DS4625P+125/156 - Hytronics

General Description

The DS4625 is a dual-output, low-jitter clock oscillator

capable of producing frequency output pair combina-

tions ranging from 100MHz to 625MHz. The device

combines an AT-cut crystal, an oscillator, and a low-

noise phase-locked loop (PLL) in a 5.0mm x 3.2mm

surface-mount LCCC package. Standard frequency

options are listed in the

Ordering Information/Selector

Guide

table. For custom frequency options, contact the

factory at: Custom.Oscillators@maxim-ic.com.

The DS4625 provides dual, low-voltage, positive emit-

ter-coupled logic (LVPECL) clock output drivers. The

output drivers can be enabled and disabled through

the OE pin, which is an active-high CMOS input that

has an internal pullup resistor. When high, both output

pairs are enabled.

The device operates from a single +3.3V ±10% supply.

The operating temperature range is -40°C to +85°C.

Applications

XGMII Clock Oscillator

InfiniBandTM/SM

SAS/SATA

PCIe®

1GbE/10GbE

Features

♦Standard Clock Output Frequencies: 100MHz,

125MHz, 150MHz, 156.25MHz, and 200MHz

♦Phase Jitter < 0.7ps RMS (typical) from 12kHz to

20MHz

♦LVPECL Output

♦+3.3V ±10% Operating Voltage

♦-40°C to +85°C Temperature Range

♦Excellent Power-Supply Noise Rejection

♦5.0mm x 3.2mm Ceramic LCCC Package

♦Output Enable/Disable

DS4625

3.3V Dual-Output LVPECL Clock Oscillator

________________________________________________________________

Maxim Integrated Products

Ordering Information/Selector Guide

19-4558; Rev 1; 3/10

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(Pb)-free/RoHS-compliant package. The lead finish is JESD97 category e4 (Au over Ni) and is compatible with both

lead-based and lead-free soldering processes.

Standard frequency options. Contact the factory at Custom.Oscillators@maxim-ic.com for custom frequencies.

PART TEMP RANGE

FREQUENCY (OP1:ON1)

(MHz) (fC)*

FREQUENCY (OP2:ON2)

(MHz) (fC)* PIN-PACKAGE TOP

MARK

DS4625P+100/100 -40°C to +85°C 100.000 100.000 10 LCCC 6AA

DS4625P+100/150 -40°C to +85°C 100.000 150.000 10 LCCC 6AC

DS4625P+125/125 -40°C to +85°C 125.000 125.000 10 LCCC 6BB

DS4625P+125/156 -40°C to +85°C 125.000 156.250 10 LCCC 6BD

DS4625P+150/150 -40°C to +85°C 150.000 150.000 10 LCCC 6CC

DS4625P+150/200 -40°C to +85°C 150.000 200.000 10 LCCC 6CE

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

InfiniBand is a trademark and service mark of the InfiniBand Trade Association.

PCIe is a registered trademark of PCI-SIG Corp.

DS4625

3.3V Dual-Output LVPECL Clock Oscillator

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

RECOMMENDED OPERATING CONDITIONS

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 ground unless otherwise noted.)

Voltage Range on Any Pin Relative to Ground......-0.3V to +4.0V

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

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

θJA ...................................................................+90°C/W (Note 1)

Storage Temperature Range ...............................-55°C to +85°C

Lead Temperature (soldering, 10s) .................................+260°C

Soldering Temperature (reflow) .......................................+260°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Operating Voltage Range VCC 2.97 3.3 3.63 V

Input-Voltage High (OE) VIH 0.7 x

VCC V

CC V

Input-Voltage Low (OE) VIL 0 0.3 x

VCC V

ELECTRICAL CHARACTERISTICS

(VCC = +2.97V to +3.63V, TA= -40°C to +85°C, typical values are at VCC = +3.3V and TA= +25°C, unless otherwise noted.) (Notes 2, 3)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

ICC_PU LVPECL, output unloaded 65 90 mA

ICC_PL LVPECL, output loaded 120 140 mA

Operating Current

ICC_OEZ V

OE = VIL 80 115 mA

fOUT1

Output Frequency fOUT2

VOE = VIH f

C MHz

Startup Time tSTART (Note 4) 1.0 ms

Frequency Stability fTOTAL/fCTemperature, aging, load, supply, and

initial tolerance (Note 5) -50 +50 ppm

Frequency Stability Over

Temperature with Initial

Tolerance

fTEMP/fC V

CC = +3.3V -35 +35 ppm

Initial Tolerance fINITIAL/fCVCC = +3.3V, TA= +25°C ±20 ppm

Frequency Change Due to VCC fVCC V

CC = +3.3V ±10%, TA= +25°C -3 +3 ppm/V

Frequency Change Due to Load

Variation fLOAD/fC ±10% variation in termination resistance ±1 ppm

Aging (15 Years) fAGING/fC -7 +7 ppm

OE Pullup Resistance RPU T

A= +25°C 70 100 130 k

Note 1: Package thermal resistances were obtained using a two-layer board. For detailed information on package thermal consider-

ations, refer to www.maxim-ic.com/thermal-tutorial.

DS4625

3.3V Dual-Output LVPECL Clock Oscillator

_______________________________________________________________________________________ 3

Note 2: Limits at -40°C are guaranteed by design and are not production tested.

Note 3: AC parameters are guaranteed by design and not production tested.

Note 4: Startup time is from VCC = VCCMIN until PLL locks to the crystal oscillator output.

Note 5: Frequency stability is calculated as: ΔfTOTAL = ΔfTEMP + ΔfVCC x (3.3 x 10%) + ΔfLOAD + ΔfAGING.

Note 6: Supply-induced jitter is the deterministic jitter as measured on a LeCroy SDA11000 measured with a 50mVP-P sine wave

forced on VCC.

SINGLE-SIDEBAND PHASE NOISE

SSB PHASE NOISE (dBc/Hz) (TYPICAL, +25°C, +3.3V)

OFFSET fC = 100MHz fC = 125MHz fC = 150MHz fC = 156.25MHz fC = 200MHz UNITS

100Hz -71 -85 -84 -79 -85

1kHz -116 -117 -116 -115 -113

10kHz -119 -118 -116 -117 -113

100kHz -126 -125 -122 -123 -120

1MHz -143 -142 -141 -140 -139

10MHz -151 -149 -149 -148 -149

20MHz -151 -150 -149 -149 -150

dBc/Hz

ELECTRICAL CHARACTERISTICS (continued)

(VCC = +2.97V to +3.63V, TA= -40°C to +85°C, typical values are at VCC = +3.3V and TA= +25°C, unless otherwise noted.) (Notes 2, 3)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Output High Voltage VOH Output connected to 50 at PECL_BIAS at

VCC - 2.0V

VCC -

1.085

VCC -

0.88 V

Output Low Voltage VOL Output connected to 50 at PECL_BIAS at

VCC - 2.0V

VCC -

1.825

VCC -

1.62 V

Differential Output Voltage |VOD|Output connected to 50 at PECL_BIAS at

VCC - 2.0V 0.595 0.710 V

Output Rise Time tR 20% to 80% 200 ps

Output Fall Time tF 80% to 20% 200 ps

Duty Cycle DCYCLE 45 55 %

Propagation Delay from OE

Going Low to Output High

Impedance

tPAZ (See Figure 2) 100 ns

Propagation Delay from OE

Going High to Output Active tPZA (See Figure 2) 100 ns

Jitter JRMS Integrated phase RMS, 12kHz to 20MHz,

VCC = +3.3V, TA= +25°C 0.7 ps

Accumulated Deterministic

Jitter Due to Reference Spurs

125.00MHz output, VCC = +3.3V,

TA= +25°C 0.1 ps

10kHz 12.9 ps

100kHz 26.3 ps

200kHz 20.1 ps

Accumulated Deterministic

Jitter Due to Power-Supply Noise

(P-P) (Note 6)

1MHz 6.4 ps

DS4625

3.3V Dual-Output LVPECL Clock Oscillator

4 _______________________________________________________________________________________

Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

fC DEVIATION vs. TEMPERATURE

DS4625 toc01

TEMPERATURE (°C)

DEVIATION (ppm)

6040200-20

-40

-30

-20

-10

-50

-40

fC DEVIATION vs. VCC

DS4625 toc02

VCC (V)

DEVIATION (ppm)

3.63.53.43.33.23.1

0.5

1.0

1.5

2.0

2.5

3.0

ICC vs. VCC

DS4625 toc03

VCC (V)

CURRENT (mA)

3.53.43.33.23.1

100

110

120

130

140

3.0 3.6

ICC_PU

ICC_PL

ONE OUTPUT LOADED

Pin Description

PIN NAME FUNCTION

1 OE Active-High Output Enable. Has an internal pullup resistor (RPU).

2, 3 GND Ground

4 OP1 Positive Output 1 for LVPECL

5 ON1 Negative Output 1 for LVPECL

6 VCC Supply Voltage Input

A1, A2 N.C. No Internal Connection. Must be connected to ground.

A3 OP2 Positive Output 2 for LVPECL

A4 ON2 Negative Output 2 for LVPECL

— EP

Exposed Pad. The exposed pad must be used for thermal relief. This pad must be connected to

ground.

DS4625

3.3V Dual-Output LVPECL Clock Oscillator

_______________________________________________________________________________________ 5

X1 X0 PLL

X2 PFD LPF

LC-VCO DIV M

DIV P

DIV N

LVPECL

VCC

GND

OP1

ON1

LVPECL

OP2

ON2

DS4625

RPU

VCC

Figure 1. Block Diagram

OP_

tPZA

0.7 x VCC

0.3 x VCC

PECL_BIAS PECL_BIAS

ON_

tPAZ

Figure 2. LVPECL Output Timing Diagram When OE is Enabled and Disabled

DS4625

3.3V Dual-Output LVPECL Clock Oscillator

6 _______________________________________________________________________________________

Detailed Description

The DS4625 is a dual-output, low-jitter clock oscillator

that produces frequency output pair combinations as

shown in the

Ordering Information/Selector Guide

table.

The phase relationship between the outputs is not guar-

anteed. The device combines an AT-cut, fundamental-

mode crystal, an oscillator, and a low-noise PLL in a

5.0mm x 3.2mm surface-mount LCCC package.

The DS4625 provides dual LVPECL clock output dri-

vers. The output drivers can be enabled and disabled

through the OE pin. The OE pin is an active-high CMOS

input that has an internal pullup resistor. When OE is

high, both output pairs are enabled.

Chip Information

PROCESS: Bipolar SiGe

Package Information

For the latest package outline information and land patterns,

go to www.maxim-ic.com/packages. Note that a “+”, “#”, or

“-” in the package code indicates RoHS status only. Package

drawings may show a different suffix character, but the drawing

pertains to the package regardless of RoHS status.

TOP VIEW

GND

N.C. N.C.

A1 A2

A3 A4

OP2 ON2

GND

VCC

ON1

OP1

(5.00mm

3.20mm

1.49mm)

DS4625

*EP

*EXPOSED PAD

Pin Configuration

PACKAGE TYPE PACKAGE CODE DOCUMENT NO.

10 LCCC L1053+H2 21-0389

VCC OP1

ON1

GND

0.01μF

0.1μF

50Ω

PECL_BIAS AT VCC - 2.0V

OP2

ON2

50Ω

PECL_BIAS AT VCC - 2.0V

DS4625

Typical Application Circuit

DS4625

3.3V Dual-Output LVPECL Clock Oscillator

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________

Revision History

REVISION

NUMBER

REVISION

DATE DESCRIPTION PAGES

CHANGED

0 4/09 Initial release. —

1 3/10

Changed the operating temperature range limit from +70°C to +85°C, and added a new

part number to the Ordering Information table. 1, 2, 3