19-0770; Rev 2; 5/09
5.0Gbps PCI Express Passive Switches
/MX489A
General Description
Features
The MAX4888A/MAX4889A high-speed passive switches
route PCI Express® (PCIe) data between two possible
destinations. The MAX4888A is a quad single-pole/dou-
ble-throw (4 x SPDT) switch ideally suited for switching
two half lanes of PCIe data between two destinations. The
MAX4889A is an octal single-pole/double-throw (8 x
SPDT) switch ideal for switching four half lanes of PCIe
data between four destinations. The MAX4888A/
MAX4889A feature a single digital control input (SEL) to
switch signal paths.
♦ Single +3.0V to +3.6V Power-Supply Voltage
♦ Low Same-Pair Skew of 7ps
♦ Low 120µA (Max) Quiescent Current
♦ Supports PCIe Gen I and Gen || Data Rates
♦ Flow-Through Pin Configuration for Ease of
Layout
♦ Industry-Compatible Pinout
♦ Lead-Free Packaging
The MAX4888A/MAX4889A are fully specified to oper-
††
ate from a single +3.0V to +3.6V power supply . The
MAX4888A is available in a 3.5mm x 5.5mm, 28-pin
TQFN package. The MAX4889A is available in a 3.5mm
x 9.0mm, 42-pin TQFN package. Both devices operate
over the -40°C to +85°C temperature range.
Applications
Desktop Computers
Servers/Storage Area Networks
Laptops
Ordering Information/Selector Guide
PART
MAX4888AETI+
MAX4889AETO+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
28 TQFN-EP*
42 TQFN-EP*
CONFIGURATION
Two Half Lanes
Four Half Lanes
+Denotes lead(Pb)-free/RoHS-compliant package.
*EP = Exposed paddle.
††
Contact factory if operating at +2.5V or +1.8V.
Typical Application Circuit appears at end of data sheet.
PCI Express is a registered trademark of PCI-SIG Corp.
Pin Configurations
TOP VIEW
38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22
24 23 22 21 20 19 18 17 16 15
39
40
21 GND
20 V+
25
26
14 GND
13 V+
GND
V+
GND
V+
MAX4888A
GND 41
V+ 42
MAX4889A
19 GND
18 V+
GND 27
V+ 28
12 GND
11 V+
*EP
*EP
+
+
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17
1
2
3
4
5
6
7
8
9
10
TQFN
TQFN
*CONNECT EXPOSED PADDLE TO GROUND.
________________________________________________________________ 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.