19-1515; Rev 0; 7/99
Fault-Protected, High-Voltage,
Dual Analog Switches
General Description
The MAX4631/MAX4632/MAX4633 high-voltage, dual
analog switches are pin compatible with the industry-stan-
dard DG401/DG403/DG405. They upgrade the existing
devices with fault-protected inputs and Rail-to-Rail
®
signal
handling capabilities. The MAX4631/MAX4632/MAX4633’s
normally open (NO) and normally closed (NC) terminals
are protected from overvoltage faults up to 36V during
power-up or power-down. During a fault condition, these
terminals become open circuit and only nanoamperes of
leakage current flow from the source, yet the switch output
(COM_) continues to furnish up to 18mA of the appropri-
ate polarity supply voltage to the load. This ensures unam-
biguous rail-to-rail outputs when a fault begins and ends.
On-resistance is 85Ω (max) at +25°C and is matched
between switches to 6Ω (max). Off-leakage current is only
0.5nA at +25°C and 5nA at +85°C.
The MAX4631 has two NO single-pole/single-throw (SPST)
switches. The MAX4632 has two NO/NC single-pole/
double-throw (SPDT) switches. The MAX4633 has two NO
double-pole/single-throw (DPST) switches.
These CMOS switches operate with dual power supplies
ranging from ±4.5V to ±18V or a single supply between
+9V and +36V. All digital inputs have +0.8V and +2.4V
logic thresholds, ensuring both TTL- and CMOS-logic
compatibility when using ±15V or a single +12V supply.
Features
o
Fault Protection
±40V with Power Off
±36V with ±15V Supplies (MAX4631/MAX4633)
±25V with ±15V Supplies (MAX4632)
o
Rail-to-Rail Signal Handling
o
No Power-Supply Sequencing Required
o
All Switches Off with Power Off
o
Output Clamped to Appropriate Supply Voltage
During Fault Condition; No Transition Glitch
o
85Ω (max) Signal Paths with ±15V Supplies
o
±4.5V to ±18V Dual Supplies
+9V to +36V Single Supply
o
Low Power Consumption: <6mW
o
Pin Compatible with Industry-Standard
DG401/DG403/DG405
o
TTL- and CMOS-Logic Compatible Inputs with
Single +9V to +15V, or ±15V Supplies
MAX4631/MAX4632/MAX4633
Ordering Information
PART
MAX4631CSE
MAX4631CPE
MAX4631ESE
MAX4631EPE
MAX4631MJE
MAX4632CSE
MAX4632CPE
MAX4632ESE
MAX4632EPE
MAX4632MJE
MAX4633CSE
MAX4633CPE
MAX4633ESE
MAX4633EPE
MAX4633MJE
TEMP. RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
PIN-PACKAGE
16 Narrow SO
16 Plastic DIP
16 Narrow SO
16 Plastic DIP
16 CERDIP
16 Narrow SO
16 Plastic DIP
16 Narrow SO
16 Plastic DIP
16 CERDIP
16 Narrow SO
16 Plastic DIP
16 Narrow SO
16 Plastic DIP
16 CERDIP
Applications
ATE Equipment
Data Acquisition
Industrial and Process Control Systems
Avionics
Redundant/Backup Systems
Pin Configurations appear at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Fault-Protected, High-Voltage,
Dual Analog Switches
MAX4631/MAX4632/MAX4633
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND)
V+ ...........................................................................-0.3V to +44V
V- ............................................................................-44V to +0.3V
V+ to V-...................................................................-0.3V to +44V
COM_, IN_ (Note 1) ..............................(V- - 0.3V) to (V+ + 0.3V)
NC_, NO_ (Note 2)
MAX4631_ _E .....................................(V+ - 36V) to (V- + 36V)
MAX4632_ _E .....................................(V+ - 25V) to (V- + 25V)
MAX4633_ _E .....................................(V+ - 36V) to (V- + 36V)
NC_, NO_ to COM_
MAX4631_ _E ......................................................-36V to +36V
MAX4632_ _E ......................................................-25V to +25V
MAX4633_ _E ......................................................-36V to +36V
Continuous Current into Any Terminal..............................±30mA
Peak Current into Any Terminal (pulsed at 1ms,
10% duty cycle)............................................................±50mA
Continuous Power Dissipation (T
A
= +70°C) (Note 2)
Plastic DIP (derate 10.53mW/°C above +70°C) ..........842mW
Narrow SO (derate 8.70mW/°C above +70°C) ............696mW
CERDIP (derate 10.00mW/°C above +70°C) ...............842mW
Operating Temperature Ranges
MAX463_C_E ......................................................0°C to +70°C
MAX463_E_E ...................................................-40°C to +85°C
MAX463_M_E ................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
Note 1:
COM_ and IN_ pins are not fault protected. Signals on COM_ to IN_ exceeding V+ or V- are clamped by internal diodes.
Limit forward diode current to maximum current rating.
Note 2:
NC_ and NO_ pins are fault protected (see
Electrical Characteristics).
With power applied to V+ or V-, signals on NC_ or
NO_ exceeding ±25V (MAX4632) or ±36V (MAX4631/MAX4633) may damage the device. With V+ = V- = 0, signals on NC_
or NO_ exceeding ±40V may damage the device.
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—Dual Supplies
(V+ = +15V, V- = -15V, V
INL_
= 0.8V, V
INH_
= 2.4V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 3)
PARAMETER
ANALOG SWITCH
Fault-Free Analog Signal Range
(Note 2)
COM_ to NO_ or NC_
On-Resistance
COM_ to NO_ or NC_
On-Resistance Match
Between Channels (Note 4)
NO_, NC_, COM_ Off-Leakage
Current (Note 5)
V
NO_
, V
NC_
V
COM_
= ±10V,
I
COM_
= 1mA
V
COM_
= ±10V,
I
COM_
= 1mA
V
COM_
= ±14V,
V
NO_
or V
NC_
=
−
14V
+
V
COM_
= ±14V,
V
NO_
or V
NC_
= ±14V
or floating
C, E, M
+25°C
R
ON
C, E
M
+25°C
∆R
ON
I
NO_ (OFF)
,
I
NC_ (OFF)
,
I
COM_(OFF)
I
COM_(ON)
C, E
M
+25°C
C, E
M
+25°C
C, E
M
-0.5
-5
-100
-0.5
-20
-100
0.01
0.01
3
V-
62
V+
85
100
200
6
10
15
0.5
5
100
0.5
20
100
nA
nA
Ω
Ω
V
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
COM_ On-Leakage Current
(Note 5)
FAULT PROTECTION
Fault-Protected Analog
Signal Range (Note 2)
V
NO_
, V
NC_
Applies with
power on
MAX4631/
MAX4633
MAX4632
C, E, M
C, E, M
C, E, M
-36
-25
-40
36
25
40
V
Applies with power off
2
_______________________________________________________________________________________
Fault-Protected, High-Voltage,
Dual Analog Switches
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
(V+ = +15V, V- = -15V, V
INL_
= 0.8V, V
INH_
= 2.4V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 3)
PARAMETER
COM_ Output Leakage Current,
Supplies On
SYMBOL
I
COM_
CONDITIONS
V
NO_
or V
NC_
= ±25V,
no connection to “on” channel
(MAX4632 only)
V
NO_
or V
NC_
= ±25V,
V
COM_
= ±10V
T
A
+25°C
C, E
M
+25°C
NO_ or NC_ Input Leakage
Current, Supplies On
I
NO_
, I
NC_
C, E
M
+25°C
NO_ or NC_ Input Leakage
Current, Supplies Off
COM_ Output Clamp Current,
Supplies On
COM_ Output Clamp Resistance,
Supplies On
LOGIC INPUT
IN_ Input Logic Voltage High
IN_ Input Logic Voltage Low
IN_ Input Current Logic
High or Low
V
INH_
V
INL_
I
INH_
, I
INL_
V
IN_
= 0.8V or 2.4V
C, E, M
C, E, M
+25°C
C, E, M
+25°C
Turn-On Time
t
ON
V
COM_
= ±10V, R
L
= 1kΩ,
Figure 2
C, E,
M
+25°C
Turn-Off Time
Break-Before-Make Time Delay
(MAX4632 only)
Charge Injection (Note 6)
NO_, NC_ Off- Capacitance
COM_ Off-Capacitance
COM_ On-Capacitance
t
OFF
V
COM_
= ±10V, R
L
= 1kΩ,
Figure 2
V
COM_
= ±10V, R
L
= 1kΩ,
Figure 3
C
L
= 100pF, Figure 4,
NO_ = NC_ = GND, R
S
= 0
NO_ = NC_ = GND, f = 1MHz,
Figure 5
COM
_
= GND, f = 1MHz,
Figure 5
COM
_
= NO_ = NC_ = GND,
f = 1MHz, Figure 5
C, E,
M
t
BBM
Q
C
NC_(OFF)
,
C
NO_(OFF)
C
COM_(OFF)
C
COM_(ON)
+25°C
+25°C
C, E, M
C, E, M
C, E, M
10
40
5
18
18
22
10
50
-1
-5
100
0.03
2.4
0.8
1
5
150
500
600
100
400
500
ns
pC
pF
pF
pF
ns
ns
V
V
µA
I
NO_
, I
NC_
V
NO_
or V
NC_
= ±40V,
V
NO_
or V
NC_
= +25V
V
NO_
or V
NC_
= -25V
V
NO_
or V
NC_
= ±25V
C, E
M
I
COM_
R
COM_
+25°C
+25°C
+25°C
MIN
-10
-200
-1
-20
-200
-10
-20
-200
-10
13
-24
18
-18
0.5
TYP
MAX
10
200
1
20
200
10
20
200
10
24
13
1
UNITS
nA
µA
nA
µA
nA
µA
mA
kΩ
MAX4631/MAX4632/MAX4633
SWITCH DYNAMIC CHARACTERISTICS
_______________________________________________________________________________________
3
Fault-Protected, High-Voltage,
Dual Analog Switches
MAX4631/MAX4632/MAX4633
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
(V+ = +15V, V- = -15V, V
INL_
= 0.8V, V
INH_
= 2.4V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 3)
PARAMETER
Off-Isolation
(Note 7)
SYMBOL
V
ISO
CONDITIONS
R
L
= 50Ω, C
L
= 15pF,
V
NO_
= V
NC_
= 1V
RMS
,
f = 1MHz, Figure 6
R
L
= 50Ω, C
L
= 15pF,
V
NO_
= V
NC_
= 1V
RMS
,
f = 1MHz, Figure 7
T
A
C, E, M
MIN
TYP
-62
MAX
UNITS
dB
Channel-to-Channel Crosstalk
(Note 8)
POWER SUPPLY
Power-Supply Range
V+ Supply Current
V- Supply Current
V
CT
C, E, M
-66
dB
V+, V-
I+
C, E, M
All V
IN_
= 0 or 5V,
V
NO_
or V
NC_
= 0
All V
IN_
= 0 or 5V,
V
NO_
or V
NC_
= 0
All V
IN_
= 0 or 15V,
V
NO_
or V
NC_
= 0
All V
IN_
= 5V,
V
NO_
or V
NC_
= 0
+25°C
C, E, M
+25°C
C, E, M
+25°C
C, E, M
+25°C
C, E, M
±4.5
230
130
-1
0.01
125
±18
325
550
200
300
1
10
175
300
V
µA
µA
I-
GND Supply Current
I
GND
µA
ELECTRICAL CHARACTERISTICS—Single Supply
(V+ = +15V, V- = -15V, V
INL_
= 0.8V, V
INH_
= 2.4V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 3)
PARAMETER
ANALOG SWITCH
Fault-Free Analog Signal Range
(Note 2)
COM_ to NO_ or NC_
On-Resistance
COM_ to NO_ or NC_
On-Resistance Match
Between Channels (Note 4)
NO_, NC_, COM_ Off-Leakage
Current (Notes 5, 9)
V
NO_
, V
NC_
V
COM_
= 10V,
I
COM_
= 1mA
V
COM_
= 10V,
I
COM_
= 1mA
V
COM_
= 10V,
V
NO_
or V
NC_
= 12V
V
COM_
= 10V,
V
NO_
or V
NC_
= 1V or 12V
C, E, M
+25°C
R
ON
C, E
M
+25°C
∆R
ON
C, E
M
+25°C
I
NO_ (OFF)
,
I
NC_ (OFF)
C, E
M
+25°C
COM_ On-Leakage Current
(Notes 5, 9)
FAULT PROTECTION
Fault-Protected Analog
Signal Range (Note 2)
Applies with
power on
MAX4631/
MAX4633
MAX4632
Applies with power off
C, E, M
C, E, M
C, E, M
-36
-25
-40
36
25
40
V
I
COM_(ON)
C, E
M
-0.5
-10
-200
-0.5
-20
-400
0.01
0.01
4
0
125
V+
200
250
300
10
20
30
0.5
10
200
0.5
20
400
nA
nA
Ω
Ω
V
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
V
NO_
, V
NC_
4
_______________________________________________________________________________________
Fault-Protected, High-Voltage,
Dual Analog Switches
ELECTRICAL CHARACTERISTICS—Single Supply (continued)
(V+ = +15V, V- = -15V, V
INL_
= 0.8V, V
INH_
= 2.4V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 3)
PARAMETER
COM_ Output Leakage Current,
Supplies On
NO_ or NC_ Input Leakage
Current, Supplies On
NO_ or NC_ Input Leakage
Current, Supplies Off
COM_ Output Clamp Current,
Supplies On
COM_ Output Clamp Resistance,
Supplies On
LOGIC INPUT
IN_ Input Logic Voltage High
IN_ Input Logic Voltage Low
IN_ Input Current Logic
High or Low
V
INH_
V
INL_
I
INH_
, I
INL_
V
IN_
= 0.8V or 2.4V
V
IN_
= 0.8V or 2.4V
C, E, M
C, E, M
+25°C
C, E, M
+25°C
Turn-On Time
t
ON
V
COM_
= ±10V, R
L
= 2kΩ,
Figure 2
C, E,
M
+25°C
Turn-Off Time
Break-Before-Make Time Delay
(MAX4632 only)
Charge Injection (Note 6)
NO_, NC_ Off-Capacitance
COM_ Off-Capacitance
COM_ On-Capacitance
Off-Isolation
(Note 7)
Channel-to-Channel Crosstalk
(Note 8)
t
OFF
V
COM_
= ±10V, R
L
= 2kΩ,
Figure 2
V
COM_
= ±10V, R
L
= 2kΩ,
Figure 3
C
L
= 100pF, Figure 4,
NO_ = NC_ = GND, R
S
= 0
NO_ = NC_ = GND,
f = 1MHz, Figure 5
COM
_
= GND, f = 1MHz,
Figure 5
COM
_
= NO_ = NC_ = GND,
f = 1MHz, Figure 5
R
L
= 50Ω, C
L
= 15pF,
V
NO_
= V
NC_
= 1V
RMS
,
f = 1MHz, Figure 6
R
L
= 50Ω, C
L
= 15pF,
V
NO_
= V
NC_
= 1V
RMS
,
f = 1MHz, Figure 7
C, E,
M
t
BBM
Q
C
NC_(OFF)
,
C
NO_(OFF)
C
COM_(OFF)
C
COM_(ON)
+25°C
+25°C
C, E, M
C, E, M
C, E, M
5
40
5
20
20
25
100
-1
-5
140
0.03
2.4
0.8
1
5
250
300
500
200
250
400
ns
pC
pF
pF
pF
ns
ns
V
V
µA
µA
SYMBOL
I
COM_
CONDITIONS
V
NO_
or V
NC_
= ±25V,
no connection to “on” channel
(MAX4632 only)
V
NO_
or V
NC_
= ±25V,
V
COM_
= ±10V
V
NO_
or V
NC_
= ±40V
V
NO_
or V
NC_
= 25V
V
NO_
or V
NC_
= 25V
T
A
C, E
M
C, E
M
C, E
M
+25°C
+25°C
MIN
-10
-1
-100
-10
-100
-10
4
5.5
1
1
TYP
MAX
10
1
100
10
100
10
10
2.5
UNITS
nA
µA
nA
µA
nA
µA
mA
kΩ
MAX4631/MAX4632/MAX4633
I
NO_
, I
NC_
I
NO_
, I
NC_
I
COM_
R
COM_
SWITCH DYNAMIC CHARACTERISTICS
V
ISO
C, E, M
-62
dB
V
CT
C, E, M
-65
dB
_______________________________________________________________________________________
5
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