Rainbow-electronics MAX4889C Instrukcja Użytkownika Pobierz pdf

General Description

The MAX4889B/MAX4889C high-speed passive switch-

es route PCI Express

(PCIe) data between two possi-

ble destinations in desktop or notebook PCs. The

MAX4889B/MAX4889C are quad double-pole/double-

throw (4 x DPDT) switches ideal for switching four half

lanes of PCIe data between two destinations. The

MAX4889B/MAX4889C feature a single digital control

input (SEL) to switch signal paths.

The MAX4889C is intended for use in systems (e.g.,

SAS) where both the input and output are capacitively

coupled, and provides a 10µA (typ) source current and

a 60kΩ (typ) internal biasing resistor to GND at the

_OUT_ terminals.

The MAX4889B/MAX4889C are fully specified to oper-

ate from a single +3.3V (typ) power supply. Both

devices are available in an industry-standard 3.5mm x

9.0mm, 42-pin TQFN package. These devices operate

over the -40°C to +85°C extended temperature range.

Applications

Desktop PCs

Notebook PCs

Servers

Video Graphics Cards—SLI™

(Scaled Link Interface) and CrossFire™

Features

o Single +3.3V Power-Supply Voltage

o Support PCIe Gen I, Gen II Data Rates

o Supports SAS I, SAS II, and SAS 6.0Gbps

(MAX4889C)

o Superior Return Loss

Better than -14dB at 2.8GHz

o Small 3.5mm x 9.0mm, 42-Pin TQFN Package

o Industry-Standard Pinouts

MAX4889B/MAX4889C

2.5/5.0Gbps PCIe Passive Switches

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-4148; Rev 1; 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.

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

range.

Denotes a lead-free package.

EP = Exposed pad.

PART PIN-PACKAGE PKG CODE

MAX4889BETO+ 42 TQFN-EP* T423590M-1

MAX4889CETO+ 42 TQFN-EP* T423590M-1

Pin Configuration

TOP VIEW

MAX4889B/

MAX4889C

TQFN

GND

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22

COUTB+

COUTB-

DIN+

DIN-

DOUTB+

DOUTB-

CIN-

CIN+

BOUTB-

BOUTB+

BIN-

BIN+

AOUTB-

AOUTB+

AIN-

AIN+

COUTA-

GND

DOUTA+

DOUTA-

GND

COUTA+

GND

SEL

BOUTA-

BOUTA+

GND

AOUTA-

AOUTA+

GND

*CONNECT EXPOSED PAD TO GROUND.

*EP

PCI Express is a registered trademark of PCI-SIG Corp.

SLI is a trademark of NVIDIA Corp.

CrossFire is a trademark of ATI Technologies, Inc.

Typical Operating Circuit appears at end of data sheet.

1 2 3 4 5 6 ... 10 11

MAX4889B/MAX4889C 1

Podsumowanie treści

Strona 1 - MAX4889B/MAX4889C

General DescriptionThe MAX4889B/MAX4889C high-speed passive switch-es route PCI Express®(PCIe) data between two possi-ble destinations in desktop or n

Strona 2

MAX4889B/MAX4889C2.5/5.0Gbps PCIe Passive Switches10 ______________________________________________________________________________________AIN+AIN-BIN

Strona 3

MAX4889B/MAX4889C2.5/5.0Gbps PCIe Passive SwitchesMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied i

Strona 4

MAX4889B/MAX4889C2.5/5.0Gbps PCIe Passive Switches2 _______________________________________________________________________________________ABSOLUTE MA

Strona 5

FREQUENCY RANGE(GHz)MAXIMUM INSERTIONLOSS (dB)0–2.52.5–55 or greaterMAX4889B/MAX4889C2.5/5.0Gbps PCIe Passive Switches________________________________

Strona 6

MAX4889B/MAX4889C2.5/5.0Gbps PCIe Passive Switches4 _______________________________________________________________________________________Test Circui

Strona 7

MAX4889B/MAX4889C2.5/5.0Gbps PCIe Passive SwitchesTest Circuits/Timing Diagrams (continued)LOADSOURCEVOUTpZLVOUTnZLMAX4889B/MAX4889CSELCALIBRATIONTRAC

Strona 8

MAX4889B/MAX4889C2.5/5.0Gbps PCIe Passive Switches6 _______________________________________________________________________________________Typical Ope

Strona 9

MAX4889B/MAX4889C2.5/5.0Gbps PCIe Passive Switches_______________________________________________________________________________________ 7GNDVCCVCCAI

Strona 10

MAX4889B/MAX4889C2.5/5.0Gbps PCIe Passive Switches8 _______________________________________________________________________________________Pin Descrip

Strona 11

Detailed DescriptionThe MAX4889B high-speed passive switch routes PCIExpress (PCIe) data or other high-speed signals withamplitude of ≤ 1.2VP-Pdiffere

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