19-1709; Rev 2; 5/03
Fast, Low-Voltage, Dual 4Ω SPDT
CMOS Analog Switches
General Description
The MAX4635/MAX4636 are fast, dual 4Ω single-
pole/double-throw (SPDT) analog switches that operate
with supply voltages from +1.8V to +5.5V. High switch-
ing speeds, 1Ω on-resistance flatness, and low power
consumption make these devices ideal for audio/video,
communications, and battery-operated devices.
Containing two independently controllable SPDT
switches in 10-pin µMAX and 10-pin 3mm x 3mm thin
QFN packages, the MAX4635/MAX4636 use little board
space, and have low power consumption ensuring min-
imal impact on your power budget. The analog signal
range extends to the supply rails. The MAX4635 has
inverted logic compared to the MAX4636.
Features
o
Guaranteed On-Resistance
4Ω (max) +5V Supply
5.5Ω (max) +3V Supply
o
Guaranteed Match Between Channels
0.2Ω (max)
o
Guaranteed Flatness Over Signal Range
1Ω (max) with +5V Supply
o
Fast Switching Speeds
14ns (max) Turn-On Time
6ns (max) Turn-Off Time
o
1.8V Operation
100Ω (typ) On-Resistance Over Temperature
56ns (typ) Turn-On Time
17ns (typ) Turn-Off Time
o
+1.8V to +5.5V Single-Supply Operation
o
Rail-to-Rail
®
Signal Handling
o
Low Crosstalk: -67dB at 1MHz
o
High Off-Isolation: -65dB at 1MHz
o
THD: 0.1%
MAX4635/MAX4636
________________________Applications
Battery-Powered Equipment
Relay Replacement
Audio and Video Signal Routing
Low-Voltage Data-Acquisition Systems
Sample-and-Hold Circuits
Communications Circuits
Ordering Information
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
10 µMAX
10 Thin
QFN (3
✕
3)
10 µMAX
10 Thin
QFN (3
✕
3)
TOP
MARK
—
AAT
—
AAO
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
MAX4635EUB
MAX4635ETB
MAX4636EUB
MAX4636ETB
Pin Configuration/Functional Diagram/Truth Table
TOP VIEW
IN1 1
NO1 2
GND 3
NO2 4
IN2 5
10 COM1 IN1 1
9 NC1
NC1 2
GND 3
NC2 4
10 COM1 IN1 1
9 NO1
NO1 2
GND 3
NO2 4
10 COM1 IN1 1
9 NC1
NC1 2
GND 3
NC2 4
10 COM1
9 NO1
MAX4635
8 V+
7 NC2
MAX4636
8 V+
7 NO2
MAX4635
8 V+
7 NC2
MAX4636
8 V+
7 NO2
6 COM2
6 COM2 IN2 5
6 COM2 IN2 5
6 COM2 IN2 5
µMAX
µMAX
IN_
0
1
3 x 3 THIN QFN
NO_ TO COM_ NC_ TO COM_
OFF
ON
ON
OFF
3 x 3 THIN QFN
SWITCHES SHOWN FOR "0" INPUT
________________________________________________________________
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.
Fast, Low-Voltage, Dual 4Ω SPDT
CMOS Analog Switches
MAX4635/MAX4636
ABSOLUTE MAXIMUM RATINGS
(Voltages Referenced to GND)
V+, IN_ .....................................................................-0.3V to +6V
COM_, NC_, NO_ (Note 1) .......................... -0.3V to (V+ + 0.3V)
Continuous Current into Any Terminal .............................±30mA
Peak Current into COM_, NC_, NO_
(pulsed at 1ms, 10% duty cycle).................................±100mA
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMAX (derate 4.7mW/°C above +70°C) ............330mW
10-Pin Thin QFN (derate 24.4mW/°C above +70°C) ..1951mW
Operating Temperature Range .......................... -40°C to +85°C
Storage Temperature Range ........................... -65°C to +150°C
Lead Temperature (soldering, 10s) ............................... +300°C
Note 1:
Signals on NO_, NC_, or COM_ exceeding V+ or GND are clamped by internal diodes. Limit forward-diode current to maxi-
mum 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—Single +5V Supply
(V+ = +4.5V to +5.5V, 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.)
(Notes 2, 9)
PARAMETER
ANALOG SWITCH
Analog Signal Range
V
COM_
,
V
NO_
,
V
NC_
R
ON
∆R
ON
R
FLAT(ON)
I
NC_(OFF)
,
I
NO_(OFF)
V+ = 4.5V, I
COM_
= 10mA,
V
NO_
or V
NC_
= 0 to V+
V+ = 4.5V, I
COM_
= 10mA,
V
NO_
or V
NC_
= 0 to V+
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
0.5
±0.01
0.1
0
2.5
V+
4
4.5
0.2
0.4
1
1.2
-0.1
-0.3
-0.1
-0.3
-0.1
-0.3
±0.01
±0.01
0.1
nA
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
0.3
0.1
nA
0.3
0.1
nA
0.3
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
On-Resistance
On-Resistance Match
Between Channels (Notes 3, 4)
On-Resistance Flatness
(Note 5)
NO_, NC_ Off-Leakage Current
(Note 6)
COM_ Off-Leakage Current
(Note 6)
COM_ On-Leakage Current
(Note 6)
DIGITAL I/O (IN1, IN2)
Input Logic High
Input Logic Low
Input Leakage Current
Ω
Ω
Ω
V+ = 4.5V, I
COM_
= 10mA, T
A
= +25°C
V
NO_
or V
NC_
= 0 to V+
T
A
= T
MIN
to T
MAX
V+ = 5.5V; V
COM_
= 1V,
4.5V; V
NO_
or V
NC_
= 4.5V,
1V
T
A
= +25°C
V+ = 5.5V; V
COM_
= 1V,
I
COM_(OFF)
4.5V; V
NO_
or V
NC_
= 4.5V,
1V
I
COM_(ON)
V+ = 5.5V; V
COM_
= 4.5V,
1V; V
NO_
or V
NC_
= 4.5V,
1V or floating
V
IH
V
IL
I
IH
, I
IL
V
IN_
= 0 or +5.5V
2.4
0.8
-100
5
100
V
V
nA
2
_______________________________________________________________________________________
Fast, Low-Voltage, Dual 4Ω SPDT
CMOS Analog Switches
ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)
(V+ = +4.5V to +5.5V, 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.)
(Notes 2, 9)
PARAMETER
DYNAMIC
Turn-On Time
(Note 6)
Turn-Off Time
(Note 6)
Break-Before-Make Time
(Note 6)
Charge Injection
NO_, NC_ Off-Capacitance
COM_ On-Capacitance
Off-Isolation (Note 7)
Crosstalk (Note 8)
Total Harmonic Distortion
SUPPLY
Positive Supply Current
I+
V+ = 5.5V, V
IN_
= 0 or V+
0.001
1.0
µA
t
ON
V
NO_
, V
NC_
= 3V;
R
L
= 300Ω, C
L
= 35pF,
Figure 1a
V
NO_
, V
NC_
= 3V;
R
L
= 300Ω, C
L
= 35pF,
Figure 1a
V
NO_
, V
NC_
= 3V;
R
L
= 300Ω, C
L
= 35pF,
Figure 1b
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
1
2
9
32
-52
-65
-66
-67
0.1
pC
pF
pF
dB
dB
%
7
ns
5
12
14
ns
16
6
ns
8
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX4635/MAX4636
t
OFF
t
BBM
Q
V
GEN
= 2V, R
GEN
= 0, C
L
= 1.0nF, Figure 2
C
NO_(OFF)
,
V
NO_
, V
NC_
= GND, f = 1MHz, Figure 3
C
NC_(OFF)
C
COM_(ON)
V
COM_
= GND, f = 1MHz, Figure 3
V
ISO
V
CT
THD
C
L
= 5pF, R
L
= 50Ω, f = 10MHz, Figure 4
C
L
= 5pF, R
L
= 50Ω, f = 1MHz, Figure 4
C
L
= 5pF, R
L
= 50Ω, f = 10MHz, Figure 4
C
L
= 5pF, R
L
= 50Ω, f = 1MHz, Figure 4
R
L
= 600Ω, V
NO_
= 5V
P-P
, f = 20Hz to 20kHz
ELECTRICAL CHARACTERISTICS—Single +3V Supply
(V+ = +2.7V to +3.6V, V
IH
= +2.0V, V
IL
= +0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
(Notes 2, 9)
PARAMETER
ANALOG SWITCH
Analog Signal Range
SYMBOL
V
COM_
,
V
NO_
,
V
NC_
R
ON
∆R
ON
R
FLAT(ON)
I
NO_(OFF),
I
NC_(OFF)
ICOM_(OFF)
CONDITIONS
MIN
TYP
MAX
UNITS
0
V+ = 2.7V, I
COM_
= 10mA,
V
NO_
or V
NC_
= 0 to V+
V+ = 2.7V, I
COM_
= 10mA,
V
NO_
or V
NC_
= 0 to V+
V+ = 2.7V, I
COM_
= 10mA,
V
NO_
or V
NC_
= 0 to V+
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
-0.1
-0.3
-0.1
-0.3
±0.01
±0.01
1.5
0.1
5
V+
5.5
8
0.2
0.4
2
2.5
0.1
0.3
0.1
0.3
V
On-Resistance
On-Resistance Match Between
Channels (Notes 3, 4)
On-Resistance Flatness
(Note 5)
NO_, NC_ Off-Leakage Current
(Note 6)
COM_ Off-Leakage Current
(Note 6)
Ω
Ω
Ω
nA
nA
V+ = 3.3V; V
COM_
= 1V, 3V; T
A
= +25°C
V
NO_
or V
NC_
= 3V, 1V
T
A
= T
MIN
to T
MAX
V+ = 3.3V; V
COM_
= 1V, 3V; T
A
= +25°C
V
NO_
or V
NC_
= 3V, 1V
T
A
= T
MIN
to T
MAX
_______________________________________________________________________________________
3
Fast, Low-Voltage, Dual 4Ω SPDT
CMOS Analog Switches
MAX4635/MAX4636
ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued)
(V+ = +2.7V to +3.6V, V
IH
= +2.0V, V
IL
= +0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
(Notes 2, 9)
PARAMETER
COM_ On-Leakage Current
(Note 6)
DIGITAL I/O (IN1, IN2)
Input Logic High
Input Logic Low
Input Leakage Current
DYNAMIC
Turn-On Time (Note 6)
t
ON
V
NO_
, V
NC_
= 2V;
C
L
= 35pF, R
L
= 300Ω,
Figure 1a
V
NO_
, V
NC_
= 2V;
C
L
= 35pF, R
L
= 300Ω,
Figure 1a
V
NO_
, V
NC_
= 2V;
C
L
= 35pF, R
L
= 300Ω,
Figure 1b
Q
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
1
11
9
32
-52
-65
-66
-67
0.001
1
dB
dB
pC
pF
pF
7
ns
6
14
18
ns
20
8
ns
10
V
IH
V
IL
I
IH
, I
IL
V
IN
_ = 0 or +5.5V
-100
5
2.0
0.4
100
V
V
nA
SYMBOL
I
COM_(ON)
CONDITIONS
V+ = 3.3V; V
COM_
=1V,
3V; V
NO_
or V
NC_
= 1V,
3V, or floating
T
A
= +25°C
T
A
= T
MIN
to T
MAX
MIN
-0.1
-0.3
TYP
±0.01
MAX
0.1
nA
0.3
UNITS
Turn-Off Time (Note 6)
t
OFF
Break-Before-Make Time
(Note 6)
Charge Injection
NO_, NC_ Off-Capacitance
COM On-Capacitance
Off-Isolation (Note 7)
Crosstalk (Note 8)
SUPPLY
Positive Supply Current
I+
V
GEN
= 1.5V, R
GEN
= 0, C
L
= 1.0nF, Figure 2
C
NO_(OFF)
,
V
NO_
, V
NC_
= GND, f = 1MHz, Figure 3
C
NC_(OFF)
C
COM
(ON) V
COM
= GND, f = 1MHz, Figure 3
C
L
= 5pF, R
L
= 50Ω, f = 10MHz, Figure 4
V
ISO
C
L
= 5pF, R
L
= 50Ω, f = 1MHz, Figure 4
V
CT
C
L
= 5pF, R
L
= 50Ω, f = 10MHz, Figure 4
C
L
= 5pF, R
L
= 50Ω, f = 1MHz, Figure 4
V+ = 3.6V, V
IN
= 0 or +3.6V
µA
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:
∆R
ON
= R
ON(MAX)
- R
ON(MIN)
.
Note 4:
∆R
ON
matching specifications for QFN-packaged parts are guaranteed by design.
Note 5:
Flatness is defined as the difference between the maximum and minimum values of on-resistance as measured over the
specified analog signal ranges.
Note 6:
Guaranteed by design.
Note 7:
Off-Isolation = 20log
10
(V
COM
/ V
NO
), V
COM
= output, V
NO
= input to off switch.
Note 8:
Between any two switches.
Note 9:
QFN packaged parts are tested at +25°C and guaranteed by design and correlation over the entire temperature range.
4
_______________________________________________________________________________________
Fast, Low-Voltage, Dual 4Ω SPDT
CMOS Analog Switches
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
MAX4635/MAX4636
ON-RESISTANCE vs. V
COM
MAX4636-01
ON-RESISTANCE vs. V
COM
AND
TEMPERATURE (V+ = +3V)
MAX4636-02
ON-RESISTANCE vs. V
COM
AND
TEMPERATURE (V+ = +5V)
MAX4636-03
14
12
V+ = 1.8V
10
4.0
T
A
= +85°C
3.5
3.0
T
A
= +85°C
2.5
R
ON
(Ω)
R
ON
(Ω)
8
6
4
2
3.0
V+ = 3.0V
V+ = 4.5V
R
ON
(Ω)
2.0
T
A
= -40°C
T
A
= +25°C
1.5
0
0.5
1.0
1.5
V
COM
(V)
2.0
2.5
3.0
0
1
2
3
4
5
V
COM
(V)
V+ = 2.5V
2.5
T
A
= -40°C
T
A
= +25°C
V+ = 5.0V
0
0
1
2
3
4
5
V
COM
(V)
2.0
ON/OFF-LEAKAGE CURRENT
vs. TEMPERATURE (V+ = +5V)
MAX4636-04
CHARGE INJECTION vs. V
COM
MAX4636-05
TURN-ON/OFF TIME
vs. SUPPLY VOLTAGE
MAX4636-06
0.15
0.10
0.05
0
LEAKAGE (nA)
-0.05
-0.10
-0.15
-0.20
-0.25
-0.30
-0.35
-50
0
50
NO
(OFF)
I
COM(ON)
25
20
15
Q (pC)
10
V
CC
= +3V
5
V
CC
= +5V
40
t
ON
/t
OFF
(ns)
20
t
ON
t
OFF
0
-5
100
0
1
2
3
4
5
TEMPERATURE (°C)
V
COM
(V)
0
1.5
2.5
3.5
4.5
5.5
SUPPLY VOLTAGE (V)
TURN-ON/OFF TIME
vs. TEMPERATURE (V+ = +5V)
MAX4636-07
POWER-SUPPLY CURRENT
vs. TEMPERATURE (V+ = +5V)
MAX4636-08
LOGIC-LEVEL THRESHOLD
vs. SUPPLY VOLTAGE
MAX4636-09
25
2.0
2.5
LOGIC-LEVEL THRESHOLD (V)
-50
0
50
100
20
t
ON
/t
OFF
(ns)
t
ON
I+, I
GND
(nA)
1.5
2.0
15
1.5
1.0
10
t
OFF
1.0
0.5
5
0.5
0
-50
0
50
100
TEMPERATURE (°C)
0
TEMPERATURE (°C)
0
1
2
3
SUPPLY VOLTAGE (V)
4
5
_______________________________________________________________________________________
5
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