General Description
The MAX4647/MAX4648 are dual-supply single-pole/sin-
gle-throw (SPST) switches. On-resistance is 25Ωmax and
flat (2Ωmax) over the specified signal range. Each switch
can handle rail-to-rail analog signals. Off-leakage current
is only 1nA max at +25°C. They conduct analog or digital
signals equally well in either direction. The primary appli-
cation areas are in the switching and routing of signals in
telecommunications and test equipment.
The MAX4647/MAX4648 are single SPST analog switches.
The MAX4647 has one normally closed (NC) switch, and
the MAX4648 has one normally open (NO) switch. These
devices operate from a single +9V to +36V supply or from
dual ±4.5V to ±20V supplies. The MAX4647/MAX4648 are
available in tiny 6-pin SOT23 packages.
________________________Applications
PBX, PABX Systems
Communication Systems
DSL
Test Equipment
Avionics
Audio Systems
Redundant Systems
Relay Replacement
PC Multimedia Boards
____________________________Features
♦Low On-Resistance 25Ωmax (±15V Supplies)
♦Guaranteed RON Flatness Over Specified Signal
Range (2Ωmax)
♦VLLogic Supply Not Required
♦Rail-to-Rail Signal Handling
♦±15V and Single 12V Supply Operation
♦Low Leakage (1nA max)
♦Fast Switching Speeds
tON = 100ns
tOFF = 100ns
MAX4647/MAX4648
25ΩSPST Analog Switches in SOT23-6
________________________________________________________________ Maxim Integrated Products 1
V-
GNDIN
16COM
5V+
NC
MAX4647
SOT23-6
TOP VIEW
2
34
LOGIC SWITCH
0
1
ON
OFF
LOGIC SWITCH
0
1
OFF
ON
V-
GNDIN
16COM
5V+
NO
MAX4648
SOT23-6
2
34
Pin Configurations/Functional Diagrams/Truth Tables
19-1880; Rev 1; 1/07
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
PART TEMP
RANGE
PIN-
PACKAGE
TOP
MARK
PKG
CODE
MAX4647EUT-T+
-40°C to +85°C 6 SOT23 AARV
U 6S N - 1
MAX4648EUT-T+
-40°C to +85°C 6 SOT23 AARW
U 6S N - 1
Ordering Information
+Denotes a lead-free package.
MAX4647/MAX4648
25ΩSPST Analog Switches in SOT23-6
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—Dual ±15V Supplies
(V+ = +15V, V- = -15V, VIH = 2.4V, VIL = 0.8V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
(Notes 2, 3)
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.
(Voltages referenced to GND)
V+ ...........................................................................-0.3V, +44.0V
V- ............................................................................-44.0V, +0.3V
V+ to V-................................................................-0.3V to +44.0V
All Other Pins (Note 1)...............................V- - 0.3V to V+ + 0.3V
Continuous Current into Any Terminal..............................±60mA
Peak Current into Any Terminal
(pulsed at 1ms, 10% duty cycle)...............................±100mA
Continuous Power Dissipation (TA= +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C)...........696mW
Operating Temperature Ranges
MAX464_EUT..................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS TA
MIN
TYP
UNITS
ANALOG SWITCH
Analog Signal Range
VNO,VNC,
VCOM V- V+ V
+25°C1825
On-Resistance RON ICOM = 10mA; VNO
or VNC = ±10V TMIN to TMAX 30 Ω
+25°C 0.8 2
On-Resistance
Flatness (Note 4)
RFLAT
(
ON
)
ICOM = 10mA; VNO
or VNC = +5V, 0, -5V TMIN to TMAX 3Ω
+25°C-1
0.01
1
NO or NC Off-Leakage
Current
INO
(
OFF
)
or
INC
(
OFF
)
VNO or VNC = +14V, -14V;
VCOM = -14V, +14V TMIN to TMAX
-10
10 nA
+25°C-1
0.01
1
COM Off-Leakage
Current
ICOM
(
OFF
)
VCOM = -14V, +14V;
VNO or VNC = +14V, -14V TMIN to TMAX
-10
10 nA
+25°C-2 2
COM On-Leakage
Current
ICOM
(
ON
)
VCOM = +14V, -14V;
VNO or VNC = +14V, -14V or
floating TMIN to TMAX
-20
20 nA
LOGIC INPUT
Input Logic High VIH TMIN to TMAX
2.4
V
Input Logic Low VIL TMIN to TMAX 0.8 V
Input Leakage Current
IIN VIN = 0 or +5V TMIN to TMAX -1 1 µA
DYNAMIC CHARACTERISTICS
+25°C68
100
Turn-On Time tON VNO or VNC = ±10V; RL = 300Ω;
CL = 35pF; Figure 2 TMIN to TMAX
125
ns
+25°C62
100
Turn-Off Time tOFF VNO or VNC = ±10V; RL =300Ω;
CL = 35pF; Figure 2 TMIN to TMAX
125
ns
Charge Injection Q COM = 0; RS = 0; CL = 1nF;
Figure 3 +25°C4pC
Note 1: Signals on NO, NC, COM, or IN exceeding V+ or V- are clamped by internal diodes. Limit forward-diode current to
maximum current rating.
MAX4647/MAX4648
25ΩSPST Analog Switches in SOT23-6
________________________________________________________________________________________ 3
MAX4647/MAX4648
PARAMETER
SYMBOL
CONDITIONS TA
MIN
TYP
MAX
UNITS
Off-Isolation VISO CL = 5pF; RL = 50Ω; f = 1MHz;
VCOM = 1VRMS; Figure 4 +25°C -92 dB
Total Harmonic
Distortion THD RL = 600Ω, 5Vp-p,
f = 20Hz to 20kHz +25°C
0.006
%
VNO or VNC
Off-Capacitance
CNO(OFF),
CNC
(
OFF
)
f = 1MHz; Figure 5 +25°C6pF
COM Off-Capacitance
CCOM
(
OFF
)
f = 1MHz; Figure 5 +25°C6pF
COM On-Capacitance
CCOM
(
ON
)
f = 1MHz; Figure 6 +25°C19pF
POWER SUPPLY
Power Supply Range TMIN to TMAX
±4.5 ±20
V
+25°C45
100
VIN = 5V TMIN to TMAX
150
+25°C
0.001
1
Positive Supply Current
I+
VIN = 0 or V+ TMIN to TMAX 10
µA
+25°C
0.001
1
Negative Supply
Current I- VIN = 0 or 5V TMIN to TMAX 10 µA
ELECTRICAL CHARACTERISTICS—Dual ±15V Supplies (continued)
(V+ = +15V, V- = -15V, VIH = 2.4V, VIL = 0.8V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C.
(Notes 2, 3)
ELECTRICAL CHARACTERISTICS—Single +12V Supply
(V+ = +12V, V- = 0, VIH = 2.4V, VIL = 0.8V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
(Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS TA
MIN
TYP
MAX
UNITS
ANALOG SWITCH
Analog Signal Range
VNO, VNC,
VCOM 0V+V
+25°C3645
On-Resistance RON ICOM = 10mA; VNO
or VNC = +10V TMIN to TMAX 60 Ω
+25°C46
On-Resistance
Flatness (Note 4)
RFLAT
(
ON
)
ICOM = 10mA; VNO
or VNC = +2V, +6V, +10V TMIN to TMAX 8Ω
DYNAMIC
+25°C
100 175
Turn-On Time tON V
N O or V
N C
= + 10V ; RL = 300Ω;
C
L = 35p F; Fi g ur e 2 TMIN to TMAX
225
ns
+25°C68
150
Turn-Off Time tOFF V
N O or V
N C = + 10V ; RL = 300Ω;
C
L = 35p F; Fi g ur e 2 TMIN to TMAX
200
ns
Charge Injection Q COM = 0; RS = 0; CL = 1nF;
Figure 3 +25°C-5pC
MAX4647/MAX4648
25ΩSPST Analog Switches in SOT23-6
4 _______________________________________________________________________________________
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
10
15
20
25
30
35
40
45
50
-20 -10 0 10 20
ON-RESISTANCE
vs. VCOM (DUAL SUPPLIES)
MAX4647/48 toc01
VCOM (V)
RON (Ω)
A: V+ = +8, V- = -8V
B: V+ = +10V, V- = -10V
C: V+ = +12V, V- = -12V
D: V+ = +15V, V- = -15V
E: V+ = +20V, V- = -20V
A
B
CDE
10
15
20
25
30
35
40
45
50
0102030
ON-RESISTANCE
vs. VCOM (SINGLE SUPPLY)
MAX4647/48 toc02
VCOM (V)
RON (Ω)
V+ = +12V
V+ = +9V
V+ = +24V
V+ = +36V
0
10
5
20
15
25
30
-15 -5 0-10 5 10 15
ON-RESISTANCE vs.
VCOM AND TEMPERATURE (DUAL SUPPLIES)
MAX4647/48 toc03
VCOM (V)
RON (Ω)
TA = +85°C
TA = +25°C
TA = -40°C
V+ = +15V
V- = -15V
15
20
25
30
35
40
45
50
55
0 5 10 15
ON-RESISTANCE vs.
VCOM AND TEMPERATURE (SINGLE SUPPLY)
MAX4647/48 toc04
VCOM (V)
RON (Ω)
TA = +85°C
TA = +25°C
TA = -40°C
V+ = +12V
V- = O
0.00001
0.001
0.0001
0.1
0.01
1
10
-40 20 40-20 0 60 80
ON-LEAKAGE CURRENT
vs. TEMPERATURE
MAX4647/48 toc05
TEMPERATURE (°C)
ON-LEAKAGE (nA)
V+ = +15V
V- = -15V
VCOM = 10V
DUAL SUPPLIES
SINGLE SUPPLY
±
0.0001
0.001
0.01
0.1
1
OFF-LEAKAGE CURRENT
vs. TEMPERATURE
MAX4647/48 toc06
TEMEPERATURE (°C)
OFF-LEAKAGE (nA)
-40 20 40-20 0 60 80
V+ = +15V
V- = -15V
VNC OR VNO = ±10V
VCOM = 10V
DUAL SUPPLIES
SINGLE SUPPLY
±
ELECTRICAL CHARACTERISTICS—Single +12V Supply (continued)
(V+ = +12V, V- = 0, VIH = 2.4V, VIL = 0.8V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
(Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS TA
MIN
TYP
MAX
UNITS
Power Supply Range
TMIN to TMAX +9
+36
V
+25°C2050
VIN = 5V TMIN to TMAX 75
+25°C
0.001
1
Positive Supply
Current I+
VIN = 0 or V+ TMIN to TMAX 10
µA
Note 2: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 3: SOT packaged parts are 100% tested at +25°C. Limits across the full temperature range are guaranteed by design and
correlation.
Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal range.
MAX4647/MAX4648
25ΩSPST Analog Switches in SOT23-6
_______________________________________________________________________________________ 5
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
Pin Description
02314
SUPPLY CURRENT
vs. LOGIC THRESHOLD
MAX4647/48 toc10
IN (V)
I+ (µA)
5786 9 10 12 1311 14 15
0.000001
0.0001
0.00001
0.1
0.01
0.001
1
10
100
1000
V+ = +15V
V- = -15V
VCOM = +14V
-40
-30
-20
-10
0
10
20
30
40
-15 -5-10 0 5 10 15
CHARGE INJECTION vs. VCOM
MAX4647/48 toc11
VCOM (V)
CHARGE (pC)
A: V+ = +15V, V- = -15V
B: V+ = +12V, V- = 0
A
B
0
1.5
1.0
0.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0 102030
LOGIC THRESHOLD
vs. SUPPLY VOLTAGE
MAX4647/48 toc12
V+ (V)
LOGIC THRESHOLD (V)
MAX4647
MAX4648
PIN NAME
FUNCTION
1 — NC Normally Closed Switch Terminal
— 1 NO Normally Open Switch Terminal
2 2 V- Negative Supply Voltage Input
3 3 IN Digital Control Input
4 4 GND Ground
5 5 V+ Positive Supply Voltage Input
6 6 COM Analog Switch Common
0
-100
0.1 1 10 100 1000
FREQUENCY RESPONSE
-80
MAX4647/48 toc07
FREQUENCY (MHz)
LOSS (dB)
-60
-40
-20
-30
-50
-70
-90
-10 ON-RESPONSE
OFF-ISOLATION
100
0.0001
10 1k 10k100 100k
TOTAL HARMONIC DISTORTION
vs.FREQUENCY
MAX4647/48 toc08
FREQUENCY (Hz)
DISTORTION (%)
0.001
0.01
0.1
1
10
V+ = +15V
V- = -15V
5VRMS SIGNAL
600Ω SOURCE
AND LOAD
SIGNAL DISTORTION
MEASUREMENT LIMITS
0.001
0.01
1
0.1
10
100
-40 10-15 35 60 85
SUPPLY CURRENT vs. TEMPERATURE
MAX4647/48 toc09
TEMPERATURE (°C)
I+, I-, IGND (µA)
V+ = +15V
V- = -15V
IN = 5V I+, IGND
I-
Applications Information
Overvoltage Protection
Proper power-supply sequencing is recommended for
all CMOS devices. Do not exceed the absolute maxi-
mum ratings because stresses beyond the listed rat-
ings can cause permanent damage to the devices.
Always sequence V+ on first, then V-, followed by the
logic inputs, NO, NC, or COM. If power-supply
sequencing is not possible, add two small signal
diodes (D1, D2) in series with supply pins (Figure 1).
Adding diodes reduces the analog signal range to one
diode drop below V+ and one diode drop above V-, but
does not affect the devices’ low switch resistance and
low leakage characteristics. Device operation is
unchanged, and the difference between V+ and V-
should not exceed 44V. These protection diodes are
not recommended when using a single supply.
Off-Isolation at High Frequencies
In 50Ωsystems, the high-frequency on-response of
these parts extends from DC to above 300MHz, with a
typical loss of -2dB. When the switch is turned off, how-
ever, it behaves like a capacitor, and off-isolation
decreases with increasing frequency. This effect is
more pronounced with higher source and load imped-
ances. Above 5MHz, circuit board layout becomes criti-
cal. The graphs shown in the Typical Operating
Characteristics were taken using a 50Ωsource and
load connected with BNC connectors.
MAX4647/MAX4648
25ΩSPST Analog Switches in SOT23-6
6 _______________________________________________________________________________________
tr < 20ns
tf < 20ns
50%
0
LOGIC
INPUT
V-
V-
RL
300Ω
NO
OR NC
GND
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
VO = VCOM ( RL )
RL + RON
SWITCH
INPUT
IN
+3V
tOFF
0
COM
SWITCH
OUTPUT
0.9V00.9V0
tON
VO
SWITCH
OUTPUT
LOGIC
INPUT
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
V+
CL
35pF
V+
VO
VCOM
0
REPEAT TEST FOR EACH SWITCH. FOR LOAD
CONDITIONS, SEE Electrical Characteristics.
MAX4647
MAX4648
Figure 2. Switching-Time Test Circuit
V+
COM
D2
D1
V-
NO
Vg
V+
V-
MAX4647
MAX4648
Figure 1. Overvoltage Protection Using External Blocking
Diodes
MAX4647/MAX4648
25ΩSPST Analog Switches in SOT23-6
________________________________________________________________________________________ 7
IN 0 OR 3V
SIGNAL
GENERATOR
V+
C
ANALYZER NC OR NO
RL
GND
COM
C
V-
V-
V+
MAX4647
MAX4648
Figure 4. Off-Isolation Test Circuit
CAPACITANCE
METER
NC OR NO
COM
GND C
V-
V-
IN 0 OR 3V
CV+
f = 1MHz
V+
MAX4647
MAX4648
Figure 5. Channel-Off Capacitance Test Circuit
VGEN
GND
NC OR
NO
CL
VO
V-
V-
V+
VO
VIN OFF ON OFF
∆VO
Q = (∆VO)(CL)
COM
VIN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
OFF ON OFF
VIN
VIN = +3V
V+
RGEN
IN
MAX4647
MAX4648
Figure 3. Charge Injection Test Circuit
MAX4647/MAX4648
25ΩSPST Analog Switches in SOT23-6
8 _______________________________________________________________________________________
CAPACITANCE
METER
NC OR NO
COM
GND C
V-
-15V
IN 0 OR 3V
C+15V
f = 1MHz
V+
MAX4647
MAX4648
Figure 6. Channel-On Capacitance Test Circuit
Chip Information
TRANSISTOR COUNT: 24
PROCESS TECHNOLOGY: CMOS
MAX4647/MAX4648
25ΩSPST Analog Switches in SOT23-6
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 _____________________ 9
© 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
6LSOT.EPS
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.)
Revision History
Pages changed at Rev 1: 1, 9