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19-1782; Rev 1; 3/02
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 fea-
ture 3.5Ω on-resistance (R
ON
) when powered with a
single +5V supply and have -75dB of off-isolation and
-85dB crosstalk from the output to each off channel.
The switching times are 18ns t
ON
and 7ns t
OFF
. 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 QFN, TSSOP and SOIC packages,
as well as a 20-pin QFN package.
Features
o
Guaranteed R
ON
3.5Ω (+5V or ±2.5V Supplies)
6Ω (+3V Supply)
o
Guaranteed 0.4Ω R
ON
Match Between Channels
o
Guaranteed 1Ω R
ON
Flatness Over Signal Range
o
Guaranteed Low Leakage Currents
0.25nA at +25°C
o
Switching Times: t
ON
= 18ns, t
OFF
= 7ns
o
+1.8V to +5.5V Single-Supply Operation
±2.5V Dual-Supply Operation
o
Rail-to-Rail Signal Handling
o
TTL/CMOS-Logic Compatible
o
Crosstalk: -80dB (1MHz)
o
Off-Isolation: -60dB (10MHz)
MAX4638/MAX4639
Applications
Automatic Test Equipment
Low-Voltage Data-Acquisition Systems
Audio and Video Signal Routing
Medical Equipment
Battery-Powered Equipment
Relay Replacement
PART
MAX4638EGE
MAX4638EUE
MAX4638ESE
MAX4638EGP
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 QFN (4
✕
4)
16 TSSOP
16 SO
20 QFN (4
✕
4)
Ordering Information continued at end of data sheet.
Pin Configurations/Functional Diagrams
TOP VIEW
MAX4638
A0 1
EN 2
V- 3
NO1 4
NO2 5
NO3 6
NO4 7
COM 8
LOGIC
16 A1
15 A2
14 GND
13 V+
12 NO5
11 NO6
10 NO7
9
NO8
A0 1
EN 2
V- 3
NO1A 4
NO2A 5
NO3A 6
NO4A 7
COMA 8
MAX4639
16 A1
15 GND
LOGIC
14 V+
13 NO1B
12 NO2B
11 NO3B
10 NO4B
9
COMB
TSSOP/SO
Rail-to-Rail is a Registered Trademark of Nippon Motorola, Ltd.
TSSOP/SO
________________________________________________________________
Maxim Integrated Products
1
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.
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
MAX4638/MAX4639
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_ (Note1) .................................... -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 (T
A
= +70°C)
16-Pin QFN (derate 18.5mW/°C above +70°C) ........ 1481mW
16-Pin TSSOP (derate 5.7mW/°C above +70°C) ........ 457mW
16-Pin SO (derate 8.70mW/°C above +70°C) ............ 696mW
20-Pin QFN (derate 20mW/°C above +70°C) .......... 1600mW
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.
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, V
IH
= +2.4V, V
IL
= +0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
ANALOG SWITCH
Analog Signal Range
On-Resistance
On-Resistance Match
Between Channels (Notes 3, 8)
On-Resistance Flatness (Note 4)
NO_ Off-Leakage Current
(Note 5)
COM_ Off-Leakage Current
(Note 5)
COM_ On-Leakage Current
(Note 5)
DIGITAL I/O
Input Logic High
Input Logic Low
Input Leakage Current
Digital Input Capacitance
DYNAMIC
Transition Time (Note 5)
t
TRANS
RL = 100Ω, C
L
= 35pF,
V
NO1
= +3V or 0,
V
NO8
= 0 or +3V, Figure 2
T
A
= +25°C
T
A
= T
MIN
to T
MAX
14
18
ns
20
V
IH
V
IL
I
IH
, I
IL
C
IN
V
IN_
= 0 or V+
-0.1
0.005
2
2.4
0.8
0.1
V
V
µA
pF
V
COM_
,
V
NO_
R
ON
∆R
ON
R
FLAT(ON)
I
NO_(OFF)
I
COM_(OFF)
V+ = +4.5V, I
COM_
= 10mA, T
A
= +25°C
V
NO_
= +3.5V
T
A
= T
MIN
to T
MAX
V+ = +4.5V, I
COM_
= 10mA, T
A
= +25°C
V
NO_
= +3.5V
T
A
= T
MIN
to T
MAX
V+ = +4.5V; I
COM_
= 10mA; T
A
= +25°C
V
NO_
= +1V, +2V, +3.5V
T
A
= T
MIN
to T
MAX
V+ = +5.5V; V
COM _
= +1V, T
A
= +25°C
+4.5V; V
NO_
= +4.5V, +1V
T
A
= T
MIN
to T
MAX
V+ = +5.5V; V
COM_
= +1V,
+4.5V; V
NO_
= +4.5V, +1V
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
0
2.5
0.1
0.75
-0.25
-0.35
-0.25
-0.75
-0.25
-0.75
±0.01
±0.01
±0.01
V+
3.5
4.5
0.4
0.5
1
1.2
0.25
0.35
0.25
0.75
0.25
nA
0.75
V
Ω
Ω
Ω
nA
nA
SYMBOL
CONDITIONS
MIN
TYP
(Note 2)
MAX
UNITS
V+ = +5.5V; V
COM_
= +1V,
I
COM_(ON)
+4.5V; V
NO_
= +1V, +4.5V,
or floating
2
_______________________________________________________________________________________
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
ELECTRICAL CHARACTERISTICS—+5V Single Supply (continued)
(V+ = +5V ±10%, V- = 0, V
IH
= +2.4V, V
IL
= +0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Break-Before-Make (Note 5)
SYMBOL
t
BBM
CONDITIONS
R
L
= 100Ω, C
L
= 35pF,
V
NO_
= +3V, Figure 3
R
L
= 100Ω, C
L
= 35pF,
V
NO1
= +3V, V
NO2
to
V
NO8
= 0, Figure 4
R
L
= 100Ω, C
L
= 35pF,
V
NO1
= +3V, V
NO2
to
V
NO8
= 0, Figure 4
Signal =
0dBm,
C
L
= 5pF,
50Ω in and
out, Figure 6
MAX4638
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
50
MHz
MAX4639
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
85
13
9
40
pF
MAX4639
MAX4638
MAX4639
20
54
pF
34
pC
pF
5
1
14
18
ns
20
7
ns
8
MIN
TYP
(Note 2)
8
MAX
UNITS
ns
MAX4638/MAX4639
Enable Turn-On Time (Note 5)
t
ON(EN)
Enable Turn-Off Time (Note 5)
t
OFF(EN)
On-Channel -3dB Bandwidth
BW
Charge Injection
NO_ Off-Capacitance
Q
C
NO_(OFF)
V
GEN
= +2.5V, R
GEN
= 0,
C
L
= 1.0nF, Figure 5
V
NO_
= 0V, f = 1MHz,
Figure 8
MAX4638
COM_ Off-Capacitance
V
COM_
= 0V,
C
COM_(OFF)
f = 1MHz,
Figure 8
V
COM_
=
V
NO_
= 0V,
f = 1MHz,
Figure 8
Switch On-Capacitance
C
(ON)
C
L
= 5pF, R
L
= 50Ω,
f = 1MHz, V
NO_
=
1V
RMS
, Figure 6
Off-Isolation (Note 6)
V
ISO
C
L
= 5pF, R
L
= 50Ω,
f = 10MHz, V
NO
_ =
1V
RMS
, Figure 6
C
L
= 5pF, R
L
= 50Ω,
f = 10MHz, V
NO
_=
1V
RMS
, Figure 7
C
L
= 5pF, R
L
= 50Ω,
f = 1MHz, V
NO
_ =
1V
RMS
, Figure 7
R
L
= 600Ω,
R
FLAT(ON)
/R
L
V+ = +5.5V, V
IN
= 0 or V+
T
A
= +25°C
-55
dB
T
A
= +25°C
-75
T
A
= +25°C
-65
dB
Crosstalk (Note 7)
V
CT
T
A
= +25°C
-85
Total Harmonic Distortion
SUPPLY
Positive Supply Current
THD
T
A
= +25°C
0.5
%
I+
0.001
1.0
µA
_______________________________________________________________________________________
3
3.5Ω, Single 8:1 and Dual 4:1,
Low-Voltage Analog Multiplexers
MAX4638/MAX4639
ELECTRICAL CHARACTERISTICS—+3.0V Single Supply
(V+ = +2.7V to +3.3V, V- = 0, V
IH
= +2.0V, V
IL
= +0.4V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V+ = +3V
and T
A
= +25°C.)
PARAMETER
ANALOG SWITCH
Analog Signal Range
On-Resistance
On-Resistance Match
Between Channels (Notes 3, 8)
On-Resistance Flatness (Note 4)
V
COM_
,
V
NO_
R
ON
∆R
ON
I
COM_
= 10mA,
V
NO_
= +1.7V
I
COM_
= 10mA,
V
NO_
= +1.7V
I
COM_
= 10mA;
V
NO_
= +1.5V, +1.7V,
+1.9V
V+ = +3.3V;
V
COM_
= +1V, +3V;
V
NO_
= +3V, +1V
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
-0.25
-0.35
-0.25
-0.35
-0.25
-0.35
±0.01
±0.01
±0.01
1
0.25
0
4.5
V+
6
8
0.6
0.8
2
2.5
0.25
nA
0.35
0.25
nA
0.35
0.25
nA
0.35
V
Ω
Ω
Ω
SYMBOL
CONDITIONS
MIN
TYP
(Note 2 )
MAX
UNITS
R
FLAT(ON)
NO_ Off-Leakage Current
(Note 5)
COM_ Off-Leakage Current
(Note 5)
COM_ On-Leakage Current
(Note 5)
DIGITAL I/O
Input Logic High
Input Logic Low
Input Leakage Current
Digital Input Capacitance
DYNAMIC
Transition Time (Note 5)
Break-Before-Make (Note 5)
Enable Turn-On Time (Note 5)
Enable Turn-Off Time (Note 5)
I
NO_(OFF)
V+ = +3.3V;
I
COM_(OFF)
V
COM_
= +1V, +3V;
V
NO_
= +3V, +1V
V+ = +3.3V; V
COM_
I
COM_(ON)
= +1V, +3V; V
NO_
=
+1V, +3V, or floating
V
IH
V
IL
I
IH
, I
IL
C
IN
V
IN_
= 0 or V+
2.0
0.4
-0.1
0.005
2
V
NO_
= +2V, C
L
= 35pF,
R
L
= 100Ω, Figure 2
V
NO_
= +2V, C
L
= 35pF,
R
L
= 100Ω, Figure 3
V
NO_
= +2V, C
L
= 35pF,
R
L
= 100Ω, Figure 4
V
NO_
= +2V, C
L
= 35pF,
R
L
= 100Ω, Figure 4
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
5
1
15
20
24
9
10
8
16
20
24
0.1
V
V
µA
pF
t
TRANS
t
BBM
t
ON(EN)
t
OFF(EN)
ns
ns
ns
ns
4
_______________________________________________________________________________________
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