ON Semiconductor MC14541B - Truth Table

MC14541B
www.onsemi.com
5
EXPANDED BLOCK DIAGRAM
A12
B13
R
tc
1
C
tc
2
R
S
3
5
AUTO RESET
OSC
RESET
C
2
8
8-STAGE
COUNTER
RESET
POWER-ON
RESET
6
MASTER RESET
2
10
2
13
2
16
C
8-STAGE
COUNTER
RESET
1 OF 4
MUX
10
MODE
9
Q/Q
SELECT
8Q
V
DD
= PIN 14
V
SS
= PIN 7
FREQUENCY SELECTION TABLE
A B
Number of
Counter Stages
n
Count
2
n
0 0 13 8192
0 1 10 1024
1 0 8 256
1 1 16 65536
TRUTH TABLE
Pin
State
0 1
Auto Reset, 5 Auto Reset
Operating
Auto Reset Disabled
Master Reset, 6 Timer Operational Master Reset On
Q/Q,9Output Initially Low
After Reset
Output Initially High
After Reset
Mode, 10 Single Cycle Mode Recycle Mode
Figure 3. Oscillator Circuit Using RC Configuration
3
R
S
R
TC
C
tc
21
TO CLOCK
CIRCUIT
INTERNAL
RESET