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General Description
The MAX4508/MAX4509 are 8-to-1 and dual 4-to-1 fault-
protected multiplexers that are pin-compatible with the
industry-standard DG508/DG509. The MAX4508/
MAX4509 operate with dual supplies of 4.5V to 20V or
a single supply of +9V to +36V. These multiplexers fea-
ture fault-protected inputs, Rail-to-Rail
signal handling
capability, and overvoltage clamping at 150mV beyond
the rails.
Both parts offer 40V overvoltage protection with sup-
plies off and 25V protection with supplies on. On-
resistance is 400
max and is matched between
channels to 15
max. All digital inputs have TTL logic
thresholds, ensuring both TTL and CMOS logic com-
patibility when using a single +12V supply or dual 15V
supplies.
Applications
Data-Acquisition Systems
Industrial and Process Control
Avionics
Signal Routing
Redundant/Backup Systems
Features
o
40V Fault Protection with Power Off
25V Fault Protection with 15V Supplies
o
Rail-to-Rail Signal Handling
o
No Power-Supply Sequencing Required
o
All Channels Off with Power Off
o
Output Clamped to Appropriate Supply Voltage
During Fault Condition
o
1k
Output Clamp Resistance During
Overvoltage
o
400
max On-Resistance
o
20ns Fault-Response Time
o
4.5V to 20V Dual Supplies
+9V to +36V Single Supply
o
TTL/CMOS-Compatible Logic Inputs
MAX4508/MAX4509
Fault-Protected, High-Voltage
Single 8-to-1/Dual 4-to-1 Multiplexers
________________________________________________________________
Maxim Integrated Products
1
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
MAX4508
NO5
NO6
NO7
NO8
COM
NO4
NO3
NO2
SSOP/SO/DIP
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
MAX4509
NO2B
NO3B
NO4B
COMB
COMA
NO4A
NO3A
NO2A
SSOP/SO/DIP
LOGIC
Pin Configurations/Functional Diagrams
19-1414; Rev 0; 1/99
PART
MAX4508
CAE
MAX4508CSE
MAX4508CPE
0C to +70C
0C to +70C
0C to +70C
TEMP. RANGE
PIN-PACKAGE
16 SSOP
16 Narrow SO
16 Plastic DIP
Ordering Information continued at end of data sheet.
*
Contact factory for dice specifications.
**
Contact factory for availability.
Functional Diagrams/Truth Tables appear at end of
data sheet.
Ordering Information
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
MAX4508C/D
0C to +70C
Dice*
MAX4508EAE
-40C to +85C
16 SSOP
MAX4508ESE
-40C to +85C
16 Narrow SO
MAX4508EPE
-40C to +85C
16 Plastic DIP
MAX4508MJE
-55C to +125C
16 CERDIP**
MAX4508/MAX4509
Fault-Protected, High-Voltage
Single 8-to-1/Dual 4-to-1 Multiplexers
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS--Dual Supplies
(V+ = +15V, V- = -15V, V
A_H
=+2.4V, V
A_L
= +0.8V, V
EN
= +2.4V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25C.) (Note 2)
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+ ........................................................................-0.3V to +44.0V
V- .........................................................................-44.0V to +0.3V
V+ to V-................................................................-0.3V to +44.0V
COM_, A_ (Note 1) .............................. (V+ + 0.3V) to (V- - 0.3V)
NO_.........................................................(V+ - 40V) to (V- + 40V)
NO_ to COM_ ..........................................................-36V to +36V
NO_ Overvoltage with Switch Power On. ................-30V to +30V
NO_ Overvoltage with Switch Power Off. ................-40V to +40V
Continuous Current into Any Terminal..............................30mA
Peak Current, Into Any Terminal
(pulsed at 1ms, 10% duty cycle).................................100mA
Continuous Power Dissipation (T
A
= +70C)
16 SSOP (derate 8.70mW/C above +70C) ................667mW
16 Narrow SO (derate 8.70mW/C above +70C) ........471mW
16-Pin Plastic DIP (derate 10.53mW/C above +70C) 842mW
16-Pin CERDIP (derate 10.00mW/C above +70C).....800mW
Operating Temperature Ranges
MAX4508C_ E/MAX4509C_E...............................0C to +70C
MAX4508E_ E/MAX4509E_E ............................-40C to +85C
MAX4508MJE/MAX4509MJE..........................-55C to +125C
Storage Temperature Range .............................-65C to +160C
Lead Temperature (soldering, 10sec) .............................+300C
Note 1:
COM_, EN, and A_ pins are not fault protected. Signals on COM_, EN, or A_ exceeding V+ or V- are clamped by internal
diodes. Limit forward diode current to maximum current rating.
-150
150
-15
15
-1
1
COM_ On-Leakage Current
(Note 6)
-300 300
-25
25
nA
-2
2
I
COM_(ON)
-100
100
COM_ Off-Leakage Current
(Note 6)
-10
10
-1
1
-200
200
-20
20
nA
-2
2
I
COM_(OFF)
300
400
R
ON
V
V-
V+
V
NO_
Fault-Free Analog Signal Range
(Notes 3, 4)
-50
50
I
NO_(OFF)
NO_ Off-Leakage Current
(Note 6)
-5
5
nA
-
0.5
0.5
25
500
700
On-Resistance
15
R
ON
On-Resistance Match Between
Channels (Note 5)
20
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
V+ = +15V, V- = -15V,
V
NO_
= 15V
V
COM_
= 10V,
V
NO_
= 10V or
floating
V
NO_
= 10V, V
COM_
=
+10V
V
COM_
= 10V, I
NO_
= 0.2mA
V
COM_
= 10V, I
NO_
= 0.2mA
V
COM_
= 10V,
V
NO_
=
+10V,
CONDITIONS
M
C, E
+25C
+25C
M
C, E, M
C, E
+25C
M
C, E
M
C, E
+25C
M
+25C
M
C, E
M
+25C
C, E
C, E
+25C
T
A
MAX4508
MAX4509
MAX4508
MAX4509
ANALOG SWITCH
MAX4508/MAX4509
Fault-Protected, High-Voltage
Single 8-to-1/Dual 4-to-1 Multiplexers
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS--Dual Supplies (continued)
(V+ = +15V, V- = -15V, V
A_H
= +2.4V, V
A_L
= +0.8V, V
EN
= +2.4V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25C.) (Note 2)
V
NO_
= 25V
R
COM_
ns
600
ns
Enable Turn-On Time
120
200
M
Transition Time
+25C
500
170
350
t
TRANS
Figure 2
C, E, M
+25C
V
NO_
= 10V, R
L
= 1k
,
Figures 2 and 3
ns
t
OFF
Enable Turn-Off Time
250
C, E
10
80
C, E, M
V
NO_
= 10V, R
L
= 1k
,
Figure 4
ns
400
M
t
BBM
Break-Before-Make Time Delay
(Note 4)
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
CONDITIONS
T
A
400
160
275
t
ON
A
-1
1
I
A_H
, I
A_L
A_ Input Current Logic
High or Low
V
0.8
V
A_L
A_ Input Logic Threshold Low
V
2.4
V
A_H
A_ Input Logic Threshold High
s
2.5
Fault Recovery Time (Note 4)
ns
20
Fault Output Clamp Turn-On
Delay (Note 4)
COM_ On Clamp Output
Resistance, Supplies On
k
100
1.0
2.5
COM_ On Clamp Output
Current, Supplies On
-13
-11
-7
mA
7
10
13
I
COM_
nA
-10
10
-40
40
V
-25
25
V
NO_
Fault-Protected Analog Signal
Range (Notes 3, 4)
A
-100
100
nA
-5
5
-20
20
I
NO_
NO_ Input Leakage Current,
Supplies Off
A
-50
50
I
NO_
NO_ Input Leakage Current,
Supplies On
-20
20
A
-100
100
I
COM_
COM_ Output Leakage Current,
Supplies On
nA
-20
20
-200
200
V
NO_
= 10V, R
L
= 1k
,
Figures 2 and 3
V
A_
= 0.8V or 2.4V
Applies with power on, Figure 9
R
L
= 10k
, V
NO_
= 25V
R
L
= 10k
, V
NO_
= 25V
V
NO_
= 40V, V
COM
= 0,
V+ = 0, V- = 0
V
NO_
= 25V, V
COM_
=
+10V,
V
EN
= 0
V
NO_
= 25V, V
EN
= 0
V
COM
= 0
C, E
+25C
+25C
C, E, M
C, E, M
C, E, M
+25C
+25C
+25C
M
C, E
+25C
+25C
M
C, E
M
+25C
C, E
+25C
2
10
+25C
C
L
= 1.0nF, V
NO_
= 0, R
S
= 0,
Figure 5
pC
Q
Charge Injection
(Note 4)
-70
+25C
R
L
= 75
, C
L
= 15pF,
V
NO_
= 1V
RMS
, f = 1MHz, Figure 6
dB
V
ISO
Off-Isolation
(Note 7)
SWITCH DYNAMIC CHARACTERISTICS
LOGIC INPUT
FAULT PROTECTION
Applies with power off
V
NO_
= 25V
V
NO_
= -25V
MAX4508/MAX4509
Fault-Protected, High-Voltage
Single 8-to-1/Dual 4-to-1 Multiplexers
4
_______________________________________________________________________________________
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
CONDITIONS
T
A
500
A
200
300
I
GND
GND Supply Current
A
370
500
I+
V+ Supply Current
4.5
20
pF
10
dB
-62
V
CT
Channel-to-Channel Crosstalk
(Note 8)
19
pF
14
C
N_(OFF)
NO_ Off-Capacitance
R
L
= 75
, C
L
= 15pF,
V
NO_
= 1V
RMS
, f = 1MHz, Figure 7
All V
A_
= 0 or 5V,
V
NO_
= 0, V
EN
= 5V
All V
A_
= 0 or 5V,
V
NO_
= 0, V
EN
= 5V
f = 1MHz, Figure 8
+25
C
C, E, M
+25
C
+25C
+25C
+25
C
C
COM_(OFF)
COM_ Off-Capacitance
f = 1MHz, Figure 8
C
COM_(ON)
COM_ On-Capacitance
28
pF
22
+25
C
Power-Supply Range
V+, V-
C, E, M
V
600
C, E
800
M
400
C, E
500
M
A
200
300
I-
V- Supply Current
All V
A_
= 0 or 5V,
V
NO_
= 0, V
EN
= 5V
+25C
V
0
V+
V
NO_
Fault-Free Analog Signal Range
(Note 3)
-200
200
I
NO_(OFF)
NO_ Off-Leakage Current
(Notes 6, 9)
-10
10
nA
-
0.5
0.01
0.5
75
10
25
R
ON
On-Resistance Match Between
Channels (Note 5)
50
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
V+ = 12V, V- = 0,
V
NO_
= 12V
V
COM_
= 10V, 1V;
V
NO_
= 1V, 10V
V
COM_
= 10V, I
NO_
= 200A
CONDITIONS
C, E, M
M
C, E
+25C
M
+25C
C, E
T
A
650
950
R
ON
1100
1300
On-Resistance
V
COM_
= +10V, I
NO_
= 200A
+25C
C, E
M
ELECTRICAL CHARACTERISTICS--Dual Supplies (continued)
(V+ = +15V, V- = -15V, V
A_H
= +2.4V, V
A_L
= +0.8V, V
EN
= +2.4V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25C.) (Note 2)
ELECTRICAL CHARACTERISTICS--Single +12V Supply
(V+ = +12V, V- = 0, V
A_H
= +2.4V, V
A_L
= +0.8V, V
EN
= +2.4V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25C.) (Note 2)
ANALOG SWITCH
POWER SUPPLY
f = 1MHz, Figure 8
MAX4508
MAX4509
MAX4508
MAX4509
A
MAX4508/MAX4509
Fault-Protected, High-Voltage
Single 8-to-1/Dual 4-to-1 Multiplexers
_______________________________________________________________________________________
5
MAX4508
MAX4508
V
NO_
= 25V, V
+
= 12V
MAX4509
R
COM_
MAX4509
-150
150
-15
15
-1
1
COM_ On-Leakage Current
(Note 6)
-300 300
-25
25
nA
-2
2
I
COM_(ON)
-100
100
COM_ Off-Leakage Current
(Note 6)
-10
10
-1
1
-200
200
-20
20
nA
-2
2
I
COM_(OFF)
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
V
COM_
= 10V, 1V;
V
NO_
= 10V, 1V, or
floating
V
COM_
= 10V, 1V;
V
NO_
= 1V, 10V
CONDITIONS
M
C, E
+25C
M
C, E
+25C
M
C, E
+25C
M
C, E
+25C
T
A
A
-1
0.03
1
I
INH_
,
I
INL_
A_ Input Current Logic
High or Low
V
0.8
1.8
V
IN_L
A_ Input Logic Threshold Low
V
1.8
2.4
V
IN_H
A_ Input Logic Threshold High
COM_ ON Output Resistance,
Supply On
k
2.4
6
COM_ ON Output Current,
Supply On
mA
2
3
5
I
COM_
-20
20
V
-25
25
V
NO_
Fault-Protected Analog Signal
Range (Notes 3, 10)
-100
100
nA
-5
5
-20
0.1
20
I
NO_
NO_ Input Leakage Current,
Supply Off (Notes 3, 10)
A
-100
100
I
NO_
NO_ Input Leakage Current,
Supply On (Notes 3, 10)
-20
20
A
-100
100
I
COM_
COM_ Output Leakage Current,
Supply On (Notes 3, 10)
-20
20
-5
5
V
IN_
= 0.8V or 2.4V
Applies with all power on
V
NO_
= 40V, V+ = 0, V- = 0
V
NO_
= 25V, V
COM_
= 0,
V+ = 12V
V
NO_
= 25V, V+ = 12V
V
NO_
= 25V, V
+
= 12V
+25C
C, E, M
C, E, M
C, E, M
+25C
M
C, E
+25C
+25C
M
C, E
M
+25C
C, E
+25C
nA
ELECTRICAL CHARACTERISTICS--Single +12V Supply (continued)
(V+ = +12V, V- = 0, V
A_H
= +2.4V, V
A_L
= +0.8V, V
EN
= +2.4V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25C.) (Note 2)
FAULT PROTECTION
LOGIC INPUT
Applies with all power off
-40
40
nA
A
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