MAX4889AETO+ Datasheet MAX4888AETI+, MAX4888ETI+, MAX4888AETI+T | P1-P3

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

MAX4888A

TOP VIEW

TQFN

V+

GND

*EP

V+

GND

V+

GND

V+

GND

12345678910

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

V+

GND

V+

GND

V+

GND

V+

GND

1234567891011121314151617

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.

MAX4888A/MAX4889A

5.0Gbps PCI Express Passive Switches

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V+ = +3.0V to +3.6V, T

= -40°C to +85°C, unless otherwise noted. Typical values are at V+ = +3.3V, T

= +25°C.) (Note 2)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

(All voltages referenced to GND, unless otherwise noted.)

V+ .............................................................................-0.3V to +4V

SEL, COM__, NO__, NC__ (Note 1) .............-0.3V to (V+ + 0.3V)

| COM__ - NO__ |, | COM__ - NC__ | (Note 1).................0 to +2V

Continuous Current (COM_ to NO__/NC__) .....................±70mA

Peak Current (COM__ to NO__/NC__)

(pulsed at 1ms, 10% duty cycle)..................................±70mA

Continuous Current (SEL).................................................±30mA

Peak Current (SEL)

(pulsed at 1ms, 10% duty cycle)................................±150mA

Continuous Power Dissipation (T

= +70°C)

28-Pin TQFN (derate 20.8mW/°C above +70°C) ....1666.7mW

42-Pin TQFN (derate 35.7mW/°C above +70°C) ....2857.1mW

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Junction Temperature......................................................+150°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

ANALOG SWITCH

Analog-Signal Range

COM_

NO_,

NC_

(V+ - 1.2) V

Voltage Between COM and

NO/NC

| V

COM_

NO_

| ,

| V

COM_

NC_

0 1.8 V

On-Resistance R

V+ = +3.0V, I

COM_

= 15mA,

NO_

or V

NC_

= 0V, +1.8V

7 

On-Resistance Match Between

Pairs of Same Channel

V+ = +3.0V, I

COM_

= 15mA,

NO_

or V

NC_

= 0V (Notes 3, 4)

0.1 1 

On-Resistance Match

Between Channels

V+ = +3.0V, I

COM_

= 15mA,

NO_

or V

NC_

= 0V (Notes 3, 4)

0.6 2 

On-Resistance Flatness R

FLAT(ON)

V+ = +3.0V, I

COM_

= 15mA

NO_

or V

NC_

= 0V, +1.8V (Notes 4, 5)

0.06 2 

NO_ or NC_ Off-Leakage

Current

NO_(OFF)

NC_(OFF)

V+ = +3.6V, V

COM_

= 0V, +1.8V,

NO_

or V

NC_

= +1.8V, 0V

-1 +1 μA

COM_ On-Leakage

Current

COM_(ON)

V+ = +3.6V, V

COM_

= 0V, +1.8V,

NO_

or V

NC_

= V

COM_

or unconnected

-1 +1 μA

Note 1: Signals on SEL, NO__, NC__ or COM__ exceeding V+ or GND are clamped by internal diodes. Limit forward-diode current

to maximum current rating.

MAX4888A/MAX4889A

5.0Gbps PCI Express Passive Switches

_______________________________________________________________________________________ 3

Note 2: All units are 100% production tested at T

= +85°C. Limits over the operating temperature range are guaranteed by design

and characterization and are not production tested.

Note 3: ΔR

= R

ON(MAX)

- R

ON(MIN)

Note 4: Guaranteed by design. Not production tested.

Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the

specified analog signal range.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DYNAMIC

Turn-On Time t

NO_

or V

NC_

= +1.0V, R

= 50, Figure 1 90 250 ns

Turn-Off Time t

OFF

NO_

or V

NC_

= +1.0V, R

= 50, Figure 1 10 50 ns

Propagation Dela y t

= R

= 50, unbalanced, Figure 2 50 ps

Output Skew Between Pairs t

SK1

= R

= 50, unbalanced; skew between

any two pairs, Figure 2

50 ps

Output Skew Between Same

Pair

SK2

= R

= 50, unbalanced; skew between

two lines on same pair, Figure 2

10 ps

1MHz < f < 100MHz -0.5

On-Loss G

LOS

= R

= 50,

unbalanced,

Figure 3

500MHz < f < 1.25GHz -1.4

f = 50MHz -53

Crosstalk V

CT1

Crosstalk between

any two pairs,

= R

= 50,

unbalanced,

Figure 3

f = 1.25GHz -32

Signaling Data Rate BR R

= R

= 50 5.0 Gbps

f = 10MHz -56

Off-Isolation V

ISO

Signal = 0dBm,

= R

= 50,

Figure 3

f = 1.25GHz -26

NO_/NC_ Off-Capacitance

NO_/NC_(OFF) Figure 4 1 pF

COM_ On-Capacitance C

COM_(ON)

Figure 4 2 pF

LOGIC IN PUT

Input-Logic Low V

0.5 V

Input-Logic High V

1.4 V

Input-Logic Hysteresis V

HYST

100 mV

Input Leakage Current I

SEL

= 0V or V+ -1 +1 μA

POWER SUPPLY

Power-Supply Range V+ 1.65 3.60 V

MAX4888A 60

V+ Supply Current I+ V

SEL

= 0V or V+

MAX4889A 120

μA

Input Leakage Current I

SEL

= 0V or V+ -1 +1 μA

ESD PROTECTION

COM_+, COM_- Human Body Model ±6 kV

ELECTRICAL CHARACTERISTICS (continued)

(V+ = +3.0V to +3.6V, T

= -40°C to +85°C, unless otherwise noted. Typical values are at V+ = +3.3V, T

= +25°C.) (Note 2)

P1-P3 P4-P6 P7-P9 P10-P12 P13-P14

MAX4889AETO+

Mfr. #:

Buy MAX4889AETO+

Manufacturer:

Maxim Integrated

Description:

Multiplexer Switch ICs 5.0Gbps PCI Express Passive Switch

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MAX4889AETO+

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