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.
General Description
The MAX4641/MAX4642/MAX4643 are monolithic, dual,
single-pole/single-throw (SPST) switches that can operate
from a single supply ranging from +1.8V to +5.5V. The
MAX4641/MAX4642/MAX4643 provide low 4Ωon-resis-
tance (RON), 0.6ΩRON matching between channels, and
1ΩRON flatness over the entire analog signal range.
These devices offer fast switching times of less than 20ns
while consuming less than 0.01µW of quiescent power.
The MAX4641 has two normally open (NO) switches,
and the MAX4642 has two normally closed (NC)
switches. The MAX4643 has one NO switch and one NC
switch. All three devices have low 0.35nA leakage cur-
rents over the entire temperature range. The MAX4641/
MAX4642/MAX4643 are available in small 8-pin µMAX
and 8-pin QFN packages.
Applications
Battery-Operated Equipment
Audio and Video Signal Routing
Low-Voltage Data-Acquisition Systems
Sample-and-Hold Circuits
Communications Circuits
Features
♦+1.8V to +5.5V Single-Supply Operation
♦Rail-to-Rail™ Analog Signal Range
♦Guaranteed RON
4Ωmax (+5V supply)
8Ωmax (+3V supply)
♦+1.8V Operation
RON 30Ωtyp Over Temperature
tON 18ns typ, tOFF 12ns typ
♦Guaranteed RON Flatness: 1Ω(+5V supply)
♦Guaranteed RON Match Between Channels
0.6Ω(+5V supply)
♦Low Leakage (<0.35nA) Over Entire Temperature
Range
♦Excellent AC Characteristics
Low Crosstalk: -97dB at 1MHz
High Off-Isolation: -80dB at 1MHz
0.018% Total Harmonic Distortion
♦Low Power Consumption: < 0.01µW
MAX4641/MAX4642/MAX4643
High-Speed, Low-Voltage, 4Ω, Dual SPST
CMOS Analog Switches
________________________________________________________________ Maxim Integrated Products 1
MAX4641
IN_
0
1
NO_
MAX4641
OFF
ON
COM2
IN2
NO2
GND
1
2
8
7
V+
IN1
COM1
NO1
TOP VIEW
3
4
6
5
MAX4642
IN_
0
1
NC_
MAX4642
ON
OFF
COM2
IN2
NC2
GND
1
2
8
7
V+
IN1
COM1
NC1
3
4
6
5
MAX4643
IN_
0
1
NO1
MAX4643
OFF
ON
NC2
ON
OFF
COM2
IN2
NC2
GND
1
2
8
7
V+
IN1
COM1
NO1
3
4
6
5
µMAX
µMAX
µMAX
Pin Configurations/Functional Diagrams/Truth Tables
19-1656; Rev 1; 2/02
Ordering Information
8 µMAX
PIN-PACKAGETEMP RANGE
-40°C to +85°C
MAX4643EUA
PART
8 µMAX-40°C to +85°C
MAX4642EUA
8 µMAX-40°C to +85°C
MAX4641EUA
Rail-to-Rail is a trademark of Nippon Motorola, Ltd.
8 QFN 3 x 3-40°C to +85°CMAX4641EGA
8 QFN 3 x 3-40°C to +85°CMAX4642EGA
8 QFN 3 x 3-40°C to +85°CMAX4643EGA
Pin Configurations continued at end of data sheet.
MAX4641/MAX4642/MAX4643
High-Speed, Low-Voltage, 4Ω, Dual SPST
CMOS Analog Switches
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—Single +5V Supply
(V+ = +4.5V to +5.5V, VINH = 2.4V, VINL = 0.8V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°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.
(All Voltages Referenced to GND)
V+ .............................................................................-0.3V to +6V
IN_, COM_, NO_, NC_ (Note 1)....................-0.3V to (V+ + 0.3V)
Continuous Current (any terminal)....................................±20mA
Continuous Current (NO_, NC_, COM_)...........................±50mA
Peak Current (NO_, NC_, COM_, pulsed at 1ms,
10% duty cycle)........................................................ ±100mA
Continuous Power Dissipation (TA= +70°C)
8-Pin µMAX (derate 4.5mW/°C above +70°C) ........... 362mW
8-Pin QFN (derate 24.4mW/°C above +70°C) ......... 1951mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°C
V+ = 4.5V,
ICOM_ = 10mA, VNO_
or VNC_= 0 to V+
VIN_ = 0.8V or 2.4V
V+ = 5.5V, VCOM_ =
1V or 4.5V
V+ = 4.5V, ICOM_ =
10mA, VNO_ or
VNC_ = 0 to V+
V+ = 4.5V, ICOM_ =
10mA, VNO_ or
VNC_ = 0 to V+
CONDITIONS
µA-0.1 0.005 0.1IIN
IN_ Input Current
V0.8VIL
IN_ Input Logic Low
V2.4VIH
IN_ Input Logic High
Ω
2.5 4
RON
On-Resistance
V0V+
VCOM_,
VNO_,
VNC_
Analog Signal Range
DIGITAL INPUTS
-0.35 0.35
ICOM_(ON) nA
-0.25 0.01 0.25
COM_ On-Leakage Current
(Notes 4, 5)
1.5
5
Ω
0.2 0.6
∆RON
On-Resistance Match
Between Channels
(Notes 2, 8) 0.8
Ω
0.85 1
RFLAT
On-Resistance Flatness
(Note 3)
UNITSMIN TYP MAXSYMBOLPARAMETER
Note 1: Signals on NO_, NC_, COM_, or IN_ exceeding V+ or GND are clamped by internal diodes. Limit forward-diode current to
maximum current rating.
TA= +25°C
TA= TMIN to TMAX
TA= +25°C
TA= TMIN to TMAX
TA= +25°C
TA= TMIN to TMAX
TA= +25°C
V+ = 5.5V, VCOM_ =
1V or 4.5V, VNO_ or
VNC_ = 4.5V or 1V -0.35 0.35TA= TMIN to TMAX
nA
-0.25 0.01 0.25
INO_(OFF),
INC_(OFF)
NO_, NC_ Off-Leakage
Current (Note 4)
TA= +25°C
V+ = 5.5V, VCOM_ =
1V or 4.5V, VNO_ or
VNC_ = 4.5V or 1V -0.35 0.35TA= TMIN to TMAX
nA
-0.25 0.01 0.25
ICOM_(OFF)
COM_ Off-Leakage Current
(Note 4)
TA= +25°C
TA= TMIN to TMAX
ANALOG SWITCH
DIGITAL INPUTS
MAX4641/MAX4642/MAX4643
High-Speed, Low-Voltage, 4Ω, Dual SPST
CMOS Analog Switches
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)
(V+ = +4.5V to +5.5V, VINH = 2.4V, VINL = 0.8V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
ELECTRICAL CHARACTERISTICS—Single +3V Supply
(V+ = +2.7V to +3.3V, VINH = 2.0V, VINL = 0.4V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
V+ = 2.7V, ICOM_ =
10mA, VNO_ or
VNC_ = 0 to V+
TA= +25°C
V+ = 2.7V, ICOM_ =
10mA, VNO_ or
VNC_ = 0 to V+
CONDITIONS
Ω
68
RON
On-Resistance
V0V+
VCOM_,
VNO_,
VNC_
Analog Signal Range
TA= TMIN to TMAX
9
TA= +25°C
TA= TMIN to TMAX
Ω
0.2 0.6
∆RON
On-Resistance Match
Between Channels
(Notes 2, 8) 0.8
UNITSMIN TYP MAXSYMBOLPARAMETER
TA= +25°C
V+ = 2.7V, ICOM_ =
10mA, VNO_ or
VNC_ = 0 to V+ TA= TMIN to TMAX
Ω
1.5 3.0
RFLAT
On-Resistance Flatness
(Note 3) 3.5
ANALOG SWITCH
%0.018RL= 600Ω, 0.5Vp-p, f = 20Hz to 20kHzTHDTotal Harmonic Distortion
µA0.001 1.0V+ = 5.5V, VIN_ = 0 or V+I+Positive Supply Current
-77
-56
Crosstalk (Note 7) VCT -97 dB
f = 10MHz
f = 1MHz
CL= 5pF, RL= 50Ω,
Figure 3
f = 10MHz
f = 1MHz
PARAMETER SYMBOL MIN TYP MAX UNITS
Break-Before-Make (Note 4)
(MAX4643 only) tBBM
7
ns
TA= TMIN to TMAX
10
Turn-Off Time (Note 4) tOFF
58
ns
TA= TMIN to TMAX
TA= +25°C
18
TA= TMIN to TMAX
1
Turn-On Time (Note 4) tON
915
ns
Charge Injection Q 2 pC
NO_, NC_ Off-Capacitance CNO_ (OFF),
CNC_ (OFF) 7pF
COM_ Off-Capacitance CCOM_ (OFF) 7pF
Switch On-Capacitance C(ON) 18 pF
Off-Isolation (Note 6) VISO -80 dB
CONDITIONS
VGEN = 0, RGEN = 0, CL= 1nF, Figure 4
RL= 300Ω,
CL= 35pF, VNO_ =
VNC_ = 3V, Figure 2
NO_ or NC_ = GND, f = 1MHz, Figure 5
TA= +25°C
RL= 300Ω, CL=
35pF, VNO_ = VNC_ =
3V, Figure 2
TA= +25°C
f = 1MHz, Figure 5
f = 1MHz, Figure 5
CL= 5pF, RL= 50Ω,
Figure 3
RL= 300Ω, CL=
35pF, VNO_ = VNC_ =
3V, Figure 2
DYNAMIC
SUPPLY
MAX4641/MAX4642/MAX4643
High-Speed, Low-Voltage, 4Ω, Dual SPST
CMOS Analog Switches
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued)
(V+ = +2.7V to +3.3V, VINH = 2.0V, VINL = 0.4V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
Note 2: ∆RON = RON(MAX) - RON(MIN).
Note 3: RON Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal range.
Note 4: Guaranteed by design.
Note 5: On-Leakage performed with voltage applied to COM_, with NO_ and NC_ left floating.
Note 6: Off-Isolation = 20log10 (VO_ / VI_), where VOis VCOM_ and VIis VNC_ or VNO_ from the network analyzer.
Note 7: Crosstalk is measured between the two switches.
Note 8: RON and ∆RON matching specifications for QFN-packaged parts are guaranteed by design.
f =1MHz, Figure 5
NO_ or NC_ = GND, f = 1MHz, Figure 5
CL= 5pF, RL= 50Ω,
Figure 3
VGEN = 0, RGEN = 0, CL= 1nF, Figure 4
VIN_ = 0.4V or 2.0V
RL= 300Ω, CL=
35pF, VNO_ =
VNC_ = 2V, Figure 2
CL= 5pF, RL= 50Ω,
Figure 3
RL= 300Ω, CL=
35pF, VNO_ =
VNC_ = 2V, Figure 2
CONDITIONS
dB
-77
-80
VISO
Off-Isolation (Note 6) dB
-56
V0.4VIL
IN_ Input Logic Low
V2.0VIH
IN_ Input Logic High
pF7CCOM_(OFF)
COM_ Off-Capacitance
pF7
CNO_(OFF),
CNC_(OFF)
NO_, NC_ Off-Capacitance
pC2QCharge Injection
µA-0.1 0.005 0.1IIN
IN_ Input Current
ns
22
tON
Turn-On Time (Note 4)
ns
7
tBBM
UNITSMIN TYP MAXSYMBOLPARAMETER
14 20
TA= TMIN to TMAX
TA= +25°C
RL= 300Ω, CL=
35pF, VNO_ =
VNC_ = 2V, Figure 2
ns
11
tOFF
Turn-Off Time (Note 4)
610
TA= TMIN to TMAX
TA= +25°C
Break-Before-Make (Note 4)
(MAX4643 only)
TA= +25°C
TA= TMIN to TMAX 1
f =1MHz, Figure 5 pF18C(ON)
Switch On-Capacitance
-97
VCT
Crosstalk (Note 7)
f = 10MHz
f = 1MHz
f = 10MHz
f = 1MHz
V+ = 3.3V, VIN_ = 0 or V+ µA0.001 1.0I+Positive Supply Current
DIGITAL INPUTS
DYNAMIC
SUPPLY
MAX4641/MAX4642/MAX4643
High-Speed, Low-Voltage, 4Ω, Dual SPST
CMOS Analog Switches
_______________________________________________________________________________________ 5
0
15
45
30
60
75
CHARGE INJECTION vs. VCOM
TOC4641/2/3toc04
VCOM (V)
CHARGE INJECTION (pC)
034215
V+ = 5V
20
15
10
5
0
021 345
ON-RESISTANCE vs. VCOM
MAX4641/2/3toc01
VCOM (V)
RON (Ω)
V+ = 3.0V
V+ = 2.5V
V+ = 5V
ICOM = 10mA
V+ = 1.8V
RON (Ω)
5
4
3
2
1
-40 10-15 35 60 85
ON-RESISTANCE vs. TEMPERATURE
MAX4641/2/3toc02
TEMPERATURE (°C)
V+ = 3V
V+ = 5V
ICOM = 10mA
1
-40 8535 60-15 10
ON-/OFF-LEAKAGE CURRENT
vs. TEMPERATURE
1000
10
100
MAX4641/2/3toc03
TEMPERATURE (°C)
LEAKAGE (pA)
IN = GND
IN = V+
0
40
20
80
60
120
100
140
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4641/2/3toc05
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (nA)
1.8 2.8 3.8 4.8 5.8
IN = GND
IN = V+
2.0
1.5
1.0
0.5
0
1.8 3.42.6 4.2 5.0 5.8
LOGIC THRESHOLD
vs. SUPPLY VOLTAGE
MAX4641/2/3toc06
SUPPLY VOLTAGE (V)
LOGIC THRESHOLD (V)
0
3
9
6
12
15
SWITCHING TIMES vs. SUPPLY VOLTAGE
TOC4641/2/3toc07
SUPPLY VOLTAGE (V)
SWITCHING TIMES (ns)
2435
0
2
6
4
8
10
SWITCHING TIMES vs. TEMPERATURE
TOC4641/2/3toc08
TEMPERATURE (°C)
SWITCHING TIMES (ns)
-40 35 6010-15 85
300
250
200
150
100
50
0
-40 10-15 35 60 85
SUPPLY CURRENT
vs. TEMPERATURE
TOC4641/2/3toc09
TEMPERATURE (°C)
SUPPLY CURRENT (nA)
IN = GND
V+ = 5V
V+ = 3V
V+ = 1.8V
Typical Operating Characteristics
(V+ = +5V or +3V, VINH = V+, VINL = GND, TA= +25°C, unless otherwise noted.)
MAX4641/MAX4642/MAX4643
High-Speed, Low-Voltage, 4Ω, Dual SPST
CMOS Analog Switches
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V+ = +5V or +3V, VINH = V+, VINL = GND, TA= +25°C, unless otherwise noted.)
NAME FUNCTION
MAX4641
1, 5 NO1, NO2 Analog Switch Normally Open Terminals
–NC1, NC2 Analog Switch Normally Closed Terminals
–NO1 Analog Switch Normally Open Terminal
4GND Ground
3, 7 IN2, IN1 Logic-Controlled Inputs
2, 6 COM1, COM2 Analog Switch Common Terminals
–NC2 Analog Switch Normally Closed Terminal
8V+ Positive Supply Input. Bypass with a 0.1µF capacitor to GND.
Pin Description
0
0.01 0.1 1 10 100 1000
-10
-40
-50
-30
-20
-60
-70
-80
-90
-100
FREQUENCY RESPONSE
MAX4641/2/3toc10
FREQUENCY (MHz)
(dB/div)
OFF-ISOLATION
ON-LOSS
V+ = 5V
0
0.01 1 100.1 100
MAX4641/2/3toc11
FREQUENCY (MHz)
CROSSTALK (dB)
-100
-80
-60
-40
-20
CROSSTALK vs. FREQUENCY
0.05
0.01 1 100.1 100
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4641/2/3toc12
FREQUENCY (kHz)
THD (%)
0
0.01
0.02
0.03
0.04
V+ = 5V
MAX4643
–
PIN
–
1
4
3, 7
2, 6
5
8
MAX4642
–
1, 5
–
4
3, 7
2, 6
–
8
Note: NO_, NC_, and COM_ pins are identical and interchangeable. Signals can be passed through either side of these bidirectional
switches. However, the typical off-capacitances differ, as shown in the Electrical Characteristics.
MAX4641/MAX4642/MAX4643
High-Speed, Low-Voltage, 4Ω, Dual SPST
CMOS Analog Switches
_______________________________________________________________________________________ 7
Applications Information
The MAX4641/MAX4642/MAX4643 operate from a sin-
gle supply ranging from +1.8V to +5.5V. The devices
are guaranteed to be functional over that supply range,
but TTL/CMOS compatibility is only valid for operation
using a +5V supply. All voltage levels are referenced to
GND. Positive and negative DC analog inputs or AC
signals can be accommodated by shifting V+ and
GND.
ESD-protection diodes are internally connected be-
tween each analog-signal pin and both V+ and GND.
One of these diodes conducts if any analog signal
exceeds V+ or GND (Figure 1). Virtually all of the ana-
log leakage current comes from the ESD diodes to V+
or GND. Although the ESD diodes on a given signal pin
are identical, and therefore fairly well balanced, they
are reverse biased differently. Each is biased by either
V+ or GND and the analog signal. This means their
leakages will vary as the signal varies. The difference in
the two diode leakages to the V+ and GND pins consti-
tutes the analog-signal-path leakage current. All analog
leakage current flows between each pin and one of the
supply terminals, not to the other switch terminal. This
is why both sides of a given switch can show leakage
currents of the same or opposite polarity.
There is no normal current path between the analog-
signal paths and V+ or GND. V+ and GND also power
the internal logic and logic-level translators. The logic-
level translators convert the logic level into switched V+
and GND signals to drive the analog signal gates.
V+
NO_, NC_
GND
COM
Figure 1. Overvoltage Protection Using External Blocking
Diodes
MAX4641
IN_
0
1
NO_
MAX4641
OFF
ON
COM2
IN2
NO2
GND
1
2
8
7
V+
IN1
COM1
NO1
TOP VIEW
3
4
6
5
MAX4642
IN_
0
1
NC_
MAX4642
ON
OFF
COM2
IN2
NC2
GND
1
2
8
7
V+
IN1
COM1
NC1
3
4
6
5
MAX4643
IN_
0
1
NO1
MAX4643
OFF
ON
NC2
ON
OFF
COM2
IN2
NC2
GND
1
2
8
7
V+
IN1
COM1
NO1
3
4
6
5
QFN
QFN
QFN
Pin Configurations/Functional Diagrams/Truth Tables (continued)
MAX4641/MAX4642/MAX4643
High-Speed, Low-Voltage, 4Ω, Dual SPST
CMOS Analog Switches
8 _______________________________________________________________________________________
V+
VCOM_
GND
V+
IN_
NO_
COM_
VNO_
50Ω300Ω
MAX4641
35pF
NO_OPEN
V+
VCOM_
GND
V+
IN_
NC_
COM_
VNC_
MAX4642
35pF
NC_OPEN
V+
VCOM_
GND
V+
IN_
NO_
COM_
VS
50Ω300Ω
MAX4643
35pF
NC_VS
VIH + 0.5V
0
0
IN_ 50% 50%
90%90%
VNO_
VCOM_
tOFF
tON
VIH + 0.5V
0
IN_
VCOM_
50% 50%
90%90%
tOFF tON
VNC_
0
VIH + 0.5V
0
VS
0
IN_
VCOM_
90%
90%
tBBM
tBBM
tBBM = tON(NO_) - tOFF(NC_)
OR
tBBM = tON(NC_) - tOFF(NO_)
50Ω300Ω
tR < 5ns
tF < 5ns
Figure 2. Switching Times
MAX4641/MAX4642/MAX4643
High-Speed, Low-Voltage, 4Ω, Dual SPST
CMOS Analog Switches
_______________________________________________________________________________________ 9
Figure 5. NO_, NC_, and COM_ Capacitance
MEASUREMENTS ARE STANDARDIZED AGAINST
SHORT AT SOCKET TERMINALS. OFF-ISOLATION IS
MEASURED BETWEEN COM AND “OFF” TERMINAL
ON EACH SWITCH. ON-LOSS IS MEASURED BETWEEN
COM AND “ON” TERMINAL ON EACH SWITCH. SIGNAL
DIRECTION THROUGH SWITCH IS REVERSED; WORST
VALUES ARE RECORDED.
V+
V+
VOUT
GND
V+
IN_
NO_
OR
NC_
COM_
VIN
MAX4641
MAX4642
MAX4643
OFF-ISOLATION = 20log VOUT
VIN
ON-LOSS = 20log VOUT
VIN
NETWORK
ANALYZER
50Ω
50Ω50Ω
50Ω
MEAS REF
0.1µF
*
* ADD 50Ω TERMINATION FOR
OFF-ISOLATION
Figure 3. Off-Isolation, On-Loss, and Crosstalk
∆VOUT
V+
0
VIN
VOUT
MAX4642MAX4641
∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
Q = ∆VOUT x CL
V+
VOUT
GND
V+
IN_
NO_
OR
NC_
COM_
VNO_ OR VNC_ = 0V
50Ω
MAX4641
MAX4642
MAX4643
CL
1000pF
VIN
V+
GND
V+
IN_
NO_
OR
NC_
COM_
MAX4641
MAX4642
MAX4643
1MHz
CAPACITANCE
ANALYZER
AS
REQUIRED
Figure 4. Charge Injection
Chip Information
TRANSISTOR COUNT: 105
MAX4641/MAX4642/MAX4643
High-Speed, Low-Voltage, 4Ω, Dual SPST
CMOS Analog Switches
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.
10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
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.
10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
Package Information
8LUMAXD.EPS
