MC14536 ONSEMI [ON Semiconductor], MC14536 Datasheet - Page 13

• Manufacturer Part Number: MC14536
• Description: Programmable Timer
• Manufacturer: ONSEMI [ON Semiconductor]

NOTE: This circuit is designed to use the on–chip oscillation function. The oscillator frequency is deter-
PULSE
DECODE OUT
GEN.
mined by the external R and C components. When power is first applied to the device, Decode Out
initializes to a high state. Because this output is tied directly to the Osc–Inh input, the oscillator is
disabled. This puts the device in a low–current standby condition. The rising edge of the Reset pulse
will cause the output to go low. This in turn causes Osc–Inh to go low. However, while Reset is high,
the oscillator is still disabled (i.e.: standy condition). After Reset goes low, the output remains low
for 2
Figure 11. Time Interval Configuration Using On–Chip RC Oscillator and
RESET
OUT 1
OUT 2
n
/2 of the oscillator’s period. After the part times out, the output again goes high.
POWER UP
Reset Input to Initiate Time Interval
10
12
14
15
11
6
9
2
1
7
3
(Divide–by–2 Configured)
8–BYPASS
A
B
C
D
RESET
SET
CLOCK INH
MONO–IN
CLOCK INH
IN
1
http://onsemi.com
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MC14536B
13
V
V
+V
DD
SS
16
8
DECODE OUT
OUT 1
OUT 2
13
4
5
C
R
R
S
TC
f osc
R
R
C
F
s
= Hz
= Ohms
= FARADS
^
R
tc
2.3 R tc C
1