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PDF MAX4889B Data sheet ( Hoja de datos )
| Número de pieza | MAX4889B | |
| Descripción | 2.5/5.0/8.0Gbps PCIe Passive Switches | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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19-4148; Rev 2; 8/10
EVAALVUAAILTAIOBNLEKIT
2.5/5.0/8.0Gbps PCIe Passive Switches
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
♦ Single +3.3V Power-Supply Voltage
♦ Support PCIe Gen I, Gen II, and Gen III Data Rates
♦ Supports SAS I, SAS II, and SAS 6.0Gbps
(MAX4889C)
♦ Superior Return Loss
Better than -10dB (typ) at 5.0GHz
♦ Small 3.5mm x 9.0mm, 42-Pin TQFN Package
♦ Industry-Standard Pinouts
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX4889BETO+
-40°C to +85°C
42 TQFN-EP*
MAX4889CETO+
-40°C to +85°C
42 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
PCI Express is a registered service mark of PCI-SIG Corporation.
SLI is a registered trademark of NVIDIA Corporation.
CrossFire is a trademark of ATI Technologies, Inc.
Typical Operating Circuit appears at end of data sheet.
Pin Configuration
TOP VIEW
38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22
VCC 39
GND 40
VCC 41
GND 42 *EP
+
MAX4889B
MAX4889C
21 VCC
20 GND
19 VCC
18 GND
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
*CONNECT EXPOSED PAD TO GROUND.
TQFN
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
2.5/5.0/8.0Gbps PCIe Passive Switches
Test Circuits/Timing Diagrams (continued)
SOURCE
ZS
VS+ Σ
ZS
VS- Σ
MAX4889B/
MAX4889C
SEL
ZS
VSC+ Σ
ZS
VSC- Σ
CALIBRATION
TRACES
LOAD
VOUTp
VOUTn
ZL
ZL
VCALp
VCALn
ZL
ZL
VCALp - VCALn
50%
50%
VOUTp - VOUTn
50%
tPDr
tPDf
50%
tPD = max (tPDr, tPDf)
VOUTp
VCM
VCM
VOUTn
VCM
tSK1
VCM
tSK2
tSKEW = max (tSK1, tSK2)
THE FREQUENCY OF THE SIGNALS SHOULD BE APPROXIMATELY 1/20 OF THE LOWEST DATA RATE.
Figure 2. Propagation Delay and Output Skew
_______________________________________________________________________________________ 5
5 Page 
2.5/5.0/8.0Gbps PCIe Passive Switches
PROCESS: CMOS
Chip Information
Package Information
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in
the package code indicates RoHS status only. Package draw-
ings may show a different suffix character, but the drawing per-
tains to the package regardless of RoHS status.
PACKAGE
TYPE
42 TQFN
PACKAGE
CODE
T423590M+1
OUTLINE
LAND
NO. PATTERN NO.
21-0181
90-0079
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAX4889B.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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| MAX4889B | 2.5/5.0/8.0Gbps PCIe Passive Switches | Maxim Integrated |
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