Datasheet

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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, single-

pole, 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 con-

trolled 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 ultra-

thin 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

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.

3mm x 3mm Thin QFN/

2.5mm x 2.5mm Ultra-Thin QFN

NC4

*CONNECT EP TO GND OR LEAVE EP UNCONNECTED.

1234

12 11 10 9

COM1

NO1

COM4

NO4

CB2

NC3

CB1

NO2

COM2

*EP

GND

NO3

COM3

NC2

NC1

MAX4740

MAX4740H

TOP VIEW

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

1.6V to 5.5V

CB1

CB2

BASEBAND

(SPEECH)

CONTROL

LOGIC

MAX4740

Typical Operating Circuit

PART PIN-PACKAGE

TOP

MARK

PKG

CODE

MAX4740ETE+

16 TQFN-EP

(3mm x 3mm)

AEV

T1633-4

MAX4740EVE+

16 Ultra-Thin QFN

(2.5mm x 2.5mm)

+AAA

V162A2-1

MAX4740HETE+

16 TQFN-EP

(3mm x 3mm)

AEW

T1633-4

MAX4740HEVE+

16 Ultra-Thin QFN

(2.5mm x 2.5mm)

+AAB

V162A2-1

Note: All devices are guaranteed over the -40°C to +85°C

temperature range.

EP = Exposed pad.

Summary of content (13 pages)

PAGE 1
9-0558; Rev 1; 11/07 Quad SPDT Audio Switches 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.
PAGE 2
MAX4740/MAX4740H Quad SPDT Audio Switches ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) VCC, CB_ ...............................................................-0.3V to +6.0V COM_, NC_, NO_ .......................................-0.3V to (VCC + 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)......................
PAGE 3
Quad SPDT Audio Switches MAX4740/MAX4740H 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.
PAGE 4
Typical Operating Characteristics (VCC = 3.3V, TA = +25°C, unless otherwise noted) 0.5 TA = +25°C 0.4 TA = -40°C 0.3 0.4 TA = +85°C 600 400 0.3 NC TURN-ON TIME 200 0.2 TA = +25°C TA = -40°C NO TURN-OFF TIME 0 0.1 1.5 2.0 2.5 3.0 0 1 2 3 4 COM VOLTAGE (V) NO TURN-ON/NC TURN-OFF TIME vs. SUPPLY VOLTAGE NO TURN-ON/NC TURN-OFF TIME vs. TEMPERATURE 140 120 100 NO TURN-ON TIME 80 60 100 VCC = 3V NO tON 80 60 NC tOFF 40 2.8 2.8 3.3 3.8 4.3 4.
PAGE 5
Quad SPDT Audio Switches LEAKAGE CURRENT vs. TEMPERATURE FREQUENCY RESPONSE 100 ON-LOSS (dB) ICOM(OFF) 1000 ICOM(ON) MAX4740/40H toc11 10,000 LEAKAGE CURRENT (pA) 0 MAX4740/40H toc10 100,000 -2 -4 10 1 -6 0.1 -40 -15 10 35 60 0.01 85 0.1 OFF-ISOLATION vs. FREQUENCY 10 100 CROSSTALK vs. FREQUENCY -20 -40 MAX4740/40H toc13 MAX4740/40H toc12 0 -20 CROSSTALK (dB) -60 -40 -60 -80 0.001 0.01 0.1 1 -80 0.001 10 0.01 0.
PAGE 6
Quad SPDT Audio Switches MAX4740/MAX4740H Pin Description PIN NAME FUNCTION 1 NC1 Analog Switch 1—Normally Closed Terminal 2 CB1 Digital Control Input for Analog Switch 1 and Analog Switch 2 3 NO2 Analog Switch 2—Normally Open Terminal 4 COM2 5 NC2 Analog Switch 2—Normally Closed Terminal 6 GND Ground 7 NO3 Analog Switch 3—Normally Open Terminal 8 COM3 Analog Switch 2—Common Terminal Analog Switch 3—Common Terminal 9 NC3 Analog Switch 3—Normally Closed Terminal 10 CB2 Digita
PAGE 7
Quad SPDT Audio Switches MAX4740/MAX4740H VCC MAX4740H VCC MAX4740 NC1 NC1 SWITCH 1 COM1 Hi Z COM1 SWITCH 1 NO1 NO1 NC2 NC2 SWITCH 2 Hi Z COM2 COM2 NO2 NO2 CB1 CB2 SWITCH 2 CB1 CB2 CONTROL LOGIC CONTROL LOGIC NC3 NC3 SWITCH 3 Hi Z COM3 COM3 SWITCH 3 NO3 NO3 NC4 NC4 COM4 SWITCH 4 COM4 Hi Z SWITCH 4 NO4 NO4 GND GND Figure 1.
PAGE 8
MAX4740/MAX4740H Quad SPDT Audio Switches Test Circuits/Timing Diagrams (continued) V CC MAX4740 MAX4740H ΔVOUT VCC RGEN VOUT COM_ NC_ OR NO_ VOUT CB_ OFF CL V GEN GND OFF ON CB_ VIL TO VIH ON OFF CB_ OFF Q = (ΔV OUT )(C L ) LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE. Figure 3.
PAGE 9
Quad SPDT Audio Switches VCC COM_ MAX4740 MAX4740H CAPACITANCE ANALYZER f = 1MHz MAX4740/MAX4740H 1μF CB_ VIL OR VIH NC_ OR NO_ GND Figure 5.
PAGE 10
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.) 12, 16L QFN.EPS MAX4740/MAX4740H Quad SPDT Audio Switches PACKAGE OUTLINE, 12,16L QFN, 3x3x0.
PAGE 11
Quad SPDT Audio Switches PACKAGE OUTLINE, 12,16L QFN, 3x3x0.90 MM 21-0102 G 1 2 ______________________________________________________________________________________ 11 MAX4740/MAX4740H 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.
PAGE 12
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.) ULTRA THIN QFN.
PAGE 13
Quad SPDT Audio Switches REVISION NUMBER REVISION DATE 0 5/06 Initial release 1 11/07 Adding ultra-thin QFN package DESCRIPTION PAGES CHANGED — 1, 2, 3, 10–13 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.