CD4541B_10 Datasheet, PDF (2/15 Pages) Texas Instruments – CMOS Programmable Timer High Voltage Types(20V Rating)

Functional Diagram
CD4541B
A ¹²
B ¹³
R_TC
C_TC
R_S
AR
1
2
3
5
MR
6
10
MODE
Q/Q ⁹
SELECT
8
Q
V_DD = PIN 14
V_SS = PIN 7
12 13
†A †B
3
†R_S
2
†C_TC
1
†R_TC
OSC
R
N
P
N
P
8-STAGE
COUNTER
R
2¹⁶
OR
2¹⁰ 2¹³ 2⁸
8-STAGE
COUNTER
R
1 OF 3
MUX
10
†MODE
R
8
Q
9
†Q/Q SELECT
V_DD
5 _{PWR ON}
RESET
6
MANUAL RESET†
V_DD = 14
V_SS = 7 NC = 4, 11
V_SS
† All inputs are protected by CMOS Protection Network.
FIGURE 1.
FREQUENCY SELECTION TABLE
NO. OF
A
B
STAGES N
COUNT 2^N
0
0
13
8192
0
1
10
1024
1
0
8
256
1
1
16
65536
TRUTH TABLE
STATE
PIN
0
1
5 Auto Reset On
Auto Reset Disable
6 Master Reset Off
Master Reset On
9 Output Initially Low After Output Initially High After
Reset (Q)
Reset (Q)
10 Single Transition Mode Recycle Mode
3
R_S
C_TC 2
INTERNAL
RESET
1
R_TC
TO CLOCK
CKT
FIGURE 2. RC OSCILLATOR CIRCUIT
2