Rainbow Electronics MAX14753 User Manual

General Description

The MAX14752/MAX14753 are 8-to-1 and dual 4-to-1
high-voltage analog multiplexers. Both devices feature
60Ω (typ) on-resistance with 0.03Ω (typ) on-resistance
flatness. These low on-resistance multiplexers conduct
equally well in either direction. Flexible logic levels for
the channel-select interface are defined by the EN input.

The MAX14752 is a 8-to-1 multiplexer and MAX14753 is
a dual 4-to-1 multiplexer. Both devices operate with
dual supplies of ±10V to ±36V, or a single supply of
+20V to +72V.

The MAX14752/MAX14753 are available in a 16-pin
TSSOP package and are pin compatible with the indus­try-standard DG408/DG409. Both the MAX14752/
MAX14753 are specified over the extended -40°C to
+85°C operating temperature range.

Applications

Programmable-Logic Controllers

Environment Control Systems

ATE Systems

Medical Monitoring Systems

Automotive

Features

o Wide Dual Power-Supply Range ±36V (max)
o Wide Single Power-Supply Range +72V (max)
o Low On-Resistance 60Ω (typ)
o R

ON

Flatness Over Common-Mode Voltage 0.03Ω

(typ)

o Low-Input (20nA) On-Leakage Current (max)
o EN Voltage Defines Logic Level of S0, S1, and S2
o Low I

DD

(max) Supply Current in Disable Mode

25µA (max)

o Overvoltage/Undervoltage Clamp Through

Protection Diodes

o Break-Before-Make Operation
o Pin Compatible with Industry-Standard

DG408/DG409

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

________________________________________________________________

Maxim Integrated Products

1

19-4255; Rev 0; 8/08

Ordering Information

+

Denotes a lead-free/RoHS-compliant package.

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

Pin Configurations appear at end of data sheet.

Functional Diagrams

PART TEMP RANGE PIN-PACKAGE

MAX14752EUE+ -40°C to +85°C 16 TSSOP

MAX14753EUE+ -40°C to +85°C 16 TSSOP

MAX14752

V

SS

CONTROL

S1S0 S2

EN

IN0

IN1

IN2

IN3

IN4

IN5

IN6

IN7

V

DD

GND

OUT

INA0

INA1

INA2

INA3

INB0

INB1

INB2

INB3

V

DD

S1 S0

MAX14753

V

SS

OUTA

OUTB

CONTROL

GND

EN

MAX14752/MAX14753

8-Channel/Dual 4-Channel
72V Analog Multiplexers

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.

VDDto VSS.............................................................-0.3V to +72V

GND to V

SS

..............................................................-0.3V to V

DD

EN, S0, S1, S2 to GND .................................................................

..............................-0.3V to the lesser of (+12V and V

DD

+ 0.3V)

IN_, INA_, INB_, OUT, OUTA, OUTB to V

SS ......................................

...........

-2V to (V

DD

- V

SS

+ 2V) or 100mA (whichever occurs first)

Signal Slew Rate of IN_, INA_, INB_,

OUT, OUTA, OUTB ................................see SOA in Figure 11

Continuous Current into IN_, INA_,

INB_, OUT, OUTA, OUTB .............................................100mA

Continuous Power Dissipation (T

A

= +70°C)

16-Pin TSSOP (derate 11.1mW/°C above +70°C) ......890mW

Junction-to-Ambient Thermal Resistance (θ

JA

) (Note 1)

16-Pin TSSOP ..............................................................90°C/W

Junction-to-Case Thermal Resistance (θ

JC

) (Note 1)

16-Pin TSSOP ..............................................................27°C/W

Maximum Operating Temperature Range.........-40°C to +125°C

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

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

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

DC ELECTRICAL CHARACTERISTICS–DUAL SUPPLIES

(VDD= +35V, VSS= -35V, V

GND

= 0, VEN= +3.3V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

,

,

)

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer

board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial

.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

POWER SUPPLY

VDD Supply Voltage Range V

VSS Supply Voltage Range V

VDD Supply Current

VSS Supply Current

ANALOG MUX

Analog Signal Range

Current Through Multiplexer I

On-Resistance R

On-Resistance Matching
Between Channels

On-Resistance Flatness R

Output On-Leakage Current I

DD

SS

I

DD(OFF)

I

DD(ON)

I

SS(OFF)

I

SS(ON)

V

, V

IN

INA_,

V

, V

INB_

V

OUTA, VOUTB

IN, IINA

ON

ΔR

ON

FLAT_(ON

OUT(ON)

VEN = VS_ = 0, V

VEN = +5V, VS_ = 0 or VEN, V

= +20V

V

INB_

VEN = VS_ = 0, V

VEN = +5V, VS_ = 0 or VEN, V
V

= +20V

INB_

OUT,

I

V

INB

IN_

I

IN_, IINA_, IINB_

V

OUT

I

IN_, IINA_, IINB_

, V

, V

INA_

OUTA

, V

±20V, 0

I

IN_, IINA_, IINB_

V

, V

OUT

OUTA

MAX14752: V
V

, V

INA_

, V

IN_

MAX14753: V
V

, V

INA_

, V

IN_

IN_ = VINA_

IN_ = VINA_

= ±20V -5 +5 mA

INB_

= 5mA; V

, V

OUTB

= 5mA, V

= 5mA, V

, V

OUTB

, V

OUT

= unconnected, Figure 2

INB_

, V

OUT

= unconnected, Figure 2

INB_

= V

= V

IN_

= ±20V, Figure 1

IN_

IN_

= ±20V

, V

OUTA

, V

OUTA

= +20V 12 25 µA

INB_

IN_ = VINA_

INB_

IN_ = VINA_

, V

INA_

, V

INA_

, V

INA_

OUTB

OUTB

=

= +20V 11 25 µA

=

, V

,

INB_

, V

=

INB_

, V

,

INB_

= ±20V,

= ±20V,

+10 +36 V

-10 -36 V

270 600 mA

260 600 mA

V

SS

V

DD

60 130 Ω

0.5 Ω

0.03 Ω

-20 +20

-10 +10

V

nA

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS–DUAL SUPPLIES (continued)

(VDD= +35V, VSS= -35V, V

GND

= 0, VEN= +3.3V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Output Off-Leakage Current I

Input Off-Leakage Current I

LOGIC (EN, S0, S1, S2)

EN Input Voltage Low V

EN Input Voltage High V

EN, S_ Input Voltage Range VEN, VS_ 11 V

EN Input Current I

S0, S1, S2 Input Voltage Low V

S0, S1, S2 Input Voltage High V

Input Capacitance C

DYNAMIC CHARACTERISTICS

Enable Turn-On Time t

Enable Turn-Off Time t

Transition Time t

Break-Before-Make Time Delay t

Frequency Response BW RS = 50Ω, RL = 1kΩ, Figure 7 20 MHz

Off-Isolation V

Crosstalk V

Total Harmonic Distortion Plus
Noise

Charge Injection Q

OUT(OFF)

IN(OFF)

EN_IL

EN_IH

EN_IH(DC)

IL

IH

IN

ON

OFF

TRANS

BBM

ISO

CT

THD+N R

MAX14752: V
V

, V

IN_

INA_

MAX14753: V
V

, V

IN_

INA_

V

, V

OUT

V

V

OUTA

= ±20V, Figure 3

INB_

= + 11V , V

E N

or ( 0.75 x V

V

, V

IN0

INA0

V

, V

IN0

INA0

V

, V

IN0

INA0

V

, V

I N _

I N A _

Fi g ur e 6

V

, V

IN_

INA_

= 50Ω, CL = 15pF, Figure 8

R

L

RS = RL = 50Ω, Figure 9 62 dB

= RL = 1kΩ, f = 20Hz to 20kHz 0.0014 %

S

V

, V

IN_

INA_

Figure 10

, V

, V

, V

OUTB

OUTB

= ±20V,

= ±40V,

, V

IN_

INA_

-20 +20

-10 +10

,

-5 +5 nA

OUT

, V

= -20V, Figure 3

INB_

, V

OUT

, V

= -40V, Figure 3

INB_

, V

OUTB

OUTA

OUTA

= ±20V, V

0.8 V

2.1 V

= V

= V

E N

S 0

S 1

= ( 0.25 x V

S 2

)

E N

)

0.4 mA

0.25 x
V

EN

0.75 x
V

EN

23 pF

= ±10V, RL =10kΩ, Figure 4 1 25 µs

= ±10V, RL = 10kΩ , Fi g ur e 4 0.8 2 µs

= ±10V, RL = 10kΩ , Fi g ur e 5 10 µs

, V

= ± 10V , RL = 10kΩ ,

I N B _

, V

= 1V

INB_

, V

= GND, CL = 1nF,

INB_

, f = 100kHz,

RMS

10 µs

65 dB

200 pC

nA

V

V

MAX14752/MAX14753

8-Channel/Dual 4-Channel
72V Analog Multiplexers

4 _______________________________________________________________________________________

DC ELECTRICAL CHARACTERISTICS–SINGLE SUPPLY

(VDD= +70V, VSS= V

GND

= 0, VEN= +3.3V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)

)

Note 2: All parameters in single supply operation are expected to be the same as in dual supplies operation.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

ANALOG MUX

On-Resistance R

O U T, OU TA, O U TB O ff- Leakag e
C ur r ent

I

ON

I

OUT(OFF),

I

OUTA(OFF),

I

OUTB(OFF

= 5m A, V

IN _

V

, V

IN A_

Fi gur e 1

M AX 14752: V

= +10V, Figure 3

V

INB_

M AX 14753: V

= +10V, Figure 3

V

INB_

OU TA

IN _

, V

OUT

OUT

, V

IN B_

= + 20V ( M AX 14752) ,

OU T

, V

= + 20V ( M AX 14753) ,

OU TB

= +40V, V

= +40V, V

IN_

IN_

= V

= V

INA_

INA_

=

=

60 130 Ω

-20 +20

nA

-10 +10

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

_______________________________________________________________________________________ 5

Test Circuits/Timing Diagrams/Truth Tables

Figure 1. On-Resistance

Figure 2. On-Leakage Current

Figure 3. Off-Leakage Current

V

V

DD

1μF

V

DD

MAX14752

GND

MAX14753

1μF

OUT
OUTA
OUTB

I

IN

V

SS

V

SS

UNCONNECTED

IN_
INA_
INB_

V

IN

IN_
INA_
INB_

GND

V

DD

V

DD

MAX14752
MAX14753

1μF

1μF

I

OUT(ON)

I

OUTA_(ON)

OUT

I

OUTB_(ON)

OUTA
OUTB

A

V

OUT

V

SS

V

SS

I

IN_(OFF)

I

INA_(OFF)

I

INB_(OFF)

V

IN

IN_
INA_
INB_

GND

V

DD

V

DD

MAX14752
MAX14753

1μF

1μF

I

OUT(OFF)

I

OUTA_(OFF)

OUT

I

OUTB_(OFF)

OUTA
OUTB

AA

V

OUT

V

SS

V

SS

MAX14752/MAX14753

8-Channel/Dual 4-Channel
72V Analog Multiplexers

6 _______________________________________________________________________________________

Test Circuits/Timing Diagrams/Truth Tables (continued)

Figure 4. Enable Switching Time

+35V

V

GND

GND

DD

MAX14752

+35V

V

DD

MAX14753

EN

S0

S1

S2

EN

S0

S1

V

-35V

V

SS

SS

IN0

IN1–IN7

OUT

INA0

INA1–INA3
INB0–INB3

OUTA

+10V

10kΩ50Ω

+10V

10kΩ50Ω

V

V

OUT

OUTA

+3.3V

EN

V

OUT

SWITCH
OUTPUT

t

< 20ns

R

< 20ns

t

F

50%

0V

t

ON

, V

OUTA

0V

90%

10%

t

OFF

-35V

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

_______________________________________________________________________________________ 7

Test Circuits/Timing Diagrams/Truth Tables (continued)

Figure 5. Transition Time

Figure 6. Break-Before-Make Interval

+35V

V

GND

GND

DD

MAX14752

+35V

V

DD

MAX14753

S2

S1

50Ω

+3.3V

50Ω

+3.3V V

S0

EN

S1

S0

EN

V

SS

-35V

INA1–INA2
INB0–INB3

V

SS

-35V

IN0

IN1–IN6

IN7

OUT

INA0

INA3

OUTA

+10V

+10V

10kΩ

+10V

+10V

10kΩ

V

OUT

OUTA

V

OUT

+3.3V

S_

, V

OUTA

SWITCH
OUTPUT

tR < 20ns

< 20ns

t

F

50%

0V

90%

0V

t

TRANS

EN+3.3V

S0

S1

S2

50Ω

GND

+35V

V

DD

MAX14752

V

-35V

SS

IN0–IN7

OUT

+10V

10kΩ

< 20ns

t

R

< 20ns

t

80%

t

F

BBM

+3.3V

S_

0V

V

OUT

V

OUT

SWITCH
OUTPUT

0V

50%

MAX14752/MAX14753

8-Channel/Dual 4-Channel
72V Analog Multiplexers

8 _______________________________________________________________________________________

Test Circuits/Timing Diagrams/Truth Tables (continued)

Figure 7. Frequency Response

Figure 8. Off-Isolation

Figure 9. Crosstalk

+35V

1μF

V

DD

+3.3V

EN

MAX14752

IN0

V

IN

NETWORK
ANALYZER

S0

S1

S3

GND

1μF

V

-35V

OUT

SS

+35V

1μF

V

IN

R

= 50Ω

S

IN0

IN7

S0

S1

S2

.
.
.

GND

V

DD

MAX14752

EN

OUT

R

= 1kΩ

L

V

SS

CL = 15pF

ON-LOSS = 20log

V

OUT

V

OUT

MEAS REF

V

OUT

V

IN

R

= 50Ω

S

1μF

+35V

V

IN

IN0

IN1

IN7

S0

S1

S2

.
.
.

MAX14752

GND

V

DD

EN

OUT

V

SS

R

+3.3V

V

= 1kΩ

L

OUT

1μF

OFF ISOLATION = 20log

-35V

V

10nF

OUT

V

IN

CROSSTALK = 20log

-35V

V

OUT

V

IN

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

_______________________________________________________________________________________ 9

Test Circuits/Timing Diagrams/Truth Tables (continued)

Figure 10. Charge Injection

Table 1. MAX14752 Truth Table

Table 2. MAX14753 Truth Table

+35V

MAX14752

GND

V

DD

OUT

CL = 1nF

V

SS

-35V

IN_

EN

CHANNEL

SELECT

S0

S1

S2

S2 S1 S0 EN OUT

X X X 0 All off

0001IN0

0011IN1

0101IN2

0111IN3

1001IN4

1011IN5

1101IN6

1111IN7

+3.3V

V

EN

0V

V

OUT

V

OUT

0V

ΔV

IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER

OUT

ERROR Q WHEN THE CHANNEL TURNS OFF.

Q = CL x ΔV

OUT

S1 S0 EN OUTA OUTB

X X 0 All off All off

0 0 1 INA0 INB0

0 1 1 INA1 INB1

1 0 1 INA2 INB2

1 1 1 INA3 INB3

OFFON ON

ΔV

OUT

MAX14752/MAX14753

8-Channel/Dual 4-Channel
72V Analog Multiplexers

10 ______________________________________________________________________________________

Typical Operating Characteristics

(TA= +25°C, unless otherwise noted.)

50

52

56

54

58

60

ON-RESISTANCE

vs. V

OUT

(DUAL SUPPLIES)

MAX14752/3 toc01

R

ON

(Ω)

V

OUT

(V)

-35 5 5 15 25-15-25 35

±35V

±10V

±30V

±20V

20

40

80

60

120

100

140

ON-RESISTANCE vs. V

OUT

AND TEMPERATURE

(DUAL SUPPLIES)

MAX14752/3 toc02

R

ON

(Ω)

V

OUT

(V)

-35 5 5 15 25-15-25 35

VDD = +35V
V

SS

= -35V

TA = +25°C

TA = +85°C

TA = +125°C

TA = -40°C

50

52

56

54

58

60

02010 30 40 50 60 70

ON-RESISTANCE vs. V

OUT

(SINGLE SUPPLIES)

MAX14752/3 toc03

V

OUT

(V)

R

ON

(Ω)

+40V+20V

+70V

0

40

80

60

120

100

140

ON-RESISTANCE vs. V

OUT

AND TEMPERATURE

(SINGLE SUPPLIES)

MAX14752/3 toc04

R

ON

(Ω)

V

OUT

(V)

-35 50510152025
30-10

-15

-20

-25

-30

35

VDD = +70V
V

SS

= 0V

TA = +25°C

TA = +85°C

TA = +125°C

TA = -40°C

0.01

0.1

1

10

100

-40 -10 5-25 203550658095110125

ON LEAKAGE vs. TEMPERATURE

MAX14752/3 toc05

TEMPERATURE (°C)

LEAKAGE CURRENT (nA)

VDD = +35V
V

SS

= -35V

I

OUT(ON)

0.01

0.1

1

10

100

-40 -10 5-25 203550658095110125

OFF LEAKAGE vs. TEMPERATURE

MAX14752/3 toc06

TEMPERATURE (°C)

LEAKAGE CURRENT (nA)

VDD = +35V
V

SS

= -35V

I

OUT(OFF)

I

IN(OFF)

0

100

200

300

400

500

-40 -10 5-25 203550658095110125

CHARGE INJECTION vs. TEMPERATURE

MAX14752/3 toc07

TEMPERATURE (°C)

Q (pC)

VDD = +35V
V

SS

= -35V

250

270

260

300

290

280

310

320

340

330

350

SUPPLY CURRENT vs. TEMPERATURE

MAX14752/3 toc08

I

CC

, I

EE

(μA)

-40 -10 5-25 203550658095110125
TEMPERATURE (°C)

VDD = +35V
V

SS

= -35V

V

EN

= +3.3V

I

CC

I

EE

0

10

30

20

40

50

021345

EN INPUT CURRENT vs. V

S_

MAX14752/3 toc09

VS_ (V)

I

EN

(μA)

VDD = +35V
V

SS

= -35V

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

______________________________________________________________________________________

11

Typical Operating Characteristics (continued)

(TA= +25°C, unless otherwise noted.)

0.01 1 100.1 100

CROSSTALK vs. FREQUENCY

MAX14752/3 toc10

FREQUENCY (MHz)

CROSSTALK (dB)

0

-100

-80

-60

-40

-20

VDD = +35V
V

SS

= -35V

0.01 1 100.1 100

OFF-ISOLATION vs. FREQUENCY

MAX14752/3 toc11

FREQUENCY (MHz)

OFF-ISOLATION (dB)

0

-100

-80

-60

-40

-20

VDD = +35V
V

SS

= -35V

0.01 1 100.1 100

ON-LOSS vs. FREQUENCY

MAX14752/3 toc12

FREQUENCY (MHz)

ON-LOSS (dB)

0

-50

-40

-30

-20

-10

VDD = +35V
V

SS

= -35V

0.01 1 100.1 100

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

MAX14752/3 toc13

FREQUENCY (MHz)

THD+N (%)

0.005

0

0.001

0.002

0.003

0.004

VDD = +35V
V

SS

= -35V

MAX14752/MAX14753

8-Channel/Dual 4-Channel
72V Analog Multiplexers

12 ______________________________________________________________________________________

MAX14752 Pin Description (Single 8-to-1 Mux)

MAX14753 Pin Description (Dual 4-to-1 Mux)

PIN NAME FUNCTION

1 S0 Mux Input Select

2EN

3VSSNegative Supply Voltage. Bypass VSS to GND with a 1µF ceramic capacitor.

4 IN0 Bidirectional Analog Input

5 IN1 Bidirectional Analog Input

6 IN2 Bidirectional Analog Input

7 IN3 Bidirectional Analog Input

8 OUT Bidirectional Analog Output

9 IN7 Bidirectional Analog Input

10 IN6 Bidirectional Analog Input

11 IN5 Bidirectional Analog Input

12 IN4 Bidirectional Analog Input

13 V

14 GND

15 S2 Mux Input Select

16 S1 Mux Input Select

Mux Enable. Drive EN high to enable the device. The EN high voltage defines input logic voltage level for
S0, S1, and S2.

Positive Supply Voltage. Bypass VDD to GND with a 1µF ceramic capacitor.

DD

Ground. Connect GND to V
supply.

for single supply. Bypass GND to VSS with a 1µF ceramic capacitor for dual

SS

PIN NAME FUNCTION

1 S0 Mux Input Select

2EN

3VSSNegative Supply Voltage. Bypass VSS to GND with a 1µF ceramic capacitor.

4 INA0 Bidirectional Analog Input

5 INA1 Bidirectional Analog Input

6 INA2 Bidirectional Analog Input

7 INA3 Bidirectional Analog Input

8 OUTA Bidirectional Analog Output

9 OUTB Bidirectional Analog Output

10 INB3 Bidirectional Analog Input

11 INB2 Bidirectional Analog Input

12 INB1 Bidirectional Analog Input

13 INB0 Bidirectional Analog Input

14 V

15 GND

16 S1 Mux Input Select

Mux Enable. Drive EN high to enable the device. The EN high voltage defines input logic voltage level for
S0 and S1.

Positive Supply Voltage. Bypass VDD to GND with a 1µF ceramic capacitor.

DD

Ground. Connect GND to V
supply.

for single supply. Bypass GND to VSS with a 1µF ceramic capacitor for dual

SS

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

______________________________________________________________________________________ 13

Detailed Description

The MAX14752/MAX14753 are 8-to-1 and dual 4-to-1
high-voltage analog multiplexers. Both devices feature
60Ω (typ) on-resistance with 0.03Ω (typ) on-resistance
flatness. These low on-resistance multiplexers conduct
equally well in either direction.

The MAX14752 is an 8-to-1 multiplexer and MAX14753
is a dual 4-to-1 multiplexer. Both devices operate with
dual supplies of ±10V to ±36V or a single supply of
+20V to +72V. Both devices can also operate with
unbalanced supplies, such as +36V and -10V. These
multiplexers support rail-to-rail input and output signals.
The control logic level is defined via the EN input.
These devices do not require power-supply sequenc­ing. For input voltage steps larger than 15V, the input­signal slew rate needs to be limited as described in the

Applications Information

section, otherwise the device

can be damaged.

Applications Information

Current Through the Mux

The current flowing through each on-channel of the
MAX14752/MAX14753 multiplexers must be limited to
±5mA for normal operation. If the current exceeds this
limit, an internal leakage current from that channel to
VSSappears. Larger input current does not destroy the
device if the max power dissipation is not exceeded.

Signal’s Slew-Rate Limit

If the input signal to the MAX14752/MAX14753 is a volt­age step larger than 15V, limit the slew rate of the sig­nal according to the safe operating area specified in
Figure 11. For input-voltage steps lower than 15V (posi­tive or negative), slew-rate limiting is not required. Slew­rate limiting can be achieved through a passive RC
lowpass filter (see Figure 12). Do not use the input volt­age steps beyond the safe operating area specified in
the Figure 11 to avoid permanent damage to the device.

Figure 11. Safe Operating Area

Figure 12. Input Slew-Rate Limit

300
280
260
240
220
200
180
160
140

INPUT SLEW RATE (V/μs)

120
100

80
60

INPUT SLEW-RATE SOA

SAFE
OPERATING
AREA (SOA)

070455152520 30 3510

INPUT VOLTAGE STEP (V)

IN0
IN1
IN2

500Ω

1nF

IN3

IN4

IN5
IN6
IN7

S0 S2 GNDS1 EN

CONTROL

40 50 6055 65

V

DD

MAX14752

V

SS

1μF

OUT

1μF

MAX14752/MAX14753

8-Channel/Dual 4-Channel
72V Analog Multiplexers

14 ______________________________________________________________________________________

Input Voltage Clamping

For applications that require input voltages beyond the
normal operating voltages, the internal input diodes to
V

DD

and VSScan be used to limit the input voltages. As
shown in Figure 13, series resistors can be employed
at the inputs to limit the currents flowing into the diodes
during undervoltage and overvoltage conditions.
Choose the limiting resistors such that the input cur­rents are limited to I

IN_

(max) = 100mA. The values of
the current limit resistors can be calculated as the larg­er of R

LIM+

and R

LIM-.

During an undervoltage or overvoltage condition, the
input impedance is equal to R

LIM

. The additional power
dissipation due to the fault currents needs to be calcu­lated. The MAX14752/MAX14753 multiplexer operates

normally on a channel that is on during an overvoltage
or undervoltage clamping condition on a second chan­nel that is not switched.

Beyond-the-Rail Input

If input voltages are expected to go beyond the supply
voltages, but within the absolute maximum supply volt­ages of the MAX14752/MAX14753, add two diodes in
series with the supplies as shown in Figure 14.

During undervoltage and overvoltage events, the internal
diodes pull V

DD/VSS

supplies up/down. An advantage of
this scheme is that the input impedance is high and
currents do not flow though the MAX14752/MAX14753
during overvoltage and undervoltage events. The input
voltages must be limited to the voltages specified in the

Absolute Maximum Ratings

section.

Chip Information

PROCESS: CMOS

R

V (max – V

I (max

R

V – V (min

I (max

LIM

IN DD

IN_

LIM

-

SS IN

IN_

+=

=

)

)

)

)

Figure 13. Input Overvoltage and Undervoltage Clamping

V

DD

R

LIM

R

LIM

R

LIM

R

LIM

R

LIM

R

LIM

R

LIM

R

LIM

MAX14752

OUT

CONTROL

V

SS

S0 S2 GNDS1 EN

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

______________________________________________________________________________________ 15

Figure 14. Beyond-the-Rail Application

1

2

3

4

5

16

15

14

13

12

S1

S2

GND

V

DD

IN0

V

SS

EN

SO

MAX14752

TSSOP

+

TOP VIEW

IN4IN1

6

7

8

11

10

9

IN5

IN6IN3

IN2

IN7 9 OUTBOUT

1

2

3

4

5

16

15

14

13

12

S1

GND

V

DD

INB0INA0

V

SS

EN

SO

INB1INA1

6

7

8

1110INB2

INB3INA3

INA2

OUTA

MAX14753

TSSOP

+

Pin Configurations

V+

V

DD

R

IN_

V

IN

V

SS

V-

OUT

MAX14752/MAX14753

8-Channel/Dual 4-Channel
72V Analog Multiplexers

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.

16

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© 2008 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

SPRINGER

PACKAGE TYPE PACKAGE CODE DOCUMENT NO.

16 TSSOP U16-1

21-0066

Package Information

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