19-1782; Rev 3; 10/12
MAX4638/MAX4639
3.5
Ω
, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
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.
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 fea-
ture 3.5Ωon-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 instru-
ments. 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 avail-
able in small 16-pin TQFN, TSSOP, and SO packages, as
well as a 20-pin TQFN package.
Applications
Automatic Test Equipment
Low-Voltage Data-Acquisition Systems
Audio and Video Signal Routing
Medical Equipment
Battery-Powered Equipment
Relay Replacement
Features
♦Guaranteed RON
3.5Ω(+5V or ±2.5V Supplies)
6Ω(+3V Supply)
♦Guaranteed 0.4ΩRON Match Between Channels
♦Guaranteed 1ΩRON 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
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
PART TEMP RANGE PIN-PACKAGE
MAX4638ETE+T -40°C to +85°C 16 TQFN-EP* (4 4)
MAX4638EUE+T -40°C to +85°C 16 TSSOP
MAX4638ESE+T -40°C to +85°C 16 SO
MAX4638ETP+T -40°C to +85°C 20 TQFN-EP* (4 4)
16
15
14
13
12
11
10
9
1
+
2
3
4
5
6
7
8
A1
A2
GND
V+
NO1
V-
EN
A0
TOP VIEW
MAX4638
NO5
NO6
NO7
NO8
COM
NO4
NO3
NO2
TSSOP/SO
LOGIC
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
A1
GND
V+
NO1B
NO1A
V-
EN
A0
MAX4639
NO2B
NO3B
NO4B
COMB
COMA
NO4A
NO3A
NO2A
TSSOP/SO
LOGIC
+
Pin Configurations/Functional Diagrams
Ordering Information continued at end of data sheet.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*
EP = Exposed pad.
MAX4638/MAX4639
3.5
Ω
, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
2Maxim Integrated
ABSOLUTE MAXIMUM RATINGS
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)
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+ 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.
PARAMETER SYMBOL CONDITIONS MIN TYP
( N o t e 2 ) MAX UNITS
ANALOG SWITCH
Analog Signal Range VCOM_,
VNO_ 0V+V
TA = +25°C 2.5 3.5
On-Resistance RON V + = + 4.5V , IC OM_ = 10m A,
V
N O_ = +3.5V TA = TMIN to TMAX 4.5 Ω
TA = +25°C 0.1 0.4
On-Resistance Match
Between Channels (Notes 4, 5) ΔRON V + = + 4.5V , IC OM_ = 10m A,
V
N O_ = +3.5V TA = TMIN to TMAX 0.5 Ω
TA = +25°C 0.75 1
On-Resistance Flatness (Note 6) RFLAT(ON)V + = + 4.5V ; IC OM_ = 10m A;
V
N O_ = +1V , + 2V , + 3.5V TA = TMIN to TMAX 1.2 Ω
TA = +25°C -0.25 ±0.01 0.25
NO_ Off-Leakage Current
(Note 7) INO_(OFF)V + = + 5.5V ; V
C OM _ = +1V ,
+ 4.5V ; V
N O_ = +4.5V, + 1V TA = TMIN to TMAX -0.35 0.35 nA
TA = +25°C -0.25 ±0.01 0.25
COM_ Off-Leakage Current
(Note 7) ICOM_(OFF)V + = + 5.5V ; V
C OM_ = +1V ,
+ 4.5V ; V
N O_ = +4.5V, + 1V TA = TMIN to TMAX -0.75 0.75 nA
TA = +25°C -0.25 ±0.01 0.25
COM_ On-Leakage Current
(Note 7) ICOM_(ON)
V + = + 5.5V ; V
C OM_ = +1V ,
+ 4.5V ; V
N O_ = +1V , + 4.5V ,
or unconnected TA = TMIN to TMAX -0.75 0.75
nA
DIGITAL I/O
Input Logic High VIH 2.4 V
Input Logic Low VIL 0.8 V
Input Leakage Current IIH, IIL VIN_ = 0 or V+ -0.1 0.005 0.1 µA
Digital Input Capacitance CIN 2pF
DYNAMIC
TA = +25°C1418
Transition Time (Note 7) tTRANS
RL = 100Ω, C
L = 35p F,
V
N O1 = + 3V or 0,
V
N O8 = 0 or + 3V , Fi g ur e 2 TA = TMIN to TMAX 20
ns
MAX4638/MAX4639
3.5
Ω
, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
3
Maxim Integrated
MAX4638/MAX4639
3.5
Ω
, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
ELECTRICAL CHARACTERISTICS—+5V Single Supply (continued)
(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
( N o t e 2 ) MAX UNITS
TA = +25°C8
Break-Before-Make (Note 7) tBBM RL = 100Ω, CL = 35pF,
VNO_ = +3V, Figure 3 TA = TMIN to TMAX 1ns
TA = +25°C1418
Enable Turn-On Time (Note 7) tON
(
EN
)
RL = 100Ω, CL = 35pF,
VNO1 = +3V, VNO2 to
VNO8 = 0, Figure 4 TA = TMIN to TMAX 20
ns
TA = +25°C57
Enable Turn-Off Time (Note 7) tOFF
(
EN
)
RL = 100Ω, CL = 35pF,
VNO1 = +3V, VNO2 to
VNO8 = 0, Figure 4 TA = TMIN to TMAX 8
ns
MAX4638 TA = +25°C50
On-Channel -3dB Bandwidth BW
S i g nal =
0d Bm ,
C
L = 5p F,
50Ω i n and
out, Fi g ur e 6 MAX4639 TA = +25°C85
MHz
Charge Injection Q V
GE N
= + 2.5V , RGE N
= 0,
C
L = 1.0nF, Fig ur e 5 TA = +25°C13pC
NO_ Off-Capacitance CNO_
(
OFF
)
VNO_ = 0V, f = 1MHz,
Figure 8 TA = +25°C9pF
MAX4638 TA = +25°C40
COM_ Off-Capacitance C
C OM_
(
OFF
)
V
C OM_ = 0V ,
f = 1MHz,
Figure 8 MAX4639 TA = +25°C20
pF
MAX4638 TA = +25°C54
Switch On-Capacitance C(ON)
VCOM_ =
VNO_ = 0V,
f = 1MHz,
Figure 8 MAX4639 TA = +25°C34
pF
C
L = 5p F, RL = 50Ω,
f = 1M H z, V
N O_ =
1V
RM S
, Fi g ur e 6
TA = +25°C -55
Off-Isolation (Note 8) VISO C
L = 5p F, RL = 50Ω,
f = 10M H z, V
N O_ =
1V
RM S
, Fi g ur e 6
TA = +25°C -75
dB
C
L
= 5p F, RL
= 50Ω,
f = 10M H z, V
N O_=
1V
RM S
, Fi g ur e 7
TA = +25°C -65
Crosstalk (Note 9) VCT C
L
= 5p F, RL
= 50Ω,
f = 1M H z, V
N O_ =
1V
R M S
, Fi g ur e 7
TA = +25°C -85
dB
Total Harmonic Distortion THD RL = 600Ω,
RFLAT(ON)/RLTA = +25°C 0.5 %
SUPPLY
Positive Supply Current I+ V+ = +5.5V, VIN = 0 or V+ 0.001 1.0 µA
MAX4638/MAX4639
3.5
Ω
, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
4Maxim Integrated
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
( N o t e 2 ) MAX UNITS
ANALOG SWITCH
Analog Signal Range VCOM_,
VNO_ 0V+V
TA = +25°C 4.5 6
On-Resistance RON ICOM_ = 10mA,
VNO_ = +1.7V TA = TMIN to TMAX 8Ω
TA = +25°C 0.25 0.6
On-Resistance Match
Between Channels (Notes 4, 5) ΔRON ICOM_ = 10mA,
VNO_ = +1.7V TA = TMIN to TMAX 0.8 Ω
TA = +25°C12
On-Resistance Flatness (Note 6) RFLAT
(
ON
)
IC OM _ = 10m A;
V
N O_
= + 1.5V , + 1.7V ,
+ 1.9V TA = TMIN to TMAX 2.5
Ω
TA = +25°C -0.25 ±0.01 0.25
NO_ Off-Leakage Current
(Note 7) INO_
(
OFF
)
V+ = +3.3V;
VCOM_
= +1V, +3V; VNO_
= +3V, +1V TA = TMIN to TMAX -0.35 0.35
nA
TA = +25°C -0.25 ±0.01 0.25
COM_ Off-Leakage Current
(Note 7) ICOM_
(
OFF
)
V+ = +3.3V;
VCOM_
= +1V, +3V; VNO_
= +3V, +1V TA = TMIN to TMAX -0.35 0.35
nA
TA = +25°C -0.25 ±0.01 0.25
COM_ On-Leakage Current
(Note 7) ICOM_
(
ON
)
V+ = +3.3V; VCOM_ =
+1V, +3V; VNO_
= +1V,
+3V, or unconnected TA = TMIN to TMAX -0.35 0.35
nA
DIGITAL I/O
Input Logic High VIH 2.0 V
Input Logic Low VIL 0.4 V
Input Leakage Current IIH, IIL VIN_ = 0 or V+ -0.1 0.005 0.1 µA
Digital Input Capacitance CIN 2pF
DYNAMIC
TA = +25°C1620
Transition Time (Note 7) tTRANS VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 2 TA = TMIN to TMAX 24 ns
TA = +25°C8
Break-Before-Make (Note 7) tBBM VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 3 TA = TMIN to TMAX 1ns
TA = +25°C1520
Enable Turn-On Time (Note 7) tON
(
EN
)
VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 4 TA = TMIN to TMAX 24 ns
TA = +25°C59
Enable Turn-Off Time (Note 7) tOFF
(
EN
)
VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 4 TA = TMIN to TMAX 10 ns
MAX4638/MAX4639
3.5
Ω
, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
5
Maxim Integrated
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 SYMBOL CONDITIONS MIN TYP
( N o t e 2 ) MAX UNITS
CL = 5pF, RL = 50Ω,
f = 10MHz,
V
N O_ = + 1V
RM S
, Fi g ur e 6
TA = +25°C55
Off-Isolation (Note 8) VISO CL = 5pF, RL = 50Ω,
f = 1M Hz, VN O_ = 1V
RM S,
Figure 6
TA = +25°C -75
dB
C
L = 5p F, RL = 50Ω,
f = 10MH z, V
N O_ = 1V
RM S,
Figure 7
TA = +25°C -65
Crosstalk (Note 9) VCT C
L = 5p F, RL = 50Ω,
f = 1MH z, VNO_ = 1VRMS,
Fig ur e 7
TA = +25°C -85
dB
MAX4638 TA = +25°C50
On-Channel -3dB Bandwidth BW
Signal =
0dBm, 50Ω in
and out,
Figure 6 MAX4639 TA = +25°C85
MHz
NO_ Off-Capacitance CNO_
(
OFF
)
VNO_ = 0V, f = 1MHz,
Figure 8 TA = +25°C9pF
MAX4638 TA = +25°C40
COM_ Off-Capacitance CC OM _
(
OFF
)
V
C OM _ = 0V ,
f = 1MHz,
Figure 8 MAX4639 TA = +25°C20
pF
MAX4638 TA = +25°C54
Switch On-Capacitance C(ON)
VCOM = VNO_
= 0V,
f = 1MHz,
Figure 8 MAX4639 TA = +25°C34
pF
SUPPLY
Positive Supply Current I+ 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
ANALOG SWITCH
Analog Signal Range VCOM_,
VNO_ V- V+ V
TA= +25°C 2.5 3.5
On-Resistance RON ICOM_ = 10mA, VNO_ =±1.5V,
V+ = +2.25V, V- = -2.25V TA = TMIN to TMAX 4.5
TA= +25°C 0.2 0.4
On-Resistance Match
Between Channels (Notes 4, 5) RON ICOM_ = 10mA, VNO_ =±1.5V,
V+ = +2.25V, V- = -2.25V TA = TMIN to TMAX 0.5
MAX4638/MAX4639
3.5
Ω
, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
6Maxim Integrated
PARAMETER SYMBOL CONDITIONS MIN
TYP
(Note 2) MAX UNITS
TA= +25°C 0.75 1
On-Resistance Flatness
(Note 6) RFLAT(ON) ICOM_ = 10mA; VNO_ =±1.5V,
0; V+ = +2.25V; V- = -2.25V TA = TMIN to TMAX 1.2
TA= +25°C -0.25 ±0.01 0.25
NO_ Off-Leakage
Current (Note 7) INO_ (OFF)
V+ = +2.75V; V- = -2.75V;
VCOM_ = +1V, +2.5V;
VNO_ = +2.5V, +1V TA = TMIN to TMAX -0.35 0.35
nA
TA= +25°C -0.25 ±0.01 0.25
COM_ Off-Leakage
Current (Note 7) ICOM_ (OFF)
V+ = +2.75V; V- = -2.75;
VCOM_ = +1V, +2.5V;
VNO_ = +2.5V, +1V TA = TMIN to TMAX -0.35 0.35
nA
TA= +25°C -0.25 ±0.01 0.25
COM_ On-Leakage
Current (Note 7) ICOM_ (ON)
V+ = +2.5V; V- = -2.5;
VCOM_ = +1V, +2.5V;
VNO_ = +1V, +2.5V,
or unconnected TA = TMIN to TMAX -0.35 0.35
nA
DIGITAL I/O
Input Logic High VIH 2.0 V
Input Logic Low VIL 0.4 V
Input Leakage Current IIH,I
IL V
IN_ = 0 or V+ -0.1 0.005 0.1 μA
Digital Input Capacitance CIN 2 pF
DYNAMIC
TA= +25°C 16 20
Transition Time (Note 7) tTRANS VNO_ = +1.2V, CL = 35pF,
RL= 100, Figure 2 TA = TMIN to TMAX 24
ns
TA= +25°C 14 18
Enable Turn-On Time
(Note 7) tON(EN) VNO_ = +1.2V, CL = 35pF,
RL= 100, Figure 4 TA = TMIN to TMAX 20
ns
TA= +25°C 5 7
Enable Turn-Off Time
(Note 7) tOFF(EN) VNO_ = +1.2V, CL = 35pF,
RL= 100, Figure 4 TA = TMIN to TMAX 8
ns
TA= +25°C 8
Break-Before-Make (Note 7) tBBM VNO_ = +1.2V, CL = 35pF,
RL= 100, Figure 3 TA = TMIN to TMAX 1
ns
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)
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.
MAX4638/MAX4639
3.5
Ω
, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
7
Maxim Integrated
0
5
10
15
20
25
0 2.0 2.51.0 1.50.5 3.0 3.5 4.0 4.5 5.0
ON-RESISTANCE vs. VCOM
MAX4638 toc01
VCOM (V)
RON (Ω)
V+ = +1.8V
V+ = +3V
V+ = +5V
0
1.0
0.5
1.5
3.0
3.5
2.5
2.0
4.0
0 1.0 1.5 2.0 2.50.5 3.0 3.5 4.0 4.5 5.0
ON-RESISTANCE vs. VCOM AND
TEMPERATURE
MAX4638 toc02
VCOM (V)
R0N (Ω)
TA = +85°C
TA = -40°CTA = +25°C
V+ = +5V
0
2
1
4
3
5
6
0 1.0 1.50.5 2.0 2.5 3.0
ON-RESISTANCE vs. VCOM AND
TEMPERATURE
MAX4638 toc03
VCOM (V)
RON (Ω)
TA = +85°C
TA = -40°C
TA = +25°C
V+ = +3V
60
100
80
140
120
180
160
200
1.0 3.02.0 4.0 5.01.5 3.52.5 4.5 5.5 6.0
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX4638 toc04
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (pA)
0
6
4
2
8
10
12
14
16
18
20
-2.5 -0.5 1.5 3.5
CHARGE INJECTION vs. VCOM
MAX4638 toc05
VCOM (V)
CHARGE (pC)
V+ = +5V
V± = ±2.5V
5.5
10
1
0.1
0.01
0.001
-40 10-15 35 60 85
SUPPLY CURRENT
vs. TEMPERATURE
MAX4638 toc06
TEMPERATURE (°C)
SUPPLY CURRENT (nA)
0.6
0.8
1.0
1.2
1.4
1.6
1.8
1.8 2.82.3 3.3 3.8 4.3 4.8 5.3
LOGIC LEVEL THRESHOLD vs.
SUPPLY VOLTAGE AND TEMPERATURE
MAX4638 toc07
SUPPLY VOLTAGE (V)
LOGIC VOLTAGE (V)
TA = +85°C
TA = +25°C
TA = -40°C
0
10
5
25
20
15
40
35
30
45
1.5 3.0 3.52.0 2.5 4.0 4.5 5.0 5.5
ENABLE TURN-ON/TURN-OFF TIME
vs. SUPPLY VOLTAGE
MAX4638 toc08
SUPPLY VOLTAGE (V)
TIME (ns)
tON
tOFF
0
2
4
6
8
10
12
14
16
-40 -15 10 35 60 85
ENABLE TURN-ON/TURN-OFF TIME
vs. TEMPERATURE
MAX4638 toc09
TEMPERATURE (°C)
TIME (ns)
tON
tOFF
Typical Operating Characteristics
(V+ = +5V, V- = 0V, TA= +25°C, unless otherwise noted.)
-120
-80
-100
-40
-60
0
-20
0.01 10.1 10 100 1000
FREQUENCY RESPONSE
MAX4638 toc10
FREQUENCY (MHz)
RESPONSE (dB)
ON-RESPONSE MAX4638
ON-RESPONSE MAX4639
OFF-ISOLATION
CROSSTALK
0.01
0.001
1
0.1
100
10
1000
-40 0-20 20 40 8060
ON/OFF-LEAKAGE CURRENT
vs. TEMPERATURE
MAX4638 toc11
TEMPERATURE (°C)
LEAKAGE CURRENT (pA)
OFF-LEAKAGE
ON-LEAKAGE
0
0.02
0.06
0.04
0.08
0.10
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4638 toc12
FREQUENCY (kHz)
THD (%)
0.01 10.1 10 100
V+ = +2.5V
V- = -2.5V
5Vp-p SIGNAL
600Ω IN AND OUT
Pin Description
PIN
MAX4638 MAX4639
TQFN-EP TQFN-EP
DIP/SO
16-PIN 20-PIN
DIP/SO
16-PIN 20-PIN
NAME FUNCTION
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 Enable
3 1 2 3 1 2 V- Negative-Supply Voltage Input
4–7 2–5 3–6 — — — NO1–N04 Bidirectional Analog Inputs
— — — 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
13 11 14 14 12 14 V+ Positive-Supply Voltage Input
14 12 15 15 13 15 GND Ground
— —
8, 9,
16, 20 — —
8, 16,
18, 20 N.C. No Connection. Not internally
connected.
— — — — — — EP
Exposed Pad (TQFN Only).
Connect EP to V-.
MAX4638/MAX4639
3.5
Ω
, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
8Maxim Integrated
Typical Operating Characteristics (continued)
(V+ = +5V, V- = 0V, TA= +25°C, unless otherwise noted.)
MAX4638/MAX4639
3.5
Ω
, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
9
Maxim Integrated
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 out-
put 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 dis-
abled, all channels are switched off. See Truth Tables.
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. If power-supply sequencing is not possi-
ble, 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
does not affect the devices’ low switch resistance.
Device operation is unchanged, and the difference
between V+ and V- should not exceed 6V. These pro-
tection diodes are not recommended when using a sin-
gle supply. For single-supply operation, V- should be
connected to GND as close to the device as possible.
COM_
V-
V+
NO_
* INTERNAL PROTECTION DIODES
D2
D1
-2.5V
+2.5V
MAX4638
MAX4639
*
*
*
*
Figure 1. Overvoltage Protection Using External Blocking
Diodes
A2 A1 A0 EN ON SWITCH
X X X 0 None
0 0 0 1 NO1
0 0 1 1 NO2
0 1 0 1 NO3
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
A1 A0 EN COMA COMB
X X 0 None None
0 0 1 NO1A NO1B
0 1 1 NO2A NO2B
1 0 1 NO3A NO3B
1 1 1 NO4A NO4B
MAX4638 (Single 8-to-1 Mux) MAX4639 (Dual 4-to-1 Mux)
Truth Tables
MAX4638/MAX4639
3.5
Ω
, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
10 Maxim Integrated
Test Circuits/Timing Diagrams
50%
tR < 5ns
tF < 5ns
+3V
0V
VN01
ADDRESS
INPUT
VIN
SWITCH
OUTPUT
VOUT
V+
VOUT
V-
GND
V+
A1
V-
A0
A2
EN
NO1
NO2–NO7
NO8
COM
VNO1
VNO8
50Ω
MAX4638
100Ω35pF
90% 10%
tTRANS
V+
VOUT
V-
GND
V+
A1
V-
A0
EN
NO1B
VNO8
NO1A–NO4A
COMB
VNO1
50Ω
MAX4639
100Ω35pF
VIH
VIH
VIN
VIN
NO4B tTRANS
VN08
Figure 2. Transition Time
50%
tBBM
tR < 5ns
tF < 5ns
VN0_
+3V
0V
ADDRESS
INPUT
VA
SWITCH
OUTPUT
VOUT
V+
V-
GND
V+
A0
V-
A1
A2
EN
50Ω
MAX4638
90%
0V
VA
VIH VNO1
NO1
NO8 VNO8
COM VOUT
NO2–NO7
100Ω
35pF
Figure 3. MAX4638 Break-Before-Make Interval
MAX4638/MAX4639
3.5
Ω
, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
11
Maxim Integrated
50%
90%
tR < 5ns
tF < 5ns
VOUT
+3V
0V
VNO1
0V
LOGIC
INPUT
VEN
SWITCH
OUTPUT
V+
V-
GND
V+
A1
V-
A0
A2
EN NO1
NO2–NO8
COM
50Ω
MAX4638
100Ω
35pF
V+
VOUT
V-
GND
V+
V-
NO1B
NO_, COMA
COMB
VNO1
VEN
MAX4639
100Ω
35pF
tOFF(EN)
90%
VOUT
VNO1
A0
A1
EN
50Ω
VEN
tON(EN)
Figure 4. Enable Switching Time
Figure 5. Charge Injection
ΔVOUT
+3V
0V
LOGIC
INPUT
VEN
V+
VOUT
V-
GND
V+
A1
V-
A0
A2
EN
COM
MAX4638
MAX4639
CL
1nF VOUT
NO_
CHANNEL
SELECT
RS
VS
OFF OFFOFF ON ON ON
ΔVOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
Q = ΔVOUT ✕ CL
VEN
Test Circuits/Timing Diagrams (continued)
MAX4638/MAX4639
3.5
Ω
, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
12 Maxim Integrated
V+
VOUT
V-
GND
V+
A1
V-
A0
A2
NO8
COM
MAX4638
MAX4639
NO1
RS = 50Ω
VIN
EN
1μF
RL
50Ω
CL
5pF
OFF-ISOLATION = 20log VOUT
VIN
VEN
Figure 7. Crosstalk
V+
VOUT
V-
GND
V+
A1
V-
A0
A2
NO8
COM
MAX4638
MAX4639
NO2
RG = 50Ω
VIN
EN
1μF
RL
50Ω
CL
5pF
NO1
R
50Ω
CROSSTALK = 20log VOUT
VIN
VEN
1μF
Figure 8. Channel Off/On-Capacitance
V+
V-
GND
V+
A2
V-
A1
A0
NO8
MAX4638
MAX4639
CHANNEL
SELECT
NO1
COM
EN
1MHz
CAPACITANCE
ANALYZER
f = 1MHz
VEN
Test Circuits/Timing Diagrams (continued)
Figure 6. Off-Isolation/On-Channel Bandwidth
MAX4638/MAX4639
3.5
Ω
, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
13
Maxim Integrated
Chip Information
PROCESS: BiCMOS
16
15
14
13
EN
A0
A1
A2
9
EP*
*CONNECT EP TO V-
*CONNECT EP TO V-
EP*
EP* EP*
10
11
12
NO6
NO5
V+
GND
4
3
2
1
NO3
NO2
NO1
V-
5
6
7
8
NO4
COM
NO8
NO7
MAX4638
16
15
14
13
EN
A0
A1
GND
9
10
11
12
NO3B
NO2B
NO1B
V+
4
3
2
1
NO3A
NO2A
NO1A
V-
5
6
7
8
NO4A
COMA
COMB
NO4B
MAX4639
TOP VIEW
20
19
18
17
N.C.
A0
A1
A2
16 N.C.
13
12
11
14
15
NO6
NO5
V+
GND
NO7
4
3
2
1
++
++
NO2
NO1
V-
EN
5NO3
6
7
8
9
NO4
COM
N.C.
N.C.
10NO8
MAX4638
TQFN
20
19
18
17
N.C.
A0
N.C.
A1
16 N.C.
13
12
11
14
15
NO2B
NO1B
V+
GND
NO3B
4
3
2
1
NO2A
NO1A
V-
EN
5NO3A
6
7
8
9
NO4A
COMA
N.C.
COMB
10NO4B
MAX4639
TQFN
TQFN TQFN
Pin Configurations (continued)
Ordering Information (continued)
PART TEMP RANGE PIN-PACKAGE
MAX4639ETE+T -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)
+
Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*
EP = Exposed pad.
Package Information
For the latest package outline information and land patterns (foot-
prints), 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 T1644+4 21-0139 90-0070
20 TQFN T1644+3 21-0139 90-0069
16 TSSOP U16+2 21-0066 90-0117
16 SO S16+3 21-0041 90-0097
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
© 2012 Maxim Integrated Products, Inc. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
MAX4638/MAX4639
3.5
Ω
, Single 8:1 and Dual 4:1,Z
Low-Voltage Analog Multiplexers
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
2 9/10 — —
3 10/12 Added RoHS ordering information throughout data sheet 1–16
