MAXIM MAX312F, MAX313F, MAX314F Technical data

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 10Ω (max) and is matched
between switches to 0.5Ω (max) at +25°C.

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.

Applications

Communications Systems

Signal Routing

Test Equipment

Data Acquisition

Industrial and Process Control Systems

Avionics

Redundant/Backup Systems

ATE

Hot Swap

Features

♦ No Power-Supply Sequencing Required

♦ Rail-to-Rail Signal Handling

♦ All Switches Off with Power Off

♦ All Switches Off when V+ is Off and V- is On

♦ ±40V Fault Protection with Power Off

♦ ±36V Fault Protection with ±15V Supplies

♦ Control Line Fault Protection from

V- - 0.3V to V- + 40V

♦ Pin Compatible with Industry-Standard

DG411/DG412/DG413

♦ 600ns (typ) Fault Response Time

♦ 10Ω (max) RONwith ±15V Supplies

♦ ±4.5V to ±20V Dual Supplies

♦ +9V to +36V Single Supply

♦ TTL- and CMOS-Compatible Logic Inputs with

±15V or Single +9V to +15V Supplies

MAX312F/MAX313F/MAX314F

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

19-2737; Rev 0; 1/03

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Ordering Information

PART TEMP RANGE PIN-PACKAGE

-40°C to +85°C 16 SO

-40°C to +85°C 16 Plastic DIP

Pin Configurations

________________________________________________________________ Maxim Integrated Products 1

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

Pin Configurations continued at end of data sheet.

Functional Diagram appears at end of data sheet.

Ordering Information continued at end of data sheet.

MAX312FESE

MAX312FEPE

TOP VIEW

1

IN1

COM1

NC1

GND

NC4

COM4

IN4

2

3

V-

4

MAX312F

5

6

7

8

16

IN2

COM2

15

NC2

14

13

V+

N.C.

12

11

NC3

10

COM3

9

IN3

DIP/SO

MAX312F

LOGIC SWITCH

N.C. = NOT CONNECTED. SWITCHES SHOWN FOR LOGIC 0 INPUT.
ALL SWITCHES ARE OFF WITH POWER REMOVED.

0
1

ON
OFF

MAX312F/MAX313F/MAX314F

Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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 +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 (T

A

= +70°C)

16-Pin SO (derate 8.7mW/°C above +70°C)................696mW

16-Pin Plastic DIP (derate 10.53mW/°C

above +70°C) ........................................................ 842mW

Operating Temperature Range .......................... -40°C to +85°C

Junction Temperature .................................................... +150°C

Storage Temperature Range ........................... -65°C to +160°C

Lead Temperature (soldering, 10s) ............................... +300°C

ELECTRICAL CHARACTERISTICS—±15V Dual Supplies

(V+ = +15V, V- = -15V, VIH= +2.4V, VIL= +0.8V, GND = 0V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Notes 2, 3)

PARAMETER

SYM B O L

CONDITIONS T

A

MIN

TYP

MAX

UNITS

ANALOG SWITCH

Fault-Free Analog Signal Range

V

C OM _

,

EV- V+V

810

On-Resistance R

ON

I

COM_

= 10mA;

V

NO_

, V

NC_

= ±10V

E13

Ω

0.5

On-Resistance Match Between
Channels (Note 4)

∆R

ON

I

COM_

= 10mA;

V

NO_

, V

NC_

= ±10V

E

Ω

1

On-Resistance Flatness
(Note 5)

)

I

COM_

= 10mA;

V

NO_

, V

NC_

= ±5V, 0V

E

Ω

-1 +1

NO_, NC_ Off-Leakage Current

(Note 6)

I

NO_(OFF)

,

)

V

COM_

= ±10V;

V

NO_

, V

NC_

= ±10V

E -60 +60

nA

-1 +1

COM_ Off-Leakage Current
(Note 6)

)

V

COM_

= ±10V;

V

NO_

, V

NC_

= ±10V

E -60 +60

nA

-2 +2

COM_ On-Leakage Current
(Note 6)

)

V

COM_

= ±10V;

V

NO_

, V

NC_

= ±10V or floating

E -60 +60

nA

FAULT

V+ = +15V, V- = -15V E -36 +36

V+ = 0V, V- = -15V E -36 +36

Fault-Protected Analog Signal
Range

V

COM_

,

V+ = V- = 0V E -40 +40

V

-1 +1

NO_ or NC_ Off-Leakage
Current (Note 6)

I

NO_(OFF)

,

)

V

NO_

, V

NC_

= ±36V; V+ = +15V,

0V; V- = -15V

E -10 +10

µA

-1 +1

COM_ Off-Leakage Current
(Note 6)

)

V

COM_

= ±36V; V+ = +15V, 0V;

V- = -15V

E -10 +10

µA

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.

V

, V

N O_

N C _

+25°C

R

FLAT(ON

+25°C 0.05

+25°C 0.25

+25°C

I

NC_(OFF

I

COM_(OFF

I

COM_(ON

V

NO_, VNC_

I

NC_(OFF

I

COM_(OFF

+25°C

+25°C

+25°C

+25°C

0.75

1.25

MAX312F/MAX313F/MAX314F

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—±15V Dual Supplies (continued)

(V+ = +15V, V- = -15V, VIH= +2.4V, VIL= +0.8V, GND = 0V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Notes 2, 3)

PARAMETER

SYM B O L

CONDITIONS T

A

MIN

TYP

MAX

UNITS

-1 +1

NO_ or NC_ Leakage Current
(Note 6)

E -10 +10

µA

-1 +1

COM_ Leakage Current
(Note 6)

I

COM_

V

COM_

= ±40V; V+ = V- = 0V

E -10 +10

µA

Fault-Trip Threshold E

V

± Fault Response Time t

RES

V

NO_

, V

NC_

= ±36V; RL = 300Ω E

ns

± Fault Recovery Time t

REC

V

NO_

, V

NC_

= ±36V; RL = 300Ω E1µs

SWITCH DYNAMICS

225

Turn-On Time t

ON

V

NO_

or V

NC_

= ±10V, RL = 300Ω,

C

L

= 35pF, Figure 2

E 275

ns

70 185

Turn-Off Time t

OFF

V

NO_

or V

NC_

= ±10V, RL = 300Ω,

C

L

= 35pF, Figure 2

E 235

ns

545

Break-Before-Make Time Delay
(MAX314F Only) (Note 7)

t

BBM

V

NO_

or V

NC_

= ±10V, RL = 100Ω,

C

L

= 10pF, Figure 3

E2

ns

Charge Injection Q

V

GE N

= 0V , R

GE N

= 0Ω, C L = 1nF,

Figure 4

70 pC

NO_ or NC_ Off-Capacitance

)

f = 1MHz, Figure 5

20 pF

COM_ Off-Capacitance

)

f = 1MHz, Figure 5

20 pF

COM_ On-Capacitance

)

f = 1MHz, Figure 5

43 pF

Off-Isolation (Note 8) V

ISO

f = 1MHz, RL = 50Ω, CL = 15pF,
P

IN

= 0dBm, Figure 6

-55 dB

Channel-to-Channel Crosstalk
(Note 9)

V

CT

f = 1MHz, RL = 50Ω, CL = 15pF,
P

IN

= 0dBm, Figure 6

dB

LOGIC INPUT

Input Logic High V

IH

E 2.4 V

Input Logic Low V

IL

E 0.8 V

Input Leakage Current I

IN

V

IN_

= 0V or V+ E -1 +1 µA

POWER SUPPLY

Power-Supply Range V+, V- E

±20 V

500

All V

IN_

= +5V, V

COM_

= 0V

E 700

250

V+ Supply Current I+

All V

IN_

= 0V or V+, V

COM_

= 0V

E 350

µA

I

NO_

, I

NC_VNO_

, V

NC_

C

N_(OFF

C

COM_(OFF

C

COM_(ON

= ±40V; V+ = V- = 0V

+25°C

+25°C

V- - 0.4 V+ + 0.4

+25°C 115

+25°C

+25°C

+25°C

+25°C

+25°C

+25°C

+25°C

+25°C -104

±4.5

+25°C 340

+25°C 140

600

MAX312F/MAX313F/MAX314F

Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches

4 _______________________________________________________________________________________

PARAMETER

SYM B O L

CONDITIONS T

A

MIN

TYP

MAX

UNITS

ANALOG SWITCH

V

COM_

,

E 0 V+ V

16 25

On-Resistance R

ON

I

COM_

= 10mA;

V

NO_

, V

NC_

= +10V

E30

Ω

0.4 1.5

On-Resistance Match Between
Channels (Note 4)

∆R

ON

I

COM_

= 10mA;

V

NO_

, V

NC_

= +10V

E2

Ω

36

On-Resistance Flatness

)

I

COM_

= 10mA;

V

NO_

, V

NC_

= +2V, +6V, +10V

E7

Ω

-1 +1

NO_, NC_ Off-Leakage Current
(Note 6)

I

NO_(OFF)

,

)

V

COM_

= +1V, +10V;

V

NO_

, V

NC_

= +10V, +1V

E -60

nA

-1 +1

COM_ Off-Leakage Current
(Note 6)

)

V

COM_

= +1V, +10V;

V

NO_

, V

NC_

= +10V, +1V

E -60

nA

-2 +2

COM_ On-Leakage Current
(Note 6)

)

V

COM_

= +1V, +10V;

V

NO_

, V

NC_

= +1V, +10V,

or floating

E -60

nA

FAULT

V+ = +12V, V- = 0V E -36

Fault-Protected Analog
Signal Range

V

COM_

,

V+ = V- = 0V E -40

V

-1 +1

NO_ or NC_ Off-Leakage
Current (Note 6)

I

NO_(OFF)

,

)

V

NO_

, V

NC_

= ±36V; V+ = +12V;

V- = 0V

E -10

µA

-1 +1

COM_ Off-Leakage Current
(Note 6)

)

V

NO_

, V

NC_

= ±36V; V+ = +12V;

V- = 0V

E -10

µA

-1 +1

NO_ or NC_ Leakage Current
(Note 6)

E -10

µA

ELECTRICAL CHARACTERISTICS—Single +12V Supply

(V+ = +12V, V- = 0V, VIH= +2.4V, VIL= +0.8V, GND = 0V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Notes 2, 3)

ELECTRICAL CHARACTERISTICS—±15V Dual Supplies (continued)

(V+ = +15V, V- = -15V, VIH= +2.4V, VIL= +0.8V, GND = 0V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Notes 2, 3)

V- Supply Current I-

GND Supply Current I

PARAMETER SYM B O L CONDITIONS T

All V

= +5V, V

IN_

All V

= 0V or V+, V

IN_

All V

= +5V, V

IN_

GND

All V

= 0V or V+, V

IN_

COM_

COM_

= 0V

COM_

= 0V

COM_

= 0V

= 0V

+25°C 140 200

E 300

+25°C 140 250

E 350

+25°C 200 300

E 400

+25°C01

E10

A

Fault-Free Analog Signal Range

V

, V

NO_

R

FLAT(ON

I

NC_(OFF

I

COM_(OFF

I

COM_(ON

V

NO_, VNC_

I

NC_(OFF

I

COM_(OFF

NC_

I

NO_, INC_

V+ = V- = 0V; V

+25°C

+25°C

+25°C

+25°C

+25°C

+25°C

+25°C

+25°C

+25°C

NO_

, V

= ±40V

NC_

MIN TYP MAX UNITS

+60

+60

+60

+36

+40

+10

+10

+10

µA

µA

MAX312F/MAX313F/MAX314F

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

_______________________________________________________________________________________ 5

Note 2: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 3: Electrical specifications at -40°C are guaranteed by design and not production tested.
Note 4: ∆R

ON

= R

ON(MAX)

- R

ON(MIN).

Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance over the specified analog

signal range.

Note 6: Single-supply leakage parameters are guaranteed by testing with dual supplies at the maximum rated temperature.
Note 7: Guaranteed by design.
Note 8: Off-isolation = 20 log

10

[V

COM

/(VNCor VNO)], VNCor V

NO

= output, V

COM

= input to off switch.

Note 9: Between any two switches.

ELECTRICAL CHARACTERISTICS—Single +12V Supply (continued)

(V+ = +12V, V- = 0V, VIH= +2.4V, VIL= +0.8V, GND = 0V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Notes 2, 3)

PARAMETER

CONDITIONS T

A

UNITS

-1 +1

COM_ Leakage Current
(Note 6)

I

COM_

E -10

µA

Fault Response Time t

RES

V

NO_

, V

NC_

= +36V; RL = 300Ω E

ns

Fault Recovery Time t

REC

V

NO_

, V

NC_

= +36V; RL = 300Ω E1µs

SWITCH DYNAMICS

Turn-On Time t

ON

V

NO_

or V

NC_

= +10V, RL = 300Ω,

C

L

= 35pF, Figure 2

E

ns

75

Turn-Off Time t

OFF

V

NO_

or V

NC_

= +10V, RL = 300Ω,

C

L

= 35pF, Figure 2

E

ns

10 65

Break-Before-Make Time Delay
(MAX314F Only) (Note 6)

t

BBM

V

NO_

or V

NC_

= +10V, RL = 100Ω,

C

L

= 10pF, Figure 3

E5

ns

Charge Injection Q

V

GEN

= 0V, R

GEN

= 0Ω, CL = 1nF,

Figure 4

-10 pC

LOGIC INPUT

Input Logic High V

IH

E 2.4 V

Input Logic Low V

IL

E 0.8 V

Input Leakage Current
(Note 6)

I

IN

V

IN_

= 0V or V+ E -1 +1 µA

POWER SUPPLY

Power-Supply Range V+ E +9

V

All V

IN_

= +5V, V

COM_

= +6V

E

70

V+ Supply Current I+

E

µA

SYM B O L

V+ = V- = 0V; V

NO_

, V

NC_

= ±40V

+25°C

+25°C 140 325

+25°C

+25°C

+25°C

+25°C 160 300

All V

= 0V or V+, V

IN_

= +6V

COM_

+25°C

MIN TYP MAX

200

+10

425

175

225

+36

400

150

250

MAX312F/MAX313F/MAX314F

Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches

6 _______________________________________________________________________________________

Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

0

100

300

200

400

500

TURN-ON/TURN-OFF TIME

vs. SUPPLY VOLTAGE (DUAL SUPPLIES)

MAX312F/13F/14F toc09

SUPPLY VOLTAGE (V+, V-)

t

ON

/t

OFF

(ns)

5101520

t

ON

t

OFF

1.0

1.5

2.0

2.5

3.0

0 102030515253540

LOGIC-LEVEL THRESHOLD VOLTAGE

vs. SUPPLY VOLTAGE

MAX312F/13F/14F toc08

SUPPLY VOLTAGE (V)

THRESHOLD VOLTAGE (V)

DUAL SUPPLIES

SINGLE SUPPLY

-300

-200

-100

0

100

200

300

400

500

-40 -15 10 35 60 85

SUPPLY CURRENT vs. TEMPERATURE

MAX312F/13F/14F toc07

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

DUAL SUPPLIES:
V+ = +15V, V- = -15V, V

IN_

= +5V

I+

I-

I

GND

-100

0

-50

100

50

150

200

-15 -5 0-10 5 10 15

CHARGE INJECTION vs. V

COM

MAX312F/13F/14F toc06

V

COM

(V)

Q (pC)

DUAL SUPPLIES: ±15V

SINGLE SUPPLY: +12V

ON/OFF-LEAKAGE CURRENT

vs. TEMPERATURE

MAX312F/13F/14F toc05

TEMPERATURE (°C)

LEAKAGE CURRENT (pA)

603510-15

0.1

1

10

100

1000

10,000

0.01

-40 85

DUAL SUPPLIES:
V+ = +15V, V- = -15V

I

NO(OFF)

,

I

NC(OFF)

I

COM(OFF)

I

COM(ON)

0

5

15

10

20

25

042681012

ON-RESISTANCE vs. V

COM

AND TEMPERATURE

(SINGLE SUPPLY)

MAX312F/13F/14F toc04

V

COM

(V)

R

ON

(Ω)

TA = +85°C

TA = +25°C

TA = -40°C

V+ = +12V
V- = 0V

0

10

5

20

15

25

30

012186 243036

ON-RESISTANCE vs. V

COM

(SINGLE SUPPLY)

MAX312F/13F/14F toc03

V

COM

(V)

R

ON

(Ω)

V+ = +36V
V- = 0V

V+ = +28V
V- = 0V

V+ = +24V
V- = 0V

V+ = +9V
V- = 0V

V+ = +12V
V- = 0V

V+ = +15V
V- = 0V

0

3

9

6

12

15

-15 -5-10 0 5 10 15

ON-RESISTANCE vs. V

COM

AND TEMPERATURE

(DUAL SUPPLIES)

MAX312F/13F/14F toc02

V

COM

(V)

R

ON

(Ω)

TA = +85°C

V+ = +15V
V- = -15V

TA = +25°C

TA = -40°C

0

5

15

10

20

25

-20 -10 -5-15 0 5 10 15 20

ON-RESISTANCE vs. V

COM

(DUAL SUPPLIES)

MAX312F/13F/14F toc01

V

COM

(V)

R

ON

(Ω)

V+ = +5V
V- = -5V

V+ = +10V

V- = -10V

V+ = +15V
V- = -15V

V+ = +20V
V- = -20V

MAX312F/MAX313F/MAX314F

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

_______________________________________________________________________________________ 7

Typical Operating Characteristics (continued)

(TA = +25°C, unless otherwise noted.)

-200

-150

-100

-50

0

50

100

150

200

-60 -20-40 0 204060

FAULT CURRENT vs. FAULT VOLTAGE

(SINGLE SUPPLY)

MAX312F/13F/14F toc16

V

COM

(V)

I

COM

(µA)

+12V SINGLE SUPPLY

FOR 0V < V

COM

< V

SUPPLY

,

I

COM

= V

COM/RL

-200

-150

-100

-50

0

50

100

150

200

-60 -20-40 0 204060

FAULT CURRENT vs. FAULT VOLTAGE

(DUAL SUPPLIES)

MAX312F/13F/14F toc15

V

COM

(V)

I

COM

(µA)

DUAL SUPPLIES:
V+ = +15V, V- = -15V

FOR |V

COM

| < V

SUPPLY

,

I

COM

= V

COM/RL

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

MAX312F/13F/14F toc14

FREQUENCY (Hz)

THD + N (%)

1k100

0.001

10k10

0.01

0.0001

±15V DUAL SUPPLIES:
IN = OUT = 600Ω, V

P-P

= 5V

FREQUENCY RESPONSE

MAX312F/13F/14F toc13

FREQUENCY (MHz)

LOSS (dB)

1001010.10.01

-80

-60

-40

-20

0

20

-100

0.001 1000

V+ = +15V, V- = -15V

-120

ON-RESPONSE

OFF-ISOLATION

CROSSTALK

0

40

120

80

160

200

-40 10-15 35 60 85

MAX312F/13F/14F toc12

TEMPERATURE (°C)

TURN-ON/TURN-OFF TIME

vs. TEMPERATURE (SINGLE SUPPLY)

t

ON

/t

OFF

(ns)

t

OFF

t

ON

V+ = +12V, V- = 0V

0

50

150

100

200

250

-40 10-15 35 60 85

MAX312F/13F/14F toc11

TEMPERATURE (°C)

TURN-ON/TURN-OFF TIME

vs. TEMPERATURE (DUAL SUPPLIES)

t

ON

/t

OFF

(ns)

t

OFF

t

ON

DUAL SUPPLIES: ±15V

0

40

120

80

160

200

TURN-ON/TURN-OFF TIME

vs. SUPPLY VOLTAGE (SINGLE SUPPLY)

MAX312F/13F/14F toc10

SUPPLY VOLTAGE (V+)

t

ON

/t

OFF

(ns)

9182736

t

ON

t

OFF

V- = GND

MAX312F/MAX313F/MAX314F

Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(TA = +25°C, unless otherwise noted.)

200µs/div

FAULT RESPONSE

(V+ = 0V, V- = -15V)

V

NO_

, V

NC_

INPUT

GND

MAX312F/13F/14F toc22

V

COM_

OUTPUT
500mV/div

GND

+25V

-25V

1µs/div

FAULT RESPONSE TIME

(NEGATIVE INPUT)

V

NO_

, V

NC_

INPUT

GND

MAX312F/13F/14F toc21

V

COM_

OUTPUT
10V/div

10V/div

GND

400ns/div

FAULT RESPONSE TIME

(POSITIVE INPUT)

V

NO_

, V

NC_

INPUT

GND

MAX312F/13F/14F toc20

V

COM_

OUTPUT
10V/div

10V/div

GND

1

µs/div

FAULT RECOVERY TIME

(NEGATIVE INPUT)

-25V

V

NO_

, V

NC_

INPUT

GND

MAX312F/13F/14F toc19

V

COM_

OUTPUT

GND

-5V

-5V

1

µs/div

FAULT RECOVERY TIME (POSITIVE INPUT)

+25V

V

NO_

, V

NC_

INPUT

GND

+5V

+5V

GND

MAX312F/13F/14F toc18

V

COM_

OUTPUT

2ms/div

INPUT OVERVOLTAGE vs. OUTPUT

+25V

V

NO_

, V

NC_

INPUT

GND

-25V

+15V

GND

-15V

MAX312F/13F/14F toc17

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-.

Pin Compatibility

These switches have identical pinouts to common non­fault-protected CMOS switches. They allow for carefree

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

MAX312F/MAX313F/MAX314F

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

_______________________________________________________________________________________ 9

PIN

MAX312F

NAME FUNCTION

1, 16, 9, 8

IN1, IN2, IN3, IN4 Logic-Control Digital Inputs

2, 15, 10, 7

COM1, COM2, COM3,

COM4

Analog Switch Common Terminals

3, 14, 11, 6

——

Analog Switch Normally Closed Terminals

—

—

Analog Switch Normally Open Terminals

——3, 6 NO1, NO4 Analog Switch Normally Open Terminals

——14, 11 NC2, NC3 Analog Switch Normally Closed Terminals

444 V-

Negative-Supply Voltage Input. Connect to GND for single­supply operation. Bypass with a 0.1µF capacitor to GND.

5 5 5 GND Ground. Connect to digital ground.

12 12 12 N.C. No Connection. Not internally connected.

13 13 13 V+

Positive-Supply Voltage Input. Bypass with a 0.1µF capacitor
to GND.

Pin Description

MAX313F MAX314F

1, 16, 9, 8 1, 16, 9, 8

2, 15, 10, 7 2, 15, 10, 7

NC1, NC2, NC3, NC4

3, 14, 11, 6

NO1, NO2, NO3, NO4

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.

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 1µs. For negative faults,
the recovery time is typically 0.6µs. 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.

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.

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.

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.

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.

Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches

10 ______________________________________________________________________________________

Ordering Information (continued)

PART TEMP RANGE PIN-PACKAGE

MAX313FESE

-40°C to +85°C 16 SO

MAX313FEPE

-40°C to +85°C 16 Plastic DIP

MAX314FESE

-40°C to +85°C 16 SO

MAX314FEPE

-40°C to +85°C 16 Plastic DIP

Chip Information

TRANSISTOR COUNT: 251

PROCESS: CMOS

SUBSTRATE CONNECTED TO: V+

MAX312F/MAX313F/MAX314F

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

______________________________________________________________________________________ 11

Test Circuits/Timing Diagrams

Figure 1. Functional Diagram

NORMALLY OPEN SWITCH CONSTRUCTION

COM_

MAX312F
MAX313F
MAX314F

P1

N1

ON

LOW

FAULT

HIGH

FAULT

V+

NO_

IN_

GND

ESD DIODE

V-

Figure 2. Switch Turn-On/Turn-Off Times

50%

t

ON

3V

0V

V

IN_

0V

90%

t

OFF

V

IN_

V+

GND

V+

NO_ OR NC_

COM_

10V

R

L

C

L

V-

V-

V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.

10V

V

OUT

V

OUT

90%

MAX312F
MAX313F
MAX314F

MAX312F/MAX313F/MAX314F

Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches

12 ______________________________________________________________________________________

Test Circuits/Timing Diagrams (continued)

Figure 3. MAX314F Break-Before-Make Interval

V

IN_

V+

GND

V+

NO_

COM_

10V

R

L

C

L

V-

V-

V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.

V

OUT

COM_

NC_

IN_
IN_

50%

3V

0V

V

NO_

, V

NC_

V

OUT

V

IN_

0V

90%

t

BBM

tR < 5ns

t

F

< 5ns

MAX314F

Figure 4. Charge Injection

V

IN_

V+

GND

V+

NO_ OR NC_

COM_

C

L

V-

V-

V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.

V

OUT

IN_

R

GEN

V

GEN

0V

3V

∆V

OUT

V

IN_

V

OUT

∆V

OUT

IS THE MEASURED VOLTAGE DUE TO CHARGE-

TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF.

Q = ∆V

OUT

x C

L

MAX312F
MAX313F
MAX314F

Figure 5. COM_, NO_, NC_ Capacitance

V+

GND

V+

NO_

COM_

V-

V-

V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.

IN_

NC_

V+

1MHz

CAPACITANCE

ANALYZER

MAX312F
MAX313F
MAX314F

MAX312F/MAX313F/MAX314F

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

______________________________________________________________________________________ 13

Test Circuits/Timing Diagrams (continued)

Figure 6. Frequency Response, Off-Isolation, and Crosstalk

V+

GND

V+

COM_

NO_, NC_

V-

V-

MEASUREMENTS 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.

IN_

0.1µF

0.1µF

V

IN

V

OUT

NETWORK
ANALYZER

50Ω 50Ω

50Ω 50Ω

MEAS REF

50Ω

50Ω RESISTOR
ONLY NEEDED
FOR CROSSTALK
AND ISOLATION

3.0V

MAX312F
MAX313F
MAX314F

Pin Configurations (continued)

TOP VIEW

1

IN1

2

COM1

3

NO1

V-

4

MAX313F

5

GND

6

NO4

7

COM4

8

IN4

16

IN2

15

COM2

14

NO2

13

V+

12

N.C.

11

NO3

10

COM3

9

IN3

IN1

COM1

NO1

GND

NO4

COM4

IN4

1

2

3

V-

4

MAX314F

5

6

7

8

16

IN2

15

COM2

14

NC2

13

V+

12

N.C.

11

NC3

10

COM3

9

IN3

DIP/SO

MAX313F

LOGIC SWITCH

0
1

N.C. = NOT CONNECTED. SWITCHES SHOWN FOR LOGIC 0 INPUT.
ALL SWITCHES ARE OFF WITH POWER REMOVED.

OFF

ON

LOGIC

0
1

DIP/SO

MAX314F

SWITCHES

1, 4

OFF

ON

SWITCHES

2, 3

ON

OFF

MAX312F/MAX313F/MAX314F

Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches

14 ______________________________________________________________________________________

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

MAX312F/MAX313F/MAX314F

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

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

© 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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