MAX4888B Datasheet, PDF (1/10 Pages) Maxim Integrated Products – Superior Bandwidth Return Loss

19-5706; Rev 0; 12/10
EVAALVUAAILTAIOBNLEKIT
Up to 8.0Gbps Dual Passive Switches
General Description
The MAX4888B/MAX4888C dual double-pole/double-
throw (2 x DPDT), high-speed passive switches are
ideal for switching two half-lanes of PCI Express^M (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 extend-
ed temperature range.
Desktop PCs
Notebook PCs
Servers
Applications
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
PART
TEMP RANGE PIN-PACKAGE
MAX4888BETI+ -40NC to +85NC 28 TQFN-EP*
MAX4888CETI+ -40NC to +85NC 28 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Typical Operating Circuit
CONNECTION SELECT
VCC
VCC
PCIe HOST
SAS HOST
AOUTA+
SEL
AOUTA-
BOUTA+
SELB
BOUTA-
AIN+
MAX4888C ^AIN-
BIN+
AOUTB+
BIN-
AOUTB-
BOUTB+
BOUTB-
GND
SEL
AOUTA+
AOUTA-
SELB
BOUTA+
BOUTA-
AIN+
AIN- _MAX4888C
BIN+
BIN-
AOUTB+
AOUTB-
BOUTB+
BOUTB-
GND
PCIe DEVICE
SAS DEVICE
NOTE: CAPACITIVE COUPLING WAS OMITTED TO SIMPLIFY ILLUSTRATION.
PCI Express is a registered trademark of PCI-SIG Corp.
________________________________________________________________ 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.