NECL Crystal Clock Source, 2 Channels, SMA Outputs

SKU:

$ 1,955.00

Quantity

Item	Description
88000102-4	Cable, triple voltage, with modular plugs, Length in ft.
88000103-4	Cable, triple voltage, with modular plug and pig tail leads, Length in ft.

Product Description
Diagrams
Applications
Specifications
Documents

Applications:

Precision Clock Source for High Speed Digital systems (SONET, SDH, ATM, Ethernet, Hypertransport, Firewire/1394, etc)
Differential NECL Clock Driver
SONET Clock Generator
An Essential Lab Tool for Working with NECL Circuits

Features:

50 ps typical edge jitter
50 ps typical skew between f, f outputs
50, 100, 200, 400, 500 and 622.08 MHz crystal frequencies in stock
Custom crystal frequencies available
Complementary outputs drive 50 Ω loads terminated to -2 V or AC coupled 50 Ω loads
DC coupled outputs compatible with ECLinPS or 100KH Devices
SMA I/O Connectors
Ready-to-Use 1.3 x 2.9 x 2.2-in. Module includes a -12 V AC/DC Adapter

Description

The PRL-170N is a ready-to-use NECL crystal clock source module with differential outputs suitable for driving 50 Ω loads terminated to -2 V or AC-coupled 50 Ω loads. Standard crystal frequencies provided are 50 MHz, 100 MHz, 200 MHz, 400 MHz, 500 MHz and 622.08 MHz. Other crystal frequencies are also available.

The PRL-170N is an essential laboratory tool in applications where a precision and low jitter high frequency clock source is required.

Model number designation is PRL-170N-xxx, where "xxx" represents the user specified clock frequency in MHz, such as 200 or 622, etc.

The PRL-170N is housed in a 1.3 x 2.9 x 2.2-in. extruded aluminum enclosure and supplied with a ±8.5 V AC/DC adapter.

PRL-170N Block Diagram

(0° C ≤ T_A ≤ 35° C)*

Symbol	Parameter	PRL-170N			Unit	Comments
Symbol	Parameter	Min	Typ	Max	Unit	Comments
V_OL	Output Low Level	-1.95	-1.70	-1.48	V
V_OH	Output High Level	-1.13	-0.90	-0.81	V
I_DC	DC Input Current	-300	-200		mA	Xtal freq. dependent
V_DC	DC Input Voltage	-12	-8.5	-7.5	V
V_AC	AC/DC Adapter Input Voltage	103	115	127	V
t_r/t_f	Rise/Fall Times (20%-80%), f, f outputs		500	650	ps	Note (1)
t_SKEW1	Skew between f and f outputs		20	75	ps
f_MAX	Max crystal clock frequency			825	MHz	Note (2)
∆f	Frequency Stability		100		ppm
	Frequency Jitter		20		ps
	Positive Duty Cycle		50	40	%
	Size	1.3 x 2.9 x 2.2			in.
	Weight excl. AC adapter	5			Oz
	Shipping weight incl. AC adapter	4			lb.

*All dynamic measurements are made with outputs terminated into 50 Ω/-2 V, using the PRL-550NQ4X , four channel NECL Terminator, connected to a 50 Ω input sampling oscilloscope.

Notes:

The output rise and fall times are measured with with all inputs terminated into 50 Ω/V_TT. For best performance all outputs should be terminated into 50 Ω/V_TT or else AC- coupled into 50 Ω loads. If a single output is used, its complement must be terminated; otherwise output waveform distortion will occur. If one pair of complementary outputs is used, the other complementary pair may remain unterminated. Use the PRL-550 Series, four channel NECL Terminator, for the 50 Ω/V_TT termination and for connection of NECL signals to 50 Ω input oscilloscopes. The PRL-ACT-50, Dual Channel AC-Coupled 50 Ω Terminator, may also be used to provide the 50 Ω/V_TT termination. If preservation of DC levels is not required, then the PRL-SC-104, 0.1 µf DC block or a 12 dB AC-coupled attenuator may be used to connect the NECL outputs to 50 Ω input instruments.

(2). The maximum attainable frequency of the PRL-170 is dependent on the availability of high frequency crystal clock oscillators, currently limited to 825 MHz.

PDF Datasheet