
VOL
VOH
PSRR
CMRR
IOS
IB
VCC
SYMBOL
VOUT = 2.4V to 0.4V, CL= 10pF
VOUT = 0.4V to 2.4V, CL= 10pF
ISINK = 8mA
ISINK = 3.2mA
ISOURCE = 100µA
4.5V ≤VCC ≤5.5V
VCC = 5.5V (Note 5)
TA= +25°C
Guaranteed by PSRR
CONDITIONS MIN TYP MAX
4.5 5.5
0.5 1.6
125 350
25 80
50 1000
50 1000
3.0 3.5
0.35 0.6
0.4
12
6ns
ns
V
V
µV/V
µV/V
nA
nA
V
UNITS
Input Hysteresis VHYST (Note 3) 2mV
Input Voltage Range VCMR (Note 4) -0.2 VCC - 1.5 V
mASupply Current Per Comparator VCC = +5.5V, all outputs low
ICC 0.35 0.7
Input Offset Voltage VOS TA= TMIN to TMAX 4.0 mV
(Note 2)
MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +5V, VCM = 0, VLE = 0 (MAX9109 only), TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
Latch Hold Time
Latch Setup Time
Latch Input Current
Latch Input Voltage Low
Latch Input Voltage High
Propagation Delay Skew
Differential Propagation Delay
Propagation Delay
PARAMETER SYMBOL
tPD+, tPD-
∆tPD
tPDskew
VIH
VIL
IIH, IIL
ts
th(Note 8)
(Note 8)
(Note 8)
(Note 8)
(Note 8)
VIN = 100mV, VOD = 10mV
(Note 7)
VIN = 100mV, VOD = 10mV
(Note 6)
VIN = 100mV, VOD = 10mV
CONDITIONS MIN TYP MAX
25
1
5
2.0
0.8
0.4 1
2
2ns
ns
µA
V
V
ns
ns
ns
UNITS
Note 1: Devices are 100% production tested at TA= +25°C. All temperature limits are guaranteed by design.
Note 2: Input Offset Voltage is defined as the center of the input-referred hysteresis zone. Specified for VCM = 0. See Figure 1.
Note 3: Trip Point is defined as the input voltage required to make the comparator output change state. The difference
between upper (VTRIP+) and lower (VTRIP-) trip points is equal to the width of the input-referred hysteresis zone (VHYST).
Specified for an input common-mode voltage (VCM) of 0. See Figure 1.
Note 4: 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 VCMR 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 5: Tested over the full-input voltage range (VCMR).
Note 6: Differential Propagation Delay is specified as the difference between any two channels in the MAX9107/MAX9108 (both
outputs making either a low-to-high or a high-to-low transition).
Note 7: Propagation Delay Skew is specified as the difference between any single channel’s output low-to-high transition (tPD+)
and high-to-low transition (tPD-).
Note 8: Latch specifications apply to MAX9109 only. See Figure 2.
MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
4________________________________________________________________________________________________
-0.5
-0.2
-0.3
-0.4
-0.1
0
0.1
0.2
0.3
0.4
0.5
-50 0-25 255075100
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
MAX9107/08/09 toc04
TEMPERATURE (°C)
INPUT OFFSET VOLTAGE (mV)
0.5
0.4
0.3
0.2
0.1
0624 81012
OUTPUT LOW VOLTAGE
vs. SINK CURRENT
MAX9107/08/09 toc07
ISINK (mA)
VOL (V)
TA = -55°C
TA = +25°C
TA = +125°C
-400
-300
-350
-250
-200
-150
-100
-50
0
50
100
150
200
INPUT BIAS CURRENT
vs. TEMPERATURE
MAX9107/08/09 toc05
TEMPERATURE (°C)
INPUT CURRENT (nA)
-50 0 25-25 50 75 100
-2
-1
1
0
2
-60 -20 0 20 40-40 60 80 100 120 140
TRIP POINT
vs. TEMPERATURE
MAX9107/08/09 toc06
TEMPERATURE (°C)
VOS (mV)
VCM = 0
VTRIP+
VTRIP-
5.0
2.0
1 100 1000
OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT
3.0
4.0
MAX9107/08/09 toc08
ISOURCE (µA)
VOH (V)
10
TA = +125°C
TA = +25°C
TA = -55°C
4.5
3.5
2.5
10
15
20
25
30
35
10 100
PROPAGATION DELAY
vs. INPUT OVERDRIVE
MAX9107/08/09 toc09
INPUT OVERDRIVE (mV)
PROPAGATION DELAY (ns)
RS = 10Ω
CLOAD = 15pF
tPD+
tPD-
0
0.2
0.1
0.4
0.3
0.5
0.6
4.0 5.04.5 5.5 6.0
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
(OUTPUTS AT VOL)
MAX9107/08/09 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
TA = +125°C
TA = +25°C
TA = -55°C
0
0.1
0.3
0.2
0.4
0.5
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
(OUTPUTS AT VOH)
MAX9107/08/09 toc02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
4.0 5.04.5 5.5 6.0
TA = +125°C
TA = +25°C
TA = -55°C
-1
2
1
0
3
4
5
-60 200-40 -20 40 60 80 100 120 140
INPUT VOLTAGE RANGE
vs. TEMPERATURE
MAX9107/08/09 toc03
TEMPERATURE (°C)
INPUT VOLTAGE RANGE (V)
VCMR+
VCMR-
__________________________________________Typical Operating Characteristics
(VCC = 5V, VCM = 0, CL= 15pF, TA= +25°C, unless otherwise noted.)
MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
_________________________________________________________________________________________________ 5
5ns/div
PROPAGATION DELAY (tPD-)
OVERDRIVE
10mV
OUTPUT
1V/div
MAX9107/08/09 toc11
INPUT
50mV/div
10ns/div
PROPAGATION DELAY (tPD+)
INPUT
50mV/div
OVERDRIVE
10mV
OUTPUT
1V/div
MAX9107/08/09 toc10
40
35
30
25
20
04020 60 80 100
PROPAGATION DELAY
vs. CAPACITIVE LOAD
MAX9107/08/09 toc13
CAPACITIVE LOAD (pF)
PROPAGATION DELAY (ns)
VOD = 10mV
RS = 10Ω
tPD+
tPD-
10
20
30
40
-60 200-40 -20 40 60 80 100 120 140
PROPAGATION DELAY
vs. TEMPERATURE
MAX9107/08/09 toc14
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
VOD = 10mV
RS = 10Ω
CLOAD = 15pF
tPD+
tPD-
0
10 10k1k100
PROPAGATION DELAY
vs. SOURCE IMPEDANCE
100
40
20
80
60
MAX9107/08/09 toc15
SOURCE IMPEDANCE (Ω)
PROPAGATION DELAY (ns)
VOD = 5mV
CLOAD = 15pF
tPD+
____________________________Typical Operating Characteristics (continued)
(VCC = 5V, VCM = 0, CL= 15pF, TA= +25°C, unless otherwise noted.)
MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
6 _______________________________________________________________________________________
_______________Detailed Description
Timing
Noise or undesired parasitic AC feedback cause most
high-speed comparators to oscillate in the linear region
(i.e., when the voltage on one input is at or near the
voltage on the other input). The MAX9107/MAX9108/
MAX9109 eliminate this problem by incorporating an
internal hysteresis of 2mV. When the two comparator
input voltages are equal, hysteresis effectively causes
one comparator input voltage to move quickly past the
other, thus taking the input out of the region where
oscillation occurs. Standard comparators require that
hysteresis be added through the use of external resis-
tors. The MAX9107/MAX9108/MAX9109’s fixed internal
hysteresis eliminates these resistors. To increase hys-
teresis and noise margin even more, add positive feed-
back with two resistors as a voltage divider from the
output to the noninverting input.
Adding hysteresis to a comparator creates two trip
points: one for the input voltage rising and one for the
input voltage falling (Figure 1). The difference between
these two input-referred trip points is the hysteresis.
The average of the trip points is the offset voltage.
Figure 1 illustrates the case where IN- is fixed and IN+
is varied. If the inputs were reversed, the figure would
look the same, except the output would be inverted.
The MAX9109 includes an internal latch, allowing the
result of a comparison to be stored. If LE is low, the
latch is transparent (i.e., the comparator operates as
though the latch is not present). The state of the com-
parator output is latched when LE is high (Figure 2).
______________________________________________________________Pin Description
PIN
MAX9109
MAX9107
MAX9108
SC70/SOT23
SO
NAME FUNCTION
1 1 — — OUTA Channel A Output
2 2 — — INA- Channel A Inverting Input
3 3 — — INA+ Channel A Noninverting Input
7 7 — — OUTB Channel B Output
6 6 — — INB- Channel B Inverting Input
5 5 — — INB+ Channel B Noninverting Input
— 8 — — OUTC Channel C Output
— 9 — — INC- Channel C Inverting Input
— 10 — — INC+ Channel C Noninverting Input
— 14 — — OUTD Channel D Output
— 13 — — IND- Channel D Inverting Input
— 12 — — IND+ Channel D Noninverting Input
— — 1 7 OUT Output
— — 3 2 IN+ Noninverting Input
— — 4 3 IN- Inverting Input
8461V
CC Positive Supply
4 11 2 6 GND Ground
— — 5 5 LE Latch E nab l e. The l atch i s tr ansp ar ent w hen LE i s l ow .
— — — 4, 8 N.C. No Connection. Not internally connected.
MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
_______________________________________________________________________________________ 7
VTRIP+
VHYST
VTRIP-
VIN+
COMPARATOR
OUTPUT
VOH
VOL
VTRIP+ + VTRIP-
2
VOS =
VIN- = 0
Figure 1. Input and Output Waveforms, Noninverting Input
Varied
Applications Information
Circuit Layout
Because of the MAX9107/MAX9108/MAX9109’s high
gain bandwidth, special precautions must be taken to
realize the full high-speed capability. A printed circuit
board with a good, low-inductance ground plane is
mandatory. Place the decoupling capacitor (a 0.1µF
ceramic capacitor is a good choice) as close to VCC as
possible. Pay close attention to the decoupling capaci-
tor’s bandwidth, keeping leads short. Short lead
lengths on the inputs and outputs are also essential to
avoid unwanted parasitic feedback around the com-
parators. Solder the device directly to the printed circuit
board instead of using a socket.
Overdriving the Inputs
The inputs to the MAX9107/MAX9108/MAX9109 may be
driven beyond the voltage limits given in the Absolute
Maximum Ratings, as long as the current flowing into the
device is limited to 25mA. However, if the inputs are over-
driven, the output may be inverted. The addition of an
external diode prevents this inversion by limiting the input
voltage to 200mV to 300mV below ground (see Figure 3).
Battery-Operated Infrared Data Link
In Figure 4, the circuit allows reception of infrared data.
The MAX4400 converts the photodiode current to a
voltage, and the MAX9109 determines whether the
amplifier output is high enough to be called a “1.” The
current consumption of this circuit is minimal: the
MAX4400 and MAX9109 require typically 410µA and
350µA, respectively.
tPD+
VIN
VOD
th
ts
3V
1.4V
0
VOS
VOH
1.4V
VOL
COMPARE
LATCH
LE
DIFFERENTIAL
INPUT
VOLTAGE
OUTPUT
Figure 2. MAX9109 Timing Diagram
10pF
1MΩ
+5V
4
5
+5V
0.1µF
DATA
4
3
100kΩ
SIEMENS BP-104
PHOTODIODE
100kΩ
+5V
1000pF
1000pF
47kΩ
3
1
0.1µF
2
6
1
MAX9109
MAX4400
2
5
Figure 4. Battery-Operated Infrared Data Link Consumes Only
760µA
VCLAMP = -200mV TO -300mV
ISRC
V-
1/2 MAX9107
Figure 3. Schottky Clamp for Input Driven Below Ground
MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
8 _______________________________________________________________________________________
SOT23, 8L .EPS
Chip Information
MAX9107 TRANSISTOR COUNT: 262
MAX9108 TRANSISTOR COUNT: 536
MAX9109 TRANSISTOR COUNT: 140
PROCESS: Bipolar
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
_______________________________________________________________________________________ 9
TSSOP4.40mm.EPS
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
10 ______________________________________________________________________________________
SC70, 6L.EPS
PACKAGE OUTLINE, 6L SC70
21-0077
1
1
E
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
______________________________________________________________________________________ 11
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
6LSOT.EPS
MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
12 ______________________________________________________________________________________
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13
© 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
SOICN .EPS
PACKAGE OUTLINE, .150" SOIC
1
1
21-0041 B
REV.DOCUMENT CONTROL NO.APPROVAL
PROPRIETARY INFORMATION
TITLE:
TOP VIEW
FRONT VIEW
MAX
0.010
0.069
0.019
0.157
0.010
INCHES
0.150
0.007
E
C
DIM
0.014
0.004
B
A1
MIN
0.053A
0.19
3.80 4.00
0.25
MILLIMETERS
0.10
0.35
1.35
MIN
0.49
0.25
MAX
1.75
0.050
0.016L0.40 1.27
0.3940.386D
D
MINDIM
D
INCHES
MAX
9.80 10.00
MILLIMETERS
MIN MAX
16 AC
0.337 0.344 AB8.758.55 14
0.189 0.197 AA5.004.80 8
N MS012
N
SIDE VIEW
H 0.2440.228 5.80 6.20
e 0.050 BSC 1.27 BSC
C
HE
eBA1
A
D
0∞-8∞
L
1
VARIATIONS:
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
Revision History
Pages revised at Rev 2: 1, 2, 9–13