MAX3671ETN+

MAX3671ETN+ Datasheet

MAX3671

Part	Datasheet
MAX3671ETN+	MAX3671ETN+ (pdf)

Related Parts	Information
MAX3671ETN+T	MAX3671ETN+T

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MAX3671 Low-Jitter Frequency Synthesizer with Selectable Input Reference The MAX3671 is a low-jitter frequency synthesizer that accepts two reference clock inputs and generates nine phase-aligned outputs. The device features 40kHz jitter transfer bandwidth, 0.3psRMS 12kHz to 20MHz integrated phase jitter, and best-in-class power-supply noise rejection PSNR , making it ideal for jitter cleanup, frequency translation, and clock distribution in Gigabit Ethernet applications. The MAX3671 operates from a single +3.3V supply and typically consumes 400mW. The IC is available in an 8mm x 8mm, 56-pin TQFN package, and operates from -40°C to +85°C. Gigabit Ethernet Routers and Switches Frequency Translation Jitter Cleanup Clock Distribution Pin Configuration and Typical Application Circuits appear at end of data sheet. Two Reference Clock Inputs LVPECL Nine Phase-Aligned Clock Outputs LVPECL Input Frequencies 62.5MHz,125MHz, 250MHz, 312.5MHz Output Frequencies 62.5MHz, 125MHz, 156.25MHz, 250MHz, 312.5MHz Low-Jitter Generation 0.3psRMS 12kHz to 20MHz Clock Failure Indicator for Both Reference Clocks External Feedback Provides Zero-Delay Capability Low Output Skew 20ps Typical Ordering Information PART TEMP RANGE PIN-PACKAGE MAX3671ETN+ -40°C to +85°C 56 TQFN-EP* +Denotes a lead Pb -free/RoHS-compliant package. *EP = Exposed pad. Functional Diagram REFCLK0 REFCLK1 IN0FAIL IN1FAIL LOCK SEL_CLK CPLL 0.1uF DIV M 62.5MHz CREG 0.22uF 2.5GHz PLL_BYPASS OUTA_EN DIV A SIGNAL QUALIFIER AND LOCK DETECT POWER-ON RESET POR DIV N DIV B MAX3671 OUTA3 OUTA2 OUTA1 OUTA0 OUTB_EN OUTB4 OUTB3 OUTB2 OUTB1 OUTB0 FB_SEL FB_IN 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 MAX3671 Low-Jitter Frequency Synthesizer with Selectable Input Reference ABSOLUTE MAXIMUM RATINGS Supply Voltage Range VCC, VCC_VCO ..............-0.3V to +4.0V LVPECL Output Current OUTA[3:0], OUTA[3 0], OUTB[4:0], OUTB[4 0] .............................-56mA All Other to VCC + 0.3V Continuous Power Dissipation TA = +70°C 56-Pin TQFN derate 47.6mW/°C above 70°C ..........3808mW Operating Junction Temperature TJ ................-55°C to +150°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature soldering, 10s .................................+300°C 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. ELECTRICAL CHARACTERISTICS VCC = +3.0V to +3.6V, TA = -40°C to +85°C, CPLL = 0.1µF, CREG = 0.22µF. Typical values are at VCC = +3.3V, TA = +25°C, unless otherwise noted. PARAMETER CONDITIONS Supply Current POWER-ON RESET LVPECL outputs unterminated VCC Rising Note 1 VCC Falling Note 1 LVCMOS/LVTTL INPUTS MR, SEL_CLK, PLL_BYPASS, FB_SEL Input High Voltage Input Low Voltage Input High Current VIN = VCC Input Low Current VIN = GND LVCMOS/LVTTL OUTPUTS IN0FAIL, IN1FAIL, LOCK Output High Voltage IOH = -8mA Output Low Voltage IOL = +8mA LVPECL INPUTS REFCLK0, REFCLK0, REFCLK1, REFCLK1, FB_IN, FB_IN Note 2 Input High Voltage MIN TYP MAX UNITS 120 175 Input Low Voltage VCC - Input Bias Voltage Differential-Input Swing Differential-Input Impedance Common-Mode Input Impedance Input Capacitance Input Current Input Inrush Current When Power is Off Steady State VCMI IDC VIH = VCC - 0.7V, VIL = VCC - 2.0V Notes 3, 4 -100

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MAX3671

Low-Jitter Frequency Synthesizer with Selectable Input Reference

The MAX3671 is a low-jitter frequency synthesizer that accepts two reference clock inputs and generates nine phase-aligned outputs. The device features 40kHz jitter transfer bandwidth, 0.3psRMS 12kHz to 20MHz integrated phase jitter, and best-in-class power-supply noise rejection PSNR , making it ideal for jitter cleanup, frequency translation, and clock distribution in Gigabit Ethernet applications.

The MAX3671 operates from a single +3.3V supply and typically consumes 400mW. The IC is available in an 8mm x 8mm, 56-pin TQFN package, and operates from -40°C to +85°C.

Gigabit Ethernet Routers and Switches

Frequency Translation

Jitter Cleanup

Clock Distribution

Pin Configuration and Typical Application Circuits appear at end of data sheet.

Two Reference Clock Inputs LVPECL Nine Phase-Aligned Clock Outputs LVPECL Input Frequencies 62.5MHz,125MHz, 250MHz,
312.5MHz

Output Frequencies 62.5MHz, 125MHz, 156.25MHz, 250MHz, 312.5MHz

Low-Jitter Generation 0.3psRMS 12kHz to 20MHz Clock Failure Indicator for Both Reference Clocks External Feedback Provides Zero-Delay Capability Low Output Skew 20ps Typical
Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

MAX3671ETN+
-40°C to +85°C
56 TQFN-EP*
+Denotes a lead Pb -free/RoHS-compliant package. *EP = Exposed pad.

Functional Diagram

REFCLK0 REFCLK1

IN0FAIL IN1FAIL

LOCK

SEL_CLK

CPLL 0.1uF

DIV M
62.5MHz

CREG 0.22uF
2.5GHz

PLL_BYPASS OUTA_EN

DIV A

SIGNAL QUALIFIER AND

LOCK DETECT

POWER-ON RESET POR

DIV N

DIV B

MAX3671

OUTA3 OUTA2 OUTA1 OUTA0 OUTB_EN

OUTB4 OUTB3 OUTB2 OUTB1

OUTB0

FB_SEL FB_IN

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

MAX3671

Low-Jitter Frequency Synthesizer with Selectable Input Reference

ABSOLUTE MAXIMUM RATINGS

Supply Voltage Range VCC, VCC_VCO ..............-0.3V to +4.0V LVPECL Output Current OUTA[3:0],

OUTA[3 0], OUTB[4:0], OUTB[4 0] .............................-56mA All Other to VCC + 0.3V

Continuous Power Dissipation TA = +70°C 56-Pin TQFN derate 47.6mW/°C above 70°C ..........3808mW

Operating Junction Temperature TJ ................-55°C to +150°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature soldering, 10s .................................+300°C

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.

ELECTRICAL CHARACTERISTICS

VCC = +3.0V to +3.6V, TA = -40°C to +85°C, CPLL = 0.1µF, CREG = 0.22µF. Typical values are at VCC = +3.3V, TA = +25°C, unless otherwise noted.

PARAMETER

CONDITIONS

Supply Current POWER-ON RESET

LVPECL outputs unterminated

VCC Rising

Note 1

VCC Falling

Note 1

LVCMOS/LVTTL INPUTS MR, SEL_CLK, PLL_BYPASS, FB_SEL

Input High Voltage

Input Low Voltage Input High Current

VIN = VCC

Input Low Current

VIN = GND

LVCMOS/LVTTL OUTPUTS IN0FAIL, IN1FAIL, LOCK

Output High Voltage

IOH = -8mA

Output Low Voltage

IOL = +8mA

LVPECL INPUTS REFCLK0, REFCLK0, REFCLK1, REFCLK1, FB_IN, FB_IN Note 2

Input High Voltage

MIN TYP MAX UNITS
120 175

Input Low Voltage

VCC -

Input Bias Voltage

Differential-Input Swing Differential-Input Impedance Common-Mode Input Impedance Input Capacitance Input Current Input Inrush Current When Power is Off Steady State

VCMI IDC

VIH = VCC - 0.7V, VIL = VCC - 2.0V Notes 3, 4
-100

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Datasheet ID: MAX3671ETN+ 647316