Copyright protected Swindon Silicon Systems Ltd
SSSB220
1
February 2003
Figure 1 Block Diagram
SSSB220
6 GHz
÷
2 Prescaler
The SSSB220 is one of a range of very high speed low power prescalers for
professional applications. The dividing elements are static D type flip flops and
therefore allow operation down to DC if the drive signal is a pulse waveform with
fast risetime. The output stage has a differential output and provides a direct drive
into a 50 ohm load.
FEATURES
Very high operating speed
Operation down to DC with square wave input
Silicon technology for low phase noise (typically better than 140dBc/Hz at 1KHz)
3V to 5V single supply operation
Low power dissipation: 200mW (typical)
Surface mount plastic package
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
6.5V
Output Current
20mA
Storage Temperature Range
-55ēC to +125ēC
Maximum Clock Input Voltage
2.5V p-p
Copyright protected Swindon Silicon Systems Ltd
SSSB220
2
Figure 2 Pin connections top view
Electrical Characteristics
These characteristics are guaranteed by either production test or design over
the following range of operating conditions unless otherwise stated:
T
AMB
= -40c to +85c, V
CC
= 3.0V to 5.0V
Value
Units
Conditions
Characteristics
Pin
Min
Typ
Max
Supply current
1,8
-
5.0
70
mA
Input frequency
2, 3
1.0
-
6.0
GHz
Sinewave input
Input sensitivity
2, 3
-
-
140
mVrms
Input overload
2, 3
700
-
-
mVrms
Output voltage
6, 7
-
0.5
-
Vp-p
Into 50
pullup resistor
Output power
6, 7
-5
-2
+1
dBm
Figure 3 Typical input sensitivity ( sinewave input )
Input Sensitivity
0
100
200
300
400
500
600
700
0
1
2
3
4
5
6
7
8
9
F r e q u e n c y ( G H z )
Vin ( rms )
Copyright protected Swindon Silicon Systems Ltd
SSSB220
3
Figure 4 Typical application and test circuit
Figure 5 Typical input impedance
Copyright protected Swindon Silicon Systems Ltd
SSSB220
4
Figure 6 Package Outline 8 pin miniature plastic SO8
Headquarters
Swindon Silicon Systems Ltd
Radnor Street
Swindon SN1 3PR UK
Tel: +44 1793 649400
Fax: +44 1793 616215
Email:
sssl@sssl.co.uk
www.sssl.co.uk
This publication is issued to provide information
only which (unless agreed by the company in
writing) may not be used, applied or reproduced nor
form any part of any order or contract nor to be
regarded as a representation relating to the products
or services concerned. No warranty or guarantee
express or implied is made regarding the capability,
performance or suitability of any products or service.
The Company reserves the right to alter without prior
notice the specification, design or price of any
product or service. Information concerning possible
methods of use is provided as a guide only and does
not constitute any guarantee that such methods of use
will be satisfactory in a specific piece of equipment.
It is the user's responsibility to fully determine the
performance and suitability of any equipment using
such information and to ensure that any publication
or data sheet is up to date and has not been
superseded. These products are not suitable for use in
any medical products whose failure to perform may
result in significant injury or death to the user. All
products and materials are sold and services provided
subject to the Company's conditions of sale
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