MAX4850ETE+T - Maxim Integrated

General Description

The MAX4850/MAX4850H/MAX4852/MAX4852H family

of dual SPDT (single-pole/double-throw) switches oper-

ate from a single +2V to +5.5V supply and can handle

signals greater than the supply rail. These switches fea-

ture low 3.5Ωor 3.5Ω/7Ωon-resistance with low on-

capacitance, making them ideal for switching audio

and data signals.

The MAX4850/MAX4850H are configured with two

SPDT switches and feature two comparators for head-

phone detection or mute/send key functions. The

MAX4852 has two SPDT switches with no comparators

for low 1µA supply current.

For over-rail applications, these devices offer either the

pass-through or high-impedance option. For the

MAX4850/MAX4852, the signal (up to 5.5V) passes

through the switch without distortion even when the posi-

tive supply rail is exceeded. For the MAX4850H/

MAX4852H, the switch input becomes high impedance

when the input signal exceeds the supply rail.

The MAX4850/MAX4850H/MAX4852/MAX4852H are

available in the space-saving (3mm x 3mm), 16-pin

TQFN package and operate over the extended temper-

ature range of -40°C to +85°C.

Applications

USB Switching

Audio-Signal Routing

Cellular Phones

Notebook Computers

PDAs and Other Handheld Devices

Features

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

Switching Compliant

♦Switch Signals Greater than VCC

♦0.1ns Differential Skew

♦3.5Ω/7ΩOn-Resistance

♦135MHz -3dB Bandwidth

♦+2V to +5.5V Supply Range

♦1.8V Logic Compatible

♦Low Supply Current

1µA (MAX4852)

5µA (MAX4850)

10µA (MAX4850H/MAX4852H)

♦Available in a Space-Saving (3mm x 3mm),

16-Pin TQFN Package

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

VCC

MAX4850

MAX4850H

NC1

NO1

NC2

NO2

COUT2

COM1

IN1

IN2

COM2

CIN2

VCC

COUT1

CIN1

MAX4852

MAX4852H

NC1

NO1

NC2

NO2

COM1

IN1

IN2

COM2

MAX4850_

MAX4852_

IN_ NO_ NC_

0 OFF ON

1 ON OFF

SWITCHES SHOWN FOR

LOGIC 0 INPUT

3.5Ω

7Ω

3.5Ω

7Ω

Block Diagrams/Truth Table

19-3375; Rev 0; 7/04

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.

*EP = Exposed paddle.

PART TEMP RANGE PIN-PACKAGE TOP

MARK

MAX4850ETE -40°C to +85°C 16 TQFN-EP* ABU

MAX4850HETE -40°C to +85°C 16 TQFN-EP* ABV

MAX4852ETE -40°C to +85°C 16 TQFN-EP* ABZ

MAX4852HETE -40°C to +85°C 16 TQFN-EP* ACA

Pin Configurations and Selector Guide appear at end of

data sheet.

Dual SPDT Analog Switches with

Over-Rail Signal Handling

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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 other-

wise noted.) (Note 2)

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_,

NC_ to GND (Note 1).........................................-0.3V to +6.0V

COUT_........................................................-0.3V to (VCC + 0.3V)

COUT_ Continuous Current..............................................±20mA

Closed Switch Continuous Current COM_, NO_, NC_

3.5ΩSwitch ................................................................±100mA

7ΩSwitch .....................................................................±50mA

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

3.5ΩSwitch ................................................................±200mA

7ΩSwitch ...................................................................±100mA

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

3.5ΩSwitch ................................................................±240mA

7ΩSwitch ...................................................................±120mA

Continuous Power Dissipation (TA= +70°C)

16-Pin TQFN (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

MAX4850/MAX4850H/MAX4852/MAX4852H

Note 1: Signals on IN, NO, NC, or COM below GND are clamped by internal diodes. Limit forward-diode current to maximum

current rating.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage VCC 2.0 5.5 V

MAX4850 5 10

MAX4850H/

MAX4852H 10 20

Supply Current ICC VCC = 5.5V, VIN_ = 0V or VCC

MAX4852 1

µA

ANALOG SWITCH (3.5Ω Switch)

Analog Signal Range VNO_, VNC_,

VCOM_ 0 5.5 V

TA = +25°C 3.5 4.5

On-Resistance (Note 3) RON

VCC = 3V, ICOM_ = 10mA,

VNC_ or VNO_ = 0 to 5.5V

(MAX485_) or VCC (MAX485_H)

TA = -40°C

to +85°C 5Ω

TA = +25°C 0.1 0.2

On-Resistance Match

Between Channels

(Notes 3, 4)

ΔRON VCC = 3V, ICOM = 10mA,

VNC_ or VNO_ = 1.5V TA = -40°C

to +85°C 0.25 Ω

TA = +25°C 1.2 1.8

On-Resistance Flatness

(Note 5) RFLAT VCC = 3V, ICOM_ = 10mA,

VNC_ or VNO_ = 1V, 2V, 3V TA = -40°C

to +85°C 2Ω

TA = +25°C -2 +2

NO_/NC_ Off-Leakage

Current IOFF VCC = 5.5V, VNC_ or VNO_ = 1V

or 4.5V, VCOM_ = 4.5V or 1V TA = -40°C

to +85°C -10 +10 nA

TA = +25°C -2 +2

COM_ On-Leakage Current ION

VCC = 5.5V; VNC_ or VNO_ = 1V,

4.5V, or floating;

VCOM_ = 1V, 4.5V, or floating

TA = -40°C

to +85°C -12.5 +12.5 nA

-3dB Bandwidth BW Signal = 0dBm, RL = 50Ω, CL = 5pF (Figure 5) 100 MHz

NO_/NC_ Off-Capacitance COFF f = 1MHz (Figure 6) 20 pF

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog 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 other-

wise noted.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

COM On-Capacitance CON f = 1MHz (Figure 6) 60 pF

ANALOG SWITCH (7Ω Switch)

Analog Signal Range VNO_, VNC_,

VCOM_ 0 5.5 V

TA = +25°C 7 9

On-Resistance RON

VCC = 3V, ICOM_ = 10mA, VNC_

or VNO_ = 0 to 5.5V (MAX4852)

or VCC (MAX4852H)

TA = -40°C

to +85°C 10 Ω

TA = +25°C 0.2 0.4

On-Resistance Match

Between Channels

(Notes 3, 4)

ΔRON VCC = 3V, ICOM = 10mA, VNC_ or

VNO_ = 1.5V TA = -40°C

to +85°C 0.5 Ω

TA = +25°C 2.5 3.75

On-Resistance Flatness

(Note 5) RFLAT VCC = 3V, ICOM_ = 10mA, VNC_

or VNO_ = 1V, 2V, 3V TA = -40°C

to +85°C 4.0 Ω

TA = +25°C -2 +2

NO_/NC_ Off-Leakage

Current IOFF VCC = 5.5V, VNC_ or VNO_ = 1V

or 4.5V, VCOM_ = 4.5V or 1V TA = -40°C

to +85°C -10 +10 nA

TA = +25°C -2 +2

COM_ On-Leakage Current ION

VCC = 5.5V; VNC_ or VNO_ = 1V,

4.5V, or floating; VCOM_ = 1V,

4.5V, or floating

TA = -40°C

to +85°C -12.5 +12.5 nA

-3dB Bandwidth BW Signal = 0dBm, RL = 50Ω, CL = 5pF (Figure 5) 135 MHz

NO_/NC_ Off-Capacitance COFF f = 1MHz (Figure 6) 12 pF

COM On-Capacitance CON f = 1MHz (Figure 6) 50 pF

DYNAMIC CHARACTERISTICS

Signal Over-Rail to High-Z

Switching Time tHIZ MAX4850H/MAX4852H, VNO_ or VNC_ = VCC to

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

High-Z to Low-Z Switching

Time tHIZB MAX4850H/MAX4852H, VNO_ or VNC_ =

(VCC + 0.5V) to VCC, VCC < 5V (Figure 1) 0.5 1 µs

Skew (Note 3) tSKEW RS = 39Ω, CL = 50pF (Figure 2) 0.1 1 ns

Propagation Delay (Note 3) tPD RS = 39Ω, CL = 50pF (Figure 2) 0.9 2 ns

TA = +25°C 40 60

Turn-On Time tON VCC = 3V, VNO_ or VNC_ = 1.5V,

RL = 300Ω, CL = 50pF (Figure 1) TA = -40°C

to +85°C 100 ns

TA = +25°C 30 40

Turn-Off Time tOFF VCC = 3V, VNO_ or VNC_ = 1.5V,

RL = 300Ω, CL = 50pF (Figure 1) TA = -40°C

to +85°C 60 ns

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog 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 other-

wise noted.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

TA = +25°C 15

Break-Before-Make Time

Delay (Note 3) tDVCC = 3V, VNO_ or VNC_ = 1.5V,

RL = 300Ω, CL = 50pF (Figure 3) TA = -40°C

to +85°C 2ns

Charge Injection Q VCOM_ = 1.5V, RS = 0Ω, CL = 1nF (Figure 4) 8 pC

Off-Isolation (Note 6) VISO f = 100kHz, VCOM_= 1VRMS, RL = 50Ω,

CL = 5pF (Figure 5) -80 dB

Crosstalk VCT f = 1MHz, VCOM_ = 1VRMS, RL = 50Ω, CL = 5pF

(Figure 5) -95 dB

Total Harmonic Distortion THD f = 20Hz to 20kHz, VCOM_ = 1V + 2VP-P,

RL = 600Ω0.04 %

DIGITAL I/O (IN_)

VCC = 2V to 3.6V 1.4

Input-Logic High Voltage VIH VCC = 3.6V to 5.5V 1.8 V

VCC = 2V to 3.6V 0.5

Input-Logic Low Voltage VIL VCC = 3.6V to 5.5V 0.8 V

Input Leakage Current IIN VIN_ = 0 or 5.5V -0.5 +0.5 µA

COMPARATOR

Comparator Range 0 5.5 V

Comparator Threshold VTH VCC = 2V to 5.5V, falling input 0.3 x

VCC

0.33 x

VCC

0.36 x

VCC V

Comparator Hysteresis VCC = 2V to 5.5V 50 mV

Comparator Output High

Voltage ISOURCE = 1mA VCC -

0.4V V

Comparator Output Low

Voltage ISINK = 1mA 0.4 V

Rising input (Figure 7) 2.5

Comparator Switching Time

Falling input (Figure 7) 0.5

µs

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

temperature range.

Note 3: Guaranteed by design and characterization; not production tested.

Note 4: ΔRON = RON(MAX) - RON(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 = 20log10 (VCOM_ / VNO_), VCOM_ = output, VNO_ = input to off switch.

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

_______________________________________________________________________________________ 5

MAX4850/MAX4852

ON-RESISTANCE vs. COM VOLTAGE

MAX4850 toc01

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

3.5Ω SWITCH

VCC = 1.8V

VCC = 2.0V

VCC = 2.3V

VCC = 2.5V

VCC = 3.0V

VCC = 5.0V

MAX4850/MAX4852

ON-RESISTANCE vs. COM VOLTAGE

MAX4850 toc02

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

0.5

VCC = 3.0V

3.5Ω SWITCH

TA = +85°C

TA = +25°C

TA = -40°C

MAX4850/MAX4852

ON-RESISTANCE vs. COM VOLTAGE

MAX4850 toc03

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

1.0

1.5

2.0

2.5

3.0

3.5

0.5

VCC = 5.0V

3.5Ω SWITCH

TA = +85°C

TA = +25°C

TA = -40°C

MAX4850H/MAX4852H

ON-RESISTANCE vs. COM VOLTAGE

MAX4850 toc04

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

VCC = 1.8V 3.5Ω SWITCH

VCC = 2.0V

VCC = 2.3V

VCC = 2.5V

VCC = 3.0V VCC = 5.0V

MAX4850H/MAX4852H

ON-RESISTANCE vs. COM VOLTAGE

MAX4850 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

MAX4850H/MAX4852H

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

VCC = 5.0V

3.5Ω SWITCH

TA = +85°C

TA = +25°C

TA = -40°C

MAX4852

ON-RESISTANCE vs. COM VOLTAGE

MAX4850 toc07

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

VCC = 1.8V

7Ω SWITCH

VCC = 2.0V

VCC = 2.3V

VCC = 2.5V

VCC = 3.0V VCC = 5.0V

MAX4852

ON-RESISTANCE vs. COM VOLTAGE

MAX4850 toc08

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

VCC = 3.0V

7Ω SWITCH

TA = +85°C

TA = +25°C

TA = -40°C

MAX4852

ON-RESISTANCE vs. COM VOLTAGE

MAX4850 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

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.)

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

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

MAX4852H

ON-RESISTANCE vs. COM VOLTAGE

MAX4850 toc10

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

VCC = 1.8V

7Ω SWITCH

VCC = 2.0V

VCC = 2.3V

VCC = 2.5V

VCC = 3.0V VCC = 5.0V

MAX4852H

ON-RESISTANCE vs. COM VOLTAGE

MAX4850 toc11

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

2.52.01.51.00.5

0 3.0

VCC = 3.0V

7Ω SWITCH

TA = +85°C

TA = +25°C

TA = -40°C

MAX4852H

ON-RESISTANCE vs. COM VOLTAGE

MAX4850 toc12

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

431 2

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

1.5

VCC = 5.0V

7Ω SWITCH

TA = +85°C

TA = +25°C

TA = -40°C

MAX4850

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX4850 toc13

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (μA)

4.53.52.5

1.5 5.5

TA = -40°C

TA = +25°CTA = +85°C

MAX4850H

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX4850 toc14

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (μA)

4.53.52.5

1.5 5.5

TA = -40°C

TA = +25°CTA = +85°C

TA = -40°C

TA = +25°CTA = +85°C

MAX4852

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX4850 toc15

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (nA)

4.53.52.5

0.5

1.0

1.5

2.0

2.5

3.0

3.5

1.5 5.5

TA = -40°C

TA = +85°C

TA = +25°C

MAX4852H

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX4850 toc16

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (μA)

4.53.52.5

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

3.0

1.5 5.5

TA = -40°C

TA = +25°C

TA = +85°C

TURN-ON/TURN-OFF TIME

vs. SUPPLY VOLTAGE

MAX4850 toc17

SUPPLY VOLTAGE (V)

TURN-ON/TURN-OFF TIME (ns)

4.53.52.5

1.5 5.5

tON

tOFF

3.5Ω SWITCH

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

_______________________________________________________________________________________ 7

TURN-ON/TURN-OFF TIME

vs. TEMPERATURE

MAX4850 toc18

TEMPERATURE (°C)

TURN-ON/TURN-OFF TIME (ns)

603510-15

-40 85

tON

3.5Ω SWITCH

tOFF

TURN-ON/TURN-OFF TIME

vs. SUPPLY VOLTAGE

MAX4850 toc19

SUPPLY VOLTAGE (V)

TURN-ON/TURN-OFF TIME (ns)

4.53.52.5

1.5 5.5

tON

tOFF

7Ω SWITCH

TURN-ON/TURN-OFF TIME

vs. TEMPERATURE

MAX4850 toc20

TEMPERATURE (°C)

TURN-ON/TURN-OFF TIME (ns)

603510-15

-40 85

7Ω SWITCH

tOFF

tON

LOGIC THRESHOLD vs. SUPPLY VOLTAGE

MAX4850 toc21

SUPPLY VOLTAGE (V)

LOGIC THRESHOLD (V)

4.53.52.5

0.8

1.0

1.2

1.4

1.6

0.6

1.5 5.5

VIN RISING

VIN FALLING

CHARGE INJECTION vs. COM VOLTAGE

MAX4850 toc22

COM VOLTAGE (V)

CHARGE INJECTION (pC)

4321

3.5Ω SWITCH

VCC = 3V

VCC = 5V

CHARGE INJECTION vs. COM VOLTAGE

MAX4850 toc23

COM VOLTAGE (V)

CHARGE INJECTION (pC)

4321

7Ω SWITCH

VCC = 3V

VCC = 5V

LEAKAGE CURRENT vs. TEMPERATURE

MAX4850 toc24

TEMPERATURE (°C)

LEAKAGE CURRENT (nA)

603510-15

0.2

0.4

0.6

0.8

1.0

1.2

1.4

-40 85

3.5Ω SWITCH

COM ON-LEAKAGE

COM OFF-LEAKAGE

LEAKAGE CURRENT vs. TEMPERATURE

MAX4850 toc25

TEMPERATURE (°C)

LEAKAGE CURRENT (nA)

6035-15 10

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

-40 85

7Ω SWITCH

COM ON-LEAKAGE

COM OFF-LEAKAGE

Typical Operating Characteristics (continued)

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

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

8 _______________________________________________________________________________________

FREQUENCY RESPONSE

MAX4850 toc26

FREQUENCY (MHz)

FREQUENCY RESPONSE (dB)

100101

-80

-60

-40

-20

-100

0.1 1000

OFF-RESPONSE

ON-RESPONSE

CROSSTALK

3.5Ω SWITCH

FREQUENCY RESPONSE

MAX4850 toc27

FREQUENCY (MHz)

FREQUENCY RESPONSE (dB)

100101

-80

-60

-40

-20

-100

0.1 1000

OFF-RESPONSE

ON-RESPONSE

CROSSTALK

7Ω SWITCH

TOTAL HARMONIC DISTORTION

vs. FREQUENCY

MAX4850 toc28

FREQUENCY (Hz)

THD (%)

10k1k100

0.1

10 100k

0.01

3.5Ω SWITCH

RL = 600Ω

TOTAL HARMONIC DISTORTION

vs. FREQUENCY

MAX4850 toc29

FREQUENCY (Hz)

THD (%)

10k1k100

0.1

10 100k

0.01

7Ω SWITCH

RL = 600Ω

Typical Operating Characteristics (continued)

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

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

_______________________________________________________________________________________ 9

COMPARATOR THRESHOLD

vs. TEMPERATURE

MAX4850 toc30

TEMPERATURE (°C)

COMPARATOR THRESHOLD (V)

603510-15

1.02

1.04

1.06

1.08

1.10

1.00

-40 85

VCMPI_ RISING

VCMPI_ FALLING

VCC = 3.0V

COMPARATOR THRESHOLD

vs. TEMPERATURE

MAX4850 toc31

TEMPERATURE (°C)

COMPARATOR THRESHOLD (V)

603510-15

1.625

1.650

1.675

1.700

1.725

1.750

1.600

-40 85

VCMPI_ RISING

VCMPI_ FALLING

VCC = 5.0V

MAX4850/MAX4852

SWITCH PASSING SIGNALS

ABOVE SUPPLY VOLTAGE

MAX4850 toc32

VNC

2V/div

VCOM

200μs/div

VCC = 3.0V

MAX4850H/MAX4852H

SWITCH ENTERING

HIGH-IMPEDANCE STATE

MAX4850 toc33

200μs/div

VNC

2V/div

VCOM

VCC = 3.0V

HI-Z

STATE

HI-Z

STATE

Typical Operating Characteristics (continued)

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

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

10 ______________________________________________________________________________________

Pin Descriptions

MAX4850/MAX4850H

PIN NAME FUNCTION

1, 8 N.C. No Connection. Not internally connected.

2 CIN1 Inverting Input for Comparator 1

3 CIN2 Inverting Input for Comparator 2

4 COM1 Common Terminal for Analog Switch 1

5 NO1 Normally Open Terminal for Analog Switch 1

6 GND Ground

7 NC2 Normally Closed Terminal for Analog Switch 2

9 IN2 Digital Control Input for Analog Switch 2. A logic LOW on IN2 connects COM2 to NC2 and a logic

HIGH connects COM2 to NO2.

10 COM2 Common Terminal for Analog Switch 2

11 COUT1 Output for Comparator 1

12 NO2 Normally Open Terminal for Analog Switch 2

13 COUT2 Output for Comparator 2

14 VCC Supply Voltage. Bypass to GND with a 0.01µF capacitor as close to the pin as possible.

15 IN1 Digital Control Input for Analog Switch 1. A logic LOW on IN1 connects COM1 to NC1 and a logic

HIGH connects COM1 to NO1.

16 NC1 Normally Closed Terminal for Analog Switch 1

EP — Exposed Paddle. Connect to PC board ground plane.

MAX4852/MAX4852H

PIN NAME FUNCTION

1, 2, 3, 8, 11, 13 N.C. No Connection. Not internally connected.

4 COM1 Common Terminal for Analog Switch 1

5 NO1 Normally Open Terminal for Analog Switch 1

6 GND Ground

7 NC2 Normally Closed Terminal for Analog Switch 2

9 IN2 Digital Control Input for Analog Switch 2. A logic LOW on IN2 connects COM2 to NC2 and a logic

HIGH connects COM2 to NO2.

10 COM2 Common Terminal for Analog Switch 2

12 NO2 Normally Open Terminal for Analog Switch 2

14 VCC Supply Voltage. Bypass to GND with a 0.01µF capacitor as close to the pin as possible.

15 IN1 Digital Control Input for Analog Switch 1. A logic LOW on IN1 connects COM1 to NC1 and a logic

HIGH connects COM1 to NO1.

16 NC1 Normally Closed Terminal for Analog Switch 1

EP — Exposed Paddle. Connect to PC board ground plane.

Detailed Description

The MAX4850/MAX4850H/MAX4852/MAX4852H are low

on-resistance, low-voltage, analog switches that operate

from a +2V to +5.5V single supply and are fully specified

for nominal 3.0V applications. These devices feature

over-rail signal capability that allows signals up to 5.5V

with supply voltages down to 2.0V. These devices are

configured as dual SPDT switches.

These switches have low 50pF on-channel capacitance,

which allows for 12Mbps switching of the data signals for

USB 2.0 full speed/1.1 applications. The MAX485_ _ are

designed to switch D+ and D- USB signals with a guaran-

teed skew of less than 1ns (see Figure 1), as measured

from 50% of the input signal to 50% of the output signal.

The MAX4850_ feature a comparator that can be used

for headphone or mute detection. The comparator

threshold is internally generated to be approximately 1/3

of VCC.

Applications Information

Digital Control Inputs

The logic inputs (IN_) accept up to +5.5V even if the

supply voltages are below this level. For example, with a

+3.3V VCC supply, IN_ can be driven low to GND and

high to +5.5V, allowing for mixing of logic levels in a

system. Driving IN_ rail-to-rail minimizes power con-

sumption. For a +2V supply voltage, the logic thresholds

are 0.5V (low) and 1.4V (high); for a +5V supply voltage,

the logic thresholds are 0.8V (low) and 1.8V (high).

Analog Signal Levels

The on-resistance of these switches changes very little

for analog input signals across the entire supply volt-

age range (see Typical Operating Characteristics). The

switches are bidirectional, so NO_, NC_, and COM_

can be either inputs or outputs.

Comparator

The positive terminal of the comparator is internally set to

VCC/3. When the negative terminal (CIN_) is below the

threshold (VCC/3), the comparator output (COUT_) goes

high. When CIN_ rises above VCC/3, COUT_ goes low.

The comparator threshold allows for detection of head-

phones since headphone audio signals are typically

biased to VCC/2.

Power-Supply Sequencing

Caution: Do not exceed the absolute maximum ratings

because stresses beyond the listed ratings may cause

permanent damage to the device.

Proper power-supply sequencing is recommended for

all CMOS devices. Always apply VCC before applying

analog signals, especially if the analog signal is not

current-limited.

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

______________________________________________________________________________________ 11

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

12 ______________________________________________________________________________________

Test Circuits/Timing Diagrams

tR < 20ns

tF < 20ns

50%

LOGIC

INPUT

COM_

GND

IN_

CL INCLUDES FIXTURE AND STRAY CAPACITANCE.

VOUT = VNO ( RL )

RL + RON

VNO tOFF

NO_

0.9 x V0UT 0.9 x VOUT

tON

VOUT

SWITCH

OUTPUT

LOGIC

INPUT

IN DEPENDS ON SWITCH CONFIGURATION;

INPUT POLARITY DETERMINED BY SENSE OF SWITCH.

VCC

VOUT

MAX4850_

MAX4852_

VCC

SWITCH

INPUT

NORMAL MODE NORMAL MODE

HIGH-Z MODE

VCC + 0.5V

tHIZ

tHIZB

Figure 1. Switching Time

tskew_i

90%

50%

10%

90%

50%

10%

tfi

INPUT A

INPUT A-

tri

tskew_o

90%

50%

10%

90%

50%

10%

tfo

OUTPUT B

OUTPUT B-

tro

B-

A-

TxD+

TxD-

Rs = 39Ω

CL = 50pF

DELAY DUE TO SWITCH FOR RISING INPUT AND RISING OUTPUT SIGNALS.

DELAY DUE TO SWITCH FOR FALLING INPUT AND FALLING OUTPUT SIGNALS.

CHANGE IN SKEW THROUGH THE SWITCH FOR OUTPUT SIGNALS.

CHANGE IN SKEW THROUGH THE SWITCH FOR INPUT SIGNALS.

|tskew_i|

|tskew_o|

|tfo - tfi|

|tro - tri|

Figure 2. Input/Output Skew Timing Diagram

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

______________________________________________________________________________________ 13

50%

VCC

LOGIC

INPUT

VOUT 0.9 x VOUT

tBBM

LOGIC

INPUT

GND

CL INCLUDES FIXTURE AND STRAY CAPACITANCE.

NO_

IN_

NC_ VOUT

VCC

VN_ COM_

MAX4850_

MAX4852_

Figure 3. Break-Before-Make Interval

VGEN GND

COM_

VOUT

VCC VOUT

OFF ON OFF

ΔVOUT

Q = (ΔVOUT)(CL)

NC_

LOGIC-INPUT WAVEFORMS INVERTED FOR SWITCHES

THAT HAVE THE OPPOSITE LOGIC SENSE.

OFF ON OFF

VIL TO VIH

VCC

RGEN

IN_

MAX4850_

MAX4852_

OR NO_

Figure 4. Charge Injection

MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.

OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF", NO_ OR NC_ TERMINAL ON EACH SWITCH.

ON-LOSS IS MEASURED BETWEEN COM_ AND "ON", NO_ OR NC_ TERMINAL ON EACH SWITCH.

CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL.

SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.

+5V

VOUT

VCC

IN_

NC1

COM1

NO1*

VIN

MAX4850_

MAX4852_

OFF-ISOLATION = 20log VOUT

VIN

ON-LOSS = 20log VOUT

VIN

CROSSTALK = 20log VOUT

VIN

NETWORK

ANALYZER

50Ω

50Ω50Ω

50Ω

MEAS REF

10nF

0V OR VCC

50ΩGND

*FOR CROSSTALK THIS PIN IS NO2.

NC2 AND COM2 ARE OPEN.

Figure 5. On-Loss, Off-Isolation, and Crosstalk

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

14 ______________________________________________________________________________________

CAPACITANCE

METER NC_ OR

NO_

COM_

GND

IN VIL OR VIH

10nF VCC

f = 1MHz

VCC

MAX4850_

MAX4852_

Figure 6. Channel Off-/On-Capacitance

MAX4850_

VCC

VTH + 100mV

VTH - 100mV

VOUT

tCOMP tCOMP

50%

tR < 20ns

tF < 20ns

VCC

GND

VCOUT_

CIN_

COUT_

VCIN_

NO_

VTH = VCC/3

COMPARATOR

INPUT (VCIN_)

COMPARATOR

OUTPUT (VCOUT_)

Figure 7. Comparator Switching Time

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

______________________________________________________________________________________ 15

TOP VIEW

15 14 13

5678

NC1

IN1

VCC

COUT2

NO2

COUT1

COM2

IN2

CIN1

CIN2

COM1

NO1

GND

NC2

N.C.

MAX4850

MAX4850H

15 14 13

5678

NC1

IN1

VCC

N.C.

NO2

N.C.

COM2

IN2

N.C.

COM1

NO1

GND

NC2

N.C.

MAX4852

MAX4852H

THIN QFN THIN QFN

CONNECT EXPOSED PADDLE TO GROUND.

Pin Configurations

PART

RON

NC_/NO_

(Ω)

COMPARATORS OVER-RAIL

HANDLING

MAX4850 3.5/3.5 2

Input signal

passes through

the switch

MAX4850H 3.5/3.5 2 High-impedance

switch input

MAX4852 3.5/7 —

Input signal

passes through

the switch

MAX4852H 3.5/7 — High-impedance

switch input

Selector Guide

Chip Information

TRANSISTOR COUNT: 735

PROCESS: CMOS

DATA

SOURCE

AUDIO

SOURCE VCC

MUTE

BUTTON

VCC

MAX4850_

OUT+

OUT-

OUT+

OUT-

NC1

NO1

NC2

NO2

COUT

COM1

IN1

IN2

COM2

CIN

INPUT

SELECT

MUTE

Typical Operating Circuit

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

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

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.)

12x16L QFN THIN.EPS

0.10 C0.08 C

0.10 M C A B

D/2

E/2

E2/2

(ND - 1) X e

(NE - 1) X e

D2/2

PACKAGE OUTLINE

21-0136

8, 12, 16L THIN QFN, 3x3x0.8mm

MARKING

AAAA

EXPOSED PAD VARIATIONS

CODES

PKG.

T1233-1

MIN.

0.95

NOM.

1.10

NOM.

1.10

MAX.

1.25

MIN.

0.95

MAX.

1.25

12N

0.25

0.20 REF

0.02

0.05

0.45

2.90

0.20

2.90

0.70

0.50 BSC.

0.55

3.00

0.65

3.10

0.25

3.00

0.75

0.30

3.10

0.80

0.20 REF

0.25 -

0.02

0.05

0.50 BSC.

0.30

2.90

0.40

3.00

0.20

2.90

0.70

0.25

3.00

0.75

3.10

0.50

0.80

3.10

0.30

PKG

REF. MIN.

12L 3x3

NOM. MAX. NOM.

16L 3x3

MIN. MAX.

0.35 x 45°

PIN ID JEDEC

WEED-1

T1233-3 1.10 1.25 0.95 1.10 0.35 x 45°1.25 WEED-10.95

T1633F-3 0.65

T1633-4 0.95

0.80 0.95 0.65 0.80

1.10 1.25 0.95 1.10

0.225 x 45°

0.95 WEED-2

0.35 x 45°

1.25 WEED-2

T1633-2 0.95 1.10 1.25 0.95 1.10 0.35 x 45°

1.25 WEED-2

PACKAGE OUTLINE

21-0136

8, 12, 16L THIN QFN, 3x3x0.8mm

WEED-11.25

1.100.95 0.35 x 45°

1.251.10

0.95

T1233-4

T1633FH-3 0.65 0.80 0.95 0.225 x 45°

0.65 0.80 0.95 WEED-2

NOTES:

1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994.

2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.

3. N IS THE TOTAL NUMBER OF TERMINALS.

4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO

JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED

WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR

MARKED FEATURE.

5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20 mm AND 0.25 mm

FROM TERMINAL TIP.

6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY.

7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION.

8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS .

9. DRAWING CONFORMS TO JEDEC MO220 REVISION C.

10. MARKING IS FOR PACKAGE ORIENTATION REFERENCE ONLY.

11. NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY.

12. WARPAGE NOT TO EXCEED 0.10mm.

0.25 0.30 0.35

0.25

0.20 REF

0.02 0.05

0.35

0.55 0.75

2.90

2.90 3.00 3.10

0.65 BSC.

3.00 3.10

8L 3x3

MIN.

0.70 0.75 0.80

NOM. MAX.

TQ833-1 1.250.25 0.70 0.35 x 45°WEEC1.250.700.25

T1633-5 0.95 1.10 1.25 0.35 x 45°WEED-2

0.95 1.10 1.25