Copyright protected Swindon Silicon Systems Ltd
SSSB219
1
July 2003
SSSB219
6 GHz
÷2/4/8/16 Prescaler
The SSSB219 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) plus power down mode
Surface mount ceramic package
Figure 1 Block Diagram
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
SSSB219
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 7,10 30 50 75 mA
Power Down
7,10
-
25
50
uA
SEL1 and SEL2 = 0
Input current PUP 16
--50 -
+5
uA
Input current SEL 8,9
-- 5
-
+70
uA
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
SEL1 SEL2 PUP
Function
0 0 1
Divide
2
1 0 1
Divide
4
0 1 1
Divide
8
1 1 1
Divide
16
0 0 0 Power
down
Function Select Table
Copyright protected Swindon Silicon Systems Ltd
SSSB219
3
Figure 3 Typical input sensitivity (sinewave input)
Figure 4 Typical application and test circuit
Input Sensitivity
0
100
200
300
400
500
600
700
0
1
2
3
4
5
6
7
8
9
Fre que ncy ( GHz )
Vin ( rms )
Copyright protected Swindon Silicon Systems Ltd
SSSB219
4
Figure 5 Typical input impedance.
PITCH
(e)
OVERALL
(E, F)
DIE CAV
(A, B)
S/R CAV
(C, D)
THICKNESS
(t
1
/t
2
/T)
.050 .250SQ
.135SQ
.180SQ
.020/.020/.060
Unit: inch
F
D
B
A C
E
T
t
2
t
1
Figure 6. Package Outline 16 pin ceramic LCC
Copyright protected Swindon Silicon Systems Ltd
SSSB219
5
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
PDF 
ZIP