Maxim manual 0Gbps PCI Express Passive Switches, MAX4888A/MAX4889A

19-0770; Rev 0; 4/07

5.0Gbps PCI Express Passive Switches

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 and also operate down to +1.65V. 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

PCI Express is a registered trademark of PCI-Sig Corp.

Features

♦Single 1.65V 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

Ordering Information/

Selector Guide

PART	PIN-	CONFIGURATION	PKG
	PACKAGE		CODE
MAX4888AETI+ 28 TQFN-EP*		Two	T283555-1
		Half Lanes
MAX4889AETO+ 42 TQFN-EP*		Four Half	T423590M-1
		Lanes

Note: All devices are specified over the -40°C to +85°C operat- ing temperature range.

+Denotes lead-free package. *EP = Exposed paddle.

Typical Application Circuit appears at end of data sheet.

MAX4888A/MAX4889A

Pin Configurations

TOP VIEW

	NC1+	NC1-	NC2+	NC2-	GND	V+	NO1+	NO1-	NO2+	NO2-
	24	23	22	21	20	19	18	17	16	15
GND	25									14	GND
V+	26									13	V+
GND	27			MAX4888A						12	GND
V+	28	*EP								11	V+
	+
	1	2	3	4	5	6	7	8	9	10
	GND	SEL	N.C.	COM1+	COM1-	COM2+	COM2-	V+	N.C.	GND
					TQFN

	NC1+	NC1-	NC2+	NC2-	NO1+	NO1-	NO2+	NO2-	V+	NC3+	NC3-	NC4+	NC4-	NO3+	NO3-	NO4+	NO4-
	38	37	36	35	34	33	32	31	30	29	28	27	26	25	24	23	22
GND	39																21	GND
V+	40																20	V+
GND	41							MAX4889A									19	GND
V+	42	*EP															18	V+
	+
	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17
	GND	COM1+	COM1-	GND	V+	COM2+	COM2-	V+	SEL	GND	COM3+	COM3-	V+	GND	COM4+	COM4-	GND
								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.