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PDF U2391B Data sheet ( Hoja de datos )
| Número de pieza | U2391B | |
| Descripción | Quartz Controlled Pulse Generator | |
| Fabricantes | TEMIC Semiconductors | |
| Logotipo |  |
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Quartz Controlled Pulse Generator
U2391B
Description
The monolithic integrated bipolar circuit, U2391B, is
designed as a quartz controlled pulse generator. The
tristate input enables the selection of different pulse
period durations. The internal switch-on monitoring
achieves the start up of the IC when the power-on occurs.
The output pulse can supply a drive signal upto 150 mA,
which is short circuit protected.
Features
D Standard quartz fosc = 32.768 kHz
D Minimum operating voltage 4.5 V/1.5 mA
D Pulse width, tp = 31.25 ms
D Power stage with current limitation:
typical 150 mA
D Tristate period selection: 1/36/60 s
yD Reset and disable possibility
D Operation with C 33 pF, as operational time
counter possible
D Minimum dimensions due to SO-case
Application
Operational time counter
Case: SO8
Block Diagram
10 mF
wRL 10 x VS in Ohm
390 W
VS = 4.75 to 14 V
60 s
36 s
1s
+
m0.22 F
+
Reset
Interrupt
1
60
Tristate 36
Selection
logic
1
2
Pulse former
3
Programmable
divider
8
Switch on
monitoring
1 Hz
16 Hz
Divider 24
To test
7
Divider 27
Oscillator
6
5 32768 Hz
Reset
4
Tristate Start with VS
Interrupt
Divider 24
2048 Hz
Figure 1. Block diagram with external circuit
96 11740
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96
1 (7)
1 page  
U2391B
Applications
60 s
36 s
1s
47 W
1N4148
WR L >860
1
10 mF
2
3
0.22 mF
4
GND
VS = 4.75...14 V
8
U2391B
7
6
5
96 11815
fosc = 32768 Hz
Figure 5. Standard circuit for VS = 4.75 to 14 V, without reset and interruption
Cycle duration selected by Pin 1
Is< 6.7 mA
2.2 kW
WR L >860
1N4148
68 kW
Operation
Reset
Interrupt
1
10 mF
2
0.22 mF
BZX85
C5V1
3
4
8
U2391B
7
6
5
96 11816
fosc = 32768 Hz
GND
V S = 19.2...28.8 V
tFigure 6. VS = 24 V ± 20% with reset and interrupt switch,
Cycle time = 60 sec.
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96
5 (7)
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet U2391B.PDF ] | |
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