TL F 9340
DS8673DS8674
Low
Power
VHFUHF
Prescalers
April 1988
DS8673 DS8674 Low Power VHF UHF Prescalers
General Description
The DS8673 and DS8674 products are low power prescal-
ers which divide by 64 and 256 respectively The devices
are used in frequency synthesis applications such as TV
CATV cellular phone and instrumentation to divide a very
high frequency down to a frequency usable by low power
MOS PLL's
The devices have differential buffered inputs and comple-
mentary ECL outputs The inputs provide high input sensitiv-
ity and good isolation The DS8673 is pin compatible with
Plessey's SP4531 SP4632 and Motorola's MC12073 prod-
ucts The DS8674 is pin compatible with Plessey's SP4653
and Motorola's MC12074 products
Features
Y
1 0 GHz operating frequency
Y
25 mA typical supply current
Y
20 mV rms input sensitivity
Y
0 8V complementary ECL outputs
Y
Low output radiation
Block and Connection Diagrams
Dual-In-Line Package
TL F 9340 1
Top View
Order Number DS8673N or DS8674N
See NS Package Number N08E
TL F 9340 2
C1995 National Semiconductor Corporation
RRD-B30M105 Printed in U S A
Absolute Maximum Ratings
(Note 1)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
7V
Input Voltage
7V
Output Voltage
V
CC
a
0 5V
Operating Free Air Temperature Range
b
40 C to
a
85 C
Storage Temperature Range
b
65 C to
a
150 C
ESD rating is to be determined
Recommended Operating Conditions
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
CC
Power Supply Voltage Range
4 5
5 5
V
F
IN
Input Frequency Range
V
IN
Min
80
1 000
MHz
V
IN
Input Sensitivity into 50X
80 MHz
20
200
300 MHz
20
200
500 MHz
20
200
mV rms
700 MHz
20
200
1 GHz
20
200
DC Electrical Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Units
I
CC
Power Supply Current
V
CC
e
5 5V
25
35
mA
V
OUT
Output Voltage Swing
Peak-to-Peak
0 8
1 2
1 6
V
(no load)
Note 1
``Absolute Maximum Ratings'' are those values beyond which the safety of the device cannot be guaranteed Except for ``Operating Temperature Range''
they are not meant to imply that the devices should be operated at these limits The table of ``Electrical Characteristics'' provides conditions for actual device
operation
Typical Applications
Typical Wiring Configuration
TL F 9340 3
2
Typical Applications
(Continued)
Typical Input Impedance
Reference value
e
50X
Vi (rms)
e
25 mV
V
CC
e
5V
Waveshape is TBD
TL F 9340 4
Typical Sensitivity Curve Under Nominal Conditions
TL F 9340 5
3
DS8673DS8674
Low
Power
VHFUHF
Prescalers
Physical Dimensions
inches (millimeters)
Lit
103367
Molded Dual-In-Line Package (N)
Order Number DS8673N or DS8674N
NS Package Number N08E
LIFE SUPPORT POLICY
NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION As used herein
1 Life support devices or systems are devices or
2 A critical component is any component of a life
systems which (a) are intended for surgical implant
support device or system whose failure to perform can
into the body or (b) support or sustain life and whose
be reasonably expected to cause the failure of the life
failure to perform when properly used in accordance
support device or system or to affect its safety or
with instructions for use provided in the labeling can
effectiveness
be reasonably expected to result in a significant injury
to the user
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