19-1414; Rev 5; 10/07
Fault-Protected, High-Voltage Single 8-to-1/
Dual 4-to-1 Multiplexers with Output Clamps
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 400Ω max and is matched between
channels to 15Ω 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.
Features
♦
±40V Fault Protection with Power Off
±25V Fault Protection with ±15V Supplies
♦
Rail-to-Rail Signal Handling
♦
No Power-Supply Sequencing Required
♦
All Channels Off with Power Off
♦
Output Clamped to Appropriate Supply Voltage
During Fault Condition
♦
1kΩ Output Clamp Resistance During
Overvoltage
Ω
♦
400Ω max On-Resistance
♦
20ns Fault-Response Time
♦
±4.5V to ±20V Dual Supplies
+9V to +36V Single Supply
♦
TTL/CMOS-Compatible Logic Inputs
MAX4508/MAX4509
Applications
Data-Acquisition Systems
Industrial and Process Control
Avionics
Signal Routing
Redundant/Backup Systems
PART
MAX4508CSE+
MAX4508CPE+
MAX4508C/D
MAX4508ESE+
MAX4508EPE+
MAX4508MJE
Ordering Information
TEMP
RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-
PACKAGE
16 Narrow SO
16 Plastic DIP
Dice*
PKG
CODE
S16-8
P16-4
—
S16-8
P16-4
J16-3
-40°C to +85°C 16 Narrow SO
-40°C to +85°C 16 Plastic DIP
-40°C to +85°C 16 CERDIP**
Functional Diagrams/Truth Tables appear at end of
data sheet.
Ordering Information continued at end of data sheet.
*Contact
factory for dice specifications.
**Contact
factory for availability.
+Denotes a lead-free package.
Pin Configurations/Functional Diagrams
TOP VIEW
MAX4508
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
LOGIC
MAX4509
16 A1
15 GND
14 V+
13 NO1B
12 NO2B
11 NO3B
10 NO4B
9
COMB
SO/DIP
SO/DIP
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Fault-Protected, High-Voltage Single 8-to-1/
Dual 4-to-1 Multiplexers with Output Clamps
MAX4508/MAX4509
ABSOLUTE MAXIMUM RATINGS
(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
= +70°C)
16 Narrow SO (derate 8.70mW/°C above +70°C) ........696mW
16-Pin PDIP (derate 10.53mW/°C above +70°C)..........842mW
16-Pin CERDIP (derate 10.00mW/°C above +70°C).....800mW
Operating Temperature Ranges
MAX4508C_ E/MAX4509C_E...............................0°C to +70°C
MAX4508E_ E/MAX4509E_E ............................-40°C to +85°C
MAX4508MJE/MAX4509MJE..........................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
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
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
= +25°C.) (Note 2)
PARAMETER
ANALOG SWITCH
Fault-Free Analog Signal Range
(Notes 3, 4)
On-Resistance
V
NO_
V+ = +15V, V- = -15V,
V
NO_
= ±15V
V
COM_
= ±10V, I
NO_
= 0.2mA
C, E, M
+25°C
R
ON
C, E
M
+25°C
On-Resistance Match Between
Channels (Note 5)
ΔR
ON
V
COM_
= ±10V, I
NO_
= 0.2mA
C, E
M
+25°C
NO_ Off-Leakage Current
(Note 6)
I
NO_(OFF)
–
V
NO_
= ±10V, V
COM_
= +10V
C, E
M
+25°C
MAX4508
COM_ Off-Leakage Current
(Note 6)
I
COM_(OFF)
V
COM_
= ±10V,
–
V
NO_
= +10V
MAX4509
C, E
M
+25°C
C, E
M
+25°C
MAX4508
COM_ On-Leakage Current
(Note 6)
I
COM_(ON)
V
COM_
= ±10V,
V
NO_
= ±10V or
floating
MAX4509
C, E
M
+25°C
C, E
M
2
V-
300
V+
400
500
700
15
20
25
Ω
Ω
V
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
-
0.5
-5
-50
-2
-20
-200
-1
-100
-100
-2
-100
-300
-1
-15
-150
+0.5
+5
+50
+2
+75
+200
+1
+75
+100
+2
+75
+300
+1
+75
+150
nA
nA
nA
_______________________________________________________________________________________
Fault-Protected, High-Voltage Single 8-to-1/
Dual 4-to-1 Multiplexers with Output Clamps
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
= +25°C.) (Note 2)
PARAMETER
FAULT PROTECTION
Fault-Protected Analog Signal
Range (Notes 3, 4)
COM_ Output Leakage Current,
Supplies On
V
NO_
Applies with power on, Figure 9
Applies with power off
V
NO_
= ±25V, V
EN
= 0
+25°C
+25°C
I
COM_
C, E
M
NO_ Input Leakage Current,
Supplies On
I
NO_
–
V
NO_
= ±25V, V
COM_
= +10V,
V
EN
= 0
+25°C
C, E
M
+25°C
NO_ Input Leakage Current,
Supplies Off
COM_ On Clamp Output
Current, Supplies On
COM_ On Clamp Output
Resistance, Supplies On
± Fault Output Clamp Turn-On
Delay (Note 4)
± Fault Recovery Time (Note 4)
LOGIC INPUT
A_ Input Logic Threshold High
A_ Input Logic Threshold Low
A_ Input Current Logic
High or Low
V
A_H
V
A_L
I
A_H
, I
A_L
V
A_
= 0.8V or 2.4V
C, E, M
C, E, M
C, E, M
-1
2.4
0.8
+1
V
V
µA
I
NO_
V
NO_
= ±40V, V
COM
= 0,
V+ = 0, V- = 0
V
COM
= 0
V
NO_
= ±25V
R
L
= 10kΩ, V
NO_
= ±25V
R
L
= 10kΩ, V
NO_
= ±25V
V
NO_
= +25V
V
NO_
= -25V
C, E
M
I
COM_
R
COM_
+25°C
+25°C
+25°C
+25°C
-25
-40
-20
-1
-100
-20
-200
-50
-20
-5
-100
7
-13
100
10
-11
1.0
20
2.5
+25
+40
+20
+1
+100
+20
+200
+50
+20
+5
+100
13
-7
2.5
V
nA
µA
nA
µA
nA
µA
mA
kΩ
ns
µs
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
MAX4508/MAX4509
SWITCH DYNAMIC CHARACTERISTICS
+25°C
Enable Turn-On Time
t
ON
V
NO_
= ±10V, R
L
= 1kΩ,
Figures 2 and 3
Figure 2
V
NO_
= ±10V, R
L
= 1kΩ,
Figures 2 and 3
V
NO_
= ±10V, R
L
= 1kΩ,
Figure 4
C
L
= 1.0nF, V
NO_
= 0, R
S
= 0,
Figure 5
R
L
= 75Ω, C
L
= 15pF,
V
NO_
= 1V
RMS
, f = 1MHz, Figure 6
C, E
M
Transition Time
t
TRANS
+25°C
C, E, M
+25°C
Enable Turn-Off Time
Break-Before-Make Time Delay
(Note 4)
Charge Injection (Note 4)
Off-Isolation (Note 7)
t
OFF
C, E
M
t
BBM
Q
V
ISO
C, E, M
+25°C
+25°C
10
80
2
-70
10
120
170
160
275
400
600
350
500
200
250
400
ns
pC
dB
ns
ns
ns
_______________________________________________________________________________________
3
Fault-Protected, High-Voltage Single 8-to-1/
Dual 4-to-1 Multiplexers with Output Clamps
MAX4508/MAX4509
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
= +25°C.) (Note 2)
PARAMETER
Channel-to-Channel Crosstalk
(Note 8)
NO_ Off-Capacitance
COM_ Off-Capacitance
COM_ On-Capacitance
POWER SUPPLY
Power-Supply Range
V+ Supply Current
V+, V-
I+
All V
A_
= 0 or 5V, V
NO_
= 0,
V
EN
= 5V
C, E, M
+25°C
C, E
M
+25°C
V- Supply Current
I-
All V
A_
= 0 or 5V, V
NO_
= 0,
V
EN
= 5V
All V
A_
= 0 or 5V, V
NO_
= 0,
V
EN
= 5V
C, E
M
+25°C
C, E, M
200
200
±4.5
370
±20
500
750
850
300
400
500
300
500
µA
µA
µA
V
SYMBOL
V
CT
C
N_(OFF)
CONDITIONS
R
L
= 75Ω, C
L
= 15pF,
V
NO_
= 1V
RMS
, f = 1MHz, Figure 7
f = 1MHz, Figure 8
MAX4508
MAX4509
MAX4508
MAX4509
T
A
+25°C
+25°C
+25°C
+25°C
MIN
TYP
-62
10
19
14
28
22
MAX
UNITS
dB
pF
pF
pF
C
COM_(OFF)
f = 1MHz, Figure 8
C
COM_(ON)
f = 1MHz, Figure 8
GND Supply Current
I
GND
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
= +25°C.) (Note 2)
PARAMETER
ANALOG SWITCH
Fault-Free Analog Signal Range
(Note 3)
On-Resistance
V
NO_
V+ = 12V, V- = 0, V
NO_
= 12V
C, E, M
+25°C
R
ON
V
COM_
= +10V, I
NO_
= 200µA
C, E
M
+25°C
On-Resistance Match Between
Channels (Note 5)
ΔR
ON
V
COM_
= 10V, I
NO_
= 200µA
C, E
M
+25°C
NO_ Off-Leakage Current
(Notes 6, 9)
I
NO_(OFF)
V
COM_
= 10V, 1V;
V
NO_
= 1V, 10V
C, E
M
10
0
650
V+
950
1100
1300
35
50
75
Ω
Ω
V
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
-
0.5
-10
-200
0.01
+0.5
+10
+200
nA
4
_______________________________________________________________________________________
Fault-Protected, High-Voltage Single 8-to-1/
Dual 4-to-1 Multiplexers with Output Clamps
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
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MAX4508
COM_ Off-Leakage Current
(Note 6)
I
COM_(OFF)
V
COM_
= 10V, 1V;
V
NO_
= 1V, 10V
MAX4509
T
A
+25°C
C, E
M
+25°C
C, E
M
+25°C
MAX4508
COM_ On-Leakage Current
(Note 6)
I
COM_(ON)
V
COM_
= 10V, 1V;
V
NO_
= 10V, 1V, or
floating
MAX4509
FAULT PROTECTION
Fault-Protected Analog Signal
Range (Notes 3, 10)
COM_ Output Leakage Current,
Supply On (Notes 3, 10)
V
NO_
Applies with all power on
Applies with all power off
V
NO_
= ±25V, V+ = 12V
+25°C
+25°C
I
COM_
C, E
M
+25°C
NO_ Input Leakage Current,
Supply On (Notes 3, 10)
I
NO_
V
NO_
= ±25V, V
COM_
= 0,
V+ = 12V
C, E
M
+25°C
NO_ Input Leakage Current,
Supply Off (Notes 3, 10)
COM_ ON Output Current,
Supply On
COM_ ON Output Resistance,
Supply On
LOGIC INPUT
A_ Input Logic Threshold High
A_ Input Logic Threshold Low
A_ Input Current Logic
High or Low
V
IN_H
V
IN_L
I
INH_
,
I
INL_
V
IN_
= 0.8V or 2.4V
C, E, M
C, E, M
C, E, M
0.8
-1
1.8
1.8
0.03
+1
2.4
V
V
µA
I
NO_
V
NO_
= ±40V, V+ = 0, V- = 0
C, E
M
I
COM_
R
COM_
V
NO_
= 25V, V
+
= 12V
V
NO_
= 25V, V
+
= 12V
+25°C
+25°C
-25
-40
-20
-1
-100
-20
-5
-100
-20
-5
-100
2
3
2.4
0.1
+25
+40
+20
+1
+100
+20
+5
+100
+20
+5
+100
5
6
V
nA
µA
nA
µA
nA
µA
µA
mA
kΩ
C, E
M
+25°C
C, E
M
MIN
-2
-20
-200
-1
-10
-100
-2
-100
-300
-1
-15
-150
TYP
MAX
+2
+75
+200
+1
+75
+100
+2
+75
+300
+1
+75
+150
nA
nA
UNITS
MAX4508/MAX4509
_______________________________________________________________________________________
5
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