MAX3840ETJ+ Datasheet MAX3840ETJ+, MAX3840ETJ+T | P1-P3

General Description

The MAX3840 is a dual 2

2 asynchronous crosspoint

switch for SDH/SONET DWDM and other high-speed

data switching applications where serial data stream

loop-through and protection channel switching are

required. It is ideal for OC-48 systems with forward

error correction. A high-bandwidth, fully differential sig-

nal path minimizes jitter accumulation, crosstalk, and

signal skew. Each 2

2 crosspoint switch can fan out

and/or multiplex up to 2.7Gbps data and 2.7GHz clock

signals. All inputs and outputs are current mode logic

(CML) compatible and easily adaptable to interface

with an AC-coupled LVPECL signal. When not used,

each CML output stage can be powered down with an

enable control to conserve power. The typical power

consumption is 460mW with all outputs enabled.

The MAX3840 is compatible with the MAX3876

2.5Gbps clock and data recovery (CDR) circuit.

The MAX3840 is available in a 32-pin exposed-pad

QFN package (5mm

5mm footprint) and operates

from a +3.3V supply over a temperature range of -40°C

to +85°C.

________________________Applications

SDH/SONET and DWDM Transport Systems

Add-Drop Multiplexers

ATM Switch Cores

WDM Cross-Connects

High-Speed Backplanes

Features

♦ Single +3.3V Supply

♦ 460mW Power Consumption

♦ 2ps

RMS

Random Jitter

♦ 7ps

P-P

Deterministic Jitter

♦ Power-Down Feature for Deselected Outputs

♦ CML Inputs/Outputs

♦ 6ps Channel-to-Channel Skew

♦ 100ps Output Edge Speed

♦ 5mm

5mm 32 QFN or Thin QFN Package

MAX3840

+3.3V, 2.7Gbps Dual 2

2 Crosspoint Switch

________________________________________________________________ Maxim Integrated Products 1

MAX3866

TIA AND LA

MAX3876

CDR

MAX3840

CROSSPOINT

SWITCH

= 50Ω TRANSMISSION LINE

DATA

CLOCK

MAX3866

TIA AND LA

MAX3876

CDR

DATA

CLOCK

MAX3869

LASER

DRIVER

LASER

DRIVER

VCC = +3.3V

Typical Application Circuit

19-1854; Rev 5; 9/07

Ordering Information

PART

TEMP RANGE

PIN -

PA C K A G E

PK G

C O D E

MAX3840ETJ+

-40°C to +85°C

32 TQFN T3255-3

MAX3840EGJ

-40°C to +85°C

32 QFN G3255-1

Pin Configurations appear at end of data sheet.

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.

+Denotes a lead-free package.

MAX3840

+3.3V, 2.7Gbps Dual 2

2 Crosspoint Switch

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

= +3.0V to +3.6V, T

= -40°C to +85°C. Typical values are at V

= +3.3V, T

= +25°C, unless otherwise noted.)

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.

Supply Voltage, V

.............................................-0.5V to +5.0V

Input Voltage (CML) .........................(VCC - 1.0) to (V

+ 0.5V)

TTL Control Input Voltage...........................-0.5V to (V

+ 0.5V)

Output Currents (CML) .......................................................22mA

Continuous Power Dissipation (T

= +85°C)

32-Pin TQFN

(derate 21.3mW/°C above +85°C).................................1.38W

32-Pin QFN

(derate 21.3mW/°C above +85°C).................................1.38W

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

Operating Junction Temperature Range...........-55°C to +150°C

Storage Temperature Range .............................-65°C to +160°C

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

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

Supply Current I

All outputs enabled

140 190

CML INPUT AND OUTPUT SPECIFICATIONS

CML Differential Output Swing R

= 50Ω to V

(Figure 2)

640 800 1000

P-P

Differential Output Impedance

85 100 115

CML Output Common-Mode

Voltage

= 50Ω to V

- 0.2 V

CML Single-Ended Input

Voltage Range

- 0.8 V

+ 0.5

CML Differential Input Voltage

Swing

300 2000

P-P

CML Single-Ended Input

Impedance

42.5 50 57.5 Ω

TTL SPECIFICATIONS

TTL Input High Voltage V

2.0

TTL Input Low Voltage V

0.8 V

TTL Input High Current I

-10 +10

µA

TTL Input Low Current I

-10 +10 µA

MAX3840

+3.3V, 2.7Gbps Dual 2

2 Crosspoint Switch

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS

= +3.0V to +3.6V, T

= -40°C to +85°C. Typical values are at V

= +3.3V, T

= +25°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

CML Input and Output Data

Rate

2.7

Gbps

CML Input and Output Clock

Rate

2.7

GHz

CML Output Rise and Fall Time t

, t

20% to 80% 100 136 ps

CML Output Random Jitter RJ (Note 2) 2

RMS

CML Output Deterministic Jitter DJ (Note 3)

720ps

CML Output Differential Skew t

skew1

Any differential pair

725

CML Output Channel-to-

Channel Skew

skew2

Any two outputs

15 40

Propagation Delay from Input-

to-Output

185

CML Differential Output Swing

for 2.7Gbps Input Data

= 50Ω to V

(Note 4)

600 mV

P-P

CML Differential Output Swing

for 2.7GHz Input Clock

= 50Ω to V

(Note 5)

520 mV

P-P

Note 1: AC characteristics are guaranteed by design and characterization.

Note 2: Measured with 100mV

P-P

noise (f ≤ 2MHz) on the power supply.

Note 3: Deterministic jitter (DJ) is the arithmetic sum of pattern-dependent jitter and pulse-width distortion.

Note 4: Measured with 300mV

P-P

differential 1010... data pattern driving the inputs.

Note 5: Measured with 300mV

P-P

differential clock at 2.7GHz driving the inputs.

P1-P3 P4-P6 P7-P8

MAX3840ETJ+

Mfr. #:

Buy MAX3840ETJ+

Manufacturer:

Maxim Integrated

Description:

Analog & Digital Crosspoint ICs 3.3V 2.7Gbps Dual 2X2 Crx Switch

Lifecycle:

New from this manufacturer.

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MAX3840ETJ+

MAX3840ETJ+

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