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CD4541B 数据表(PDF) 2 Page - Texas Instruments

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部件名 CD4541B
功能描述  CMOS PROGRAMMABLE TIMER HIGH VOLTAGE TYPES(20V RATING)
PDF  9 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

CD4541B 数据表(HTML) 2 Page - Texas Instruments

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background image
2
Functional Diagram
Functional Block Diagram
12
13
1
2
3
5
6
10
9
A
B
RTC
CTC
RS
AR
MR
MODE
Q/Q
SELECT
8
Q
VDD = PIN 14
VSS = PIN 7
N
P
N
P
12
13
†A †B
8-STAGE
COUNTER
1 OF 3
MUX
OSC
3
2
1
†RS
†CTC
†RTC
R
R
PWR ON
RESET
6
5
MANUAL RESET
†
R
210
213
216
OR
28
8
Q
R
10
†MODE
VDD = 14
VSS = 7
NC = 4, 11
9
†Q/Q SELECT
VSS
VDD
8-STAGE
COUNTER
† All inputs are protected by CMOS Protection Network.
FIGURE 1.
FREQUENCY SELECTION TABLE
AB
NO. OF
STAGES N
COUNT 2N
0
0
13
8192
0
1
10
1024
108
256
1
1
16
65536
TRUTH TABLE
PIN
STATE
01
5
Auto Reset On
Auto Reset Disable
6
Master Reset Off
Master Reset On
9
Output Initially Low After
Reset (Q)
Output Initially High After
Reset (Q)
10
Single Transition Mode
Recycle Mode
FIGURE 2. RC OSCILLATOR CIRCUIT
RS
3
CTC
RTC
2
1
INTERNAL
RESET
TO CLOCK
CKT
CD4541B



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