MAX4508CSE+-MAX4508ESE+-MAX4509CSE+-MAX4509ESE+ Fast Delivery |IC PHOENIX CO.,LIMITED

MAX4508ESE+ ,Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers with Output ClampsFeaturesThe MAX4508/MAX4509 are 8-to-1 and dual 4-to-1 fault- ♦ ±40V Fault Protection with Power Of ..
MAX4509CPE ,Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 MultiplexersELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = +15V, V- = -15V, V =+2.4V, V = +0.8V, V = +2.4V, T = ..
MAX4509CSE ,Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 MultiplexersMAX4508/MAX450919-1414; Rev 0; 1/99Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiple ..
MAX4509CSE+ ,Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers with Output ClampsELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = +15V, V- = -15V, V =+2.4V, V = +0.8V, V = +2.4V, T = ..
MAX4509ESE ,Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 MultiplexersApplicationsOrdering InformationData-Acquisition Systems PART TEMP. RANGE PIN-PACKAGEIndustrial and ..
MAX4509ESE ,Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 MultiplexersMAX4508/MAX450919-1414; Rev 0; 1/99Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiple ..
MAX8538EEI+ ,Dual-Synchronous Buck Controllers for Point-of-Load, Tracking, and DDR Memory Power SuppliesFeatures♦ MAX8537/MAX8539: Complete DDR SuppliesThe MAX8537/MAX8539 controllers provide a completep ..
MAX8538EEI+T ,Dual-Synchronous Buck Controllers for Point-of-Load, Tracking, and DDR Memory Power SuppliesELECTRICAL CHARACTERISTICS(V+ = 12V, EN_ = VL, BST_ = 6V, LX_ = 1V, VL load = 0mA, C = 10µF (cerami ..
MAX8538EEI+T ,Dual-Synchronous Buck Controllers for Point-of-Load, Tracking, and DDR Memory Power Suppliesfeaturesenhance flexibility. Out-of-phaseMAX8538EEI -40°C to +85°C 28 QSOPnontracking
MAX853CSA ,Low-Noise, Regulated, Negative Charge Pump Power Supplies for GaAsFET BiasMAX850–MAX85319-0238; Rev 2; 4/96Low -Noise, Regulated, Negative Charge-Pump Pow er Supplies for Ga ..
MAX853ESA ,Low-Noise / Regulated / Negative Charge-Pump Power Supplies for GaAsFET Bias
MAX853ESA ,Low-Noise / Regulated / Negative Charge-Pump Power Supplies for GaAsFET Bias

MAX4508CSE+-MAX4508ESE+-MAX4509CSE+-MAX4509ESE+
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 400Ωmax and is matched between
channels to 15Ωmax. 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±40V Fault Protection with Power Off
±25V Fault Protection with ±15V SuppliesRail-to-Rail Signal HandlingNo Power-Supply Sequencing RequiredAll Channels Off with Power OffOutput Clamped to Appropriate Supply Voltage
During Fault Condition1kΩOutput Clamp Resistance During
Overvoltage400ΩΩmax On-Resistance 20ns Fault-Response Time±4.5V to ±20V Dual Supplies
+9V to +36V Single SupplyTTL/CMOS-Compatible Logic Inputs
MAX4508/MAX4509
Fault-Protected, High-Voltage Single 8-to-1/
Dual 4-to-1 Multiplexers with Output Clamps
GNDNO1
TOP VIEW
MAX4508
NO5
NO6
NO7
NO8COM
NO4
NO3
NO2
SO/DIP
LOGIC
GND
NO1BNO1A
MAX4509
NO2B
NO3B
NO4B
COMBCOMA
NO4A
NO3A
NO2A
SO/DIP
LOGIC
Pin Configurations/Functional Diagrams
19-1414; Rev 5; 10/07
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
**Contact factory for availability.
+Denotes a lead-free package.
Functional Diagrams/Truth Tables appear at end of
data sheet.
Ordering Information
PARTTEMP
RANGE
PIN-
PACKAGE
PKG
CODE
MAX4508CSE+0°C to +70°C16 Narrow SOS16-8
MAX4508CPE+0°C to +70°C16 Plastic DIPP16-4
MAX4508C/D0°C to +70°CDice*—
MAX4508ESE+-40°C to +85°C16 Narrow SOS16-8
MAX4508EPE+-40°C to +85°C16 Plastic DIPP16-4
MAX4508MJE-40°C to +85°C16 CERDIP**J16-3
MAX4508/MAX4509
Fault-Protected, High-Voltage Single 8-to-1/
Dual 4-to-1 Multiplexers with Output Clamps
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—Dual Supplies
(V+ = +15V, V- = -15V, VA_H=+2.4V, VA_L= +0.8V, VEN= +2.4V, TA= TMINto TMAX, unless otherwise noted. Typical values are at= +25°C.) (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.........................................................................-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 (TA= +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.
-150+150
-15+75+1
COM_ On-Leakage Current
(Note 6)
-300 +300
-100+75+2
ICOM_(ON)
-100+100
COM_ Off-Leakage Current
(Note 6)
-100+75+1
-200+200
-20+75+2
ICOM_(OFF)
RONV-V+VNO_Fault-Free Analog Signal Range
(Notes 3, 4)
-50+50
INO_(OFF)NO_ Off-Leakage Current
(Note 6)-5+5nA
-0.5+0.5
500Ω
On-Resistance
ΔRONOn-Resistance Match Between
Channels (Note 5)20
UNITSMINTYPMAXSYMBOLPARAMETER
V+ = +15V, V- = -15V,
VNO_= ±15V
VCOM_= ±10V,
VNO_ = ±10V or
floating
VNO_= ±10V, VCOM_= –+10V
VCOM_= ±10V, INO_= 0.2mA
VCOM_= ±10V, INO_= 0.2mA
VCOM_= ±10V,
VNO_= –+10V
CONDITIONS
C, E
+25°C
+25°C
C, E, M
C, E
+25°C
C, E
C, E
+25°C
+25°C
C, E
+25°C
C, E
C, E
+25°C
MAX4508
MAX4509
MAX4508
MAX4509
ANALOG SWITCH
MAX4508/MAX4509
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, VA_H= +2.4V, VA_L= +0.8V, VEN= +2.4V, TA= TMINto TMAX, unless otherwise noted. Typical values are at= +25°C.) (Note 2)
VNO_= ±25VRCOM_
Enable Turn-On Time
Transition Time
+25°C
170350tTRANSFigure 2C, E, M
+25°C
VNO_= ±10V, RL = 1kΩ,
Figures 2 and 3nstOFFEnable Turn-Off Time250C, E80C, E, MVNO_= ±10V, RL = 1kΩ,
Figure 4ns
400M
tBBMBreak-Before-Make Time Delay
(Note 4)
UNITSMINTYPMAXSYMBOLPARAMETERCONDITIONSTA
tON-1+1IA_H, IA_LA_ Input Current Logic
High or Low0.8VA_LA_ Input Logic Threshold Low2.4VA_HA_ Input Logic Threshold High2.5±Fault Recovery Time (Note 4)20±Fault Output Clamp Turn-On
Delay (Note 4)
COM_ On Clamp Output
Resistance, Supplies OnkΩ1001.02.5
COM_ On Clamp Output
Current, Supplies On-13-11-7mA71013ICOM_-20+20
-40+40V-25+25VNO_Fault-Protected Analog Signal
Range (Notes 3, 4)-100+100+5
-20+20
INO_NO_ Input Leakage Current,
Supplies Off-50+50
INO_NO_ Input Leakage Current,
Supplies On+1
-100+100
ICOM_COM_ Output Leakage Current,
Supplies On-20+20
-200+200
VNO_= ±10V, RL= 1kΩ,
Figures 2 and 3
VA_= 0.8V or 2.4V
Applies with power on, Figure 9= 10kΩ, VNO_= ±25V
RL = 10kΩ, VNO_= ±25V
VNO_= ±40V, VCOM= 0,
V+ = 0, V- = 0
VNO_= ±25V, VCOM_= –+10V,
VEN= 0
VNO_= ±25V, VEN= 0
VCOM= 0
C, E
+25°C
+25°C
C, E, M
C, E, M
C, E, M
+25°C
+25°C
+25°C
C, E
+25°C
+25°C
C, E
+25°C
C, E
+25°C
210+25°CCL= 1.0nF, VNO_= 0, RS= 0,
Figure 5pCQCharge Injection (Note 4)
-70+25°CRL= 75Ω, CL= 15pF,
VNO_= 1VRMS, f = 1MHz,Figure 6dBVISOOff-Isolation (Note 7)
SWITCH DYNAMIC CHARACTERISTICS
LOGIC INPUT
FAULT PROTECTION
Applies with power off
VNO_= +25V
VNO_= -25V
MAX4508/MAX4509
Fault-Protected, High-Voltage Single 8-to-1/
Dual 4-to-1 Multiplexers with Output Clamps
UNITSMINTYPMAXSYMBOLPARAMETERCONDITIONSTA
500µA200300IGNDGND Supply Current
370500V+ Supply Current
±4.5±2010-62VCTChannel-to-Channel Crosstalk
(Note 8)pF14
CN_(OFF)NO_ Off-Capacitance = 75Ω, CL= 15pF,
VNO_= 1VRMS, f = 1MHz, Figure 7
All VA_ = 0 or 5V, VNO_= 0,
VEN= 5V
All VA_ = 0 or 5V, VNO_= 0,
VEN= 5V
f = 1MHz, Figure 8+25°C
C, E, M
+25°C
+25°C
+25°C
+25°CCCOM_(OFF)COM_ Off-Capacitance
f = 1MHz, Figure 8CCOM_(ON)COM_ On-Capacitance 28pF22+25°C
Power-Supply RangeV+, V-C, E, MV
750C, E
850M
400C, E
500M
200300V- Supply CurrentAll VA_= 0 or 5V, VNO_= 0,
VEN= 5V
+25°C0V+VNO_Fault-Free Analog Signal Range
(Note 3)
-200+200
INO_(OFF)NO_ Off-Leakage Current
(Notes 6, 9)-10+10nA
-0.50.01+0.535
ΔRONOn-Resistance Match Between
Channels (Note 5)50
UNITSMINTYPMAXSYMBOLPARAMETER
V+ = 12V, V- = 0, VNO_= 12V
VCOM_= 10V, 1V;
VNO_= 1V, 10V
VCOM_= 10V, INO_= 200µA
CONDITIONS
C, E, M
C, E
+25°C
+25°C
C, E
RON1100Ω
On-ResistanceVCOM_= +10V, INO_= 200µA
+25°C
C, E
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
(V+ = +15V, V- = -15V, VA_H= +2.4V, VA_L= +0.8V, VEN= +2.4V, TA= TMINto TMAX, unless otherwise noted. Typical values are at= +25°C.) (Note 2)
ELECTRICAL CHARACTERISTICS—Single +12V Supply
(V+ = +12V, V- = 0, VA_H= +2.4V, VA_L= +0.8V, VEN= +2.4V, TA= TMINto TMAX, unless otherwise noted. Typical values are at= +25°C.) (Note 2)
ANALOG SWITCH
POWER SUPPLY
f = 1MHz, Figure 8MAX4508
MAX4509
MAX4508
MAX4509
MAX4508/MAX4509
Fault-Protected, High-Voltage Single 8-to-1/
Dual 4-to-1 Multiplexers with Output Clamps
MAX4508
MAX4508
VNO_= 25V, V+= 12V
MAX4509
RCOM_
MAX4509
-150+150
-15+75+1
COM_ On-Leakage Current
(Note 6)
-300 +300
-100+75+2
ICOM_(ON)
-100+100
COM_ Off-Leakage Current
(Note 6)
-10+75+1
-200+200
-20+75+2
ICOM_(OFF)
UNITSMINTYPMAXSYMBOLPARAMETER
VCOM_= 10V, 1V;
VNO_= 10V, 1V, or
floating
VCOM_= 10V, 1V;
VNO_= 1V, 10V
CONDITIONS
C, E
+25°C
C, E
+25°C
C, E
+25°C
C, E
+25°C-10.03+1IINH_,
IINL_
A_ Input Current Logic
High or Low0.81.8VIN_LA_ Input Logic Threshold Low1.82.4VIN_HA_ Input Logic Threshold High
COM_ ON Output Resistance,
Supply OnkΩ2.46
COM_ ON Output Current,
Supply OnmA235ICOM_
-20+20-25+25VNO_Fault-Protected Analog Signal
Range (Notes 3, 10)
-100+100+5
-200.1+20
INO_NO_ Input Leakage Current,
Supply Off (Notes 3, 10)-100+100
INO_NO_ Input Leakage Current,
Supply On (Notes 3, 10)+1µA-100+100
ICOM_COM_ Output Leakage Current,
Supply On (Notes 3, 10)
-20+20+5
VIN_= 0.8V or 2.4V
Applies with all power on
VNO_= ±40V, V+ = 0, V- = 0
VNO_ = ±25V, VCOM_= 0,
V+ = 12V
VNO_= ±25V, V+ = 12V
VNO_= 25V, V+= 12V
+25°C
C, E, M
C, E, M
C, E, M
+25°C
C, E
+25°C
+25°C
C, E
+25°C
C, E
+25°C
ELECTRICAL CHARACTERISTICS—Single +12V Supply (continued)
(V+ = +12V, V- = 0, VA_H= +2.4V, VA_L= +0.8V, VEN= +2.4V, TA= TMINto TMAX, unless otherwise noted. Typical values are at = +25°C.) (Note 2)
FAULT PROTECTION
LOGIC INPUT
Applies with all power off-40+40
MAX4508/MAX4509
Fault-Protected, High-Voltage Single 8-to-1/
Dual 4-to-1 Multiplexers with Output Clamps
COM_ On-Capacitance CCOM_(ON)VCOM_= VNO_= 0, f = 1MHz,
Figure 8+25°C28
COM_ Off-Capacitance CCOM_(OFF)pFVCOM_= 0, f = 1MHz, Figure 8+25°C19
NO_ Off-Capacitance CNO_(OFF)pFVNO_= 0, f = 1MHz, Figure 8+25°C10
+25°C
+25°C
All VA_ = 0 or 5V,
VNO_= 0, VEN= 5V= 75Ω, CL= 15pF,
VNO_= 1VRMS,f = 1MHz, Figure 7
Channel-to-Channel Crosstalk
(Note 8)VCT-62dB
V+ Supply CurrentI+
200300C, E, MC, E, MV+Power-Supply Range
+25°C
C, E, M
VCOM_= 10V, RL = 2kΩ,
Figure 3tON220500
700CONDITIONSPARAMETERSYMBOLMINTYPMAXUNITS
Off-Isolation
(Note 7)VISOdB
Break-Before-Make Time Delay
(Note 4)= 75Ω, CL= 15pF,
VNO_= 1VRMS,f = 1MHz, Figure 6
tBBM
+25°C-70VCOM_= 10V, RL = 2kΩ,
Figure 4
Charge Injection
(Note 4)
+25°C50100
C, E, M
350Enable Turn-Off TimetOFFnsVCOM_= 10V, RL = 2kΩ,
Figure 3
+25°C100250
Enable Turn-On TimensCL= 1.0nF, VNO_= 0, RS= 0,
Figure 5 +25°C210
ELECTRICAL CHARACTERISTICS—Single +12V Supply (continued)
(V+ = +12V, V- = 0, VA_H= +2.4V, VA_L= +0.8V, VEN= +2.4V, TA= TMINto TMAX, unless otherwise noted. Typical values are at= +25°C.) (Note 2)
Note 2:The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 3:NO_ pins are fault protected and COM_ pins are not fault protected. The max input voltage on NO_ pins depends on the
COM_ load configuration. Generally, the max input voltage is ±36V with ±15V supplies and a load referred to ground. For
more detailed information see the NO_ Input Voltagesection.
Note 4:Guaranteed by design.
Note 5:ΔRON= RON(MAX)- RON(MIN).
Note 6:Leakage parameters are 100% tested at the maximum rated hot temperature and guaranteed by correlation at TA= +25°C.
Note 7:Off-Isolation = 20log10 (VCOM_/ VNO_), where VCOM_= output and VNO_= input to off switch.
Note 8:Between any two analog inputs.
Note 9:Leakage testing for single-supply operation is guaranteed by testing with dual supplies.
Note 10:Guaranteed by testing with dual supplies.
+25°CAll VA_ = 0 or V+,
VNO_= 0, VEN= 0 or V+
C, E, M375
SWITCH DYNAMIC CHARACTERISTICS
POWER SUPPLY
MAX4508/MAX4509
Fault-Protected, High-Voltage Single 8-to-1/
Dual 4-to-1 Multiplexers with Output Clamps
Typical Operating Characteristics
(V+ = +15V, V- = -15V, VEN= +2.4V, TA= +25°C, unless otherwise noted.)
ON-RESISTANCE vs.
VCOM (DUAL SUPPLIES)
MAX4508/09toc01
VCOM (V)
ON
V+ = +15V
V- = -15V
V+ = +10V
V- = -10V
V+ = +20V
V- = -20V
V+ = +4.5V
V- = -4.5V
ON-RESISTANCE vs.
VCOM (SINGLE SUPPLY)
MAX4508/09toc02
VCOM (V)
ON
V+ = +9V
V+ = +15V
V+ = +20V
V+ = +30V
V+ = +36V
V+ = +12V
ON-RESISTANCE vs. VCOM AND
TEMPERATURE (DUAL SUPPLIES)
MAX4508/09toc03
VCOM (V)
ON
V+ = +15V
V- = -15V
+125°C
+25°C
+70°C
-55°C-40°C
+85°C
ON-RESISTANCE vs. VCOM AND
TEMPERATURE (SINGLE SUPPLY)
MAX4508/09toc04
VCOM (V)
ON
V+ = +12V
V- = 0+125°C
-55°C
+70°C
-40°C
+85°C
+25°C
0.1p
100p
10p
10n
100n
LEAKAGE CURRENT vs. TEMPERATURE
MAX4508/09toc05
TEMPERATURE (°C)
LEAKAGE (A)
V+ = +15V
V- = -15V
VCOM = 10V
VNO = ±10V
ICOM_OFF
ICOM_ON
INO_OFF
CHARGE INJECTION vs. VCOM
MAX4508/09toc06
VCOM (V)
Q (pC)
V+ = +15V
V- = -15V
DUAL
SUPPLIES
SINGLE
SUPPLY
800±4±6±8±10±2±12±14±16±18±20
ENABLE ON AND OFF TIMES vs.
SUPPLY VOLTAGE (DUAL SUPPLIES)
MAX4508/09toc07
SUPPLY VOLTAGE (V)
tON
, t
OFF
(ns)
VNO_ = ±10V
tON
tOFF
ENABLE ON AND OFF TIMES vs.
SUPPLY VOLTAGE (SINGLE SUPPLY)
MAX4508/09toc08
SUPPLY VOLTAGE (V)
tON
, t
OFF
(ns)
VNO_ = +10V
tON
tOFF
ENABLE ON AND OFF TIMES
vs. TEMPERATURE
MAX4508/09toc09
TEMPERATURE (°C)
V+ = +15V
V- = -15V
tON
tOFF
tON
, t
OFF
(ns)
MAX4508/MAX4509
Fault-Protected, High-Voltage Single 8-to-1/
Dual 4-to-1 Multiplexers with Output Clamps
Typical Operating Characteristics (continued)
(V+ = +15V, V- = -15V, VEN= +2.4V, TA= +25°C, unless otherwise noted.)
POWER-SUPPLY CURRENT
vs. TEMPERATURE (VA = 0)
MAX4508/09toc10
TEMPERATURE (°C)
I+, I-, I
GND
V+ = +15V
V- = -15V
VA = 0
IGND
POWER-SUPPLY CURRENT
vs. TEMPERATURE (VA = +5V)
MAX4508/09toc11
TEMPERATURE (°C)
SUPPLY CURRENT I+, I-, I
GND
V+ = +15V
V- = -15V
VA = +5V
IGND
LOGIC-LEVEL THRESHOLD
vs. SUPPLY VOLTAGE
MAX4508/09toc12
SUPPLY VOLTAGE (V)
LOGIC-LEVEL THRESHOLD (V)
V- = GND
DUAL
SUPPLIES
SINGLE
SUPPLY
FREQUENCY RESPONSE
MAX4508/09taoc13
FREQUENCY (MHz)
LOSS (dB)
V+ = +15V
V- = -15V
BANDWIDTH
CROSSTALK
OFF-ISOLATION
5μs/div
FAULT-FREE SIGNAL PERFORMANCE
IN_
10V/div
10V/div
COM_
FAULT-FREE RAIL-TO-RAIL SIGNAL HANDLING
WITH ±15V SUPPLIES
+15V
+15V
-15V
-15V
MAX4508/09toc14
5μs/div
INPUT OVERVOLTAGE vs. OUTPUT CLAMPING
IN_
COM_
±25V OVERVOLTAGE INPUT WITH THE OUTPUT
CLAMPED AT ±15V
-15V
-25V
+25V
+15V0V
MAX4508/09toc16
MAX4508/MAX4509
Fault-Protected, High-Voltage Single 8-to-1/
Dual 4-to-1 Multiplexers with Output Clamps
Detailed Description
Traditional fault-protected multiplexers are constructed
with three series FET switches. This produces good off
protection, but limits the switches input voltage range
to as much as 3V below the supply rails, reducing its
usable dynamic range. As the voltage on one side of
the switch approaches within about 3V of either supply
rail (a fault condition), the switch impedance increases,
limiting the output signal range to approximately 3V
less than the appropriate polarity supply voltage.
The MAX4508/MAX4509 differ considerably from tradi-
tional fault-protected multiplexers, offering several
advantages. First, they are constructed with two paral-
lel FETs, allowing very low resistance when the switch
is on. Second, they allow signals on the NO_ pins that
are within or beyond the supply rails to be passed
through the switch to the COM terminal. This allows rail-
to-rail signal operation. Third, when a signal VNO_
exceeds the supply rails (i.e., a fault condition), the
voltage on COM_ is limited to the supply rails.
Operation is identical for both fault polarities.
Pin Descriptions
Truth Tables
NAMEFUNCTIONA0Address Bit 0ENMux Enable
PINV-Negative Supply VoltageNO1Channel Input 1COMAnalog OutputNO4Channel Input 4NO3Channel Input 3NO2Channel Input 2NO5Channel Input 5NO6Channel Input 6NO7Channel Input 7NO8Channel Input 8V+Positive Supply VoltageGNDGroundA2Address Bit 2A1Address Bit 1
MAX4508 (Single 8-to-1 Mux)MAX4509 (Dual 4-to-1 Mux)
NAMEFUNCTIONA0Address Bit 0ENMux Enable
PINV-Negative Supply VoltageNO1AChannel Input 1ACOMAMux Output ANO4AChannel Input 4ANO3AChannel Input 3ANO2AChannel Input 2ANO1BChannel Input 1BNO2BChannel Input 2BNO3BChannel Input 3BNO4BChannel Input 4BCOMBMux Output BV+Positive Supply VoltageGNDGroundA1Address Bit 1xNone0NO10NO21NO31NO70NO60NO51NO41NO8ON SWITCHA2A0EN
MAX4508 (Single 8-to-1 Mux)NoneNO1ANO2ANO3ANO4ACOMAA0EN
MAX4509 (Dual 4-to-1 Mux)
None
NO1B
NO2B
NO3B
NO4B
COMB

Partno	Mfg	Dc	Qty	Available	Descript
MAX4508CSE+ \|MAX4508CSE	MAXIM	N/a	80	avai	Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers with Output Clamps
MAX4508ESE+ \|MAX4508ESE	MAXIM	N/a	212	avai	Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers with Output Clamps
MAX4509CSE+ \|MAX4509CSE	MAXIM	N/a	17	avai	Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers with Output Clamps
MAX4509ESE+ \|MAX4509ESE	MAXIM	N/a	14	avai	Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers with Output Clamps