MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
General Description
The MAX4638/MAX4639 are single 8:1 and dual 4:1
CMOS analog multiplexers/demultiplexers (muxes/
demuxes). Each mux operates from a single +1.8V to
+5V supply or dual ±2.5V supplies. These devices feature 3.5Ω on-resistance (RON) when powered with a
single +5V supply and have -75dB off-isolation and
-85dB crosstalk from the output to each off channel.
The switching times are 18ns tON and 7ns tOFF. They
feature a -3dB 85MHz bandwidth and a guaranteed
0.25nA leakage current at +25°C.
A +1.8V to +5.5V operating range makes the MAX4638/
MAX4639 ideal for battery-powered, portable instruments. All channels guarantee break-before-make
switching. These parts feature bidirectional operation
and can handle Rail-to-Rail® analog signals. All control
inputs are TTL/CMOS-logic compatible. Decoding is in
standard BCD format, and an enable input is provided to
simplify cascading of devices. These devices are available in small 16-pin TQFN, TSSOP, and SO packages, as
well as a 20-pin TQFN package.
Applications
Features
♦ Guaranteed RON
3.5Ω (+5V or ±2.5V Supplies)
6Ω (+3V Supply)
♦ Guaranteed 0.4Ω RON Match Between Channels
♦ Guaranteed 1Ω RON Flatness Over Signal Range
♦ Guaranteed Low Leakage Currents
0.25nA at +25°C
♦ Switching Times: tON = 18ns, tOFF = 7ns
♦ +1.8V to +5.5V Single-Supply Operation
±2.5V Dual-Supply Operation
♦ Rail-to-Rail Signal Handling
♦ TTL/CMOS-Logic Compatible
♦ Crosstalk: -80dB (1MHz)
♦ Off-Isolation: -60dB (10MHz)
Ordering Information
PART
TEMP RANGE
MAX4638ETE+T
PIN-PACKAGE
-40°C to +85°C
16 TQFN-EP* (4 4)
16 TSSOP
Automatic Test Equipment
MAX4638EUE+T
-40°C to +85°C
Low-Voltage Data-Acquisition Systems
MAX4638ESE+T
-40°C to +85°C
16 SO
Audio and Video Signal Routing
MAX4638ETP+T
-40°C to +85°C
20 TQFN-EP* (4 4)
Medical Equipment
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*EP = Exposed pad.
Ordering Information continued at end of data sheet.
Battery-Powered Equipment
Relay Replacement
Pin Configurations/Functional Diagrams
TOP VIEW
MAX4639
MAX4638
A0 1
+
+
EN 2
V- 3
LOGIC
16 A1
A0 1
15 A2
EN 2
14 GND
V- 3
16 A1
15 GND
LOGIC
14 V+
NO1 4
13 V+
NO1A 4
13 NO1B
NO2 5
12 NO5
NO2A 5
12 NO2B
NO3 6
11 NO6
NO3A 6
11 NO3B
NO4 7
10 NO7
NO4A 7
10 NO4B
COM 8
9
NO8
COMA 8
9
TSSOP/SO
COMB
TSSOP/SO
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
19-1782; Rev 3; 10/12
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
ABSOLUTE MAXIMUM RATINGS
(Voltages Referenced to GND)
V+ to V- .................................................................................+6V
V+, A_, EN ................................................................-0.3V to +6V
V- ............................................................................+0.3V to -6V
NO_, COM_ (Note 1) ................................... -0.3V to (V+ + 0.3V)
Continuous Current A_, EN ............................................. ±30mA
Continuous Current NO_, COM_ .................................. ±100mA
Peak Current (NO_, COM_)
(pulsed at 1ms, 10% duty cycle) .............................. ±200mA
Continuous Power Dissipation (TA = +70°C)
TQFN (derate 16.9mW/°C above +70°C).....................1349mW
TSSOP (derate 9.4mW/°C above +70°C) ....................754.7mW
SO (derate 8.70mW/°C above +70°C) ...........................696mW
Operating Temperature Range
MAX463_E_ E ................................................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
Soldering Temperature (reflow) ......................................+260°C
Note 1: Signals on COM_, NO_ exceeding V+ or V- are clamped by internal diodes. A_ and EN are clamped only to V- and can
exceed V+ up to their maximum ratings. Limit forward-diode 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—+5V Single Supply
(V+ = +5V ±10%, 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
MIN
TYP
(Note 2)
MAX
UNITS
V+
V
ANALOG SWITCH
Analog Signal Range
VCOM_,
VNO_
0
RON
V+ = +4.5V, ICOM_ = 10mA, TA = +25°C
VNO_ = +3.5V
TA = TMIN to TMAX
2.5
3.5
4.5
Ω
ΔRON
V+ = +4.5V, ICOM_ = 10mA, TA = +25°C
VNO_ = +3.5V
TA = TMIN to TMAX
0.1
0.4
0.5
Ω
On-Resistance Flatness (Note 6)
RFLAT(ON)
V+ = +4.5V; ICOM_ = 10mA; TA = +25°C
VNO_ = +1V, +2V, +3.5V
TA = TMIN to TMAX
0.75
1
NO_ Off-Leakage Current
(Note 7)
INO_(OFF)
V+ = +5.5V; VCOM _ = +1V,
+4.5V; VNO_ = +4.5V, +1V
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.35
COM_ Off-Leakage Current
(Note 7)
ICOM_(OFF)
V+ = +5.5V; VCOM_ = +1V,
+4.5V; VNO_ = +4.5V, +1V
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.75
COM_ On-Leakage Current
(Note 7)
V+ = +5.5V; VCOM_ = +1V,
ICOM_(ON) +4.5V; VNO_ = +1V, +4.5V,
or unconnected
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.75
On-Resistance
On-Resistance Match
Between Channels (Notes 4, 5)
1.2
±0.01
0.25
0.35
±0.01
0.25
0.75
±0.01
Ω
nA
nA
0.25
nA
0.75
DIGITAL I/O
Input Logic High
VIH
Input Logic Low
VIL
IIH, IIL
Input Leakage Current
Digital Input Capacitance
2.4
VIN_ = 0 or V+
-0.1
CIN
V
0.005
0.8
V
0.1
µA
2
pF
DYNAMIC
Transition Time (Note 7)
2
tTRANS
RL = 100Ω, CL = 35pF,
VNO1 = +3V or 0,
VNO8 = 0 or +3V, Figure 2
TA = +25°C
14
18
ns
TA = TMIN to TMAX
20
Maxim Integrated
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
(V+ = +5V ±10%, 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
Break-Before-Make (Note 7)
Enable Turn-On Time (Note 7)
Enable Turn-Off Time (Note 7)
On-Channel -3dB Bandwidth
Charge Injection
SYMBOL
CONDITIONS
tBBM
RL = 100Ω, CL = 35pF,
VNO_ = +3V, Figure 3
tON(EN)
RL = 100Ω, CL = 35pF,
VNO1 = +3V, VNO2 to
VNO8 = 0, Figure 4
tOFF(EN)
BW
Q
RL = 100Ω, CL = 35pF,
VNO1 = +3V, VNO2 to
VNO8 = 0, Figure 4
Signal =
0dBm,
CL = 5pF,
50Ω in and
out, Figure 6
Total Harmonic Distortion
VCT
THD
14
18
ns
TA = TMIN to TMAX
TA = +25°C
20
5
7
ns
TA = TMIN to TMAX
TA = +25°C
8
50
MHz
13
pC
VNO_ = 0V, f = 1MHz,
Figure 8
TA = +25°C
9
pF
MAX4638
TA = +25°C
40
MAX4639
TA = +25°C
20
MAX4638
TA = +25°C
54
MAX4639
TA = +25°C
34
TA = +25°C
-55
VCOM_ =
VNO_ = 0V,
f = 1MHz,
Figure 8
MAX4639
pF
pF
CL = 5pF, RL = 50Ω,
f = 1MHz, VNO_ =
1VRMS , Figure 6
Crosstalk (Note 9)
ns
1
TA = +25°C
VCOM_ = 0V,
CCOM_(OFF) f = 1MHz,
Figure 8
VISO
8
UNITS
VGEN = +2.5V, RGEN = 0,
CL = 1.0nF, Figure 5
COM_ Off-Capacitance
Off-Isolation (Note 8)
TA = +25°C
MAX
85
CNO_(OFF)
C(ON)
TA = +25°C
TA = TMIN to TMAX
TYP
(Note 2)
TA = +25°C
NO_ Off-Capacitance
Switch On-Capacitance
MAX4638
MIN
dB
CL = 5pF, RL = 50Ω,
f = 10MHz, VNO_ =
1VRMS , Figure 6
TA = +25°C
-75
CL = 5pF, RL = 50Ω,
f = 10MHz, VNO_=
1VRMS , Figure 7
TA = +25°C
-65
CL = 5pF, RL = 50Ω,
f = 1MHz, VNO_ =
1VRMS, Figure 7
TA = +25°C
-85
RL = 600Ω,
RFLAT(ON)/RL
TA = +25°C
0.5
dB
%
SUPPLY
Positive Supply Current
Maxim Integrated
I+
V+ = +5.5V, VIN = 0 or V+
0.001
1.0
µA
3
MAX4638/MAX4639
ELECTRICAL CHARACTERISTICS—+5V Single Supply (continued)
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
ELECTRICAL CHARACTERISTICS—+3.0V Single Supply
(V+ = +2.7V to +3.3V, V- = 0, VIH = +2.0V, VIL = +0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+ = +3V
and TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
(Note 2)
MAX
UNITS
V+
V
ANALOG SWITCH
Analog Signal Range
On-Resistance
On-Resistance Match
Between Channels (Notes 4, 5)
On-Resistance Flatness (Note 6)
NO_ Off-Leakage Current
(Note 7)
VCOM_,
VNO_
0
RON
ICOM_ = 10mA,
VNO_ = +1.7V
ΔRON
ICOM_ = 10mA,
VNO_ = +1.7V
RFLAT(ON)
INO_(OFF)
ICOM_ = 10mA;
VNO_ = +1.5V, +1.7V,
+1.9V
V+ = +3.3V;
VCOM_ = +1V, +3V; VNO_
= +3V, +1V
COM_ Off-Leakage Current
(Note 7)
V+ = +3.3V;
ICOM_(OFF) VCOM_ = +1V, +3V; VNO_
= +3V, +1V
COM_ On-Leakage Current
(Note 7)
V+ = +3.3V; VCOM_ =
ICOM_(ON) +1V, +3V; VNO_ = +1V,
+3V, or unconnected
TA = +25°C
4.5
TA = TMIN to TMAX
6
8
TA = +25°C
0.25
TA = TMIN to TMAX
0.6
0.8
TA = +25°C
1
TA = TMIN to TMAX
2
2.5
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.35
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.35
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.35
±0.01
Ω
Ω
Ω
0.25
nA
0.35
±0.01
0.25
nA
0.35
±0.01
0.25
nA
0.35
DIGITAL I/O
Input Logic High
VIH
Input Logic Low
VIL
Input Leakage Current
Digital Input Capacitance
IIH, IIL
2.0
VIN_ = 0 or V+
-0.1
CIN
V
0.005
0.4
V
0.1
µA
2
pF
DYNAMIC
TA = +25°C
tTRANS
VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 2
tBBM
VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 3
TA = TMIN to TMAX
Enable Turn-On Time (Note 7)
tON(EN)
VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 4
TA = TMIN to TMAX
Enable Turn-Off Time (Note 7)
tOFF(EN)
VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 4
TA = TMIN to TMAX
Transition Time (Note 7)
Break-Before-Make (Note 7)
4
16
TA = TMIN to TMAX
24
TA = +25°C
TA = +25°C
TA = +25°C
20
8
ns
1
15
20
24
5
ns
9
10
ns
ns
Maxim Integrated
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
ELECTRICAL CHARACTERISTICS—+3.0V Single Supply (continued)
(V+ = +2.7V to +3.3V, V- = 0, VIH = +2.0V, VIL = +0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+ = +3V
and TA = +25°C.) (Notes 2, 3)
PARAMETER
Off-Isolation (Note 8)
Crosstalk (Note 9)
On-Channel -3dB Bandwidth
SYMBOL
VISO
VCT
BW
CONDITIONS
TA = +25°C
CL = 5pF, RL = 50Ω,
f = 1MHz, VNO_ = 1VRMS,
Figure 6
TA = +25°C
-75
CL = 5pF, RL = 50Ω,
f = 10MHz, VNO_ = 1VRMS,
Figure 7
TA = +25°C
-65
dB
-85
TA = +25°C
50
TA = +25°C
85
TA = +25°C
9
MAX4638
TA = +25°C
40
MAX4639
TA = +25°C
20
VCOM = VNO_ MAX4638
= 0V,
f = 1MHz,
MAX4639
Figure 8
TA = +25°C
54
TA = +25°C
34
Signal =
MAX4638
0dBm, 50Ω in
and out,
MAX4639
Figure 6
VNO_ = 0V, f = 1MHz,
Figure 8
VCOM_ = 0V,
CCOM_(OFF) f = 1MHz,
Figure 8
I+
UNITS
55
TA = +25°C
COM_ Off-Capacitance
SUPPLY
Positive Supply Current
MAX
dB
CL = 5pF, RL = 50Ω,
f = 1MHz, VNO_ = 1VRMS,
Figure 7
CNO_(OFF)
C(ON)
TYP
(Note 2)
CL = 5pF, RL = 50Ω,
f = 10MHz,
VNO_ = +1VRMS , Figure 6
NO_ Off-Capacitance
Switch On-Capacitance
MIN
MHz
pF
pF
pF
V+ = +3.3V, VIN_ = 0 or V+
0.001
1
µA
ELECTRICAL CHARACTERISTICS—±2.5V Dual Supplies
(V+ = +2.5 ±10%, V- = -2.5V ±10%, VIH = +2.0V, VIL = +0.4V, TA =TMIN to TMAX, unless otherwise noted. Typical values are at
V± = ±2.5V and TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
(Note 2)
MAX
UNITS
V+
V
ANALOG SWITCH
Analog Signal Range
On-Resistance
On-Resistance Match
Between Channels (Notes 4, 5)
Maxim Integrated
VCOM_,
VNO_
RON
RON
VICOM_ = 10mA, VNO_ = ±1.5V, TA = +25°C
V+ = +2.25V, V- = -2.25V
TA = TMIN to TMAX
ICOM_ = 10mA, VNO_ = ±1.5V, TA = +25°C
V+ = +2.25V, V- = -2.25V
TA = TMIN to TMAX
2.5
3.5
4.5
0.2
0.4
0.5
5
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
ELECTRICAL CHARACTERISTICS—±2.5V Dual Supplies (continued)
(V+ = +2.5 ±10%, V- = -2.5V ±10%, VIH = +2.0V, VIL = +0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
V± = ±2.5V and TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
On-Resistance Flatness
(Note 6)
I
= 10mA; VNO_ = ±1.5V, TA = +25°C
RFLAT(ON) COM_
0; V+ = +2.25V; V- = -2.25V TA = TMIN to TMAX
NO_ Off-Leakage
Current (Note 7)
V+ = +2.75V; V- = -2.75V;
INO_ (OFF) VCOM_ = +1V, +2.5V;
VNO_ = +2.5V, +1V
COM_ Off-Leakage
Current (Note 7)
V+ = +2.75V; V- = -2.75;
ICOM_ (OFF) VCOM_ = +1V, +2.5V;
VNO_ = +2.5V, +1V
COM_ On-Leakage
Current (Note 7)
V+ = +2.5V; V- = -2.5;
V
= +1V, +2.5V;
ICOM_ (ON) COM_
VNO_ = +1V, +2.5V,
or unconnected
MIN
TYP
(Note 2)
MAX
0.75
1
1.2
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.35
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.35
TA = +25°C
-0.25
TA = TMIN to TMAX
-0.35
±0.01
UNITS
0.25
nA
0.35
±0.01
0.25
nA
0.35
±0.01
0.25
nA
0.35
DIGITAL I/O
Input Logic High
VIH
Input Logic Low
VIL
Input Leakage Current
Digital Input Capacitance
IIH, IIL
2.0
VIN_ = 0 or V+
-0.1
CIN
V
0.005
0.4
V
0.1
μA
2
pF
DYNAMIC
Transition Time (Note 7)
tTRANS
Enable Turn-On Time
(Note 7)
tON(EN)
Enable Turn-Off Time
(Note 7)
tOFF(EN)
Break-Before-Make (Note 7)
tBBM
VNO_ = +1.2V, CL = 35pF, TA = +25°C
RL = 100, Figure 2
TA = TMIN to TMAX
VNO_ = +1.2V, CL = 35pF,
RL = 100, Figure 4
VNO_ = +1.2V, CL = 35pF,
RL = 100, Figure 4
VNO_ = +1.2V, CL = 35pF,
RL = 100, Figure 3
16
20
ns
24
TA = +25°C
14
18
ns
TA = TMIN to TMAX
20
TA = +25°C
5
7
ns
TA = TMIN to TMAX
8
TA = +25°C
8
ns
TA = TMIN to TMAX
1
Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in
this data sheet.
Note 3: Parts are tested at +85°C and guaranteed by design over the entire temperature range.
Note 4: ΔRON = RON(MAX) - RON(MIN).
Note 5: ΔRON matching specifications for TQFN packaged parts are guaranteed by design.
Note 6: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal ranges.
Note 7: Guaranteed by design.
Note 8: Off-Isolation = 20log10 (VCOM_ / VNO_), VCOM_ = output, VNO_ = input to off switch.
Note 9: Between any two switches.
6
Maxim Integrated
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
Typical Operating Characteristics
(V+ = +5V, V- = 0V, TA = +25°C, unless otherwise noted.)
20
V+ = +5V
3.5
6
TA = +85°C
V+ = +3V
5
TA = +85°C
10
4
2.5
2.0
TA = -40°C
RON (Ω)
R0N (Ω)
TA = +25°C
1.5
V+ = +3V
1
0.5
0
0
0
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX4638 toc04
V+ = +5V
CHARGE (pC)
14
140
120
12
10
8
6
100
3.0
1
0.1
0.01
2
60
0
0.001
-2.5
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
-0.5
1.5
5.5
3.5
-40
-15
10
35
60
SUPPLY VOLTAGE (V)
VCOM (V)
TEMPERATURE (°C)
LOGIC LEVEL THRESHOLD vs.
SUPPLY VOLTAGE AND TEMPERATURE
ENABLE TURN-ON/TURN-OFF TIME
vs. SUPPLY VOLTAGE
ENABLE TURN-ON/TURN-OFF TIME
vs. TEMPERATURE
1.6
40
35
TA = -40°C
1.2
tON
25
20
TA = +85°C
10
0
0
2.8
3.3
3.8
4.3
SUPPLY VOLTAGE (V)
Maxim Integrated
4.8
5.3
tOFF
8
2
5
2.3
10
4
tOFF
0.8
0.6
tON
6
15
1.0
85
12
TIME (ns)
TA = +25°C
1.8
14
30
TIME (ns)
1.4
16
MAX4638 toc08
45
MAX4638 toc07
1.8
LOGIC VOLTAGE (V)
2.5
10
4
80
2.0
SUPPLY CURRENT
vs. TEMPERATURE
16
160
1.5
CHARGE INJECTION vs. VCOM
V± = ±2.5V
18
1.0
VCOM (V)
SUPPLY CURRENT (nA)
180
SUPPLY CURRENT (pA)
20
0.5
VCOM (V)
VCOM (V)
200
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
MAX4638 toc05
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
MAX4638 toc06
V+ = +5V
0
TA = +25°C
TA = -40°C
2
1.0
5
0
3
MAX4638 toc09
RON (Ω)
3.0
15
MAX4638 toc03
V+ = +1.8V
MAX4638 toc02
4.0
MAX4638 toc01
25
ON-RESISTANCE vs. VCOM AND
TEMPERATURE
ON-RESISTANCE vs. VCOM AND
TEMPERATURE
ON-RESISTANCE vs. VCOM
1.5
2.0
2.5
3.0
3.5
4.0
4.5
SUPPLY VOLTAGE (V)
5.0
5.5
-40
-15
10
35
60
85
TEMPERATURE (°C)
7
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
Typical Operating Characteristics (continued)
(V+ = +5V, V- = 0V, TA = +25°C, unless otherwise noted.)
OFF-ISOLATION
-60
CROSSTALK
10
-120
1
OFF-LEAKAGE
0.06
0.04
0.1
0.02
0
0.001
0.01
0.1
1
10
100
MAX4638 toc12
ON-LEAKAGE
0.01
-100
V+ = +2.5V
V- = -2.5V
5Vp-p SIGNAL
600Ω IN AND OUT
0.08
THD (%)
-40
-80
100
LEAKAGE CURRENT (pA)
RESPONSE (dB)
ON-RESPONSE MAX4639
0.10
MAX4638 toc11
ON-RESPONSE MAX4638
-20
1000
MAX4638 toc10
0
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
ON/OFF-LEAKAGE CURRENT
vs. TEMPERATURE
FREQUENCY RESPONSE
1000
-40
-20
0
FREQUENCY (MHz)
20
40
60
0.01
80
0.1
1
10
100
FREQUENCY (kHz)
TEMPERATURE (°C)
Pin Description
PIN
MAX4638
MAX4639
NAME
TQFN-EP
DIP/SO
8
FUNCTION
TQFN-EP
DIP/SO
16-PIN
20-PIN
16-PIN
20-PIN
1, 15, 16
15, 13, 14
19, 18, 17
—
—
—
A0, A2, A1
Address Inputs
—
—
—
1, 16
15, 14
19, 17
A0, A1
Address Inputs
2
16
1
2
16
1
EN
3
1
2
3
1
2
V-
4–7
2–5
3–6
—
—
—
NO1–N04
—
—
—
4–7
2–5
3–6
NO1A–NO4A
Bidirectional Analog Inputs
8
6
7
—
—
—
COM
Bidirectional Analog outputs
—
—
—
8, 9
6, 7
7, 9
COMA, COMB
Bidirectional Analog outputs
9–12
7–10
10–13
—
—
—
NO8–NO5
Bidirectional Analog Inputs
—
—
—
10–13
8–11
10–13
NO4B–NO1B
Bidirectional Analog Inputs
Enable
Negative-Supply Voltage Input
Bidirectional Analog Inputs
13
11
14
14
12
14
V+
14
12
15
15
13
15
GND
Ground
Positive-Supply Voltage Input
—
—
8, 9,
16, 20
—
—
8, 16,
18, 20
N.C.
No Connection. Not internally
connected.
—
—
—
—
—
—
EP
Exposed Pad (TQFN Only).
Connect EP to V-.
Maxim Integrated
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
Detailed Description
The MAX4638/MAX4639 are low-voltage, CMOS analog
muxes. The MAX4638 is an 8:1 mux that switches one
of eight inputs (NO1–NO8) to a common output (COM)
as determined by the 3-bit binary inputs A0, A1, and
A2. The MAX4639 is a 4:1 dual mux that switches one
of four differential inputs to a common differential output as determined by the 2-bit binary inputs A0 and A1.
Both the MAX4638/MAX4639 have an EN input that can
be used to enable or disable the device. When disabled, all channels are switched off. See Truth Tables.
+2.5V
V+
*
*
NO_
COM_
*
*
V-
Applications Information
D2
Overvoltage Protection
Proper power-supply sequencing is recommended for
all CMOS devices. Do not exceed the absolute maximum ratings because stresses beyond the listed ratings can cause permanent damage to the devices.
Always sequence V+ on first, then V-, followed by the
logic inputs. If power-supply sequencing is not possible, add two small-signal diodes (D1, D2) in series with
the supply pins for overvoltage protection (Figure 1).
Adding diodes reduces the analog signal range to one
diode drop below V+ and one diode drop above V-, but
MAX4638
MAX4639
D1
-2.5V
* INTERNAL PROTECTION DIODES
Figure 1. Overvoltage Protection Using External Blocking
Diodes
does not affect the devices’ low switch resistance.
Device operation is unchanged, and the difference
between V+ and V- should not exceed 6V. These protection diodes are not recommended when using a single supply. For single-supply operation, V- should be
connected to GND as close to the device as possible.
Truth Tables
MAX4638 (Single 8-to-1 Mux)
MAX4639 (Dual 4-to-1 Mux)
A2
A1
A0
EN
ON SWITCH
A1
A0
EN
COMA
X
X
X
0
None
X
X
0
None
COMB
None
0
1
NO1A
NO1B
0
0
0
1
NO1
0
0
0
1
1
NO2
0
1
1
NO2A
NO2B
0
1
0
1
NO3
1
0
1
NO3A
NO3B
1
1
1
NO4A
NO4B
0
1
1
1
NO4
1
0
0
1
NO5
1
0
1
1
NO6
1
1
0
1
NO7
1
1
1
1
NO8
Maxim Integrated
9
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
Test Circuits/Timing Diagrams
V+
V+
NO1
A2
A1
A0
50Ω
MAX4638
VIH
VNO1
NO2–NO7
NO8
VNO8
EN
COM
GND
VIN
V-
VOUT
100Ω
35pF
ADDRESS
INPUT
VIN
V-
V+
A1
0V
tTRANS
NO1B
10%
90%
SWITCH
OUTPUT
VOUT
VNO1
NO1A–NO4A
A0
50%
VN01
V+
tR < 5ns
tF < 5ns
+3V
VN08
50Ω
MAX4639
VIH
EN
COMB
V100Ω
GND
VIN
tTRANS
VNO8
NO4B
VOUT
35pF
V-
Figure 2. Transition Time
V+
VIH
V+
EN
A0
NO1
NO2–NO7
VNO1
ADDRESS +3V
INPUT
0V
VA
MAX4638
VN0_
A1
VA
tR < 5ns
tF < 5ns
50%
90%
VNO8
NO8
A2
GND
COM
VOUT
V-
35pF
50Ω
100Ω
SWITCH
OUTPUT
VOUT
0V
tBBM
V-
Figure 3. MAX4638 Break-Before-Make Interval
10
Maxim Integrated
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
Test Circuits/Timing Diagrams (continued)
V+
VEN
V+
EN
NO1
VNO1
NO2–NO8
A0
A1
MAX4638
A2
COM
GND
50Ω
LOGIC
INPUT
VEN
VOUT
V-
35pF
100Ω
VVEN
SWITCH
OUTPUT
VOUT
V+
EN
NO1B
A0
50%
0V
VNO1
V+
VNO1
tR < 5ns
tF < 5ns
+3V
90%
90%
0V
NO_, COMA
tON(EN)
MAX4639
A1
COMB
V-
GND
50Ω
tOFF(EN)
VOUT
35pF
100Ω
V-
Figure 4. Enable Switching Time
V+
RS
V+
NO_
VEN
VS
CHANNEL
SELECT
LOGIC
INPUT
VEN
EN
A0
A1
MAX4638
MAX4639 COM
+3V
OFF
ON
OFF
ON
ON
OFF
0V
VOUT
A2
GND
V-
CL
1nF
ΔVOUT
VOUT
ΔVOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
VQ = ΔVOUT ✕ CL
Figure 5. Charge Injection
Maxim Integrated
11
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
Test Circuits/Timing Diagrams (continued)
V+
VIN
RS = 50Ω
NO1
V+
1μF
NO8
A0
R
50Ω
MAX4638
MAX4639 COM
A1
A2
GND EN
V+
NO1
V+
V-
RL
50Ω
NO2
VIN
NO8
A0
VOUT
RG = 50Ω
A1
CL
5pF
A2
VOUT
MAX4638
COM
MAX4639
GND EN
V-
RL
50Ω
1μF
V-
VVEN
1μF
OFF-ISOLATION = 20log
VOUT
VEN
VIN
CROSSTALK = 20log
CL
5pF
VOUT
VIN
Figure 7. Crosstalk
Figure 6. Off-Isolation/On-Channel Bandwidth
V+
V+
A2
CHANNEL
SELECT
A1
NO1
MAX4638
MAX4639
NO8
A0
GND
EN
VEN
V-
1MHz
CAPACITANCE
ANALYZER
COM
f = 1MHz
V-
Figure 8. Channel Off/On-Capacitance
12
Maxim Integrated
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
2
11
NO2
3
NO3
4
8
NO7
EN
A0
A1
GND
14
13
V+
NO1A
2
11
NO1B
10
NO5
NO2A
3
10
NO2B
9
NO6
NO3A
4
9
NO3B
TQFN
MAX4639
EP*
TQFN
N.C.
A1
N.C.
18
17
16
N.C.
16
A0
A2
17
19
A1
18
N.C.
A0
19
+
20
N.C.
*CONNECT EP TO V-
20
+
15
V+
5
7
NO8
12
NO4A
6
COM
NO4
5
EP*
1
8
NO1
MAX4638
V-
NO4B
GND
7
12
COMB
1
16
A2
13
V-
6
A1
14
+
COMA
A0
15
+
EN
TOP VIEW
16
Pin Configurations (continued)
EN
1
15
GND
EN
1
15
GND
V-
2
14
V+
V-
2
14
V+
NO1
3
13
NO5
NO1A
3
13
NO1B
NO2
4
12
NO6
NO2A
4
12
NO2B
NO3
5
11
NO7
NO3A
5
11
NO3B
9
10
COMB
NO4B
8
10
NO8
N.C.
9
N.C.
7
8
N.C.
COMA
7
COM
TQFN
EP*
6
6
NO4
EP*
MAX4639
NO4A
MAX4638
TQFN
*CONNECT EP TO V-
Package Information
Ordering Information (continued)
PART
TEMP RANGE
PIN-PACKAGE
-40°C to +85°C
16 TQFN-EP* (4 4)
MAX4639EUE+T
-40°C to +85°C
16 TSSOP
MAX4639ESE+T
-40°C to +85°C
16 SO
MAX4639ETP+T
-40°C to +85°C
20 TQFN-EP* (4 4)
MAX4639ETE+T
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*EP = Exposed pad.
Chip Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but the
drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
16 TQFN
20 TQFN
16 TSSOP
16 SO
T1644+4
T1644+3
U16+2
S16+3
21-0139
21-0139
21-0066
21-0041
90-0070
90-0069
90-0117
90-0097
PROCESS: BiCMOS
Maxim Integrated
13
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,Z
Low-Voltage Analog Multiplexers
Revision History
REVISION
NUMBER
REVISION
DATE
2
9/10
—
3
10/12
Added RoHS ordering information throughout data sheet
DESCRIPTION
PAGES
CHANGED
—
1–16
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent
licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and
max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
14 ________________________________Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
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Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.