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19-2737; Rev 0; 1/03
Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches
General Description
The MAX312F/MAX313F/MAX314F are quad, singlepole/single-throw (SPST), fault-protected analog switches. They are pin compatible with the industry-standard nonprotected MAX312/MAX313/MAX314. These switches feature fault-protected inputs and Rail-to-Rail signalhandling capability. All analog signal terminals are protected from overvoltage faults up to 36V with power on and up to 40V with power off. During a fault condition, the COM_, NO_, or NC_ terminal becomes an open circuit and only microamperes of leakage current flow from the source. On-resistance is 10 (max) and is matched between switches to 0.5 (max) at +25C. The MAX312F has four normally closed (NC) switches. The MAX313F has four normally open (NO) switches. The MAX314F has two NC and two NO switches. These CMOS switches operate with dual power supplies ranging from 4.5V to 20V 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. For supply voltages of 5V, +5V, and +3V, refer to the MAX4711/MAX4712/MAX4713 data sheet. o Rail-to-Rail Signal Handling o All Switches Off with Power Off o All Switches Off when V+ is Off and V- is On o 40V Fault Protection with Power Off o 36V Fault Protection with 15V Supplies o Control Line Fault Protection from V- - 0.3V to V- + 40V o Pin Compatible with Industry-Standard DG411/DG412/DG413 o 600ns (typ) Fault Response Time o 10 (max) RON with 15V Supplies o 4.5V to 20V Dual Supplies o +9V to +36V Single Supply o TTL- and CMOS-Compatible Logic Inputs with 15V or Single +9V to +15V Supplies
Features
o No Power-Supply Sequencing Required
MAX312F/MAX313F/MAX314F
Applications
Communications Systems Signal Routing Test Equipment Data Acquisition Industrial and Process Control Systems Avionics Redundant/Backup Systems ATE Hot Swap
TOP VIEW
IN1 COM1 NC1 VGND NC4 COM4 IN4 1 2 3 4 5 6 7 8
Ordering Information
PART MAX312FESE MAX312FEPE TEMP RANGE -40C to +85C -40C to +85C PIN-PACKAGE 16 SO 16 Plastic DIP
Ordering Information continued at end of data sheet.
Pin Configurations
16 IN2 15 COM2 14 NC2 13 V+
MAX312F
12 N.C. 11 NC3 10 COM3 9 IN3
DIP/SO
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. Functional Diagram appears at end of data sheet. Pin Configurations continued at end of data sheet.
MAX312F LOGIC SWITCH 0 1 ON OFF
N.C. = NOT CONNECTED. SWITCHES SHOWN FOR LOGIC 0 INPUT. ALL SWITCHES ARE OFF WITH POWER REMOVED.
________________________________________________________________ Maxim Integrated Products
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Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches MAX312F/MAX313F/MAX314F
ABSOLUTE MAXIMUM RATINGS
(Voltages Referenced to GND.) V+ ...........................................................................-0.3V to +44V V- ............................................................................-44V to +0.3V V+ to V-...................................................................-0.3V to +44V IN_ ......................................................... (V- - 0.3V) to (V- + 40V) NO_, NC_ to COM_ (Note 1) .................................. -40V to +40V COM_, NO_, NC_ Voltage with Power On (Note 1).............................................. -36V to +36V COM_, NO_, NC_ Voltage with Power Off (Note 1).............................................. -40V to +40V Peak Current COM_, NO_, NC_ (pulsed at 1ms, 10% duty cycle) ................................300mA Continuous Current (any other terminal).......................... 30mA Continuous Current (COM_, NO_, NC_).........................100mA Continuous Power Dissipation (TA = +70C) 16-Pin SO (derate 8.7mW/C above +70C)................696mW 16-Pin Plastic DIP (derate 10.53mW/C above +70C) ........................................................ 842mW Operating Temperature Range .......................... -40C to +85C Junction Temperature .................................................... +150C Storage Temperature Range ........................... -65C to +160C Lead Temperature (soldering, 10s) ............................... +300C
Note 1: COM_, NO_, and NC_ pins are fault protected. Signals on COM_, NO_, and NC_ exceeding -36V to +36V may damage the device during power-on conditions. When the power is off, the maximum range is -40V to +40V.
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--15V Dual Supplies
(V+ = +15V, V- = -15V, VIH = +2.4V, VIL = +0.8V, GND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Notes 2, 3)
PARAMETER ANALOG SWITCH Fault-Free Analog Signal Range On-Resistance On-Resistance Match Between Channels (Note 4) On-Resistance Flatness (Note 5) NO_, NC_ Off-Leakage Current (Note 6) COM_ Off-Leakage Current (Note 6) COM_ On-Leakage Current (Note 6) FAULT V+ = +15V, V- = -15V Fault-Protected Analog Signal Range NO_ or NC_ Off-Leakage Current (Note 6) COM_ Off-Leakage Current (Note 6) VCOM_, VNO_, VNC_ INO_(OFF), INC_(OFF) ICOM_(OFF) V+ = 0V, V- = -15V V+ = V- = 0V VNO_, VNC_ = 36V; V+ = +15V, 0V; V- = -15V VCOM_ = 36V; V+ = +15V, 0V; V- = -15V E E E +25C E +25C E -36 -36 -40 -1 -10 -1 -10 +36 +36 +40 +1 +10 +1 +10 A A V VCOM_, VNO_, VNC_ RON RON RFLAT(ON) INO_(OFF), INC_(OFF) ICOM_(OFF) ICOM_(ON) ICOM_ = 10mA; VNO_, VNC_ = 10V ICOM_ = 10mA; VNO_, VNC_ = 10V ICOM_ = 10mA; VNO_, VNC_ = 5V, 0V VCOM_ = 10V; VNO_, VNC_ = 10V VCOM_ = 10V; VNO_, VNC_ = 10V VCOM_ = 10V; VNO_, VNC_ = 10V or floating E +25C E +25C E +25C E +25C E +25C E +25C E -1 -60 -1 -60 -2 -60 0.25 0.05 V8 V+ 10 13 0.5 0.75 1 1.25 +1 +60 +1 +60 +2 +60 V nA nA nA SYMBOL CONDITIONS TA MIN TYP MAX UNITS
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Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches
ELECTRICAL CHARACTERISTICS--15V Dual Supplies (continued)
(V+ = +15V, V- = -15V, VIH = +2.4V, VIL = +0.8V, GND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Notes 2, 3)
PARAMETER NO_ or NC_ Leakage Current (Note 6) COM_ Leakage Current (Note 6) Fault-Trip Threshold Fault Response Time Fault Recovery Time SWITCH DYNAMICS Turn-On Time Turn-Off Time Break-Before-Make Time Delay (MAX314F Only) (Note 7) Charge Injection NO_ or NC_ Off-Capacitance COM_ Off-Capacitance COM_ On-Capacitance Off-Isolation (Note 8) Channel-to-Channel Crosstalk (Note 9) LOGIC INPUT Input Logic High Input Logic Low Input Leakage Current POWER SUPPLY Power-Supply Range V+, VAll VIN_ = +5V, VCOM_ = 0V V+ Supply Current I+ All VIN_ = 0V or V+, VCOM_ = 0V E +25C E +25C E 140 4.5 340 20 500 700 250 350 A V VIH VIL IIN VIN_ = 0V or V+ E E E -1 2.4 0.8 +1 V V A tON tOFF tBBM Q CN_(OFF) CCOM_(ON) VISO VCT VNO_ or VNC_ = 10V, RL = 300, +25C CL = 35pF, Figure 2 E VNO_ or VNC_ = 10V, RL = 300, +25C CL = 35pF, Figure 2 E VNO_ or VNC_ = 10V, RL = 100, +25C CL = 10pF, Figure 3 E VGEN = 0V, RGEN = 0, CL = 1nF, Figure 4 f = 1MHz, Figure 5 f = 1MHz, Figure 5 f = 1MHz, RL = 50, CL = 15pF, PIN = 0dBm, Figure 6 f = 1MHz, RL = 50, CL = 15pF, PIN = 0dBm, Figure 6 +25C +25C +25C +25C +25C +25C 5 2 70 20 20 43 -55 -104 115 70 45 225 275 185 235 ns ns ns pC pF pF pF dB dB tRES tREC VNO_, VNC_ = 36V; RL = 300 VNO_, VNC_ = 36V; RL = 300 SYMBOL INO_, INC_ ICOM_ CONDITIONS VNO_, VNC_ = 40V; V+ = V- = 0V VCOM_ = 40V; V+ = V- = 0V E +25C E E E E TA +25C MIN -1 -10 -1 -10 V- - 0.4 600 1 TYP MAX +1 +10 +1 +10 V+ + 0.4 UNITS A A V ns s
MAX312F/MAX313F/MAX314F
CCOM_(OFF) f = 1MHz, Figure 5
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Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches MAX312F/MAX313F/MAX314F
ELECTRICAL CHARACTERISTICS--15V Dual Supplies (continued)
(V+ = +15V, V- = -15V, VIH = +2.4V, VIL = +0.8V, GND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Notes 2, 3)
PARAMETER SYMBOL CONDITIONS All VIN_ = +5V, VCOM_ = 0V V- Supply Current IAll VIN_ = 0V or V+, VCOM_ = 0V All VIN_ = +5V, VCOM_ = 0V GND Supply Current IGND All VIN_ = 0V or V+, VCOM_ = 0V E +25C E +25C E +25C E 0 200 140 TA +25C MIN TYP 140 MAX 200 300 250 350 300 400 1 10 A A UNITS
ELECTRICAL CHARACTERISTICS--Single +12V Supply
(V+ = +12V, V- = 0V, VIH = +2.4V, VIL = +0.8V, GND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Notes 2, 3)
PARAMETER ANALOG SWITCH Fault-Free Analog Signal Range On-Resistance On-Resistance Match Between Channels (Note 4) On-Resistance Flatness NO_, NC_ Off-Leakage Current (Note 6) COM_ Off-Leakage Current (Note 6) COM_ On-Leakage Current (Note 6) FAULT Fault-Protected Analog Signal Range NO_ or NC_ Off-Leakage Current (Note 6) COM_ Off-Leakage Current (Note 6) NO_ or NC_ Leakage Current (Note 6) VCOM_, VNO_, VNC_ INO_(OFF), INC_(OFF) ICOM_(OFF) INO_, INC_ V+ = +12V, V- = 0V V+ = V- = 0V VNO_, VNC_ = 36V; V+ = +12V; V- = 0V VNO_, VNC_ = 36V; V+ = +12V; V- = 0V V+ = V- = 0V; VNO_, VNC_ = 40V E E +25C E +25C E +25C E -36 -40 -1 -10 -1 -10 -1 -10 +36 +40 +1 +10 +1 +10 +1 +10 A V A A VCOM_, VNO_, VNC_ RON RON RFLAT(ON) INO_(OFF), INC_(OFF) ICOM_(OFF) ICOM_ = 10mA; VNO_, VNC_ = +10V ICOM_ = 10mA; VNO_, VNC_ = +10V ICOM_ = 10mA; VNO_, VNC_ = +2V, +6V, +10V VCOM_ = +1V, +10V; VNO_, VNC_ = +10V, +1V VCOM_ = +1V, +10V; VNO_, VNC_ = +10V, +1V VCOM_ = +1V, +10V; VNO_, VNC_ = +1V, +10V, or floating E +25C E +25C E +25C E +25C E +25C E +25C E -1 -60 -1 -60 -2 -60 3 0 16 0.4 V+ 25 30 1.5 2 6 7 +1 +60 +1 +60 +2 nA +60 V nA nA SYMBOL CONDITIONS TA MIN TYP MAX UNITS
ICOM_(ON)
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Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches
ELECTRICAL CHARACTERISTICS--Single +12V Supply (continued)
(V+ = +12V, V- = 0V, VIH = +2.4V, VIL = +0.8V, GND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Notes 2, 3)
PARAMETER COM_ Leakage Current (Note 6) Fault Response Time Fault Recovery Time SWITCH DYNAMICS Turn-On Time Turn-Off Time Break-Before-Make Time Delay (MAX314F Only) (Note 6) Charge Injection LOGIC INPUT Input Logic High Input Logic Low Input Leakage Current (Note 6) POWER SUPPLY Power-Supply Range V+ All VIN_ = +5V, VCOM_ = +6V V+ Supply Current I+ All VIN_ = 0V or V+, VCOM_ = +6V E +25C E +25C E 70 +9 160 +36 300 400 150 250 A V VIH VIL IIN VIN_ = 0V or V+ E E E -1 2.4 0.8 +1 V V A tON tOFF tBBM Q VNO_ or VNC_ = +10V, RL = 300, +25C CL = 35pF, Figure 2 E VNO_ or VNC_ = +10V, RL = 300, +25C CL = 35pF, Figure 2 E VNO_ or VNC_ = +10V, RL = 100, +25C CL = 10pF, Figure 3 E VGEN = 0V, RGEN = 0, CL = 1nF, Figure 4 +25C 10 5 -10 140 75 65 325 425 175 225 ns ns ns pC SYMBOL ICOM_ tRES tREC CONDITIONS V+ = V- = 0V; VNO_, VNC_ = 40V VNO_, VNC_ = +36V; RL = 300 VNO_, VNC_ = +36V; RL = 300 E E E TA +25C MIN -1 -10 200 1 TYP MAX +1 +10 UNITS A ns s
MAX312F/MAX313F/MAX314F
Note 2: Note 3: Note 4: Note 5: Note 6: Note 7: Note 8: Note 9:
The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Electrical specifications at -40C are guaranteed by design and not production tested. RON = RON(MAX) - RON(MIN). Flatness is defined as the difference between the maximum and minimum value of on-resistance over the specified analog signal range. Single-supply leakage parameters are guaranteed by testing with dual supplies at the maximum rated temperature. Guaranteed by design. Off-isolation = 20 log10 [VCOM/(VNC or VNO)], VNC or VNO = output, VCOM = input to off switch. Between any two switches.
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Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches MAX312F/MAX313F/MAX314F
Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM (DUAL SUPPLIES)
MAX312F/13F/14F toc01
ON-RESISTANCE vs. VCOM AND TEMPERATURE (DUAL SUPPLIES)
MAX312F/13F/14F toc02
ON-RESISTANCE vs. VCOM (SINGLE SUPPLY)
V+ = +9V V- = 0V V+ = +12V V- = 0V V+ = +15V V- = 0V
MAX312F/13F/14F toc03
25 V+ = +5V V- = -5V V+ = +10V V- = -10V V+ = +15V V- = -15V
15 V+ = +15V V- = -15V 12 TA = +85C RON () 9 TA = +25C 6 TA = -40C
30 25 20 RON () 15 10
20
RON ()
15
V+ = +24V V- = 0V
10
5 V+ = +20V V- = -20V 0 -20 -15 -10 -5 0 VCOM (V) 5 10 15 20
3
5 0 -15 -10 -5 0 VCOM (V) 5 10 15 0 6 12
V+ = +28V V- = 0V 18 VCOM (V) 24
0
V+ = +36V V- = 0V 30 36
ON-RESISTANCE vs. VCOM AND TEMPERATURE (SINGLE SUPPLY)
MAX312F/13F/14F toc04
ON/OFF-LEAKAGE CURRENT vs. TEMPERATURE
MAX312F/13F/14F toc05
CHARGE INJECTION vs. VCOM
DUAL SUPPLIES: 15V
MAX312F/13F/14F toc06
25
10,000 1000 LEAKAGE CURRENT (pA) 100 10 ICOM(OFF) 1 0.1 INO(OFF), INC(OFF) ICOM(ON)
200 150 100 Q (pC) 50 0 SINGLE SUPPLY: +12V -50 -100
20
TA = +85C TA = +25C TA = -40C
RON ()
15
10
5 V+ = +12V V- = 0V 0 0 2 4 6 VCOM (V) 8 10 12
0.01 -40 -15 10
DUAL SUPPLIES: V+ = +15V, V- = -15V 35 60 85
-15
-10
-5
0 VCOM (V)
5
10
15
TEMPERATURE (C)
SUPPLY CURRENT vs. TEMPERATURE
400 SUPPLY CURRENT (A) 300 200 100 0 -100 -200 -300 -40 -15 10 35 60 85 TEMPERATURE (C) IIGND 1.0 0 DUAL SUPPLIES: V+ = +15V, V- = -15V, VIN_ = +5V I+
MAX312F/13F/14F toc07
LOGIC-LEVEL THRESHOLD VOLTAGE vs. SUPPLY VOLTAGE
MAX312F/13F/14F toc08
TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGE (DUAL SUPPLIES)
MAX312F/13F/14F toc09
500
3.0
500
THRESHOLD VOLTAGE (V)
2.5 DUAL SUPPLIES 2.0
400 tON/tOFF (ns)
300 tON 200 tOFF 100
1.5
SINGLE SUPPLY
0 5 10 15 20 25 30 35 40 5 10 15 20 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V+, V-)
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Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches MAX312F/MAX313F/MAX314F
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGE (SINGLE SUPPLY)
MAX312F/13F/14F toc10
TURN-ON/TURN-OFF TIME vs. TEMPERATURE (DUAL SUPPLIES)
MAX312F/13F/14F toc11
TURN-ON/TURN-OFF TIME vs. TEMPERATURE (SINGLE SUPPLY)
V+ = +12V, V- = 0V
MAX312F/13F/14F toc12
200
250
200
160 tON/tOFF (ns)
200 tON/tOFF (ns)
160 tON/tOFF (ns) tON
120
150
tON
120
80 tON 40 tOFF V- = GND 0 9 18 27 36 SUPPLY VOLTAGE (V+)
100 tOFF 50 DUAL SUPPLIES: 15V 0 -40 -15 10 35 60 85 TEMPERATURE (C)
80
tOFF
40
0 -40 -15 10 35 60 85 TEMPERATURE (C)
FREQUENCY RESPONSE
MAX312F/13F/14F toc13
TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY
MAX312F/13F/14F toc14
FAULT CURRENT vs. FAULT VOLTAGE (DUAL SUPPLIES)
150 100 ICOM (A) 50 0 -50 -100 DUAL SUPPLIES: V+ = +15V, V- = -15V
MAX312F/13F/14F toc15
20 V+ = +15V, V- = -15V 0 -20 LOSS (dB) -40 OFF-ISOLATION -60 -80 -100 -120 0.001 CROSSTALK ON-RESPONSE
0.01
15V DUAL SUPPLIES: IN = OUT = 600, VP-P = 5V
200
THD + N (%)
0.001
-150 0.0001 -200 10 100 1k 10k -60 -40 -20 FREQUENCY (Hz)
FOR |VCOM| < VSUPPLY, ICOM = VCOM/RL 0 VCOM (V) 20 40 60
0.01
0.1
1
10
100
1000
FREQUENCY (MHz)
FAULT CURRENT vs. FAULT VOLTAGE (SINGLE SUPPLY)
+12V SINGLE SUPPLY 150 100 ICOM (A) 50 0 -50 -100 -150 -200 -60 -40 -20 FOR 0V < VCOM < VSUPPLY, ICOM = VCOM/RL 0 VCOM (V) 20 40 60
MAX312F/13F/14F toc16
200
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Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches MAX312F/MAX313F/MAX314F
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
INPUT OVERVOLTAGE vs. OUTPUT
MAX312F/13F/14F toc17
FAULT RECOVERY TIME (POSITIVE INPUT)
MAX312F/13F/14F toc18
+25V VNO_, VNC_ INPUT GND
+25V VNO_, VNC_ INPUT +5V GND +5V VCOM_ OUTPUT GND
-25V +15V GND -15V 2ms/div 1s/div
FAULT RECOVERY TIME (NEGATIVE INPUT)
MAX312F/13F/14F toc19
FAULT RESPONSE TIME (POSITIVE INPUT)
MAX312F/13F/14F toc20
GND -5V VNO_, VNC_ INPUT -25V
VNO_, VNC_ INPUT 10V/div GND
GND VCOM_ OUTPUT -5V
VCOM_ OUTPUT 10V/div GND
1s/div
400ns/div
FAULT RESPONSE TIME (NEGATIVE INPUT)
MAX312F/13F/14F toc21
FAULT RESPONSE (V+ = 0V, V- = -15V)
MAX312F/13F/14F toc22
GND VNO_, VNC_ INPUT 10V/div
+25V VNO_, VNC_ INPUT GND
GND VCOM_ OUTPUT 10V/div
-25V GND VCOM_ OUTPUT 500mV/div 200s/div
1s/div
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Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches
Pin Description
PIN NAME MAX312F 1, 16, 9, 8 2, 15, 10, 7 3, 14, 11, 6 -- -- -- 4 5 12 13 MAX313F 1, 16, 9, 8 2, 15, 10, 7 -- 3, 14, 11, 6 -- -- 4 5 12 13 MAX314F 1, 16, 9, 8 2, 15, 10, 7 -- -- 3, 6 14, 11 4 5 12 13 IN1, IN2, IN3, IN4 COM1, COM2, COM3, COM4 NC1, NC2, NC3, NC4 NO1, NO2, NO3, NO4 NO1, NO4 NC2, NC3 VGND N.C. V+ Logic-Control Digital Inputs Analog Switch Common Terminals Analog Switch Normally Closed Terminals Analog Switch Normally Open Terminals Analog Switch Normally Open Terminals Analog Switch Normally Closed Terminals Negative-Supply Voltage Input. Connect to GND for singlesupply operation. Bypass with a 0.1F capacitor to GND. Ground. Connect to digital ground. No Connection. Not internally connected. Positive-Supply Voltage Input. Bypass with a 0.1F capacitor to GND. FUNCTION
MAX312F/MAX313F/MAX314F
Detailed Description
The MAX312F/MAX313F/MAX314F are fault-protected CMOS analog switches with unique operation and construction. These switches differ considerably from traditional fault-protection switches, with several advantages. First, they are constructed with two parallel FETs, allowing very low on-resistance when the switch is on. Second, they allow signals on the NO_ or NC_ pins that are within, or slightly beyond, the supply rails to be passed through the switch to the COM_ terminal (or vice versa), allowing true rail-to-rail signal operation. Third, the MAX312F/MAX313F/MAX314F have the same fault-protection performance on any of the NO_, NC_, or COM_ switch inputs. Operation is identical for both fault polarities. The fault protection extends to 36V from GND with 15V supplies. During a fault condition, the particular overvoltage input (COM_, NO_, NC_) pin becomes high impedance regardless of the switch state or load resistance. When power is removed, the fault protection is still in effect. In this case, the COM_, NO_, or NC_ terminals are a virtual open circuit. The fault can be up to 40V with power off. The switches turn off when V+ is not powered, regardless of V-.
direct replacement in existing printed circuit boards since the NO_, NC_, and COM_ pins of each switch are fault protected.
Internal Construction
Internal construction is shown in Figure 1, with the analog signal paths shown in bold. A single NO switch is shown. The NC configuration is identical except the logic-level translator becomes an inverter. The analog switch is formed by the parallel combination of N-channel FET (N1) and P-channel FET (P1), which are driven on and off simultaneously according to the input fault condition and the logic-level state.
Normal Operation
Two comparators continuously compare the voltage on the COM_, NO_, and NC_ pins with V+ and V-. When the signal on COM_, NO_, or NC_ is between V+ and V-, the switch acts normally, with FETs N1 and P1 turning on and off in response to IN_ signals. The parallel combination of N1 and P1 forms a low-value resistor between NO_ (or NC_) and COM_ so that signals pass equally well in either direction.
Positive Fault Condition
When the signal on NO_ (or NC_) and COM_ exceeds V+, the high-fault comparator output is high, turning off FETs N1 and P1. This makes the NO_ (or NC_) and COM_ pins high impedance regardless of the switch
9
Pin Compatibility
These switches have identical pinouts to common nonfault-protected CMOS switches. They allow for carefree
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Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches MAX312F/MAX313F/MAX314F
state. If the switch state is off, all FETs are turned off and both NO_ (or NC_) and COM_ are high impedance.
Ground
There is no galvanic connection between the analog signal paths and GND. The analog signal paths consist of an N-channel and P-channel MOSFET with their sources and drains paralleled and their gates driven out of phase to V+ and V- by the logic-level translators. However, the potential of the analog signals must be defined or at least limited with respect to GND. V+ and GND power the internal logic and logic-level translators and set the input logic thresholds. The logiclevel translators convert the logic levels to switched V+ and V- signals to drive the gates of the analog switches. This drive signal is the only connection between the power supplies and the analog signals.
Negative Fault Condition
When the signal on NO_ (or NC_) and COM_ exceeds V-, the low-fault comparator output is high, turning off FETs N1 and P1. This makes the NO_ (or NC_) and COM_ pins high impedance regardless of the switch state. If the switch state is off, all FETs are turned off and both NO_ (or NC_) and COM_ are high impedance.
Transient Fault Response and Recovery
When a fast rise-time and fall-time transient on NO_, NC_, or COM_ exceeds V+ or V-, the output follows the input to the supply rail with only a few nanoseconds delay. This delay is due to the switch on-resistance and circuit capacitance to ground. When the input transient returns to within the supply rails, however, there is a longer output recovery time delay. For positive faults, the recovery time is typically 1s. For negative faults, the recovery time is typically 0.6s. These values depend on the output resistance and capacitance, and are not production tested or guaranteed. The delays are not dependent on the fault amplitude. Higher load resistance and capacitance increase recovery times.
Bipolar Supplies
The MAX312F/MAX313F/MAX314F operate with bipolar supplies between 4.5V and 20V. The V+ and V- supplies need not be symmetrical, but their difference cannot exceed the absolute maximum rating of 44V.
Single Supply
The MAX312F/MAX313F/MAX314F operate from a single supply between +9V and +36V when V- is connected to GND.
Fault-Protection Voltage and Power Off
The maximum fault voltage on the NO_ (or NC_) and COM_ pins is 36V with power applied and 40V with power off.
Ordering Information (continued)
PART MAX313FESE MAX313FEPE MAX314FESE MAX314FEPE TEMP RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE 16 SO 16 Plastic DIP 16 SO 16 Plastic DIP
Failure Modes
Exceeding the fault-protection voltage limits on NO_, NC_, or COM_, even for very short periods, can cause the device to fail (see the Absolute Maximum Ratings). The failure modes may not be obvious, and failure in one switch may or may not affect other switches in the same package.
Chip Information
TRANSISTOR COUNT: 251 PROCESS: CMOS SUBSTRATE CONNECTED TO: V+
10
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Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches MAX312F/MAX313F/MAX314F
Test Circuits/Timing Diagrams
NORMALLY OPEN SWITCH CONSTRUCTION V+
HIGH FAULT P1 NO_ LOW FAULT COM_
N1
IN_
ON
GND
MAX312F MAX313F MAX314F
VESD DIODE
Figure 1. Functional Diagram
V+ V+ 3V NO_ OR NC_ 10V VIN_ 0V VIN_ MAX312F MAX313F MAX314F COM_ GND VVV- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION. RL CL 10V VOUT 0V tOFF tON 50%
VOUT
90%
90%
Figure 2. Switch Turn-On/Turn-Off Times
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11
Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches MAX312F/MAX313F/MAX314F
Test Circuits/Timing Diagrams (continued)
V+ VIN_ IN_ IN_ V+ 3V NO_ NC_ 10V VIN_ 50% 0V tF < 5ns tR < 5ns
MAX314F COM_ COM_ GND VVV- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION. RL CL VOUT
VNO_, VNC_
90%
VOUT 0V tBBM
Figure 3. MAX314F Break-Before-Make Interval
V+ VIN_ IN_ V+ RGEN NO_ OR NC_ MAX312F MAX313F MAX314F GND VGEN VOUT CL VV- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION. VOUT IS THE MEASURED VOLTAGE DUE TO CHARGETRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. Q = VOUT x CL VIN_ 0V COM_ VVOUT VOUT 3V
Figure 4. Charge Injection
V+ V+ V+ MAX312F NC_ MAX313F MAX314F COM_ GND VVV- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION. NO_
IN_
1MHz CAPACITANCE ANALYZER
Figure 5. COM_, NO_, NC_ Capacitance
12
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Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches
Test Circuits/Timing Diagrams (continued)
V+ 0.1F 50 RESISTOR ONLY NEEDED FOR CROSSTALK AND ISOLATION VIN V+ 3.0V MAX312F MAX313F MAX314F NO_, NC_ GND V50 VOUT MEAS REF COM_ 50
MAX312F/MAX313F/MAX314F
NETWORK ANALYZER 50
IN_
50 0.1F VMEASUREMENTS ARE STANDARDIZED AGAINST SHORT AND OPEN AT SOCKET TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM_ AND OFF NO_ OR NC_ TERMINALS. ON-RESPONSE IS MEASURED BETWEEN COM_ AND ON NO_ OR NC_ TERMINALS. CROSSTALK IS MEASURED BETWEEN COM_ TERMINALS WITH ALL SWITCHES ON. V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
50
Figure 6. Frequency Response, Off-Isolation, and Crosstalk
Pin Configurations (continued)
TOP VIEW
IN1 COM1 NO1 VGND NO4 COM4 IN4 1 2 3 4 5 6 7 8 16 IN2 15 COM2 14 NO2 13 V+ IN1 COM1 NO1 VGND NO4 COM4 IN4 1 2 3 4 5 6 7 8 16 IN2 15 COM2 14 NC2 13 V+
MAX313F
12 N.C. 11 NO3 10 COM3 9 IN3
MAX314F
12 N.C. 11 NC3 10 COM3 9 IN3
DIP/SO
MAX313F LOGIC SWITCH 0 1 OFF ON
DIP/SO
MAX314F SWITCHES SWITCHES 1, 4 2, 3 OFF ON ON OFF
LOGIC 0 1
N.C. = NOT CONNECTED. SWITCHES SHOWN FOR LOGIC 0 INPUT. ALL SWITCHES ARE OFF WITH POWER REMOVED.
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13
Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches MAX312F/MAX313F/MAX314F
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
PDIPN.EPS
14
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Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
16L SOIC.EPS
MAX312F/MAX313F/MAX314F
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 (c) 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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