MAX4889B Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Industry-Standard Pinouts

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
V_CC 39
GND 40
V_CC 41
GND 42 ^*EP
+
MAX4889B
MAX4889C
21 V_CC
20 GND
19 V_CC
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.