MAXIM MAX4947, MAX4948 User Manual

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General Description

The MAX4947/MAX4948 analog switches operate from a single +1.8V to +5.5V supply. These switches feature a low 30pF (typ) capacitance for high-speed data switching applications.

The MAX4947 is a triple double-pole/double-throw (DPDT) switch, and the MAX4748 is a hex single-pole/doublethrow (SPDT) switch with one control logic input. The MAX4947 has three logic inputs to control the switches in pairs. The MAX4948 has one logic input and an enable input (EN) to disable the switches.

The MAX4947/MAX4948 are available in small 24-pin (4mm x 4mm) TQFN and 25-bump (2.5mm x 2.5mm) chip-scale packages (UCSP™).

Applications

Features

♦ Multiplex SDIO or Memory Stick Interfaces ♦ 1.8V to 5.5V Supply Voltage Range ♦ Low On-Resistance 4Ω (typ) ♦ Low-Capacitance Switches, 30pF (typ) ♦ Rail-to-Rail Signal Handling ♦ Small 25-Bump UCSP™ (2.5mm x 2.5mm) and

24-TQFN (4mm x 4mm)

MAX4947/MAX4948

Hex SPDT Data Switch

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

MAX4947

S6

S5

COM6

COM5

S4

S3

COM4

COM3

S2

S1

V

CC

COM2

COM1

GND

NO1

NC1

NO2

NC2

NO3

NC3

NO4

NC4

NO5

NC5

NO6

NC6

CB12

CB34

CB56

MAX4948

S6

S5

COM6

COM5

S4

S3

COM4

COM3

S2

S1

V

CC

COM2

COM1

GND

NO1

NC1

NO2

NC2

NO3

NC3

NO4

NC4

NO5

NC5

NO6

NC6

CB

EN

Functional Diagram

19-0673; Rev 1; 1/07

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.

*

Future product—contact factory for availability.

+

Denotes lead-free package.

EP = Exposed paddle.

EVALUATION KIT

AVAILABLE

USB Signal Switching

UART Signal Switching

SDIO/Memory Stick

Cell Phones

PDAs

Typical Operating Circuit appears at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

PART

TEMP

RANGE

MAX4947EBA+* -40°C to +85°C 25 UCSP-25 B25-1

MAX4947ETG+ -40°C to +85°C 24 TQFN-EP T2444-4

MAX4948EBA+* -40°C to +85°C 25 UCSP-25 B25-1

MAX4948ETG+ -40°C to +85°C 24 TQFN-EP T2444-4

PINPACKAGE

PKG

CODE

MAX4947/MAX4948

Hex SPDT Data Switch

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= +3V, TA= +25°C.) (Notes 2, 3)

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.

VCCto GND ...........................................................-0.3V to +6.0V

All other pins to GND (Note 1)......................-0.3V to V

CC

+ 0.3V

Continuous Current

NO_, NC_, COM_ .......................................................±100mA

Peak Current NO_, NC_, COM_

(pulsed at 1ms, 50% Duty Cycle)................................±200mA

(pulsed at 1ms, 10% Duty Cycle)................................±300mA

Continuous Power Dissipation (T

A

= +70°C)

25-Bump UCSP (derate 12.2mW/°C above +70°C) ....976mW

24-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

Bump Temperature (soldering)

Infrared (15s) ...............................................................+220°C

Vapor Phase (60s) ...........................................................+215°C

Lead Temperature (soldering) .........................................+300°C

(

)

(ON)

Note 1: Signals on CB_, NO_, NC_, COM_, EN exceeding VCCor GND are clamped by internal diodes. Limit forward-diode current

to maximum current rating.

PARAMETER SYMBOL CONDITIONS T

POWER SUPPLY

Power-Supply Range V

CC

VCC = 5.5V, VCB_ = 0V or V

CC

VCC = 2.7V, VCB_ = 1.6V or 0.5V 5Power-Supply Current I

VCC = 5.5V, VCB_ = 1.6V or 0.5V

ANALOG SWITCH

MIN TYP MAX UNITS

A

T

to

CC

T

T T

MIN

MAX

MIN

MAX

1.8 5.5 V

1.0

to

10

µA

Analog Signal Range

_, VNC_,

NO

V

COM

_,

T T

MIN

MAX

to

0V

V

+25°C 4.0 5.5

On-Resistance (Note 4) R

ON

VCC = 2.7V, I

_ or VNO_ = 0 or V

V

NC

COM

_ = 10mA;

CC

T T

MIN

MAX

to

+25°C 0.3 0.5

On-Resistance Match Between Channels (Notes 4, 5)

ΔR

ON

VCC = 2.7V, I V

_ or VNC_ = 0 or V

NO

COM

_ = 10mA;

CC

T T

MIN

MAX

to

+25°C 0.5 1

On-Resistance Flatness (Notes 4, 6)

R

FLAT

VCC = 2.7V, I

COM

_ = 10mA;

VNC_ or VNO_ = 0 or V

CC

T T

MIN

MAX

to

+25°C -3 +3

NO_ or NC_ Off-Leakage Current

COM_ On-Leakage Current INO_

INO_

I

NC

(OFF)

_

OFF

or

VCC = 3.6V; V V

NO

VCC = 3.6V; V V

NO

unconnected

_ = 3.6V, 0;

COM

_ or VNC_ = 0, 3.6V

_ = 3.6V, 0;

COM

_ or VNC_ = 3.6V, 0 or

T

to

T

MIN

MAX

-10 +10

+25°C -6 +6

to

T T

MIN

MAX

-10 +10

CC

6.5

0.6

1.2

V

Ω

nA

MAX4947/MAX4948

Hex SPDT Data Switch

_______________________________________________________________________________________ 3

(

)

(

)

(ON)

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3V, TA= +25°C.) (Notes 2, 3)

PARAMETER SYMBOL CONDITIONS T

VCC = 3.6V (MAX4948);

COM_ Off-Leakage Current I

COM

_

OFF

V

_ = 3.3V, 0.3V;

COM

_ or VNC_ = 0, 3V, 3.3V

V

NO

DYNAMIC

VCC = 2.7V; VNO_ or VNC_= 1.5V;

Turn-On Time t

ON

= 50Ω;

R

L

C

= 35pF, Figure 1

L

VCC = 2.7V; VNO_ or VNC_= 1.5V;

Turn-Off Time t

Break-Before-Make t

OFF

BBM

= 50Ω;

R

L

C

= 35pF, Figure 1

L

V

= 2.7V; VNO_ or VNC_= 1.5V;

CC

R

= 50Ω; CL = 35pF, Figure 2

L

(Note 7)

HIGH-SPEED TIMING CHARACTERISTICS (rising time = 20ns)

Skew t

SKEW

Charge Injection Q

-3dB Bandwidth BW

VCC = 2.7V; RS = 39Ω; CL = 50pF, Figure 3

V

= 0, R

GEN

Figure 4

Signal = 0dBm, C

= 50Ω, Figure 5

R

L

CL = 5pF; RL = 50Ω;

Off-Isolation V

ISO

V

COM

_ = 1V

P-P

Figure 5 (Note 8)

Crosstalk V

C

NC_ or NO_ Off-Capacitance

COM_ Off-Capacitance C

COM_ On-Capacitance C

NC_(OFF)

CNO_

C OM _ ( OF F)

COM

CT

CL = 5pF; RL = 50Ω; f = 1MHz,

_ = 1V

V

COM

P-P

NC_ = NO_ = 0V, f = 1MHz Figure 6

OFF

V

= GND, f = 1MHz

COM

(MAX4948), Figure 6

_

COM_ = 0V, f = 1MHz, Figure 6 +25°C 30 pF

DIGITAL I/O (EN, CB_)

Input-Logic High V

Input-Logic Low V

Input Leakage Current I

CB

IH

IL

V

= 0 or V

CB_

CC

= 0, CL = 1nF ,

= 5pF,

L

, f = 1MHz,

, Figure 5 (Note 9)

+25°C -6 +6

T

MIN

T

MAX

+25°C 400 800

T

MIN

T

MAX

+25°C 300 800

T

MIN

T

MAX

+25°C 100

T

MIN

T

MAX

T

MIN

T

MAX

+25°C 10 pC

+25°C 300 MHz

+25°C -70 dB

+25°C -90 dB

+25°C 15 pF

+25°C 25 pF

T

MIN

T

MAX

T

MIN

T

MAX

T

MIN

T

MAX

MIN TYP MAX UNITS

A

to

-10 +10

to

2

to

1.6 V

0.2 ns

to

800

0.5 V

1µA

nA

ns

MAX4947/MAX4948

Hex SPDT Data Switch

4 _______________________________________________________________________________________

Typical Operating Characteristics

(VCC= 3V, TA = +25°C, unless otherwise noted.)

ON-RESISTANCE vs. V

COM

V

COM

(V)

ON-RESISTANCE (Ω)

MAX4947/48 toc01

012345

0

5

10

15

20

25

30

35

40

VCC = 1.8V

VCC = 2.0V

VCC = 2.3V

VCC = 2.7V

VCC = 3.0V

VCC = 5.0V

ON-RESISTANCE

vs. V

COM

TEMPERATURE

V

COM

(V)

R

ON

(Ω)

MAX4947/48 toc02

0 0.5 1.0 1.5 2.0 2.5 3.0

0

1

2

3

4

5

6

7

TA = +85°C

TA = +25°C

TA = -40°C

VCC = 3V

ON-RESISTANCE

vs. V

COM

AND TEMPERATURE

V

COM

(V)

R

ON

(Ω)

MAX4947/48 toc03

012345

0

1

2

3

4

5

TA = +85°C

TA = +25°C

TA = -40°C

VCC = 5V

NO/NC OFF-LEAKAGE CURRENT

vs. TEMPERATURE

MAX4947/48 toc04

TEMPERATURE (°C)

NO/NC OFF-LEAKAGE CURRENT (nA)

603510-15

0.001

0.01

0.1

1

10

0.0001

-40 85

VCC = 3V

VCC = 3V/5V

V

CC

= 5V

COM ON-LEAKAGE CURRENT

vs. TEMPERATURE

MAX4947/48 toc05

TEMPERATURE (°C)

COM ON-LEAKAGE CURRENT (nA)

603510-15

0.001

0.01

0.1

1

10

0.0001

-40 85

VCC = 3V

VCC = 3V/5V

VCC = 5V

COM OFF-LEAKAGE CURRENT

vs. TEMPERATURE (MAX4748)

MAX4947/48 toc06

TEMPERATURE (°C)

COM OFF-LEAKAGE CURRENT (nA)

603510-15

0.001

0.01

0.1

1

10

0.0001

-40 85

VCC = 3V

VCC = 3V/5V

VCC = 5V

Note 2: The algebraic convention is used. The most negative value is shown in the minimum column. Note 3: UCSP parts are 100% tested at T

A

= +25°C. Limits across the full temperature range are guaranteed by correlation and

design. TQFN parts are guaranteed by correlation and design at - 40°C.

Note 4: R

ON

and ΔR

ON

matching specifications are guaranteed by design.

Note 5: ΔR

ON

= R

ON(MAX)

- R

ON(MIN)

.

Note 6: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the

specified analog signal ranges.

Note 7: Guaranteed by design, not production tested.

Note 8: Off-Isolation = 20log

10[VCOM_

/ (V

NO_

or V

NC_

)], V

COM_

= output, V

NO_

or V

NC_

= input to off switch.

Note 9: Between any two switches.

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3V, TA= +25°C.) (Notes 2, 3)