VCC6-RCF-110M00 [ETC]

2.5 and 3.3 volt LVPECL Crystal Oscillator; 2.5和3.3伏LVPECL晶体振荡器


型号：	VCC6-RCF-110M00
厂家：	ETC
描述：	2.5 and 3.3 volt LVPECL Crystal Oscillator 2.5和3.3伏LVPECL晶体振荡器振荡器晶体振荡器
文件：	总8页 (文件大小：345K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

VCC6-Q/R Series

2.5 and 3.3 volt LVPECL Crystal Oscillator

Features

· 2.5 or 3.3V LVPECL

· 3^rdOvertone Crystal for best jitter performance

· Output frequencies to 270 MHz

· Low Jitter < 1 pS rms, 12kHz to 20MHz

· Enable/Disable for test and board debug

· -10/70 or –40/85 °C operating temperature

· Hermetically sealed ceramic SMD package

· Product is compliant to RoHS directive

The VCC6 Crystal Oscillator

Applications

· SONET/SDH/DWDM

· Fiber Channel

Enable/Disable

· Ethernet, Gigabit Ethernet

· Storage Area Network

· Digital Video

· Broadband Access

OUT

Description

OUT

Output

Buffer /

Disable

Vectron’s VCC6 Crystal Oscillator (XO) is quartz

stabilized square wave generator with a LV-PECL

output, operating off a 3.3 volt supply.

The VCC6 uses 3^rdovertone crystals for

frequencies under 200MHz, resulting in low jitter

performance, typically 0.3pS rms in the 12 kHz to

20MHz band.

Vectron International 267 Lowell Road, Hudson NH 03051

Tel: 1-88-VECTRON-1

e-mail: vectron@vectron.com

VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator

Performance Characteristics

Table 1. Electrical Performance

Parameter

Symbol

f_O

Min

3.15

2.375

Typical

Maximum

270

Units

MHz

Frequency

Supply Voltage¹, 3.3V Q option

2.5V R option

V_DD

3.3

2.5

3.45

2.625

Supply Current

I_DD

Output Logic Levels, 0/70°C

Output Logic High²

V_OH

V_OL

V_DD-1.025

V_DD-1.810

V_DD-0.880

V_DD-1.620

Output Logic Low²

Output Logic Levels, -40/85°C

Output Logic High²

V_OH

V_OL

V_DD-1.085

V_DD-1.830

V_DD-0.880

V_DD-1.555

Output Logic Low²

Transition Times

Rise Time²

t_R

t_F

SYM

T_OP

600

°C

ppm

Fall Time²

Symmetry or Duty Cycle³

Operating temperature (ordering option)

Stability (ordering option)⁴

Jitter, 12kHz to 20MHz⁵

Cycle to Cycle, rms

Cycle to Cycle, peak-peak

Period Jitter, rms

-10/70 or –40/85

±25, ±50 or ±100

deltaF/F

0.7

0.3

4.8

2.7

Period Jitter, peak-peak

Output Enabled⁶

V_IH

V_IL

t_E/D

I_IL

0.7*V_DD

Output Disabled⁶

0.3*V_DD

200

±200

Output Enable/Disable time

Enable/Disable Leakage Current

Output Enable Pull-Up Resistor⁶

Output Enabled

Kohm

Mohm

Output Disabled

1. A 0.01uF and a 0.1uF capacitor should be located as close to the supply as possible and terminated to ground.

2. Figure 1 defines these parameters. Figure 2 illustrates the operating conditions under which these parameters are tested and specified.

3. Symmetry is measured defined as On Time/Period.

4. Includes calibration tolerance, operating temperature, supply voltage variations, aging (40 degreesC/10 years) and shock and vibration (not under

operation).

5. Measurements made on a VCC6-QAB-155M520 using an Agilent E5052A for phase noise and LeCroy 8600, 25K samples for jitter.

6. Output will be enabled if Enable/Disable is left open. The pull resistor changes to a higher value, operating in a “power saving mode” when

Enable/Disable is set to a logic 0.

t_F

t_R

20%

On Time

Period

Figure 1. Output Waveform

Figure 2. Typical Output Test Conditions (25±5°C)

Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1

e-mail: vectron@vectron.com

VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator

Outline Diagram and Pin Out

Table 2. VCC6-QAx Pinout

Pin #

Symbol

E/D

GND

f_O

Function

This pin has no internal connection and is floating.

Enable/Disable Function

Ground

Output Frequency

Complementary Output Frequency

Supply Voltage

Cf_o

V_DD

Gold over Nickel plating

Figure 3 Optional VCC6-QAx Package Drawing

Table 3. VCC6-QCx Pinout

Pin #

Symbol

E/D

GND

f_O

Function

Enable/Disable Function

This pin has no internal connection and is floating.

Ground

Output Frequency

Complementary Output Frequency

Supply Voltage

Cf_o

V_DD

Gold over Nickel plating

Figure 4. VCC6-QCx and VCC6-QAx Package Drawing

Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1

e-mail: vectron@vectron.com

VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator

Terminating PECL Outputs

The VCC6 incorporates a standard PECL output scheme, which are un-terminated emitters as shown in

Figure 5. There are numerous application notes on terminating and interfacing PECL logic and the two most

common methods are a single resistor to ground, Figure 6, and a pull-up/pull-down scheme as shown in

Figure 7. An AC coupling capacitor is optional, depending on the application and the input logic

requirements of the next stage.

One of the most important considerations is terminating the Output and Complementary Outputs equally.

An unused output should not be left un-terminated, and if it one of the two outputs is left open it will result in

excessive jitter on both. PC board layout must take this and 50 ohm impedance matching into account.

Load matching and power supply noise are the main contributors to jitter related problems.

Figure 5. Standard PECL Output Configuration

Figure 6. Single Resistor Termination

Resistor value are typically:

120 to 240ohms for 3.3V

Figure 7. Pull-up Pull-down Termination

Resistor values are typically:

130 and 82 ohms for 3.3V

82 to 120 ohms for 2.5V

240 and 62 ohms for 2.5V

Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1

e-mail: vectron@vectron.com

VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator

Enable/Disable Functional Description

Under normal operation the Enable/Disable is left open, or set to a logic high state, and the VCC6 is in

oscillation mode and outputs are enabled (active). When the E/D is set to a logic low, the oscillator stops

and the both the output and complementary outputs are in a high impedance state. This helps facilitate

board testing and troubleshooting.

Power Saving Pull-Up Resistor

The E/D pull-up resistor changes in response to the input logic level; the pull-up resistor is a large value

when E/D is set to a logic low, which reduces the current consumed. When E/D is open, or set to a logic

high, the pull-up resistance becomes a smaller value which helps decrease the effects of external noise.

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can permanently damage the device. Functional

operation is not implied at these or any other conditions in excess of conditions represented in the

operational sections of this data sheet. Exposure to absolute maximum ratings for extended periods may

adversely affect device reliability.

Table 4. Absolute Maximum Ratings

Parameter

Power Supply

Enable/Disable

Storage Temperature

Symbol

V_DD

V_IN

Tstorage

Ratings

-0.5 to +7.0

-0.5 to V_DD+0.5

-55/125

Unit

Vdc

°C

Reliability

The VCC6 qualification tests included:

Table 5. Environnemental Compliance

Parameter

Conditions

Mechanical Shock

Mechanical Vibration

Solderability

Gross and Fine Leak

Resistance to Solvents

MIL-STD-883 Method 2002

MIL-STD-883 Method 2007

MIL-STD-883 Method 2003

MIL-STD-883 Method 1014

MIL-STD-883 Method 2016

Handling Precautions

Although ESD protection circuitry has been designed into the the VCC6, proper precautions should be taken

when handling and mounting. VI employs a Human Body Model and a Charged-Device Model (CDM) for

ESD susceptibility testing and design protection evaluation. ESD thresholds are dependent on the circuit

parameters used to define the model. Although no industry wide standard has been adopted for the CDM, a

standard HBM of resistance = 1.5kohms and capacitance = 100pF is widely used and therefore can be

used for comparison purposes.

Table 6. ESD Ratings

Model

Human Body Model

Charged Device Model

Minimum

1500

Conditions

MIL-STD-883 Method 3015

1000

Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1

e-mail: vectron@vectron.com

VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator

IR Reflow and Suggested Pad Size Layout

The VCC6 has been qualified to meet the JEDEC standard for Pb-Free assembly. The temperatures and

time intervals listed are based on the Pb-Free small body requirements and maximum parameters are listed

in Table 6, lower temperatures are also acceptable. The VCC6 is hermetically sealed so an aqueous wash

is not an issue. Frequencies >200MHz will need to be reflowed at 220C max.

Table 7. Reflow Profile (IPC/JEDEC J-STD-020B)

Parameter

PreHeat Time

Ramp Up

Symbol

t _S

Value

60 sec Min, 200 sec Max

3 ^oC/sec Max

R_UP

t _L

Time Above 217 C

Time To Peak Temperature

Time At 260 ^oC (max)

Time At 240°C (max)

Ramp Down

60 sec Min, 150 sec Max

480 sec Max

t _AMB-P

t _P

10 sec Max

tp2

60 sec MAX

6 ^oC/sec Max

R_DN

Figure 8. IR Reflow Diagram

Figure 9. Pad Size Diagram

Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1

e-mail: vectron@vectron.com

VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator

Tape and Reel

Figure 10. Tape and Reel Diagram

Table 8. Tape and Reel Dimensions (mm)

Tape Dimensions

Reel Dimensions

# Per

Product

Reel

7.5

1.5

180

VCC6

250

Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1

e-mail: vectron@vectron.com

VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator

Table 9. Standard Frequencies (MHz)

19.440

40.000

27.000

40.680

27.027

48.000

35.000

50.000

37.000

52.300

38.880

62.500

64.000

80.000

64.375

83.125

74.1758

87.000

74.250

90.000

76.800

91.875

77.760

93.000

98.304

100.000

130.000

143.000

156.250

161.1328

166.6667

173.3707

200.000

105.000

130.5882

145.221

156.256

163.235

166.67

106.000

133.000

150.000

156.260

164.3555

167.00

106.250

134.560729

153.500

159.375

165.000

167.3316

187.500

260.000

110.000

135.000

155.520

160.000

166.000

168.200912

190.000

125.000

136.000

156.000

160.160

166.6286

171.000

195.3125

175.000

212.500

180.000

250.000

Other frequencies may be available upon request. Standard frequencies are frequencies which the crystal

has been designed and does not imply a stock position.

Ordering Information

VCC6 – Qxx – xxxMxx

Product Family

Frequency MHz

Crystal Oscillator

example: 125M00= 125.000

Stability Options/Temperature

Supply Voltage, Output

Q=3.3V, LVPECL

A: ±100ppm

B: ±50ppm

C: ±100ppm

D: ±50ppm

E: ±25ppm

F: ±25ppm

-10 to 70°C

-40 to 85°C

-10 to 70°C

-40 to 85°C

R=2.5V, LVPECL

Enable/Disable

A: E/D is on Pin 2, Pin 1 is a NC

C: E/D is on Pin 1, Pin 2 is a NC

NOTE: Not all combinations of options are available.

A ±20ppm option over -10/70°C 3.3V, VCC6-107-frequency, is also available

A ±20ppm option over -10/70°C 2.5V, VCC6-110-frequency, is also available.

For Additional Information, Please Contact:

USA: Vectron International · 267 Lowell Road, Hudson, NH 03051

· Tel: 1-88-VECTRON-1 · Fax: 1-888-FAX-VECTRON

EUROPE: Landstrasse, D-74924, Neckarbischofsheim, Germany ·

Tel: 49 (0) 7268 8010 · Fax: 49 (0) 7268 801281

ASIA: Vectron Asia Pacific Sales 1F~2F. No.8 Workshop No.308 Fenju Rd., WaiGaoQiao Free

Trade Zone, Pudong New Area Shanghai, China 200131

•Tel: 8621 50480777 • Fax: 8621 50481881

www.vectron.com

Vectron International reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is assumed

as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.

VCC6-Q/R (REVISION DATE: September 07, 2005)

Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1

e-mail: vectron@vectron.com

相关型号：