Maxim Integrated MAX4888A - Manual

General Description
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.
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.
Features
♦ 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
Applications
Desktop Computers
Servers/Storage Area Networks
Laptops
MAX4888A/MAX4889A
5.0Gbps PCI Express Passive Switches
________________________________________________________________ Maxim Integrated Products 1
MAX4888A
TOP VIEW
TQFN
11
12
13
14
V+
GND
*EP
V+
GND
28
+
27
26
25
V+
GND
V+
GND
1 2 3 4 5 6 7 8 9 10
24 23 22 21 20 19 18 17 16 15
GND N.C.
V+
COM2- COM2+ COM1- COM1+
N.C. SEL GND
NO2- NO2+ NO1- NO1+ V+ GND NC2- NC2+ NC1- NC1+
MAX4889A
TQFN
18
19
20
21
V+
GND
V+
GND
42
+
41
40
39
V+
GND
V+
GND
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22
COM3-
V+
GND
COM4+ COM4-
GND
COM3+
GND SEL
V+
COM2- COM2+
V+
GND
COM1- COM1+
GND
NC4+ NC4- NO3+ NO3- NO4+ NO4- NC3- NC3+ V+ NO2- NO2+ NO1- NO1+ NC2- NC2+ NC1- NC1+
*CONNECT EXPOSED PADDLE TO GROUND.
*EP
Pin Configurations
19-0770; Rev 2; 5/09
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.
EVALUATION KIT
AVAILABLE
Typical Application Circuit appears at end of data sheet. †† Contact factory if operating at +2.5V or +1.8V.
PCI Express is a registered trademark of PCI-SIG Corp.
PART TEMP RANGE PIN-PACKAGE CONFIGURATION
MAX4888AETI+ -40°C to +85°C 28 TQFN-EP* Two Half Lanes
MAX4889AETO+ -40°C to +85°C 42 TQFN-EP* Four Half Lanes
Ordering Information/Selector Guide
+ Denotes lead(Pb)-free/RoHS-compliant package.
* EP = Exposed paddle.