19-2116; Rev 0; 7/01
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
General Description
The MAX4741/MAX4742/MAX4743 are low on-resis-
tance, low-voltage, dual single-pole/single-throw (SPST)
analog switches that operate from a single +1.6V to
+3.6V supply. These devices have fast switching
speeds (t
ON
= 24ns, t
OFF
= 16ns max), handle Rail-to-
Rail
®
analog signals, and consume less than 1µW of
quiescent power. The MAX4743 has break-before-
make switching.
When powered from a +3V supply, the MAX4741/
MAX4742/MAX4743 feature low 0.8Ω (max) on-resis-
tance (R
ON
), with 0.08Ω (max) R
ON
matching and
0.18Ω R
ON
flatness. The digital logic input is 1.8V
CMOS compatible when using a single +3V supply.
The MAX4741 has two normally open (NO) switches,
the MAX4742 has two normally closed (NC) switches,
and the MAX4743 has one NO switch and one NC
switch. The MAX4741/MAX4742/MAX4743 are available
in 8-pin SOT23 and 8-pin µMAX packages.
o
Low R
ON
:
0.8Ω max (+3V Supply)
2.5Ω max (+1.8V Supply)
o
0.18Ω max R
ON
Flatness (+3V Supply)
o
+1.6V to +3.6V Single-Supply Operation
o
Available in SOT23 and µMAX Packages
o
High-Current Handling Capacity (150mA
continuous)
o
1.8V CMOS Logic Compatible (+3V Supply)
o
Fast Switching: t
ON
= 24ns, t
OFF
= 16ns
Features
MAX4741/MAX4742/MAX4743
Ordering Information
PART
MAX4741EKA
MAX4741EUA
MAX4742EKA
MAX4742EUA
MAX4743EKA
MAX4743EUA
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
8 SOT23-8
8
µMAX
8 SOT23-8
8
µMAX
8 SOT23-8
8
µMAX
TOP
MARK
AAIY
—
AAIZ
—
AAJA
—
Applications
Power Routing
Battery Powered Systems
Audio and Video Signal Routing
Low-Voltage Data-Acquisition Systems
Communications Circuits
PCMCIA Cards
Cellular Phones
Modems
Hard Drives
Pin Configurations
TOP VIEW
MAX4741
MAX4742
NO1
COM1
IN2
GND
1
2
3
4
8
7
6
5
V+
IN1
COM2
NO2
NC1
COM1
IN2
GND
1
2
3
4
8
7
6
5
V+
IN1
COM2
NC2
NO1
COM1
IN2
GND
1
2
3
4
MAX4743
8
7
6
5
V+
IN1
COM2
NC2
µMAX
SOT23-8 Pin Configurations continued at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola, Inc.
µMAX
µMAX
________________________________________________________________
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.
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
MAX4741/MAX4742/MAX4743
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND
V+, IN_......................................................................-0.3V to +4V
COM_, NO_, NC_ (Note 1) ...........................-0.3V to (V+ + 0.3V)
Continuous Current COM_ , NO_, NC_ .........................±150mA
Peak Current COM_, NO_, NC_
(pulsed at 1ms 10% duty cycle)..................................±300mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SOT23 (derate 7.52mW/°C above +70°C)...........602mW
8-Pin µMAX (derate 4.5mW/°C above +70°C) ..............362mW
Operating Temperature Range ...........................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1:
Signals on COM_, NO_, or NC_ exceeding V+ or GND are clamped by internal diodes. Limit forward current to
maximum current rating.
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—Single +3V Supply
(V+ = +2.7V to +3.6V, V
IH
= +1.4V, V
IL
= +0.5V, T
A
= T
MIN
to T
MAX
, unless otherwise specified. Typical values are at V+ = +3.0V,
T
A
= +25°C.) (Notes 2, 3)
PARAMETER
ANALOG SWITCH
Analog Signal Range
V
COM
_,
V
NO
_,
V
NC
_
V+ = 2.7V,
I
COM
_ = 100mA,
V
NO
_ or V
NC
_ = 1.5V
V+ = 2.7V,
I
COM
_ = 100mA,
V
NO
_ or V
NC
_ = 1.5V
V+ = 2.7V,
I
COM
_ = 100mA,
V
NO
_ or V
NC
_ = 1V, 1.5V, 2V
V+ = 3.3V,
V
COM
_ = 0.3V, 3V,
V
NO
_ or V
NC
_ = 3V, 0.3V
V+ = 3.3V,
V
COM
_ = 0.3V, 3V
V
NO
_ or V
NC
_ = 3V, 0.3V or
floating
V+ = 3.3V,
V
COM
_ = 3V, 0.3V;
V
NO
_ or V
NC
_ = 3V, 0.3V or
floating
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
-1
-5
-1
-5
-2
-10
0.05
0.05
0
V+
V
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
0.5
0.8
Ω
0.9
0.08
Ω
0.09
0.18
Ω
0.20
1
nA
5
1
nA
5
2
nA
10
On-Resistance
R
ON
On-Resistance Match
Between Channels (Note 4)
∆R
ON
On-Resistance Flatness
(Note 5)
R
FLAT(ON)
NO_ or NC_ Off-Leakage
Current
I
NO_(OFF)
,
I
NC_(OFF)
COM_ Off-Leakage Current
I
COM_(OFF)
COM_ On-Leakage Current
I
COM_(ON)
2
_______________________________________________________________________________________
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued)
(V+ = +2.7V to +3.6V, V
IH
= +1.4V, V
IL
= +0.5V, T
A
= T
MIN
to T
MAX
, unless otherwise specified. Typical values are at V+ = +3.0V,
T
A
= +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
MAX4741/MAX4742/MAX4743
SWITCH DYNAMIC CHARACTERISTICS
V
NO
_, V
NC
_ = 1.5V,
R
L
= 50Ω, C
L
= 35pF,
Figure 1
V
NO
_, V
NC
_ = 1.5V,
R
L
= 50Ω, C
L
= 35pF,
Figure 1
V
NO
_, V
NC
_ = 1.5V,
R
L
= 50Ω, C
L
= 35pF,
Figure 1 (MAX4743)
V
GEN
= 0, R
GEN
= 0, C
L
=
1.0nF, Figure 3
f = 1MHz, Figure 4
f = 1MHz, Figure 4
f = 1MHz, Figure 4
Signal = 0, R
IN
= R
OUT
=
50Ω, C
L
= 5pF, Figure 2
f = 1MHz, V
COM
_ = 1V
RMS
, R
L
= 50Ω, C
L
= 5pF, Figure 2
f = 1MHz, V
COM
_ = 1V
RMS
, R
L
= 50Ω, C
L
= 5pF, Figure 2
THD
f = 20Hz to 20kHz, V
COM
_ =
2Vp-p, R
L
= 32Ω
+25°C
+25°C
+25°C
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
+25°C
+25°C
+25°C
+25°C
1
28
32
32
44
100
-55
-110
0.02
pC
pF
pF
pF
MHz
dB
dB
%
6
ns
12
18
24
ns
28
16
ns
18
Turn-On Time
t
ON
Turn-Off Time
t
OFF
Break-Before-Make (Note 6)
t
BBM
Charge Injection
NO_ or NC_ Off-
Capacitance
COM_ Off-Capacitance
COM_ On-Capacitance
-3dB On-Channel Bandwidth
Off-Isolation (Note 7)
Crosstalk (Note 8)
Total Harmonic Distortion
LOGIC INPUT
Input Logic High
Input Logic Low
Input Leakage Current
POWER SUPPLY
Power-Supply Range
Positive Supply Current
Q
C
OFF
C
COM_(OFF)
C
COM_(ON)
BW
V
ISO
V
IH
V
IL
I
IN
V+
I+
V+ = 3.6V, V
IN
_ = 0 or V+,
all channels on or off
+25°C
V
IN
_ = 0 or V+
1.4
0.5
-1
1.6
0.005
1
3.6
0.2
V
V
µA
V
µA
_______________________________________________________________________________________
3
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
MAX4741/MAX4742/MAX4743
ELECTRICAL CHARACTERISTICS—Single +1.8V Supply
(V+ = +1.8V, V
IH
= +1.0V, V
IL
= 0.4V, T
A
= T
MIN
to T
MAX
, unless otherwise specified. Typical values are at T
A
= +25°C.) (Notes 2, 3)
PARAMETER
ANALOG SWITCH
Analog Signal Range
V
COM
_,
V
NO
_,
V
NC
_
R
ON
I
NO_(OFF)
,
I
NC_(OFF)
I
COM
_ = 10mA,
V
NO
_ or V
NC
_ = 0.9V
V
COM
_ = 0.3V, 1.5V;
V
NO
_ or V
NC
_ = 1.5V,
0.3V
V
COM
_ = 0.3V, 1.5V;
V
NO
_ or V
NC
_ = 1.5V,
0.3V
V
COM
_ = 0.3V, 1.5V,
V
NO
_ or V
NC
_ = 0.3V,
1.5V, or floating
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
-1
-5
-1
-5
-2
-10
0
1.3
V+
2.5
5
1
nA
5
1
nA
5
2
nA
10
V
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
On-Resistance
NO_ or NC_ Off-Leakage
Current
Ω
COM_ Off-Leakage Current
I
COM_(OFF)
COM_ On-Leakage Current
I
COM_(ON)
SWITCH DYNAMIC CHARACTERISTICS
Turn-On Time
t
ON
V
NO
_, V
NC
_ = 1.5V,
RL = 50Ω, C
L
= 35pF,
Figure 1
V
NO
_, V
NC
_ = 1.5V,
R
L
= 50Ω, C
L
= 35pF,
Figure 1
V
NO
_, V
NC
_ = 1.5V,
R
L
= 50Ω, C
L
= 35pF,
Figure 1 (MAX4743)
V
GEN
= 0, R
GEN
= 0,
C
L
= 1nF, Figure 2
f = 1MHz, V
NO
_ = V
NC
_
= 1V
RMS
, R
L
= 50Ω,
C
L
= 5pF, Figure 2
f = 1MHz, V
COM
_ = 1V
RMS
,
R
L
= 50Ω,
C
L
= 5pF, Figure 2
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
+25°C
1
16
pC
10
ns
16
25
35
ns
40
25
ns
30
Turn-Off Time
t
OFF
Break-Before-Make (Note 6)
t
BBM
Charge Injection
Q
Off-Isolation (Note 7)
V
ISO
+25°C
-50
dB
Crosstalk (Note 8)
+25°C
-110
dB
4
_______________________________________________________________________________________
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
ELECTRICAL CHARACTERISTICS—Single +1.8V Supply (continued)
(V+ = +1.8V, V
IH
= +1.0V, V
IL
= 0.4V, T
A
= T
MIN
to T
MAX
, unless otherwise specified. Typical values are at T
A
= +25°C.) (Notes 2, 3)
PARAMETER
LOGIC INPUT
Input Logic High
Input Logic Low
Input Leakage Current
V
IH
V
IL
I
IN
V
IN
_ = 0 or V+
-1
1
0.4
1
V
V
µA
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
MAX4741/MAX4742/MAX4743
Note 2:
The algebraic convention, where the most negative value is a minimum and the most positive value is a maximum, is
used in this data sheet.
Note 3:
SOT23 packaged parts are 100% tested at +25°C. Limits across the full temperature range are guaranteed by design and
correlation. µMAX packaged parts -40°C specifications are guaranteed by design.
Note 4:
∆R
ON
= R
ON(MAX)
- R
ON(MIN)
.
Note 5:
Flatness is defined as the difference between the maximum and the minimum value of on-resistance as measured over the
specified analog signal ranges.
Note 6:
Guaranteed by design.
Note 7:
Off-Isolation = 20log
10
(V
COM
_/V
NO
_), V
COM
_ = output, V
NO
_ = input to off switch.
Note 8:
Between two switches.
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
ON-RESISTANCE vs. V
COM
AND TEMPERATURE
MAX4741 toc02
MAX4741 toc01
ON-RESISTANCE vs. V
COM
1.4
1.2
1.0
R
ON
(Ω)
0.8
0.6
0.4
0.2
0
0
0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6
V
COM
(V)
V+ = +1.8V
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
TURN-ON/OFF TIME
vs. SUPPLY VOLTAGE
40
36
t
ON
/t
OFF
(ns)
32
28
24
20
16
t
OFF
t
ON
MAX4741 toc03
44
I
COM
= 100mA
V+ = +2.0V
V+ = +2.5V
V+ = +2.7V
V+ = +3.0V
V+ = +3.3V
T
A
= +85°C
R
ON
(Ω)
T
A
= -40°C
T
A
= +25°C
V+ = +3.6V
V+ = +2.7V
I
COM
= 100mA
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7
V
COM
(V)
12
8
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
V+ (V)
_______________________________________________________________________________________
5
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