U847BST
TELEFUNKEN Semiconductors
Rev. A1, 05-Sep-96
1 (5)
1.3-GHz Prescaler for CATV Tuners
Technology: Bipolar
Features
D TTL output
D ESD protected
D Low current consumption
D High input sensitivity
D Slope steepness of the output level adjustable at Pin 6
Case:
8-pin dual-inline plastic
Block Diagram
88 6307
e
V
S
256
TTL
Symmetrical
Input
4
3 N.C.
8
6
7 N.C.
5
Output
Figure 1. Block diagram
U847BST
TELEFUNKEN Semiconductors
Rev. A1, 05-Sep-96
2 (5)
Absolute Maximum Ratings
Parameters
Symbol
Value
Unit
Supply voltage
Pin 4
V
S
6
V
Input-voltage range
Pins 1 and 2
V
i
0 to V
S
V
Junction temperature
T
j
125
C
Storage-temperature range
T
stg
40 to +125
C
Ambient-temperature range
T
amb
25 to +70
C
Thermal Resistance
Parameters
Symbol
Maximum
Unit
Junction ambient
R
thJA
100
K/W
Pin Connection
Pin
Function
1, 2
Input
4
Supply voltage (V
S
)
5
Output
Pin
Function
6
Open or capacitor-to-ground
8
Ground
3, 7
Not connected
Note:
In order to avoid damage, the prescaler must be handled as a MOS device.
The device is self-oscillating without input signal.
Electrical Characteristics
V
S
= 4.5 to 5.5 V, T
amb
= 0 to +70
C, unless otherwise specified
Parameters
Test Conditions / Pin
Symbol
Min.
Typ.
Max.
Unit
Supply current
V
S
= 5 V
Pin 4
I
S
35
48
mA
Input sensitivity
1)
R
G
= 50
W, f
i
= 70 MHz
Pins 1 and 2
V
i
6
10
mV
f
i
= 150 to 1000 MHz
V
i
1
5
mV
f
i
= 1300 MHz
V
i
4
20
mV
Large-signal
compatibility
1)
R
G
= 50
W
Pins 1 and 2
V
i
300
mV
Frequency range
f
imin
70
MHz
q
y
g
f
imax
1300
MHz
TTL output
Pin 5
High level
I
OH
= 0.2 mA
V
OH
3.3
V
Low level
I
OL
= 2 mA
V
OL
0.4
V
1)
RMS voltage calculated from the available power measured
U847BST
TELEFUNKEN Semiconductors
Rev. A1, 05-Sep-96
5 (5)
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances ( ODSs ).
The Montreal Protocol ( 1987 ) and its London Amendments ( 1990 ) intend to severely restrict the use of ODSs and
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban
on these substances.
TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of
continuous improvements to eliminate the use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency ( EPA ) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively.
TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain
such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized
application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,
directly or indirectly, any claim of personal damage, injury or death associated with such unintended or
unauthorized use.
TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423
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