Datasheet MAX4533MJP, MAX4533ESP, MAX4533EPP, MAX4533EAP, MAX4533CSP Datasheet (Maxim)

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General Description

The MAX4533 quad, single-pole/double-throw (SPDT),
fault-protected analog switch is pin-compatible with the
industry-standard MAX333 and MAX333A. The MAX4533
features fault-protected inputs and Rail-to-Rail®signal
handling. The normally open (NO_ ) and normally closed
(NC_ ) terminals are protected from overvoltage faults up
to ±25V with power on and up to ±40V with power off.
During a fault condition, NO_ and NC_ become high
impedance with only nanoamperes of leakage current
flowing to the source. In addition, the output (COM_)
clamps to the appropriate polarity supply rail and pro­vides up to ±10mA of load current. This ensures unam­biguous rail-to-rail outputs when a fault occurs.

The MAX4533 operates from dual ±4.5V to ±18V power
supplies or a single +9V to +36V supply. All digital inputs
have +0.8V and +2.4V logic thresholds, ensuring both
TTL and CMOS logic compatibility when using ±15V
supplies or a +12V supply. On-resistance is 175Ω max
and is matched between switches to 10Ω max. The off­leakage current is only 0.5nA at TA= +25°C and 10nA at
TA=+85°C.

Applications

Redundant/Backup Systems Portable Instruments

Test Equipment Data-Acquisition
Communications Systems

Systems

Industrial and Process Control Avionics Systems

Features

♦ Rail-to-Rail Signal Handling
♦ ±40V Fault Protection with Power Off

±25V Fault Protection with ±15V Supplies

♦ All Switches Off with Power Off
♦ No Power-Supply Sequencing Required During

Power-Up or Power-Down

♦ Output Clamped to Appropriate Supply Voltage

During Fault Condition—No Transition Glitch

♦ 1kΩ (typ) Output Clamp Resistance During

Overvoltage

♦ 175Ω (max) Signal Paths with ±15V Supplies
♦ 20ns (typ) Fault Response Time
♦ ±4.5V to ±18V Dual Supplies

+9V to +36V Single Supply

♦ Pin-Compatible with Industry-Standard

MAX333/MAX333A

♦ TTL/CMOS-Compatible Logic Inputs with ±15V or

Single +9V to +15V Supplies

MAX4533

†

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

SPDT Analog Switch

________________________________________________________________

Maxim Integrated Products

1

SWITCHES ARE SHOWN WITH LOGIC "0" INPUT
N.C. = NOT INTERNALLY CONNECTED

20
19
18
17
16
15
14
13
12
11

1
2
3
4
5
6
7
8
9

10

IN4
NO4
COM4
NC4

NC1

COM1

NO1

IN1

MAX4533

V+
N.C.
NC3

COM3

COM2

NC2

GND

V-

NO3

IN3

IN2

NO2

TOP VIEW

SSOP/SO/DIP/CERDIP

Typical Operating Circuit

19-1452; Rev 0; 4/99

PART

MAX4533CAP
MAX4533CSP 0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

20 SSOP
20 Wide SO

Ordering Information continued at end of data sheet.

Pin Configuration/

Functional Diagram

Ordering Information

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

†

Patent Pending

INPUTS

V1

V2

OSC

IN

MAX4533

V3

V4

FLYING CAPACITOR LEVEL TRANSLATOR

(2-CHANNEL)

OUTPUTS
V1 - V2

V3 - V4

MAX4533

Quad, Rail-to-Rail, Fault-Protected,
SPDT Analog Switch

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—Dual Supplies

(V+ = +15V, V- = -15V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.) (Note 3)

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

V-.........................................................................-44.0V to +0.3V

V+ to V-................................................................-0.3V to +44.0V

COM_, IN_ (Note 1)............................. (V- - 0.3V) to (V+ + 0.3V)

NC_, NO_ (Note 2)..................................(V+ - 40V) to (V- + 40V)

NC_, NO_ to COM_.................................................-40V to +40V

NC_, NO_ Overvoltage with Switch Power On

(supplies at ±15V)................................................-30V to +30V

NC_, 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)....................................±50mA

Continuous Power Dissipation (T

A

= +70°C)

SSOP (derate 10.53mW/°C above +70°C) ...................842mW

Wide SO (derate 10.00mW/°C above +70°C).............. 800mW

Plastic DIP (derate 11.11mW/°C above +70°C) ...........889mW

CERDIP (derate 11.11mW/°C above +70°C)................889mW

Operating Temperature Ranges

MAX4533C_ _ ......................................................0°C to +70°C

MAX4533E_ _ ...................................................-40°C to +85°C

MAX4533M_ _.................................................-55°C to +125°C

Storage Temperature Range.............................-65°C to +150°C

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

VNO_ or VNC_ = ±10V,
I

COM

_ = 1mA

V+ = +15V, V- = -15V,
VNO_ or VNC_ = ±15V

V

COM_

= +5V, 0, -5V,

I

COM_

= 1mA

V

NO_

or V

NC_

= ±14V,

V

COM_

= 14V

CONDITIONS

Ω

125 175

R

ON

COM_ to NO_ or COM_ to NC_
On-Resistance

VV- V+V

NO

_

, V

NC

_

Fault-Free Analog Signal Range
(Note 2)

-200 200

250

Ω4On-Resistance Flatness

nA

-0.5 0.02 0.5

I

NO_(OFF),

I

NC_(OFF)

NO_ or NC_ Off-Leakage
Current (Note 5)

-10 10

UNITSMIN TYP MAXSYMBOLPARAMETER

+25°C

C, E, M

M

M

+25°C
+25°C

C, E

T

A

C, E 200

+25°C

VNO_ or VNC_ = ±10V,
I

COM

_ = 1mA

M

C, E 10

Ω

16

∆R

ON

COM_ to NO_ or COM_ to NC_
On-Resistance Match Between
Channels (Note 4)

15

M

V

COM_

= ±14V,

V

NO_

or V

NC_

= ±14V or floating

+25°C

C, E

-400 400

nA

-0.5 0.01 0.5

I

COM_(ON)

COM_ On-Leakage Current
(Note 5)

-20 20

+25°C -25 +25Applies with power on

V

NO_

, V

NC_

V

Fault-Protected Analog Signal
Range (Note 2)

M

V

NO_

or V

NC_

= ±25V,

no connection to “ON” channel

+25°C

C, E

-10 10

-10 10

-200 200

I

COM_

nA

COM_ Output Leakage Current,
Supplies On

M

V

NO_

or V

NC_

= ±25V,

V

COM_

= 10V

+25°C

C, E

-10 10

-20 20

I

NO_, INC_

-200 200
µA

nA

NO_ or NC_ Off Input Leakage
Current, Supplies On

Applies with power off +25°C -40 +40

µA

ANALOG SWITCH

FAULT

Note 1: COM_ and IN_ pins are not fault protected. Signals on COM_ or IN_ exceeding V+ or V- are clamped by internal diodes.

Limit forward diode current to maximum current rating.

Note 2: NC_ and NO_ pins are fault protected. Signals on NC_ or NO_ exceeding -25V to +25V may damage the device. These

limits apply with power applied to V+ or V-. The limit is ±40V with V+ = V- = 0.

±

±

MAX4533

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

SPDT Analog Switch

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)

(V+ = +15V, V- = -15V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.) (Note 3)

CONDITIONS T

A

UNITSMIN TYP MAXSYMBOLPARAMETER

+25°C

+25°C

C, E

1.0 2.5

-20 0.1 20

I

NO_, INC_

-200 200

NO_ or NC_ Input Leakage
Current, Supplies Off

COM_ On-Clamp Output
Resistance, Supplies On

nA

+25°C

V

NO_

or VNC= ±25V

C, E, M

20

3

R

COM_

ns

kΩ

RL= 10kΩ,
V

NO_

or V

NC_

= ±25V

±Fault Output Clamp Turn-On
Delay Time (Note 6)

C, E, M 2.4 VV

IN_H

IN_ Input Logic Threshold High

+25°C 100 250

C, E 400

M

+25°C

600

10 50

V

COM_

= ±10V,

RL= 1kΩ; Figure 3

t

BBM

Break-Before-Make Time Delay ns

RL= 10kΩ,
V

NO_

or V

NC_

= ±25V

+25°C 2.5 µs

±Fault Recovery Time
(Note 6)

C, E, M 0.8 VV

IN_L

IN_ Input Logic Threshold Low

V

IN_

= +0.8V or +2.4V

+25°C -1 0.03 1

I

IN_H, IIN_L

µA

IN_ Input Current Logic High or
Low

C, E, M -5 5

V

COM_

= ±10V,

RL= 2kΩ; Figure 2

t

ON

Turn-On Time ns

RL= 50Ω, CL= 15pF,
VN_= 1V

RMS

, f = 1MHz;

Figure 6

f = 1MHz; Figure 5

V

ISO

C

N_(OFF)

Off-Isolation (Note 7)

NO_ or NC_ Off-Capacitance

dB

pF+25°C 5

+25°C -62

+25°C 60 150

V

NO_

= ±10V,

RL= 2kΩ; Figure 2

t

OFF

Turn-Off Time nsC, E 300

M 450

±4.5 ±18 VV+, V-Power-Supply Range

C, E, M

+25°C

600

400

µA

All V

IN_

= 0 or +5V,

V

NO_

= V

NC_

= 0

C, E, M

+25°C

1000

600

µA

All V

IN_

= 0 or +5V,

V

NO_

= V

NC_

= 0

I+V+ Supply Current

I-V- Supply Current

+25°C 1.5

CL= 100pF,
V

COM_

= 0; Figure 4

Q pCCharge Injection (Note 6)

f = 1MHz; Figure 5C

COM_(ON)

COM_ On-Capacitance pF+25°C 12

RL= 50Ω, CL= 15pF,
VN_= 1V

RMS

, f = 1MHz;

Figure 6

V

CT

Channel-to-Channel Crosstalk
(Note 8)

dB+25°C -66

C, E, M

+25°C

450

300

µA

All V

IN_

= 0 or +5V,

V

NO_

= V

NC_

= 0

I

GND

GND Supply Current

V

NO_

or V

NC_

= +25V +25°C

+25°C

81113

I

COM_

-12 -10 -7

COM_ On-Clamp Output
Current, Supplies On

V

NO_

or V

NC_

= -25V

mA

V

NO_

or V

NC_

= ±40V,

V+ = 0, V- = 0

M -10 10 µA

LOGIC INPUT

SWITCH DYNAMIC CHARACTERISTICS

POWER SUPPLY

MAX4533

Quad, Rail-to-Rail, Fault-Protected,
SPDT Analog Switch

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—Single Supply

(V+ = +12V, V- = 0, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.) (Note 3)

+25°C

C, E, M

V+ = +12V,
VNO_ or VNC_ = +10V,
I

COM

_ = 1mA

M

V+ = +12V,
V

COM_

= +10V,

V

NO_

or V

NC_

= +10V or floating

V+ = +12V, V- = 0,
VNO_ or VNC_ = +12V or 0

+25°C

C, E

-400 400

M

nA

-0.5 0.01 0.5

I

COM_(ON)

COM_ On-Leakage Current
(Notes 5, 9)

-20 20

Applies with power off

+25°C

V+ = +12V,
V

COM_

= +10V, +1V,

V

NO_

or V

NC_

= +1V, +10V

+25°C

CONDITIONS

M

+25°C

+25°C

C, E

T

A

C, E

V+ = +12V,
VNO_ or VNC_ = +10V,
I

COM

_ = 1mA

M

450

C, E 20

Ω

410

∆R

ON

COM_ -NO_ On-Resistance
Match Between Channels
(Note 4)

30

-40 +40

-25 +25

µA

Applies with power on

V

NO_

, V

NC_

M

V

V

NO_

or V

NC_

= ±40V,

V+ = 0, V- = 0

Fault-Protected Analog Signal
Range (Note 2)

M

V

NO_

or V

NC_

= ±25V,
V+ = +12V,
no connection to “ON” channel

+25°C

C, E

-10 10

+25°C

-10 10

C, E

-10 10

-200 200

-20 0.1 20

I

NO_, INC_

-200 200

I

COM_

µA

nA

COM_ Output Leakage Current,
Supply On (Note 9)

nA

M

V

NO_

or V

NC_

= ±25V,
V

COM_

= 0,

V+ = +12V

+25°C

C, E

Ω

260 390

R

ON

COM_ to NO_, COM_ to NC_
On-Resistance

V0V+V

NO

_

, V

NC

_

Fault-Free Analog Signal Range
(Note 2)

-10 10

NO_ or NC_ Input Leakage
Current, Supply Off (Note 9)

-20 20

I

NO_, INC_

-200 200
µA

nA

NO_ or NC_ Off Input Leakage
Current, Supply On (Note 9)

-200 200

525

nA

-0.5 0.01 0.5

I

NO_(OFF),

I

NC_(OFF)

NO_ or NC_ Off-Leakage
Current (Notes 5, 9)

-10 10

UNITSMIN TYP MAXSYMBOLPARAMETER

+25°C 235

V

NO_

or V

NC_

= ±25V,

V+ = +12V

I

COM_

mA

COM_ On-Clamp Output
Current, Supply On

+25°C

C, E, M
C, E, M

-1 0.03 1

2.4V

IN_H

0.8
µA

VIN_ Input Logic Threshold High

V

IN_

= +0.8V or +2.4VI

IN_H, IIN_L

V

IN_L

V

IN_ Input Current Logic High or
Low

IN_ Input Logic Threshold Low

+25°C 2.4 5

V

NO_

or V

NC_

= ±25V,

V+ = +12V

R

COM_

kΩ

COM_ On-Clamp Output
Resistance, Supply On

C, E, M -5 5

ANALOG SWITCH

FAULT

LOGIC INPUT

MAX4533

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

SPDT Analog Switch

_______________________________________________________________________________________ 5

Note 3: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 4: ∆R

ON

= R

ON(MAX)

- R

ON(MIN)

.

Note 5: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at T

A

= +25°C.

Note 6: Guaranteed by design.
Note 7: Off-isolation = 20log10(V

COM_

/ V

NO_

), V

COM_

= output, V

NO_

= 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.

ELECTRICAL CHARACTERISTICS—Single Supply (continued)

(V+ = +12V, V- = 0, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.) (Note 3)

CONDITIONS T

A

+25°C 200 500

V

COM_

= +10V,

RL= 2kΩ; Figure 2

t

ON

Turn-On Time ns

C, E, M

+25°C

550

350

f = 1MHz; Figure 5

C, E, M

C

COM_(ON)

1000

RL= 50Ω, CL= 15pF,
V

NO_

= 1V

RMS

, f = 1MHz;

Figure 6

f = 1MHz; Figure 5

V

ISO

C

N_(OFF)

Off-Isolation (Note 7)

NO_ or NC_ Off-Capacitance

dB

µA

pF

All V

IN_

= 0 or +5V,

V

NO_

= V

NC_

= 0

C, E, M

I

GND

+25°C

V- and GND Supply Current

5 100

936

V

COM_

= +10V,

RL= 1kΩ; Figure 3

V

t

BBM

Break-Before-Make Time Delay ns

+25°C 5

RL= 50Ω, CL= 15pF,
V

NO_

= 1V

RMS

, f = 1MHz;

Figure 6

COM_ On-Capacitance

+25°C

V

CT

UNITSMIN TYP MAXSYMBOLPARAMETER

Channel-to-Channel Crosstalk
(Note 8)

-62

pF

dB+25°C

+25°C 15

-65

V+Power-Supply Range

C, E, M

+25°C

350

200

µA

All V

IN_

= 0 or +12V,

V

NO_

= V

NC_

= 0

C, E, M

+25°C

550

350

µA

All V

IN_

= 0 or +5V,

V

NO_

= V

NC_

= 0

I+V+ Supply Current

+25°C 2

CL= 100pF,
V

COM_

= 0; Figure 4

Q pCCharge Injection

+25°C 100 300

V

COM_

= +10V,

RL= 2kΩ; Figure 2

t

OFF

Turn-Off Time ns

C, E, M 900

SWITCH DYNAMIC CHARACTERISTICS

POWER SUPPLY

MAX4533

Quad, Rail-to-Rail, Fault-Protected,
SPDT Analog Switch

6 _______________________________________________________________________________________

Typical Operating Characteristics

(V+ = +15V, V- = -15V, TA = +25°C, unless otherwise noted.)

0

90
60
30

120

150

210
180

240

270

300

330

360

390

-18 -12 -9-15 -6-30369121518

ON-RESISTANCE vs. V

COM

(DUAL SUPPLIES)

MAX4533 toc01

V

COM

(V)

R

ON

(Ω)

V± = ±4.5V

V± = ±10V

V± = ±12V

V± = ±15V

V± = ±18V

0

100

50

200
150

250

300

350

400

010155 2025303540

ON-RESISTANCE vs. V

COM

(SINGLE SUPPLY)

MAX4533toc02

V

COM

(V)

R

ON

(Ω)

V- = 0

V+ = +12V

V+ = +15V

V+ = +20V

V+ = +25V

V+ = +30V

V+ = +36V

V+ = +9V

0

75
50
25

100

125

150

175

200

225

250

-15 -5-10 0 5 10 15

ON-RESISTANCE vs. V

COM

AND

TEMPERATURE (DUAL SUPPLIES)

MAX4533 toc03

V

COM

(V)

R

ON

(Ω)

V+ = +15V

V- = -15V

TA = +85°C

TA = +125°C

TA = +70°C

TA = +25°C

TA = 0°C

TA = -40°C

TA = -55°C

0

100

50

250
200
150

400
350
300

450

042681012

ON-RESISTANCE vs. V

COM

AND

TEMPERATURE (SINGLE SUPPLY)

MAX4533 toc04

V

COM

(V)

R

ON

(Ω)

TA = +125°C

TA = +70°C

TA = +85°C

TA = -40°C

TA = 0°C

TA = -55°C

TA = +25°C

V+ = +12V

V- = 0

0

200

100

400

300

500

600

±4 ±10 ±12±6 ±8 ±14 ±16 ±18

TURN-ON/TURN-OFF TIME vs.

SUPPLY VOLTAGE (DUAL SUPPLIES)

MAX4533 toc07a

SUPPLY VOLTAGE (V)

t

ON

, t

OFF

(ns)

t

ON

t

OFF

0.0001

0.01

0.001

1

0.1

100

10

1000

-55 -15 5-35 25 45 65 85 105 125

ON/OFF-LEAKAGE CURRENT

vs. TEMPERATURE

MAX4533 toc05

TEMPERATURE (°C)

LEAKAGE CURRENT (A)

I

COM_ON

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

I

COM_ON

(V+ = +12V, V- = 0)

I

NC_OFF

(V+ = +12V, V- = 0)

I

NC_OFF

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

0

1.0

0.5

2.0

1.5

3.0

2.5

3.5

4.5

4.0

5.0

-15 -10 -5 0 15510

CHARGE INJECTION vs. V

COM

MAX4533 toco6

V

COM

(V)

Q (pC)

SINGLE SUPPLY

DUAL SUPPLIES

0

50

150

100

200

250

81612 20 24 28 32 36

TURN-ON/TURN-OFF TIME vs.

SUPPLY VOLTAGE (SINGLE SUPPLY)

MAX4533 toc07b

SUPPLY VOLTAGE (V)

t

ON

, t

OFF

(ns)

t

ON

t

OFF

0

40
20

80
60

120
100

140

180
160

200

-55 -15 5 25-35 45 65 85 105 125

TURN-ON/TURN-OFF TIME vs.

TEMPERATURE (DUAL SUPPLIES)

MAX4533 toc08a

TEMPERATURE (°C)

t

ON

, t

OFF

(ns)

t

ON

t

OFF

V+ = +15V

V- = -15V

MAX4533

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

SPDT Analog Switch

_______________________________________________________________________________________

7

0

50

100

150

200

250

-55 25 45-15 5-35 65 85 105 125

TURN-ON/TURN-OFF TIME vs.

TEMPERATURE (SINGLE SUPPLY)

MAX4533 toc08b

TEMPERATURE (°C)

t

ON

, t

OFF

(ns)

t

ON

t

OFF

V+ = +12V

V- = 0

-500

-300

-400

-100

-200

100

0

200

400
300

500

-55 -15 5 25-35 45 65 85 105 125

POWER-SUPPLY CURRENT vs.

TEMPERATURE (DUAL SUPPLIES, V

IN

= 0)

MAX4533 toc09a

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

V+ = +15V

V- = -15V

I+

I

GND

I-

-600

-200

-400

200

0

600

400

800

-55 -15 5-35 25 45 65 85 105 125

POWER-SUPPLY CURRENT vs.

TEMPERATURE (DUAL SUPPLIES, V

IN

= +5V)

MAX4533 toc09b

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

I+

I

GND

I-

V+ = +15V

V- = -15V

0

100

50

250
200
150

350
300

400

-55 5 25-35 -15 45 65 85 105 125

POWER-SUPPLY CURRENT vs.

TEMPERATURE (SINGLE SUPPLY)

MAX4533 toc09c

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

I+

I

GND

V+ = +12V

V- = 0

V

IN

= +5V

0

1.0

0.5

2.0

1.5

2.5

3.0

4 8 12 16 20 24 28 32 36

LOGIC-LEVEL THRESHOLD

vs. SUPPLY VOLTAGE

MAX4533 toc10

SUPPLY VOLTAGE (V)

LOGIC-LEVEL THRESHOLD (V)

DUAL-SUPPLY

RANGE

SINGLE-SUPPLY

RANGE

COM_

(10V/div)

NO_ or

NC_

(10V/div)

OV

OV

OVERVOLTAGE WITH ±25V INPUT

MAX4533 toc11

5µs/div

Typical Operating Characteristics (continued)

(V+ = +15V, V- = -15V, TA = +25°C, unless otherwise noted.)

COM_

(10V/div)

NO_ or

NC_

(10V/div)

OV

OV

FAULT-FREE SIGNAL WITH ±15V INPUT

MAX4533 toc12

5µs/div

COM_

(10V/div)

NO_ or

NC_

(10V/div)

OV

OV

FAULT RECOVERY TIME

MAX4533 toc13

2µs/div

MAX4533

Quad, Rail-to-Rail, Fault-Protected,
SPDT Analog Switch

8 _______________________________________________________________________________________

0

-100

0.01 0.1 1 10 100 1000

FREQUENCY RESPONSE

(DUAL SUPPLIES)

-80

-90

-70

MAX4533 toc14a

FREQUENCY (MHz)

RESPONSE (dB)

-60

-50

-40

-30

-10

-20

BANDWIDTH

V+ = +15V

V- = -15V

CROSSTALK

OFF ISOLATION

Typical Operating Characteristics (continued)

(V+ = +15V, V- = -15V, TA = +25°C, unless otherwise noted.)

0

-100

0.01 0.1 1 10 100 1000

FREQUENCY RESPONSE

(SINGLE SUPPLY)

-80

-90

-70

MAX4533 toc14b

FREQUENCY (MHz)

RESPONSE (dB)

-60

-50

-40

-30

-10

-20

BANDWIDTH

V+ = +12V

V- = 0

CROSSTALK

OFF ISOLATION

Pin Description

Detailed Description

The MAX4533 is a fault-protected analog switch with
special operation and construction. Traditional fault-pro­tected switches are constructed using three-series
CMOS devices. This combination produces good fault
protection but fairly high on-resistance when the signals
are within about 3V of each supply rail. These series
devices are not capable of handling signals up to the
power-supply rails.

The MAX4533 differs considerably from traditional fault­protected switches, with three advantages. First, it is
constructed with two parallel FETs, allowing very low
on-resistance when the switch is on. Second, they allow
signals on the NC_ or NO_ pins that are within or slightly

beyond the supply rails to be passed through the switch
to the COM_ terminal, allowing rail-to-rail signal opera­tion. Third, when a signal on NC_ or NO_ exceeds the
supply rails by about 150mV (a fault condition), the volt­age on COM_ is limited to the appropriate polarity sup­ply voltage. Operation is identical for both fault
polarities. The fault-protection extends to ±25V with
power on and ±40V with power off.

The MAX4533 has a parallel N-channel and P-channel
MOSFET switch configuration with input voltage sensors.
The simplified internal structure is shown in Figure 1. The
parallel N1 and P1 MOSFETs form the switch element.
N3 and P3 are sensor elements to sample the input volt­age and compare it against the power-supply rails.

NAME FUNCTION

1, 10, 11, 20 IN1, IN2, IN3, IN4 Logic Control Digital Inputs

PIN

2, 9, 12, 19 NO1, NO2, NO3, NO4 Normally Open Inputs*
3, 8, 13, 18 COM1, COM2, COM3, COM4 Analog Switch Common Outputs*
4, 7, 14, 17 NC1, NC2, NC3, NC4 Normally Closed Inputs*

5 V- Negative Analog Supply Voltage Input

6 GND Digital Ground
15 N.C. No Connection. Not internally connected.
16 V+ Positive Analog and Digital Supply-Voltage Input

*

When the voltage on NO_ or NC_ does not exceed V+ or V-, NO_ (or NC_) and COM_ pins are bidirectional.

During normal operation of a conducting channel, N1
and P1 remain on with a typical 125Ω on-resistance
between NO_ (or NC_) and COM_. If the input voltage
exceeds either supply rail by about 150mV, the parallel
combination switches (N1, P1) are forced off through
the driver and sensing circuitries. At the same time, the
output (COM_ ) is clamped to the appropriate supply
rail by the clamp circuitries (N2, P2). Two clamp circuits
limit the output voltage to the supply voltages.

For simplicity, Figure 1 shows only one side of the SPDT
switch configuration. The complete circuit is composed
of two channels with their outputs connected.

Normal Operation

Two comparators continuously compare the voltage on
the NO_ (or NC_ ) pin with V+ and V- supply voltages.
When the signal on NO_ (or NC_ ) is between V+ and
V-, the switch behaves normally, with FETs N1 and P1
turning on and off in response to NO_ (or NC_) signals
(Figure 1). For any voltage between the supply rails,
the switch is bidirectional; therefore, COM_ and NC_
(or NO_ ) are interchangeable. Only NO_ and NC_ can
be exposed to overvoltages beyond the supply range
and within the specified breakdown limits of the device.

Fault Condition

The MAX4533 protects devices connected to its output
(COM_) through its unique fault-protection circuitry.
When the input voltage is raised above either supply
rail, the internal sense and comparator circuitries (N3
and N-channel driver or P3 and P-channel driver) dis­connect the output (COM_) from the input (Figure 1).

If the switch driven above the supply rail has an on
state, the clamp circuitries (N2 or P2) connect the out­put to the appropriate supply rail. Table 1 summarizes
the MAX4533’s operation under normal and fault condi­tions. Row 5 shows a negative fault condition when the
supplies are on. It shows that with supplies of ±15V, if
the input voltage is between -15V and -25V, the output
(COM_) clamps to the negative supply rail of -15V.
With this technique, the SPDT switch is capable of with­standing a worse-case condition of opposite fault polar­ities at its inputs.

Transient Fault Condition

When a fast rising or falling transient on NO_ (or NC_)
exceeds V+ or V-, the output (COM_) follows the input
(IN_) to the supply rail by only a few nanoseconds. This
delay is due to the switch on-resistance and circuit
capacitance to ground. However, when the input tran­sient returns to within the supply rails there is a longer
recovery time. For positive faults, the recovery time is
typically 2.5µs. For negative faults, the recovery time is
typically 1.3µs. These values depend on the COM_ out­put resistance and capacitance. The delays are not
dependent on the fault amplitude. Higher COM_ output
resistance and capacitance increase the recovery
times.

Fault Protection, Voltage, and Power Off

The maximum fault voltage on the NO_ or NC_ pins is
±40V from ground when the power is off. With ±15V sup­ply voltages, the highest voltage on NO_ (or NC_) can
be +25V, and the lowest voltage on NO_ (or NC_) can
be -25V. Exceeding these limits can damage the chip.

IN_ Logic-Level Thresholds

The logic-level thresholds are TTL/CMOS-compatible
when V+ is +15V. Raising V+ increases the threshold
slightly; when V+ reaches +25V, the level threshold is

2.8V—higher than the TTL output high-level minimum of

2.4V, but still compatible with CMOS outputs (see the

Typical Operating Characteristics

).

Increasing V- has no effect on the logic-level thresh­olds, but it does increase the gate-drive voltage to the
signal FETs, reducing their on-resistance.

MAX4533

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

SPDT Analog Switch

_______________________________________________________________________________________ 9

-15V

-15V

+15V

P-CHANNEL

DRIVER

N-CHANNEL

DRIVER

+15V

N3

P3

INPUT

NC_

or

NO_

N1

CLAMP

OUTPUT COM_

CLAMP

+V(+15V)

-V(-15V)

N2

P2

P1

COMPARATOR

COMPARATOR

SENSE

SWITCH

SENSE

SWITCH

Figure 1. Simplified Internal Structure

Failure Modes

The MAX4533 is not a lightning arrester or surge pro­tector. Exceeding the fault-protection voltage limits on
NO_ or NC_, even for very short periods, can cause the
device to fail.

Applications Information

Ground

There is no 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.

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 switches. This

drive signal is the only connection between the power
supplies and the analog signals. GND, IN_, and COM_
have ESD protection diodes to V+ and V-.

Supply Current Reduction

When the logic signals are driven rail-to-rail from 0 to
+12V or -15V to +15V, the supply current reduces to
approximately half of the supply current when the logic
input levels are at 0 to 5V.

Power Supplies

The MAX4533 operates with bipolar supplies between
±4.5V and ±18V. The V+ and V- supplies need not be
symmetrical, but their difference can not exceed the
absolute maximum rating of +44V. The MAX4533 oper­ates from a single supply between +9V and +36V when
V- is connected to GND.

MAX4533

Quad, Rail-to-Rail, Fault-Protected,
SPDT Analog Switch

10 ______________________________________________________________________________________

Table 1. Switch States in Normal and Fault Conditions

INPUT

RANGE

On Between Rails

POWER

SUPPLIES

(V+, V-)

NC_

On

NO_

Off

OUTPUT

NC_
On Between Rails Off On NO_
On Between V+ and (+40V - V+) On Off V+
On Between V+ and (+40V - V+) Off On V+
On Between V- and (-40V - V-) On Off V­On Between V- and (-40V - V-) Off On V-

Off Between Rails Off Off

Follows the load

terminal voltage.

Test Circuits/Timing Diagrams

tR < 20ns
t

F

< 20ns

50%

0V

+10V

LOGIC
INPUT

V-

-15V

2kΩ

COM_

GND

(REPEAT TEST FOR IN2, IN3, AND IN4.)

V

IN

+10V

IN_

NO_

50%

t

OPEN

50% 50%

50% 50%

3V

t

OPEN

t

ON

t

OFF

t

ON

t

OFF

0V

-10V

V

COM

+15V

V+

NC_

-10V

SWITCH OUTPUT

MAX4533

Figure 2. Switching-Time Test Circuit

MAX4533

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

SPDT Analog Switch

______________________________________________________________________________________ 11

Test Circuits/Timing Diagrams (continued)

50%

V

O1

V

O2

0.9V

O

+3V

0V

V

COM

0V

V

COM

LOGIC
INPUT

SWITCH
OUTPUT

SWITCH
OUTPUT

+15V

V+

NO

V-

-15V

CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
LOGIC 0 INPUT.

GND

LOGIC
INPUT

0V

0.9V

O

t

D

t

D

R

L2

NC

C

L2

V

O2

V

O1

C

L1

RL = 1000Ω
CL = 35pF

COM_

V

COM

R

L1

IN_

MAX4533

Figure 3. Break-Before-Make

0V

V+

V

IN_

∆ V

OUT

IS THE MEASURED VOLTAGE DUE TO CHARGE-

TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF.

∆ V

OUT

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

OUT

x C

L

V

OUT

V+

V

OUT

V

IN_

GND

V+

V-

V-

IN_

NC_ OR NO_

V

COM_

MAX4533

50Ω

C

L

100pF

Figure 4. Charge Injection

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

V+

V+

GND

V+

V-

V-

IN_

NO_

COM_

MAX4533

NC_

ADDRESS SELECT

1MHz

CAPACITANCE

ANALYZER

Figure 5. COM_, NO_, NC_ Capacitance

MAX4533

Quad, Rail-to-Rail, Fault-Protected,
SPDT Analog Switch

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.

12

____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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.

12

____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

Test Circuits/Timing Diagrams (continued)

MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT SOCKET TERMINALS.
OFF ISOLATION IS MEASURED BETWEEN COM_ AND “OFF” NO_ OR NC_ TERMINALS.
ON LOSS IS MEASURED BETWEEN COM_ AND “ON” NO_ OR NC_ TERMINALS.
CROSSTALK IS MEASURED BETWEEN COM_ TERMINALS WITH ALL SWITCHES ON.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.

V+

GND

MEAS. REF.

V+

V-

V-

IN_

COM_

MAX4533

NO_, NC_

ADDRESS SELECT

10nF

10nF

NETWORK
ANALYZER

50Ω

50Ω 50Ω

50Ω

OFF ISOLATION = 20 log

ON LOSS = 20 log

CROSSTALK = 20 log

V

OUT

V

IN

V

OUT

V

IN

V

OUT

V

IN

V

IN

V

OUT

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

PART

MAX4533CPP 0°C to +70°C

TEMP. RANGE PIN-PACKAGE

20 Plastic DIP
MAX4533EAP
MAX4533ESP
MAX4533EPP -40°C to +85°C

-40°C to +85°C

-40°C to +85°C 20 SSOP
20 Wide SO
20 Plastic DIP

MAX4533MJP -55°C to +125°C 20 CERDIP

Ordering Information (continued)

Chip Information

TRANSISTOR COUNT: 448