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General Description

The MAX4906/MAX4906F/MAX4907/MAX4907F analog

switches combine the low on-capacitance (C

) and

low on-resistance (R

) necessary for high-perfor-

mance switching applications. These devices are

designed for USB 2.0 high-speed applications at

480Mbps. These switches will also handle all the

requirements for USB low- and full-speed signaling.

The MAX4906/MAX4906F feature two single-pole/dou-

ble-throw (SPDT) switches, and the MAX4907/

MAX4907F feature two single-pole/single-throw switches

(SPST). The MAX4907/MAX4907F have a low 7Ω (max)

on-resistance and 7pF (max) on-capacitance. These

devices are fully specified to operate from a single

+3.0V to +3.6V power supply and are protected against

a +5.5V short to COM1 and COM2. This feature makes

them fully compliant with the USB 2.0 specification of

+5.5V fault protection. These devices feature a low

threshold voltage and a +1.4V V

, permitting them to

be used with low-voltage logic. The MAX4906/

MAX4906F/MAX4907/MAX4907F operate at 300µA

(max) quiescent current and feature a shutdown input

to reduce the quiescent current to less than 2µA (max).

The MAX4906/MAX4906F/MAX4907/MAX4907F are avail-

able in space-saving, 2mm x 2mm µDFN packages and

operate over a -40°C to +85°C temperature range.

Applications

Features

♦ Fully Specified for a Single +3.0V to +3.6V

Power-Supply Voltage

♦ Low 4Ω (typ), 7Ω (max) On-Resistance (R

)

♦ MAX4907/MAX4907F Ultra-Low 4pF (typ),

7pF (max) On-Capacitance (C

)

♦ -3dB Bandwidth: 1GHz (typ)

♦ Low Bit-to-Bit Skew ≤ 100ps

♦ Shutdown Input Reduces Power Consumption

to 2µA (max)

♦ 3.3V, 1.8V, and 1.4V Logic Compatible

♦ COM

Analog Inputs Fault Protected Against

Shorts to USB Supply Rail Up to +5.5V

♦ Space-Saving Packages

8-Pin and 10-Pin, 2mm x 2mm µDFN Packages

MAX4906/MAX4606F/MAX4907/MAX4907F

High-/Full-Speed USB 2.0 Switches

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3797; Rev 2; 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.

Note: All devices operate over the -40°C to +85°C operating

temperature range.

Selector Guide appears at end of data sheet.

PART PIN-PACKAGE PKG CODE

MAX4906ELB 10 µDFN L1022-1

MAX4906FELB 10 µDFN L1022-1

MAX4907ELA 8 µDFN L822-1

MAX4907FELA 8 µDFN L822-1

Cell Phones

PDAs

Digital Still Cameras

GPS

Notebook Computers

Relay Replacements

USB Switching

Ethernet Switching

Video Switching

Bus Switches

T3/E3 Switches for

Redundancy Protection

V+

NC1

NC2

NO1COM1

GND

SHDN/EN

MAX4906

MAX4906F

μDFN

NO2COM2

TOP VIEW

Pin Configurations

EYE DIAGRAM

500ps/div

V+ =3.3V

BIAS = 9mA

f = 240MHz

USB 2.0

HIGH SPEED

TRANSMIT

TEMPLATE

NO1OUT

100mV/div

NO2OUT

Typical Operating Characteristics

Pin Configurations continued at end of data sheet.

Summary of content (14 pages)

PAGE 1
9-3797; Rev 2; 1/07 High-/Full-Speed USB 2.0 Switches The MAX4906/MAX4906F/MAX4907/MAX4907F analog switches combine the low on-capacitance (CON) and low on-resistance (R ON ) necessary for high-performance switching applications. These devices are designed for USB 2.0 high-speed applications at 480Mbps. These switches will also handle all the requirements for USB low- and full-speed signaling.
PAGE 2
MAX4906/MAX4606F/MAX4907/MAX4907F High-/Full-Speed USB 2.0 Switches ABSOLUTE MAXIMUM RATINGS Voltages Referenced to GND V+ .............................................................................-0.3V to +4V IN, SHDN, SHDN/EN (Note 1) ......................-0.3V to (V+ + 0.3V) COM_, NO_, NC_ ..................................................-0.5V to +5.5V Continuous Current (COM_ to NO_/NC_) ......................±120mA Peak Current, (COM_ to NO_/NC_) (pulsed at 1ms 10% duty cycle)....................
PAGE 3
High-/Full-Speed USB 2.0 Switches (V+ = +3V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+ = 3.3V, TA = +25°C.
PAGE 4
ELECTRICAL CHARACTERISTICS (continued) (V+ = +3V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+ = 3.3V, TA = +25°C.) (Note 2) PARAMETER SYMBOL Total Harmonic Distortion Plus Noise CONDITIONS MIN TYP MAX UNITS THD+N VCOM_ = 2VP-P, RL = 600Ω, f = 20Hz to 20kHz 0.03 % Q VGEN = 1.5V, RGEN = 0Ω, CL = 100pF, Figure 6 5 pC Charge Injection SWITCH LOGIC Logic-Input-Voltage Low VIL Logic-Input-Voltage High VIH Input-Logic Hysteresis 0.4 V 1.
PAGE 5
High-/Full-Speed USB 2.0 Switches QUIESCENT SUPPLY CURRENT vs. TEMPERATURE CHARGE INJECTION (pC) 6 4 2 140 V+ = 3.6V 120 100 V+ = 3.0V 80 60 40 150 MAX4906 toc06 8 160 MAX4906 toc05 CL = 100pF V+ = 3.3V QUIESCENT SUPPLY CURRENT (μA) MAX4906 toc04 10 QUIESCENT SUPPLY CURRENT vs. LOGIC LEVEL QUIESCENT SUPPLY CURRENT (μA) CHARGE INJECTION vs. VCOM V+ = 3.3V 140 130 120 110 20 0 1.1 2.2 3.3 -15 10 35 60 0 85 1.1 2.2 TEMPERATURE (°C) LOGIC LEVEL (V) LOGIC THRESHOLD vs.
PAGE 6
Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) OUTPUT SKEW BETWEEN SWITCHES vs. SUPPLY VOLTAGE FREQUENCY RESPONSE MAX4906 toc13 0 MAX4906 toc13 10 -10 ON-LOSS -20 5 -30 ON-LOSS (dB) OUTPUT SKEW (ps) 0 CROSS-TALK -40 -50 -60 -70 -5 OFF-ISOLATION -80 -90 -100 -10 3.0 3.2 1 3.6 3.4 10 100 1000 FREQUENCY (MHz) SUPPLY VOLTAGE (V) TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY MAX4906 toc15 1 V+ = 3.
PAGE 7
High-/Full-Speed USB 2.0 Switches PIN MAX4906/ MAX4907/ MAX4906F MAX4907F NAME FUNCTION 1 8 IN 2 — SHDN/EN 3 2 GND 4 3 COM1 Analog Switch 1—Common Terminal 5 4 COM2 Analog Switch 2—Common Terminal 6 5 NO2 Analog Switch 2—Normally Open Terminal 7 6 NO1 Analog Switch 1—Normally Open Terminal 8 — NC2 Analog Switch 2—Normally Closed Terminal 9 — NC1 10 7 V+ — 1 SHDN Digital Control Input. IN controls switch 1 and switch 2. Shutdown and Enable Input.
PAGE 8
MAX4906/MAX4606F/MAX4907/MAX4907F High-/Full-Speed USB 2.0 Switches Test Circuits/Timing Diagrams (continued) 10nF V+ V+ COM_ MAX4906/MAX4906F MAX4907/MAX4907F IN CAPACITANCE METER VIL OR VIH NC_ or NO_ f = 1MHz GND Figure 2. Channel Off/On-Capacitance MAX4906/MAX4906F MAX4907/MAX4907F V+ V+ COM_ NO_ OR NC_ VN_ LOGIC INPUT 50% VIL VOUT RL t OFF CL IN VOUT GND LOGIC INPUT SWITCH OUTPUT CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
PAGE 9
High-/Full-Speed USB 2.
PAGE 10
MAX4906/MAX4606F/MAX4907/MAX4907F High-/Full-Speed USB 2.0 Switches Test Circuits/Timing Diagrams (continued) 5V 2.5V 3V VCOM_ 0V tPF tFPR VPF 3V 2.5V VNO_ 1.5V VNC_ 0V Figure 5. MAX4906F/MAX4907F Fault-Protection Response/Recovery Time V+ MAX4906/MAX4906F MAX4907/MAX4907F ΔVOUT V+ RGEN VOUT COM_ NC_ OR NO_ VOUT IN OFF CL V GEN GND ON OFF IN VIL TO VIH IN OFF ON OFF Q = (ΔV OUT )(C L ) LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE. Figure 6.
PAGE 11
High-/Full-Speed USB 2.0 Switches V+ V+ SHDN/EN SHDN MAX4907/MAX4907F MAX4906/MAX4906F IN IN NO1 COM1 NO1 COM1 COM2 NO2 COM2 NC1 NO2 NC2 GND GND MAX4907/MAX4907F MAX4906/MAX4906F SHDN/EN IN NO1 NO2 NC1 NC2 SHDN IN COM1- NO1 COM2- NO1 OFF 0 0 OFF ON 0 0 0 1 ON OFF 0 1 ON 1 x OFF OFF 1 0 OFF 1 1 ON Digital Control Input Shutdown Mode The MAX4906/MAX4906F/MAX4907/MAX4907F provide a single-digit control logic input, IN.
PAGE 12
MAX4906/MAX4606F/MAX4907/MAX4907F High-/Full-Speed USB 2.0 Switches ASIC I SHARED DATA PINS D+ USB TRANSCEIVER D- MAX4907/ MAX4907F VBUS MAX4906/ MAX4906F NC1 NO1 DATA COM1 D+ NO1 COM1 USB TRANSCEIVER SPI/GPIO DEVICE CLOCK NO2 COM2 NC2 D- COM2 ASIC II NO2 EN TRI-STATE ENABLE D+ USB TRANSCEIVER Figure 9. MAX4907/MAX4907F USB/SPI/GPIO Switch DGND USB CONNECTOR Figure 7.
PAGE 13
High-/Full-Speed USB 2.
PAGE 14
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.) A D XXXX XXXX XXXX b e 6, 8, 10L UDFN.EPS MAX4906/MAX4606F/MAX4907/MAX4907F High-/Full-Speed USB 2.0 Switches N SOLDER MASK COVERAGE E PIN 1 0.