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.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
