參數(shù)資料
型號(hào)： U2391B
英文描述： Quartz Controlled Pulse Generator
中文描述： 石英控制脈沖發(fā)生器
文件頁數(shù)： 1/7頁
文件大?。?/td> 78K
代理商： U2391B
U2391B
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96
1 (7)
Quartz Controlled Pulse Generator
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
Standard quartz f
osc
= 32.768 kHz
Minimum operating voltage 4.5 V/1.5 mA
Pulse width, t
p
= 31.25 ms
Power stage with current limitation:
typical 150 mA
Tristate period selection: 1/36/60 s
Reset and disable possibility
Operation with C
counter possible
Minimum dimensions due to SO-case
33 pF, as operational time
Application
Operational time counter
Case:
SO8
Block Diagram
Selection
logic
36
1
60
Tristate
Pulse former
Programmable
divider
Switch on
monitoring
Divider 2
7
16 Hz
Divider 2
4
Oscillator
1 Hz
Divider 2
4
V
S
= 4.75 to 14 V
Start with V
S
Interrupt
Reset
Tristate
3
1
4
2
2048 Hz
6
5
32768 Hz
7
To test
+
36 s
60 s
1 s
+
0.22 F
Reset
Interrupt
8
390
R
L
10 x V
S
in Ohm
10 F
96 11740
Figure 1. Block diagram with external circuit
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