Product Description:NECLFreq.Divider(f/2,f/4),SMAI/O

PRL-255N-SMA

Manufacturer Part NumberPRL-255N-SMA
DescriptionProduct Description:NECLFreq.Divider(f/2,f/4),SMAI/O
ManufacturerPULSE RESEARCH LAB
PRL-255N-SMA datasheet
 


Specifications of PRL-255N-SMA

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PRL-255N/P ÷ ÷ ÷ ÷ 2 and ÷ ÷ ÷ ÷ 4 NECL/PECL FREQUENCY DIVIDERS
APPLICATIONS
GHz Frequency Division in Device Test and
Systems Integration
High speed Clock signal Generation for SONET
applications
An Essential Lab Tool for Working with GHz
NECL/PECL Circuits
FEATURES
3 GHz Toggle Frequency
Single-ended or Differential Inputs
Internal 50 Ώ/V
Input Terminations
TT
Complementary Outputs drive 50 Ώ Loads
terminated to V
, AC coupled or floating 50 Ώ
TT
Loads
DC Coupled I/O's Compatible with ECLinPS or
10KH Devices
BNC or SMA I/O Connectors
Ready-to-Use 1.3 x 2.9 x 2.2-in. Module includes
a ±8.5V AC/DC Adaptor
DESCRIPTION
The PRL-255N and PRL-255P are, respectively, NECL and PECL frequency divider modules, each containing ÷2 and a ÷4
frequency dividers capable of toggling at frequencies in excess of 3GHz. The module can also provide the ÷8 function by
cascading the two dividers. The PRL-255N and the PRL-255P are essential lab tools for device test and systems integration
in wireless and digital communications applications.
Each divider in the module has differential inputs and complementary outputs. A common switch selects either single-ended
or differential inputs. In the differential input mode, both inputs CLK and CLK are terminated internally into 50Ω /V
where V
is equal to -2V for NECL and +3V for PECL, and, therefore, either one or both inputs can accept AC coupled
TT
signals as well. In the single input mode, input signals should be connected to the CLK inputs only. The CLK inputs are
internally switched to V
, nominally -1.3Vfor NECL and +3.7V for PECL, and input resistors R
BB
channels are changed to 62 Ω . Complementary outputs of both channels are designed for driving 50 Ω loads terminated into
, AC coupled or floating 50 Ω loads.
V
TT
Either output from the PRL-255N can drive a single-ended NECL input. The PRL-255P complementary outputs, however,
must be used together for driving differential PECL inputs only, because the reduced output logic swing of 400mVp-p, due to
short circuit protection reasons, is not logic level compatible with single-ended PECL input.
Block diagrams of the PRL-255N and PRL-255P are shown in Figs. 1A and 1B.
The PRL-255N and PRL-255P are each housed in a 1.3 x 2.9 x 2.2-in. extruded aluminum enclosure and is supplied with a
±8.5V/1A AC/DC Adaptor.
If mounting is desired, a pair of 35001420 mounting brackets can accommodate two PRL modules of the same length. A
number of PRL modules can also share a single ±8.5V AC/DC adaptor using the PRL-730 or PRL-746 voltage distribution
module. Please see the Accessories Section for more detail.
PRL-255N NECL Frequency Divider
's for the CLK input
T
1234 Francisco Street, Torrance, CA 90502
Tel: 310-515-5330 Fax: 310-515-0068
sales@pulseresearchlab.com
www.pulseresearchlab.com
,
TT

PRL-255N-SMA Summary of contents

  • Page 1

    ... PECL input. Block diagrams of the PRL-255N and PRL-255P are shown in Figs. 1A and 1B. The PRL-255N and PRL-255P are each housed in a 1.3 x 2.9 x 2.2-in. extruded aluminum enclosure and is supplied with a ±8.5V/1A AC/DC Adaptor. ...

  • Page 2

    ... If a single output is used, one other complementary output must be terminated; otherwise, output waveform distortion and rise time degradation will occur. Use the PRL-550NQ/PQ4X, four channel NECL/PECL Terminators, respectively, for the 50 Ω /V termination and for connection TT ...