U2391B Datasheet, PDF (1/7 Pages) TEMIC Semiconductors – Quartz Controlled Pulse Generator

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 f_osc = 32.768 kHz
D Minimum operating voltage 4.5 V/1.5 mA
D Pulse width, t_p = 31.25 ms
D Power stage with current limitation:
typical 150 mA
D Tristate period selection: 1/36/60 s
y ^{D 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
w R_L 10 x V_S in Ohm
390 W
V_S = 4.75 to 14 V
+
60 s
36 s
1s
m 0.22 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 V_S
Interrupt
Divider 2⁴
2048 Hz
Figure 1. Block diagram with external circuit
96 11740
TELEFUNKEN Semiconductors
1 (7)
Rev. A1, 30-May-96