MAXIM MAX4851, MAX4851H, MAX4853, MAX4853H Technical data

General Description

The MAX4851/MAX4851H/MAX4853/MAX4853H family
of quad single-pole/single-throw (SPST) switches oper­ates from a single +2V to +5.5V supply and can handle
signals greater than the supply rail. These switches fea­ture low 3.5Ω on-resistance with 40pF on-capacitance
or 7Ω on-resistance with 30pF on-capacitance, making
them ideal for switching audio and data signals.

The MAX4851/MAX4851H are configured with four
SPST switches and feature a comparator for head­phone detection or mute/send key functions. The
MAX4853/MAX4853H have four SPST switches but do
not include a comparator.

For over-rail applications, these devices offer either the
pass-through or high-impedance option. For the
MAX4851/ MAX4853, signals greater than the positive
supply (up to 5.5V) pass through the switch without dis­tortion. For the MAX4851H/MAX4853H, the switch input
becomes high impedance when the input signal
exceeds the supply rail.

The MAX4851/MAX4851H/MAX4853/MAX4853H are
available in the space-saving, 16-pin, 3mm x 3mm thin
QFN package and operate over the -40°C to +85°C
extended temperature range.

Applications

USB Switching

Audio Signal Routing

Cellular Phones

Notebook Computers

PDAs and Other Handheld Devices

Features

♦ USB 2.0 Full Speed (12Mbps) and USB 1.1 Signal

Switching

♦ Switch Signals Greater than V

CC

♦ +2V to +5.5V Supply Range

♦ 3.5Ω/7Ω On-Resistance

♦ 30pF On-Capacitance (7Ω Switch)

♦ 150MHz -3dB Bandwidth

♦ 1.8V Logic Compatibility

♦ Low Supply Current

0.01µA (MAX4853)
5µA (MAX4851)
10µA (MAX4851H/MAX4853H)

♦ Low 0.01nA Leakage Current

♦ Available in a Space-Saving 3mm x 3mm, 16-Pin

TQFN Package

MAX4851/MAX4851H/MAX4853/MAX4853H

3.5ΩΩ/7

ΩΩ

Quad SPST Switches with Over-Rail

Signal Handling

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

MAX4851

MAX4851H

NO1

COM1
IN1

3.5Ω

NO2

COM2
IN2

3.5Ω

NO3

COM3
IN3

3.5Ω

NO4

COUT

COM4
IN4

CIN

3.5Ω

V

CC

3

MAX4853

MAX4853H

NO1

COM1
IN1

3.5Ω

NO2

COM2
IN2

7Ω

NO3

COM3
IN3

3.5Ω

NO4

COM4
IN4

7Ω

TRUTH TABLE

SWITCHES SHOWN
FOR LOGIC "0" INPUT

IN_

0
1

NO_
OFF

ON

Block Diagram/Truth Table

19-3471; Rev 0; 10/04

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.

PART

TEMP RANGE

PIN-PACKAGE

TOP

MARK

MAX4851ETE

16 TQFN-EP* ABW

MAX4851HETE

16 TQFN-EP* ABX

MAX4853ETE

16 TQFN-EP* ACB

MAX4853HETE

16 TQFN-EP* ACC

*EP = Exposed paddle.

Pin Configurations and Typical Operating Circuit appear at
end of data sheet

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

MAX4851/MAX4851H/MAX4853/MAX4853H

3.5ΩΩ/7

ΩΩ

Quad SPST Switches with Over-Rail

Signal Handling

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.

VCC, IN_, CIN, COM_, NO_ to GND (Note 1)........-0.3V to +6.0V

COUT..........................................................-0.3V to (V

CC

+ 0.3V)

COUT Continuous Current................................................±20mA

Closed-Switch Continuous Current COM_, NO_, NC_

3.5Ω Switch ................................................................±100mA

7Ω Switch .....................................................................±50mA

Peak Current COM_, NO_ (pulsed at 1ms, 50% duty cycle)

3.5Ω Switch ................................................................±200mA

7Ω Switch ...................................................................±100mA

Peak Current COM_, NO_ (pulsed at 1ms, 10% duty cycle)

3.5Ω Switch ................................................................±240mA

7Ω Switch ...................................................................±120mA

Continuous Power Dissipation (T

A

= +70°C)

16-Pin Thin QFN (derate 20.8mW/°C above +70°C) ...1667mW

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

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

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

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

ELECTRICAL CHARACTERISTICS

(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.0V, TA= +25°C, unless other­wise noted.) (Note 2)

PARAMETER

CONDITIONS

UNITS

Supply Voltage V

CC

2.0 5.5 V

MAX4851 5 10

10 20Supply Current I

CC

VCC = 5.5V, V

IN_

= 0 or V

CC

MAX4853

1

µA

ANALOG SWITCH (3.5Ω Switch)

Analog Signal Range

V

NO_

,

V

COM_

0 5.5 V

TA = +25°C 3.5 4.5

On-Resistance R

ON

VCC = 3V, I

COM_

=

10mA, V

NO_

= 0 to

5.5V (MAX485_) or
V

CC

(MAX485_H)

T

A

= -40°C to +85°C 5

Ω

TA = +25°C 0.1 0.2

On-Resistance Match Between
Channels (Notes 3, 4)

∆R

ON

VCC = 3V; I

COM

=

TA = -40°C to +85°C

Ω

TA = +25°C 1.2 1.8

R

FLAT

VCC = 3V, I

COM_

=

10mA, V

NO_

= 1V,

2V, 3V

T

A

= -40°C to +85°C 2

Ω

TA = +25°C -2 +2

NO_ Off-Leakage Current I

OFF

VCC = 5.5V, V

NO_

= 1V or 4.5V,

TA = -40°C to +85°C -10

nA

TA = +25°C -2 +2

COM_ On-Leakage Current I

ON

VCC = 5.5V; V

NO_

= 1V, 4.5V, or
floating; V

COM_

=

TA = -40°C to +85°C

nA

-3dB Bandwidth BW S i g nal = 0d Bm , RL = 50Ω, C L = 5p F, Fi g ur e 4

MHz

Note 1: Signals on IN_, NO_, or COM_ below GND are clamped by internal diodes. Limit forward-diode current to maximum current

rating.

SYMBOL

MIN TYP MAX

MAX4851H/MAX4853H

On-Resistance Flatness (Note 5)

10mA; V

V

COM_

1V, 4.5V, or floating

= 1.5V

NO_

= 4.5V or 1V

-12.5 +12.5

0.01

0.25

+10

135

MAX4851/MAX4851H/MAX4853/MAX4853H

3.5ΩΩ/7

ΩΩ

Quad SPST Switches with Over-Rail

Signal Handling

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.0V, TA= +25°C, unless other­wise noted.) (Note 2)

PARAMETER

CONDITIONS

UNITS

NO_ Off-Capacitance C

OFF

f = 1MHz, Figure 5 20 pF

COM On-Capacitance C

ON

f = 1MHz, Figure 5 40 pF

ANALOG SWITCH (7Ω Switch)

Analog Signal Range

V

NO_

,

V

COM_

0 5.5 V

TA = +25°C 7 9

On-Resistance R

ON

VCC = 3V, I

COM_

=

10mA, V

NO_

= 0 to

5.5V (MAX485_), or
V

CC

(MAX485_H)

T

A

= -40°C to +85°C 10

Ω

TA = +25°C 0.2 0.4

On-Resistance Match Between
Channels (Notes 3, 4)

∆R

ON

VCC = 3V, I

COM

=

TA = -40°C to +85°C 0.5

Ω

TA = +25°C 2.5

R

FLAT

VCC = 3V; I

COM_

=

10mA; V

NO_

= 1V,

2V, 3V

T

A

= -40°C to +85°C 4.0

Ω

TA = +25°C - 2 +2

NO_ Off-Leakage Current I

OFF

VCC = 5.5V, V

NO_

= 1V or 4.5V,

TA = -40°C to +85°C -10

nA

TA = +25°C - 2 +2

COM_ On-Leakage Current I

ON

VCC = 5.5V; V

NO_

= 1V, 4.5V, or
floating; V

COM_

=

TA = -40°C to +85°C

nA

-3dB Bandwidth BW

MHz

NO_ Off-Capacitance C

OFF

f = 1MHz, Figure 5 13 pF

COM On-Capacitance C

ON

f = 1MHz, Figure 5 30 pF

DYNAMIC CHARACTERISTICS

Signal Over-Rail to High­Impedance Switching Time

t

HIZ

MAX4851H/MAX4853H, VNO_ = VCC to
(V

CC

+ 0.5V), VCC < 5V, Figure 1

0.5 1 µs

High-Impedance to
Low-Impedance Switching Time

t

HIZB

MAX4851H/MAX4853H, VNO_ = (VCC +

0.5V) to V

CC

, VCC < 5V, Figure 1

0.5 1 µs

Skew (Note 3) t

SKEW

RS = 39Ω, CL = 50pF, Figure 2 0.1 1 ns

Propagation Delay (Note 3) t

PD

RS = 39Ω, CL = 50pF, Figure 2 0.9 2 ns

TA = +25°C 40 60

Turn-On Time t

ON

V

C C

= 3V , V

N O_

=

1.5V , R

L

= 300Ω, C

L

= 50p F, Fi g ur e 1

T

A

= -40°C to +85°C 100

ns

TA = +25°C 30 40

Turn-Off Time t

OFF

V

C C

= 3V , V

N O_

=

1.5V , R

L

= 300Ω, C

L

= 50p F, Fi g ur e 1

T

A

= -40°C to +85°C 60

ns

Charge Injection Q

8pC

On-Resistance Flatness (Note 5)

SYMBOL

10mA, V

V

COM_

1V, 4.5V, or floating

S i g nal = 0d Bm , RL = 50Ω, C L = 5p F, Fi g ur e 4 150

= 1.5V

NO_

= 4.5V or 1V

MIN TYP MAX

- 12.5 +12.5

3.75

+10

V

COM_

= 1.5V, RS = 0Ω, CL = 1nF, Figure 3

MAX4851/MAX4851H/MAX4853/MAX4853H

3.5ΩΩ/7

ΩΩ

Quad SPST Switches with Over-Rail

Signal Handling

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.0V, TA= +25°C, unless other­wise noted.) (Note 2)

PARAMETER

CONDITIONS

UNITS

Off-Isolation (Note 6)

f = 100kHz, V

COM_

= 1V

RMS

, RL = 50Ω,

C

L

= 5pF, Figure 4

-80 dB

Crosstalk

f = 1MHz, V

COM_

= 1V

RMS

, RL = 50Ω,

C

L

= 5pF, Figure 4

-95 dB

Total Harmonic Distortion THD

f = 20Hz to 20kHz, V

COM_

= 1V + 2V

P-P

,

R

L

= 600Ω

%

DIGITAL I/O (IN_)

VCC = 2V to 3.6V 1.4

Input Logic High Voltage V

IH

VCC = 3.6V to 5.5V 1.8

V

VCC = 2V to 3.6V 0.5

Input Logic Low Voltage V

IL

VCC = 3.6V to 5.5V 0.8

V

Input Leakage Current I

IN

V

IN_

= 0 or 5.5V

µA

COMPARATOR

Comparator Range 0 5.5 V

Comparator Threshold V

TH

VCC = 2V to 5.5V, falling input

0.3 x

0.33 x

0.36 x
V

Comparator Hysteresis VCC = 2V to 5.5V 50 mV

I

SOURCE

= 1mA

V

CC

­V

I

SINK

= 1mA 0.4 V

Rising input, Figure 6 2.5

Comparator Switching Time

Falling input, Figure 6 0.5

µs

Note 2: Specifications are 100% tested at TA= +85°C only, and guaranteed by design and characterization over the specified tem-

perature range.

Note 3: Guaranteed by design and characterization; 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 as measured over the

specified analog signal ranges.

Note 6: Off-isolation = 20log

10(VCOM_

/ V

NO_

), V

COM_

= output, V

NO_

= input to off switch.

SYMBOL

MIN TYP MAX

0.04

-0.5 +0.5

V

Comparator Output High Voltage

Comparator Output Low Voltage

0.4V

CC

V

CC

V

CC

MAX4851/MAX4851H/MAX4853/MAX4853H

3.5ΩΩ/7

ΩΩ

Quad SPST Switches with Over-Rail

Signal Handling

_______________________________________________________________________________________ 5

MAX4851/MAX4853

ON-RESISTANCE vs. COM VOLTAGE

MAX4851/3 toc01

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

42

1

2

3

4

5

6

7

8

9

10

0

06

3.5Ω SWITCH

VCC = 1.8V

VCC = 2.0V

VCC = 2.3V

VCC = 2.5V

VCC = 3.0V

VCC = 5.0V

MAX4851/MAX4853

ON-RESISTANCE vs. COM VOLTAGE

MAX4851/3 toc02

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

42

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

0.5
06

VCC = 3.0V

3.5Ω SWITCH

TA = +85°C

TA = +25°C

TA = -40°C

MAX4851/MAX4853

ON-RESISTANCE vs. COM VOLTAGE

MAX4851/3 toc03

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

42

1.0

1.5

2.0

2.5

3.0

3.5

0.5
06

VCC = 5.0V

3.5Ω SWITCH

TA = +85°C

TA = +25°C

TA = -40°C

MAX4851H/MAX4853H

ON-RESISTANCE vs. COM VOLTAGE

MAX4851/3 toc04

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

42

1

2

3

4

5

6

7

8

9

10

0

06

VCC = 1.8V

3.5Ω SWITCH

VCC = 2.0V

VCC = 2.3V

VCC = 2.5V

VCC = 3.0V

VCC = 5.0V

MAX4851H/MAX4853H

ON-RESISTANCE vs. COM VOLTAGE

MAX4851/3 toc05

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

2.52.00.5 1.0 1.5

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

1.0
0 3.0

VCC = 3.0V

3.5Ω SWITCH

TA = +85°C

TA = +25°C

TA = -40°C

MAX4851H/MAX4853H

ON-RESISTANCE vs. COM VOLTAGE

MAX4850 toc06

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

4321

1.0

1.5

2.0

2.5

3.0

3.5

0.5
05

VCC = 5.0V

3.5Ω SWITCH

TA = +85°C

TA = +25°C

TA = -40°C

MAX4853

ON-RESISTANCE vs. COM VOLTAGE

MAX4851/3 toc07

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

42

5

10

15

20

25

30

35

40

45

0

06

VCC = 1.8V

7Ω SWITCH

VCC = 2.0V

VCC = 2.3V

VCC = 2.5V

VCC = 3.0V

VCC = 5.0V

MAX4853

ON-RESISTANCE vs. COM VOLTAGE

MAX4851/3 toc08

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

42

3

4

5

6

7

8

2

06

VCC = 3.0V
7Ω SWITCH

TA = +85°C

TA = +25°C

TA = -40°C

MAX4853

ON-RESISTANCE vs. COM VOLTAGE

MAX4851/3 toc09

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

541 2 3

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

1.5
06

VCC = 5.0V
7Ω SWITCH

TA = +85°C

TA = +25°C

TA = -40°C

Typical Operating Characteristics

(VCC= 3.0V, TA= +25°C, unless otherwise noted.)