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 thin QFN, TSSOP, and SO packages,
as well as a 20-pin thin QFN 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)
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
________________________________________________________________ Maxim Integrated Products 1
19-1782; Rev 2; 2/04
Ordering Information
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
PART TEMP RANGE PIN-PACKAGE
MAX4638ETE
-40°C to +85°C
16 Thin QFN (4 ✕ 4)
MAX4638EUE
-40°C to +85°C16 TSSOP
MAX4638ESE
-40°C to +85°C16 SO
MAX4638ETP
-40°C to +85°C
20 Thin QFN (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
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.
Ordering Information continued at end of data sheet.
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
2_______________________________________________________________________________________
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.) (Note 9)
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)
16-Pin Thin QFN (derate 16.9mW/°C above +70°C)....1349mW
16-Pin TSSOP (derate 5.7mW/°C above +70°C)............457mW
16-Pin SO (derate 8.70mW/°C above +70°C) ...............696mW
20-Pin Thin QFN (derate 16.9mW/°C above +70°C)....1349mW
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
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
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 3, 8) ∆RON
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 4)
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 5)
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 5)
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 5)
ICOM_
(
ON
)
V + = + 5.5V ; V
C OM_ = +1V ,
+ 4.5V ; V
N O_ = +1V , + 4.5V ,
or fl oati ng
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 5)
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
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
_______________________________________________________________________________________ 3
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.) (Note 9)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
(
N o t e 2
)
MAX
UNITS
TA = +25°C8
Break-Before-Make (Note 5) tBBM
RL = 100Ω, CL = 35pF,
VNO_ = +3V, Figure 3
TA = TMIN to TMAX
1ns
TA = +25°C1418
Enable Turn-On Time (Note 5)
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 5)
tOFF
(
EN
)
RL = 100Ω, CL = 35pF,
VNO1 = +3V, VNO2 to
VNO8 = 0, Figure 4
TA = TMIN to TMAX
8ns
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 6) 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 7) 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
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
4_______________________________________________________________________________________
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.) (Note 9)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
(
No te 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 3, 8) ∆RON ICOM_ = 10mA,
VNO_ = +1.7V TA = TMIN to TMAX 0.8 Ω
TA = +25°C12
On-Resistance Flatness (Note 4)
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 5)
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 5)
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 5)
ICOM_
(
ON
)
V+ = +3.3V; VCOM_
= +1V, +3V; VNO_
=
+1V, +3V, or floating
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 5)
tTRANS
VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 2
TA = TMIN to TMAX
24 ns
TA = +25°C8
Break-Before-Make (Note 5) tBBM
VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 3
TA = TMIN to TMAX
1ns
TA = +25°C1520
Enable Turn-On Time (Note 5)
tON
(
EN
)
VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 4
TA = TMIN to TMAX
24 ns
TA = +25°C59
Enable Turn-Off Time (Note 5)
tOFF
(
EN
)
VNO_ = +2V, CL = 35pF,
RL = 100Ω, Figure 4
TA = TMIN to TMAX
10 ns
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
_______________________________________________________________________________________ 5
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.) (Note 9)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
(
No te 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 6) 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 7) 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
1µA
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.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
(
N o t e 2
)
MAX
UNITS
ANALOG SWITCH
Analog Signal Range VCOM_,
VNO_ V- V+ V
TA = +25°C 2.5 3.5
On-Resistance RON
ICOM_ = 10m A, VNO_ = ±1.5V,
V + = + 2.25V, V - = -2.25V
TA = TMIN to TMAX
4.5 Ω
TA = +25°C 0.2 0.4
On-Resistance Match
Between Channels (Notes 3, 8) ∆RON
ICOM_ = 10m A, VNO_ = ±1.5V,
V + = + 2.25V , V - = - 2.25V
TA = TMIN to TMAX
0.5 Ω
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
(
N o t e 2
)
MAX
UNITS
TA = +25°C
0.75
1
On-Resistance Flatness
(Note 4)
RFLAT
(
ON
)
IC OM_ = 10m A; V
N O_ = ±1.5V ,
0; V + = + 2.25V ; V - = - 2.25V TA = TMIN to TMAX
1.2 Ω
TA = +25°C
-0.25 ±0.01 0.25
NO_ Off-Leakage
Current (Note 5)
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 5)
ICOM_
(
OFF
)
V + = + 2.75V; V - = -2.75;
V
C OM_ = +1V , + 2.5V ;
V
N O_ = +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 5)
ICOM_
(
ON
)
V + = + 2.5V ; V - = - 2.5;
V
C OM _ = + 1V , + 2.5V ;
V
NO_ = + 1V , + 2.5V , or
fl oati ng
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°C 16 20
Transition Time (Note 5)
tTRANS VNO_ = +1.2V, CL = 35pF,
RL = 100Ω, Figure 2
TA = TMIN to TMAX
24 ns
TA = +25°C 14 18
Enable Turn-On Time
(Note 5)
tON
(
EN
)
V
N O_
= + 1.2V , C
L = 35p F,
RL = 100Ω, Figure 4
TA = TMIN to TMAX
20 ns
TA = +25°C 5 7
Enable Turn-Off Time
(Note 5)
tOFF
(
EN
)
V
N O_ = +1.2V, C
L = 35p F,
RL = 100Ω, Figure 4
TA = TMIN to TMAX
8ns
TA = +25°C 8
Break-Before-Make (Note 5) tBBM
V
N O_ = + 1.2V , C
L = 35p F,
RL = 100Ω, Figure 3
TA = TMIN to TMAX
1ns
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.)
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: ∆RON = RON(MAX) - RON(MIN).
Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal ranges.
Note 5: Guaranteed by design.
Note 6: Off-Isolation = 20log10 (VCOM_ / VNO_), VCOM_ = output, VNO_ = input to off switch.
Note 7: Between any two switches.
Note 8: ∆RON matching specifications for thin QFN packaged parts are guaranteed by design.
Note 9: Parts are tested at +85°C and guaranteed by design over the entire temperature range.
6______________________________________________________________________________________
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
_______________________________________________________________________________________ 7
0
5
10
15
20
25
02.02.51.0 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
01.01.5 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
01.01.50.5 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 6085
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- = 0, TA= +25°C, unless otherwise noted.)
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
-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
THIN QFN THIN QFN
DIP/SO
16-PIN 20-PIN DIP/SO
16-PIN 20-PIN
NAME FUNCTION
1, 15, 16
15, 14, 13 19, 18, 17
———A0, A2, A1 Address Inputs
———1, 16 15, 14 19, 17 A0, A1 Address Inputs
21612161 EN Enable
3123 12 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
867——— 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.
—EPEP— EP EP PAD Exposed Pad. Connect to V-.
8_______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V+ = +5V, V- = 0, TA= +25°C, unless otherwise noted.)
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
_______________________________________________________________________________________ 9
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
XX X0 None
00 0 1 NO1
00 1 1 NO2
01 0 1 NO3
01 1 1 NO4
10 0 1 NO5
10 1 1 NO6
11 0 1 NO7
11 1 1 NO8
A1 A0 EN COMA COMB
XX 0None None
00 1NO1A NO1B
01 1NO2A NO2B
10 1NO3A NO3B
11 1NO4A NO4B
MAX4638 (Single 8-to-1 Mux) MAX4639 (Dual 4-to-1 Mux)
Truth Tables
Ordering Information (continued)
PART TEMP RANGE PIN-PACKAGE
MAX4639ETE
-40°C to +85°C
16 Thin QFN (4 ✕ 4)
MAX4639EUE
-40°C to +85°C16 TSSOP
MAX4639ESE
-40°C to +85°C16 SO
MAX4639ETP
-40°C to +85°C
20 Thin QFN (4 ✕ 4)
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
10 ______________________________________________________________________________________
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
50ΩMAX4638
100Ω35pF
90% 10%
tTRANS
V+
VOUT
V-
GND
V+
A1
V-
A0
EN
NO1B
VNO8
NO1A–NO4A
COMB
VNO1
50ΩMAX4639
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
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
______________________________________________________________________________________ 11
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
∆VOUT
+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
∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
Q = ∆VOUT ✕ CL
VEN
Test Circuits/Timing Diagrams (continued)
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
12 ______________________________________________________________________________________
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)
Chip Information
TRANSISTOR COUNT: 632
Figure 6. Off-Isolation/On-Channel Bandwidth
Note: Exposed pad on thin QFN packages is connected to V-.
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
______________________________________________________________________________________ 13
16
15
14
13
EN
A0
A1
A2
9
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
THIN QFN
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
THIN QFN
THIN QFN THIN QFN
Pin Configurations (continued)
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
14 ______________________________________________________________________________________
TSSOP4.40mm.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.)
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
______________________________________________________________________________________ 15
Package Information (continued)
(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.)
24L QFN THIN.EPS
C
1
2
21-0139
PACKAGE OUTLINE
12, 16, 20, 24L THIN QFN, 4x4x0.8mm
C
2
2
21-0139
PACKAGE OUTLINE
12, 16, 20, 24L THIN QFN, 4x4x0.8mm
MAX4638/MAX4639
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
SOICN .EPS
PACKAGE OUTLINE, .150" SOIC
1
1
21-0041 B
REV.DOCUMENT CONTROL NO.APPROVAL
PROPRIETARY INFORMATION
TITLE:
TOP VIEW
FRONT VIEW
MAX
0.010
0.069
0.019
0.157
0.010
INCHES
0.150
0.007
E
C
DIM
0.014
0.004
B
A1
MIN
0.053A
0.19
3.80 4.00
0.25
MILLIMETERS
0.10
0.35
1.35
MIN
0.49
0.25
MAX
1.75
0.050
0.016L0.40 1.27
0.3940.386D
D
MINDIM
D
INCHES
MAX
9.80 10.00
MILLIMETERS
MIN MAX
16 AC
0.337 0.344 AB8.758.55 14
0.189 0.197 AA5.004.80 8
NMS012
N
SIDE VIEW
H0.2440.228 5.80 6.20
e0.050 BSC 1.27 BSC
C
HE
eBA1
A
D
0∞-8∞
L
1
VARIATIONS:
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 _____________________16
©2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
Package Information (continued)
(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.)