MAX4888ETI+ Maxim Integrated Products, MAX4888ETI+ Datasheet - Page 9

• Manufacturer Part Number: MAX4888ETI+
• Description: IC SWITCH QUAD SPDT 28TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX4888ETI+

• Function: Switch
• Circuit: 4 x SPDT
• On-state Resistance: 7 Ohm
• Voltage Supply Source: Single Supply
• Voltage - Supply, Single/dual (±): 1.65 V ~ 3.6 V
• Current - Supply: 60µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX4888A/MAX4889A high-speed passive switch-
es route PCIe data between two possible destinations.
The MAX4888A/MAX4889A are ideal for routing PCIe sig-
nals to change the system configuration. For example, in
a graphics application, the MAX4888A/MAX4889A create
Figure 3. On-Loss, Off-Isolation, and Crosstalk
Figure 4. Channel Off-/On-Capacitance
CAPACITANCE
METER
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" NO_ OR NC_ TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN COM_ AND "ON" NO_ OR NC_ TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED BETWEEN ANY TWO PAIRS.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
50Ω
0V OR V+
_______________________________________________________________________________________
SEL
NC_
0.1μF
5.0Gbps PCI Express Passive Switches
MAX4888A/MAX4889A
Detailed Description
COM_
NC_ or
NO_
+3.3V
GND
V+
+3.3V
GND
V+
MAX4888A/MAX4889A
0.1μF
COM_
NO_
SEL
V
V
IN
OUT
V
Test Circuits/Timing Diagrams (continued)
IL
OR V
IH
MEAS
50Ω
two sets of eight lanes from a single 16-lane bus. The
MAX4888A/MAX4889A feature a single digital control
input (SEL) to switch signal paths.
The MAX4888A/MAX4889A are fully specified to oper-
ate from a single +3.0V to +3.6V power supply
The MAX4888A/MAX4889A provide a single digital con-
trol input (SEL) to select the signal path between the
COM__ and NO__/NC__ channels. The truth tables for
the MAX4888A/MAX4889A are depicted in the
Functional Diagrams/Truth Table section. Drive SEL rail-
to-rail to minimize power consumption.
The MAX4888A/MAX4889A accept standard PCIe sig-
nals to a maximum of V+ - 1.2V. Signals on the COM_+
channels are routed to either the NO_+ or NC_+ chan-
nels, and signals on the COM_- channels are routed to
either the NO_- or NC_- channels. The MAX4888A/
MAX4889A are bidirectional switches, allowing COM__,
NO__, and NC__ to be used as either inputs or outputs.
50Ω
††
Contact factory if operating at +2.5V or +1.8V.
ANALYZER
NETWORK
50Ω
50Ω
REF
Digital Control Input (SEL)
Analog Signal Levels
OFF-ISOLATION = 20log
CROSSTALK = 20log
ON-LOSS = 20log
V
V
V
V
V
V
OUT
OUT
OUT
IN
IN
IN
††
.
9