MAXIM MAX4740, MAX4740H Technical data

General Description

The MAX4740/MAX4740H low on-resistance (0.61Ω
typ) analog switches operate from a single 1.6V to 5.5V
supply. The MAX4740/MAX4740H are quad, single­pole, double-throw (SPDT) switches and are configured
to route audio signals. The MAX4740/MAX4740H are
pin-to-pin compatible parts with the ST Microelectronics
quad SPDT STG3699 analog switch.

The MAX4740 is a quad SPDT switch and the
MAX4740H is a quad SPDT switch that can be placed
in a high-impedance mode. Switching logic is con­trolled by 2 control bits (CB1 and CB2). The MAX4740/
MAX4740H also feature a low on-resistance match
(0.06Ω) and low power-supply current (0.3µA), which
increases battery life.

The MAX4740/MAX4740H are available in a tiny 3mm x
3mm, 16-pin TQFN-EP, and 2.5mm x 2.5mm, 16-pin ultra­thin QFN packages.

Applications

Voice Switching

Cellular Phones

PDAs and other Handheld Devices

MP3 Player

Notebook Computers

Features

♦ Low On-Resistance (0.61Ω typ)
♦ 0.06Ω (typ) Channel-to-Channel Matching
♦ 0.32Ω (typ) On-Resistance Flatness
♦ 1.6V to 5.5V Single-Supply Voltage
♦ High PSRR Reduces Supply Noise (-60dB typ)
♦ 0.08% Total Harmonic Distortion
♦ -68dB typ Crosstalk (100kHz)
♦ -64dB typ Off-Isolation (100kHz)
♦ Low Supply Current (0.3µA typ)
♦ Low Leakage Current (0.1µA typ)
♦ Pin-to-Pin Compatible with ST Micro STG3699
♦ (3mm x 3mm) 16-Pin TQFN, and (2.5mm x 2.5mm)

16-Pin Ultra-Thin QFN Packages

MAX4740/MAX4740H

Quad SPDT Audio Switches

________________________________________________________________

Maxim Integrated Products

1

19-0558; Rev 1; 11/07

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 Configuration

Ordering Information

INTERNAL
SPEAKER

GND

EXTERNAL
HEADPHONES

EXTERNAL
HEADPHONES

BLOCKING CAPS

MIDI

(RINGER)

NC1

NC2

NC3

NC4

NO4

NO3

NO2

NO1

COM1

COM2

COM3

COM4

V

CC

1.6V to 5.5V

CB1

CB2

BASEBAND

(SPEECH)

CONTROL

LOGIC

MAX4740

Typical Operating Circuit

PART PIN-PACKAGE

TOP

PKG

CODE

MAX4740ETE+

16 TQFN-EP
(3mm x 3mm)

AEV

T1633-4

MAX4740EVE+

V162A2-1

MAX4740HETE+

16 TQFN-EP
(3mm x 3mm)

AEW

T1633-4

MAX4740HEVE+

V162A2-1

Note: All devices are guaranteed over the -40°C to +85°C
temperature range.
EP = Exposed pad.

MARK

16 Ultra-Thin QFN
(2.5mm x 2.5mm)

16 Ultra-Thin QFN
(2.5mm x 2.5mm)

+AAA

+AAB

TOP VIEW

COM4

NO4

CB2

NC3

12 11 10 9

*CONNECT EP TO GND OR LEAVE EP UNCONNECTED.

NC4

13

V

CC

14

MAX4740

NO1

15

COM1

16

+

2.5mm x 2.5mm Ultra-Thin QFN

MAX4740H

1234

CB1

NC1

3mm x 3mm Thin QFN/

NO2

*EP

COM2

COM3

8

NO3

7

GND

6

5

NC2

MAX4740/MAX4740H

Quad SPDT Audio 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.

(All voltages referenced to GND.)
V

CC

, CB_ ...............................................................-0.3V to +6.0V

COM_, NC_, NO_ .......................................-0.3V to (V

CC

+ 0.3V)

Continuous Current NO_, NC_, COM_ ..........................±300mA

Peak Current NO_, NC_, COM_

(pulsed at 1ms, 50% duty cycle).................................±400mA

Peak Current NO_, NC_, COM_

(pulsed at 1ms, 10% duty cycle).................................±500mA

Continuous Power Dissipation (T

A

= +70°C)
16-Pin TQFN (3mm x 3mm), Single-Layer Board

(derate 15.6mW/°C above +70°C)..............................1250mW

16-Pin TQFN (3mm x 3mm), Multilayer Board (derate

20.8mW/°C above +70°C) ..........................................1667mW

16-Pin Ultra-Thin QFN (2.5mm x 2.5mm), MultiLayer

Board (derate 11.5mW/°C above +70°C) .................923.8mW

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 TA= +25°C, VCC= +3.3V.) (Note 1)

PARAMETER

CONDITIONS

POWER SUPPLY

Supply Voltage Range V

CC

1.6 5.5 V

VCC = +5.5V, VCB_ = 0V or V

CC

0.3 1

VCC = +5.5V, VCB_ = 0.5V or +1.6V 0.3 5

Supply Current I

CC

VCC = +2.5V, VCB_ = 0.5V or +1.4V 0.1

µA

ANALOG SWITCH

Analog Signal Range

V

NC

_,

V

NO

_,

(Note 2) 0

V

TA = +25°C

On-Resistance R

ON

VCC = 3.3V, I

COM_

=
100mA; CB_ = low or
high

T

A

= T

MIN

to

T

MAX

1

Ω

TA = +25°C

On-Resistance Match Between
Channels

ΔR

ON

VCC = 3.3V, VNC_ or
V

NO

_ = 0.875V; I

COM_

=

100mA (Note 3)

T

A

= T

MIN

to

T

MAX

0.1

Ω

TA = +25°C

On-Resistance Flatness

)

VCC = 3.3V, V

COM_

= 0

to V

CC

; I

COM_

= 100mA

(Note 4)

T

A

= T

MIN

to

T

MAX

Ω

NO_, NC_ Off-Leakage Current

(

),

)

VCC = 5.5V; VNC_ or VNO_ = 0.3V, 5.5V;
V

COM

_ = 5.5V or 0.3V

-1 0.1 +1 µA

COM_ On-Leakage Current

(ON)

VCC = 5.5V, VNC_ or VNO_ = 0.3V, 5.5V, or
unconnected; V

COM

_ = 0.3V, 5.5V, or

unconnected

-1 0.1 +1 µA

SYMBOL

MIN TYP MAX UNITS

V

_,

COM

R

FLAT(NO

INO_

OFF

I

NC_(OFF

I

_

COM

0.61 0.90

0.06

0.32 0.72

V

CC

0.87

MAX4740/MAX4740H

Quad SPDT Audio Switches

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C, VCC= 3.3V.) (Note 1)

PARAMETER

CONDITIONS

DYNAMIC CHARACTERISTICS

For N O_, V

N O_

= 1V 70

Turn-On Time t

ON

RL = 32Ω, CL =
35pF, Figure 2

For N C _, V

N C _

= 1V

ns

For N O_, V

N O_

= 1V

Turn-Off Time t

OFF

RL = 32Ω, CL =
35pF, Figure 2

For N C _, V

N C _

= 1V 55

ns

Charge Injection Q

V

GEN

_ = 0V; R

GEN

= 0Ω; CL = 1nF;

Figure 3

pC

Off-Isolation V

ISO

CL = 5pF; RL = 32Ω; f = 100kHz;
V

COM

_ = 1V

RMS

; Figure 4 (Note 5)

-64 dB

Crosstalk V

CT

CL = 5pF; RL = 32Ω; f = 100kHz;
V

COM

_ = 1V

RMS

; Figure 4

-68 dB

Power-Supply Rejection Ratio PSRR

f = 20kHz, V

COM_

= 1V

RMS, RL

= 50Ω,

C

L

= 5pF

-60 dB

Total Harmonic Distortion THD f = 20Hz to 20kHz, V

P-P

= 0.5V, RL = 32Ω

%

NO_, NC_ Off-Capacitance

)

(

)

f = 1MHz, Figure 5 40 pF

COM_ On-Capacitance

(ON)

f = 1MHz, Figure 5

pF

DIGITAL INPUTS (CB_)

VCC = 1.6V to 2.7V 1.4

Input Logic-High V

IH

VCC = 2.7V to 5.5V 1.6

V

Input Logic-Low V

IL

0.5 V

Input Leakage Current I

IN

-1 0.1 +1 µA

Note 1: For TQFN (3mm x 3mm) electrical specifications are production tested at TA= +85°C and guaranteed by design at TA= +25°C

and -40°C. For Ultra-Thin QFN (2.5mm x 2.5mm) electrical specifications are production tested at T

A

= +25°C and guaranteed by

design at T

A

= +85°C and -40°C.

Note 2: Signals on COM_, NO_, or NC_ exceeding V

CC

are clamped by internal diodes. Limit forward-diode current to maximum

current rating.

Note 3: ΔR

ON

= R

ON(MAX)

- R

ON(MIN)

.

Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the

specified analog signal ranges.

Note 5: Off-isolation = 20log10 [V

COM_

/ V

NO_

], V

COM_

= output, V

NO_

= input to off switch.

SYMBOL

C

NC_(OFF

C

_

NO

C

_

COM

,

OFF

MIN TYP MAX UNITS

210

210

200

0.08

150

MAX4740/MAX4740H

Quad SPDT Audio Switches

4 _______________________________________________________________________________________

Typical Operating Characteristics

(VCC= 3.3V, TA= +25°C, unless otherwise noted)

0.2

0.3

0.5

0.4

0.6

0.7

0 1.00.5 1.5 2.0 2.5 3.0

ON-RESISTANCE

vs. COM VOLTAGE

MAX4740/40H toc01

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

VCC = 3V

TA = +85°C

TA = +25°C

TA = -40°C

0.1

0.2

0.4

0.3

0.5

0.6

021345

ON-RESISTANCE

vs. COM VOLTAGE

MAX4740/40H toc02

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

TA = +85°C

TA = +25°C

TA = -40°C

VCC = 5V

0

200

400

600

1.8 2.8 3.8 4.82.3 3.3 4.3 5.3

NC TURN-ON/NO TURN-OFF TIME

vs. SUPPLY VOLTAGE

MAX4740/40H toc03

SUPPLY VOLTAGE (V)

TIME (ns)

NC TURN-ON TIME

NO TURN-OFF TIME

20

60

40

100

80

120

140

160

180

1.8 2.8 3.32.3 3.8 4.3 4.8 5.3

NO TURN-ON/NC TURN-OFF TIME

vs. SUPPLY VOLTAGE

MAX4740/40H toc04

SUPPLY VOLTAGE (V)

TURN-ON/TURN-OFF TIME (ns)

NC TURN-OFF TIME

NO TURN-ON TIME

NO TURN-ON/NC TURN-OFF TIME

vs. TEMPERATURE

MAX4740/40H toc05

TEMPERATURE (°C)

TURN-ON/TURN-OFF TIME (ns)

603510-15

40

60

80

100

20

-40 85

VCC = 3V

NO t

ON

NC t

OFF

NC TURN-ON/NO TURN-OFF TIME

vs. TEMPERATURE

MAX4740/40H toc06

TEMPERATURE (°C)

TURN-ON/TURN-OFF TIME (ns)

603510-15

200

300

400

500

100

-40 85

VCC = 3V

NC t

ON

NO t

OFF

0

0.4

1.2

0.8

1.6

2.0

1.8 2.8 3.32.3 3.8 4.3 4.8 5.3

LOGIC THRESHOLD

vs. SUPPLY VOLTAGE

MAX4740/40H toc07

SUPPLY VOLTAGE (V)

LOGIC THRESHOLD (V)

VCB RISING

VCB FALLING

0

20

10

40

30

90

50

100

0 1.0 1.50.5 2.0 2.5 3.0

SUPPLY CURRENT

vs. LOGIC INPUT VOLTAGE

MAX4740/40H toc08

LOGIC INPUT VOLTAGE (V)

SUPPLY CURRENT (nA)

VCC =

3V
VCC =

2.5V

VCC = 3V

VCC = 2.5V

1.4

80

70

60

0

50

150

100

200

250

021345

CHARGE INJECTION

vs. COM VOLTAGE

MAX4740/40H toc09

V

COM

(V)

CHARGE INJECTION ( pC)

VCC = 2.0V

VCC = 5.0V