U880B
TELEFUNKEN Semiconductors
Rev. A1, 22-Apr-96
1 (4)
Double Flasher
Description
The bipolar circuit, U880B, is designed as a double flasher for wide range of applications. It has polarity and short-cir-
cuit protected stages for timely coupled outputs.
Features
D Integrated oscillator
D f
nominal
= 3.3 Hz
D Supply voltage range: 4.75 to 20.4 V
D Polarity protected
D Two protected power stages
D Output current, 55 mA nominal
Applications
D Toys
D Roboter
D LED switching
Case: TO 50
Limitation
Supply
V On
R
T frequency
R divider
Oscillator
R
Output
logic
Temperature protection
Q
2
Q
1
3
1
4
2
V
S
+V
S
95 9962
Figure 1. Block diagram with application
Pin Description
Pin
Symbol
Function
Pin 1
O
1
Output O
1
Pin 3
O
2
Output O
2
Pin
Symbol
Function
Pin 2
V
S
Supply, GND
Pin 4
V
S
Supply
U880B
TELEFUNKEN Semiconductors
Rev. A1, 22-Apr-96
2 (4)
Absolute Maximum Ratings
Reference point Pin 2, unless otherwise specified
Parameters
Symbol
Value
Unit
Supply current
Pin 4
I
S
30
mA
Peak supply current t
10
ms
Pin 4
I
S
150
mA
Supply voltage
Pin 4
V
S
20.4
V
Output stage
Pin 1, 3
V
O
20.4
V
Peak current
t
1 ms; P
tot
200 mW
Pin 1, 3
I
O
100
mA
I
O
150
Power dissipation
T
amb
= 45
C
P
tot
200
mW
T
amb
= 100
C
80
Storage temperature range
T
stg
40 to +125
C
Ambient temperature range
T
amb
10 to +100
C
Electrical Characteristics
Reference point Pin 2, V
S
= 9, T
amb
= 25
C, unless otherwise specified
Parameters
Test Conditions / Pin
Symbol
Min
Typ
Max
Unit
Supply current
Pin 4
V
4 min
= 4.75 V
I
S
3.2
4.9
mA
V
4
= 9.0 V
3.3
5.0
V
4 max
= 20.4 V
3.8
6.5
Supply voltage limitation
I
4
= 10 mA
Pin 4
V
4
20.8
24.2
V
Voltage monitoring
Pin 4
ONThreshold
V
4
4.2
4.75
V
OFFThreshold
V
4
3.0
V
Output stage
Switched off
V
4
3.8
V
Temperature coefficient
TC
0.025
%/K
Oscillator
Clock frequency
Pins 1 and 3
f
2.0
4.0
Hz
Temperature coefficient
TC
0.025
%/K
Voltage coefficient
T
j
= 45
C
VC
0.5
%/V
T
j
= 100
C
1.0
Output stage
Pins 1 and 3
Saturation voltage
V
4
= 6.0 V; I
o
= 25 mA
V
O
250
700
mV
Current limitation
V
4
= 8 V; V
1,3
= 7.5 V
I
O
55
80
mA
V
4
= 9 V; V
1,3
= 2.0 V
35
50
Temperature coefficient
TC
0.5
%/K
Voltage limitation
I
O
= 1 mA
V
O
20.4
24.2
V
I
O
= 30 mA
1.1
0.4
Leakage current
V
1,3
= 10 V
Pin 1, 3
I
O
20
mA
Over temperature limita-
ti
V
4
= 5 V
T
j
130
C
tion
V
4
= 9 V
j
145
U880B
TELEFUNKEN Semiconductors
Rev. A1, 22-Apr-96
4 (4)
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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