PE3345BFY-250.0M [PLETRONICS]

Oscillator;


型号：	PE3345BFY-250.0M
厂家：	PLETRONICS, INC.
描述：	Oscillator
文件：	总5页 (文件大小：89K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Pletronics, Inc.

19013 36^thAve. West PO Box 2607 Lynnwood, Washington

T: 1-425-776-1880 F: 1-425-776-2760 E: ple-sales@pletronics.com

www.pletronics.com

98036 U.S.A.

Effective January 1, 2008

PE11xxBY

PE33xxBY

PE37xxBY

Devices are OBSOLETE

This has been discontinued because:

•

the difficulty of the older design to assemble well in the newer RoHS compliant high

temperature reflow processes.

the cover assembly was not meeting some of the cleaning and assembly needs of the newer

processes.

the components needed to make these parts are no longer available.

This requirement is best met by using a PE99xxDV oscillator and a -3.3V regulator and operating the

device from the 5.0V supply.

Pl tronics, Inc.

19013 36th Ave. W, Suite H Lynnwood, WA 98036 USA

Manufacturer of High Quality Frequency Control Products

Differential PECL Series

Differential PECL Output, Some with Enable/ Disable Function

Available in 9 Different Package/Configurations, See Next Pages

Standard Specifications

Overall Frequency Stability

± 50 PPM, ± 25 PPM, ± 20 PPM over Operating Temperature Range

Operating Temperature Range 0 to +80°C is standard, but can be extended to - 40 to +85°C

Storage Temperature Range

Supply Voltage (Vcc)

Supply Current (Icc)

- 55 to +125°C

3.3 volts ± 5% standard, but 5.0 volts or 2.5 volts also available. See Test Cirucit 5.

< 250 MHz = 90 mA maximum, 250 MHz and above = 100 mA maximum

Output High Level

2.275 V minimum referenced to Ground, Vcc = 3.300V,

0.975 V minimum referenced to termination voltage,

- 1.025 V minimum referenced to Vcc

Output Low Level

1.680 V maximum referenced to Ground, Vcc = 3.300V,

0.380 V maximum referenced to termination voltage,

- 1.620 V maximum referenced to Vcc

Output Symmetry

Output Rise & Fall (Tr & Tf)

Jitter

E/D Internal Pullup

V disable

45/55% referenced to 50% of amplitude

1.0 nS maximum when Vth is 10% and 90% of waveform

1 pS RMS maximum measured from 12 kHz to 20 MHz from Fnominal

50 kohm minimum to Vcc

0.3 Vcc maximum referenced to Ground

V enable

0.7 Vcc minumum referenced to Ground

PE7745D only Output Enable / Disable

High Level Input Current

Low Level Input Current

Output Enable Time

-20 uA maximum at Enable / Disable Pin = 0.7 Vcc

-200 uA maximum at Enable / Disable Pin = 0 V

200 nS maximum at output enable or 1 mS maximum at output enabled and stable

200 nS maximum at output disable

Output Disable Time

Vcc Supply Current disabled < 1 mA. Both outputs are high impedance when disabled.

All other models Output Enable/Disable (E/D)

Output Enable Time

Output Disable Time

When Disabled

100 nS maximum

Q Output = Logic Low, QN Output = Logic High. Both Outputs are active

Note 1:

PECL and ECL are identical circuits.

ECL has the most positive pin as ground and is ideally terminated by 50 ohms to - 2.00 V

PECL has the most negative pin as ground and is ideally terminated by 50 ohms to the most (positive voltage less 2.00 V)

Mechanical: See Next Pages

D Package

J Package Replacement

B Package

M Package

Mar 2004

(425) 776 -1880, Fax: (425) 776-2760, ple-sales@pletronics.com, www.pletronics.com

Pl tronics, Inc.

19013 36th Ave. W, Suite H Lynnwood, WA 98036 USA

Manufacturer of High Quality Frequency Control Products

B Package PECL Series

PE1145T, PE1145B, PE3345B, PE3745B

Differential PECL Output with Enable/ Disable Function, 5.0 Vcc or 3.3 Vcc

–

1.50 MHz

650.00 MHz

6 Pad 14x10x3mm Leadless Surface Mount Clock Oscillator

Part Numbering Guide

Portions of the part number that appear after the frequency may not be marked on part (C of C provided)

PE11 45 B V - 70.0M - XXX (Internal Code or blank)

Model Series

Frequency in MHz

Special Specifications (choose all that apply)

> 120.0 MHz to 650 MHz (5.0 Vcc)

> 180.0 MHz to 650 MHz (3.3 Vcc)

PE1145T = E/D on pin2

E: Extended Operating Temperature Range (- 40 to +85 C)

F: 47.5 /52.5% Symmetry at 50% of Vcc

V: Supply Voltage of 3.3 volts ± 10%

Y: Supply Voltage of 5.0 volts ± 10%

1.5 MHz to 120 MHz (5.0 Vcc)

1.5 MHz to 180 MHz (3.3 Vcc)

Packaging

Tube or

24mm tape,

16mm pitch

Frequency Stability

PE1145B = E/D on pin2, QN on pin 1

PE3345B = E/D on pin 2, QN on pin 5

PE3745B = E/D on pin 1, QN on pin 5

45 = ± 50 PPM

44 = ± 25 PPM

20 = ± 20 PPM

Consult factory for available frequencies and specs. Not all options available for all frequencies. A special part number may be assigned.

Frequency Stability is inclusive of frequency shifts due to calibration, temperature, supply voltage, shock, vibration and load

Mechanical: inches (mm)

not to scale

Solder Pads

Due to part size and factory abilities, part marking may vary from lot to lot and may contain our part number or an internal code.

0.200 (5.08)

0.560 (14.23) MAX

0.125 (3.17)

MAX

0.200 (5.08)

0.055 0 .145

(1.4) (3.68)

PE1145T

PE1145B

PE3345B

PE3745B

PIN SIGNAL

QN OUT

E/D

GND

Q OUT

N.C.

E/D

GND

Q OUT

QN OUT

Vcc

N.C.

E/D

GND

Q OUT

QN OUT

Vcc

E/D

N.C.

GND

Q OUT

QN OUT

Vcc

See page 6 for Layout Guidelines

Vcc

> 180.0 MHz to 650.0 MHz (3.3 Vcc)

> 120.0 MHz to 650.0 MHz (5.0 Vcc)

Jun 2004

1.5 MHz to 180.0 MHz (3.3 Vcc)

1.5 MHz to 120.0 MHz (5.0 Vcc)

(425) 776 -1880, Fax: (425) 776-2760, ple-sales@pletronics.com, www.pletronics.com

Pl tronics, Inc.

19013 36th Ave. W, Suite H Lynnwood, WA 98036 USA

Manufacturer of High Quality Frequency Control Products

PECL and LVDS Layout Guidelines

'B Pkg'

5 x7

SUGGESTED PCB LAYOUTS

Solder Pad Layout which

accommodates all PECL surface mount

devices

TOP SIDE

BYPASS

0.200 (5.08)

0 .185

(4.7)

0 .087

(2.2)

BOTTOM

SIDE

BYPASS

0.055 0.100

(1.4) (2.54)

The output line should be designed with proper characteristic

impedance. Pletronics recommends laying out for the larger

'B package' with pads long enough to accept the smaller

5 x 7mm device. This permits the best option for alternate

sources of device. Pletronics also recommends connecting

Pin 1 and Pin 2 together on the models with

MULTI

LAYER

BYPASS

Q & QN OUT on pins 4 & 5. This allows

having E/D on either pin 1 or pin 2.

For Optimum Jitter Performance, Pletronics recommends:

A ground plane under the device with any other signals below the ground plane

Minimize other RF signals near device

No large transient signals (both current and voltage) should be routed under the device

Do not layout near a large magnetic field such as a high frequency switching power supply

Do not place near piezoelectric buzzers or mechancial fans

Reflow Cycle for lead free processing

260°C max

10 Seconds max

250

200

150

100

175°C ± 10°C

120 to 160 Seconds

215°C ± 10°C

50 Seconds

T Rise= 4 Degree/second max

Mar 2004

(425) 776 -1880, Fax: (425) 776-2760, ple-sales@pletronics.com, www.pletronics.com

Pl tronics, Inc.

19013 36th Ave. W, Suite H Lynnwood, WA 98036 USA

Manufacturer of High Quality Frequency Control Products

PECL and LVDS Layout Guidelines Continued

PECL Terminations:

Suggested Terminations for 50 ohm impedance matched termination

Vcc

Thevenin Equivalent Termination

Vcc

5.0 V

82 ohm

130 ohm

82 ohm

Vcc

Oscillator

Vcc

Out

Oscillator

3.3 V 130 ohm

2.5 V 249 ohm 61.9 ohm

GND

50 ohm

GND

Vcc - 2.00 V

Simple termination for NON impedance matched termination

Vcc

R load

274 ohm

147 ohm

86.6 ohm

Vcc

Oscillator

Out

5.0 V

3.3 V

2.5 V

GND

R load

LVDS Terminations:

Vcc

Oscillator

QN Out

Q Out

Design PCB traces for 50 ohm characteristic impedance

100 ohm

GND

Mixed System Power Supply:

To use multiple supply voltages requires level translation. Direct circuit connection is not valid.

PECL

Mixed supply voltages are allowed. No translation is necessary. (ECL is returned to the most positive

supply and this is common to all circuits)

ECL

Mixed supply voltages are allowed. LVDS signal levels are power supply independent.

3.3 V LVDS oscillators properly interface 2.5 V Logic Arrays for example.

LVDS

Mar 2004

(425) 776 -1880, Fax: (425) 776-2760, ple-sales@pletronics.com, www.pletronics.com

Pl tronics, Inc.

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