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________________________________________________________________ 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.
MAX4888B/MAX4888C
Up to 8.0Gbps Dual Passive Switches
19-5706; Rev 0; 12/10
Typical Operating Circuit
General Description
The MAX4888B/MAX4888C dual double-pole/doublethrow
(2 x DPDT), high-speed passive switches are
ideal for switching two half-lanes of PCI ExpressM (PCIe)
data between two possible destinations. These devices
feature a dual digital control input to switch signal paths.
The MAX4888C is intended for use in systems where
both the input and output are capacitively coupled (e.g.,
SAS, SATA, XAUI, and PCIe) and provides a 10FA (typ)
source current and a 60kI (typ) internal biasing resistor
to GND at the AOUT_ and BOUT_ pins.
The devices are fully specified to operate from a single
+3.3V (typ) power supply. Both devices are available
in an industry-standard 3.5mm x 5.5mm, 28-pin TQFN
package. They operate over the -40NC to +85NC extended
temperature range.
Applications
Desktop PCs
Notebook PCs
Servers
Features
S Single +3.3V Power-Supply Voltage
S Supports PCIe Gen I, Gen II, and Gen III Data
Rates
S Supports Up To and Including 6.0Gbps SAS/SATA
Signals
S Supports Other High-Speed Interfaces (e.g., XAUI)
S Superior Bandwidth Return Loss
S Small, 3.5mm x 5.5mm, 28-Pin TQFN Package
Ordering Information
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
PCI Express is a registered trademark of PCI-SIG Corp.
MAX4888C
VCC
GND
CONNECTION SELECT
AOUTA+
MAX4888C
VCC
GND
AOUTABOUTA+
SEL
SELB
SEL
SELB
PCIe HOST
BOUTAAIN+
AINBIN+
BINAIN+
AINBIN+
AOUTB+ BINAOUTBBOUTB+
SAS HOST
NOTE: CAPACITIVE COUPLING WAS OMITTED TO SIMPLIFY ILLUSTRATION.
PCIe DEVICE
SAS DEVICE
BOUTBAOUTA+
AOUTABOUTA+
BOUTAAOUTB+
AOUTBBOUTB+
BOUTBPART
TEMP RANGE PIN-PACKAGE
MAX4888BETI+ -40NC to +85NC 28 TQFN-EP*
MAX4888CETI+ -40NC to +85NC 28 TQFN-EP*
