Datasheet > PE3345BEF-250.0M

PE3345BEF-250.0M

更新时间： 2024-11-28 20:51:07

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Oscillator

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PE3345BEF-250.0M 技术参数

生命周期：	Active	Reach Compliance Code：	compliant
风险等级：	5.57	Base Number Matches：	1

PE3345BEF-250.0M 数据手册

Pl tronics, Inc.

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

Manufacturer of High Quality Frequency Control Products

PE3345B PECL Series

4 Pad Leadless Surface Mount Clock Oscillator

–

10.00 MHz 170.00 MHz

Differential PECL Output with Enable/ Disable Function

See PE1145T for higher frequencies

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 for certain frequencies

Supply Voltage (Vcc)

Supply Current (Icc)

Jitter

3.3 volts ± 10% standard, but 5.0 volts or 2.5 volts also available

60 to 70 mA typical, 90 mA maximum for 70 MHz. For < 70 MHz, consult factory

1 pS RMS maximum, from 12 kHz to 20 MHz from carrier for ³ 70 MHz. For < 70 MHz, consult factory

Output must be terminated into 50 ohms to (Vcc - 2.0 V). See Test Circuit 5 and Note 1.

Output enabled when Pin 2 is open or at CMOS Logic “1”;

Output Load

Enable/Disable Option (E/D)

Output disabled when Pin 2 is at CMOS Logic “0”.

Symmetry

Tr & Tf

Logic “1”

45/55% to 55/45% at 50% of Vcc level standard, tighter symmetry available

Output Waveform

PECL with Differential Output

(see Waveform 2)

1.0 nS max (20 to 80%) for 70 MHz. For < 70 MHz, consult factory

Vcc - 1.025 volts minimum

Vcc - 1.620 volts maximum

Logic “0”

Note 1:

In the typical PECL 100K logic output Voh is 2.35 volts and Vol is 1.60 volts at 3.3 Vcc. The center voltage of the PECL is therefore1.975 volts.

If a 50 ohm resistor is placed between the output and Vcc – 2 volts (1.3 volts), the current through the resistor is (1.975 – 1.3) / 50 = 13.5 mA.

The same load can be simulated by a resistor of 147 1% ohms to ground (1.975 / 0.0135 = 146.29 ohms). If additional load current is placed

on the output, its load current must be subtracted from the 13.5 mA to calculate a new load resistor. Using similar calculations, use 274 ± 1%

ohms to ground for 5.0V operation.

Part Numbering Guide

Packaging

Tray or

24mm tape,

16mm pitch

PE33 45 B Y -- 70.0M

Model

Frequency in MHz

Special Specifications (choose all that apply)

Frequency Stability

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%

45 = ± 50 PPM

44 = ± 25 PPM

20 = ± 20 PPM

W: Supply Voltage of 2.5 volts ± 5%

Y: Supply Voltage of 5.0 volts ± 10%

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

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.

PE1145B Series

PE3X45B Series

Possible Pinout Options, Consult Factory for Alternate Pinouts

(Remove center pads

for PE3145B)

Q Out N.C. Vcc

Q Out

Vcc

Q Out QN Vcc

PLE

.05

(1.3)

Solder Pads

PE1145B

PE3145B

PE3345B

GND E/D QN Out

GND QN Out

GND E/D N.C.

.560 (14.23) MAX

.125 (3.17)

MAX

.200 (5.08)

May 2002

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

Pl tronics, Inc.

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