Datasheet

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General Description

The MAX4989 is a bidirectional 2-of-4 USB 2.0 cross-

point switch. The MAX4989 features the low on-capaci-

tance and low on-resistance necessary to switch USB

2.0 low-/full-/Hi-Speed signals at data rates up to

480Mbps. This device allows any 2-of-4 USB pairs to

be connected together and is configured through a

simple 3-input control logic interface.

The MAX4989 operates from a single +2.7V to +5.5V

supply and features an internal charge pump to permit

full rail-to-rail swing. This device also features a high-

impedance shutdown mode to reduce supply current to

100nA (typ).

The MAX4989 is available in a 14-pin, 3mm x 3mm

TDFN package and operates over the extended -40°C

to +85°C temperature range.

Applications

Notebook Computers

Cell Phones

Features

o Single +2.7V to +5.5V Supply Voltage

o Low 1µA (typ) Supply Current

o -3dB Bandwidth: 1GHz (typ)

o Low 5Ω (typ) R

o High-Impedance Shutdown Mode

o Logic Inputs Control Signal Routing

o +1.8V CMOS-Logic Compatible

o Ultra-Small 14-Pin, 3mm x 3mm, TDFN Package

MAX4989

USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch

________________________________________________________________

Maxim Integrated Products

19-4206; Rev 0; 8/08

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.

Ordering Information

PART TEMP RANGE

PIN-

PACKAGE

PKG

CODE

MAX4989ETD+ -40°C to +85°C

14 TDFN-EP*

(3mm x 3mm)

T1433-2

Denotes a lead-free/RoHS-compliant package.

EP = Exposed pad.

Pin Configuration

MAX4989

3mm x 3mm TDFN

TOP VIEW

*EP = EXPOSED PAD. CONNECT EP TO GROUND.

W+

X+

X-

Y+

Z+

Z-

W-Y-

GNDGND

C2C1

114

213

312

411

510

*EP

EVALUATION KIT

AVAILABLE

EVALUATION KIT

AVAILABLE

Summary of content (8 pages)

PAGE 1
KIT ATION EVALU N K IT E L B ILA ATIO EVALUAVABLE AVAILA 19-4206; Rev 0; 8/08 USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch Features The MAX4989 is a bidirectional 2-of-4 USB 2.0 crosspoint switch. The MAX4989 features the low on-capacitance and low on-resistance necessary to switch USB 2.0 low-/full-/Hi-Speed signals at data rates up to 480Mbps. This device allows any 2-of-4 USB pairs to be connected together and is configured through a simple 3-input control logic interface. o Single +2.7V to +5.
PAGE 2
MAX4989 USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch ABSOLUTE MAXIMUM RATINGS Junction-to-Case Thermal Resistance (ΘJC) (Note 1) 14-Pin TDFN ................................................................. 8°C/W Junction-to-Ambient Thermal Resistance (ΘJA) (Note 1) 14-Pin TDFN ............................................................... 41°C/W Operating Temperature Range ......................... -40°C to +85°C Junction Temperature ....................................................
PAGE 3
USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch (VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC (Note 4) Turn-On Time tON VIN = +1.5V, RL = 300Ω, CL = 35pF, VC_ = 0V to VCC, Figure 2 15 100 µs Turn-Off Time tOFF VIN = +1.
PAGE 4
USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch MAX4989 Test Circuits/Timing Diagrams V OFF-ISOLATION = 20log OUT VIN NETWORK ANALYZER 0V OR VCC C_ IN 50Ω VIN 50Ω MAX4989 OFF OUT 50Ω MEAS VOUT ON-LOSS = 20log VOUT VIN CROSSTALK = 20log VOUT VIN REF 50Ω 50Ω IN, OUT, AND OFF DEPEND ON SWITCH CONFIGURATION. MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN IN AND OFF TERMINAL ON EACH SWITCH.
PAGE 5
USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch MAX4989 RS VIN+ OUT+ IN+ VOUT+ tPLH = tPLHX OR tPLHY tPHL = tPHLX OR tPHLY tSK(0) = |tPLHX - tPLHY| OR |tPHLX - tPHLY| tSK(P) = |tPLHX - tPHLX| OR |tPLHY - tPHLY| IN AND OUT DEPEND ON SWITCH CONFIGURATION RL RS VIN- IN- OUT- VOUTRL C_ VIL TO VIH tINFALL tINRISE V+ 90% VIN+ 90% 50% 50% 10% 0V 10% VCC VIN- 50% 50% 0V tOUTRISE tPLHX tOUTFALL tPHLX VCC 90% VOUT+ 90% 50% 50% 10% 0V 10% VCC 50% VOUT- 50% 0V tPHLY tPLHY Figure 3.
PAGE 6
Typical Operating Characteristics (VCC = +3.3V, TA = +25°C, unless otherwise noted.) 5.5 VCC = 2.7V 5.5 TA = +25°C 4.0 VCC = 5.5V 3.5 TA = -40°C 4.5 4.0 3.5 3.0 3.0 2.5 2.5 100 2 4 1 2 SUPPLY CURRENT vs. TEMPERATURE INPUT LOGIC THRESHOLD vs. SUPPLY VOLTAGE 1.4 1.3 800 790 780 VIH 1.0 0.9 VIL 0.8 0.7 0.6 -40 -15 10 35 TEMPERATURE (°C) 60 85 60 85 0 ON-LOSS OFF-ISOLATION -20 -30 -40 -50 CROSSTALK -60 0.5 750 35 FREQUENCY RESPONSE 1.1 760 10 -10 1.
PAGE 7
USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch PIN NAME 1 Y- Inverting Input/Output of Terminal Y FUNCTION 2 Y+ Noninverting Input/Output of Terminal Y 3 GND 4 Z+ Ground Noninverting Input/Output of Terminal Z 5 Z- Inverting Input/Output of Terminal Z 6 C0 Control Input 0 7 C1 Control Input 1 8 C2 Control Input 2 VCC Positive Supply Voltage Input. Bypass VCC to GND with a 0.1µF ceramic capacitor as close as possible to the device.
PAGE 8
MAX4989 USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch Functional Diagram/Truth Table Applications Information VCC +3.3V 0.1μF MAX4989 D+ USB TRANSCEIVER DA Y+ W+ D+ VCC D- Y+ W+ Y- USB PERIPHERAL 1 W- MAX4989 Z+ Z+ X+ Y- USB TRANSCEIVER B D+ D- X+ Z- XC0 C1 C2 GND D+ D- USB PERIPHERAL 2 WGPIO CONTROL Z+ X+ Figure 4.