MC14541B(2000) Ver la hoja de datos (PDF) - ON Semiconductor

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MC14541B
(Rev.:2000)

Programmable Timer

ON Semiconductor 

MC14541B

EXPANDED BLOCK DIAGRAM

A 12

B 13

1 OF 4

MUX

8Q

Rtc 1

Ctc 2

OSC

C

8–STAGE

COUNTER

28

210 213 216

C 8–STAGE

RS 3 RESET

RESET

COUNTER

RESET

AUTO RESET

5

POWER–ON

RESET

VDD = PIN 14

VSS = PIN 7

6

MASTER RESET

FREQUENCY SELECTION TABLE

Number of

Counter Stages Count

A

B

n

2n

0

0

13

8192

0

1

10

1024

1

0

8

256

1

1

16

65536

10

MODE

9

Q/Q

SELECT

TRUTH TABLE

State

Pin

0

1

Auto Reset, 5 Auto Reset

Operating

Auto Reset Disabled

Master Reset, 6 Timer Operational Master Reset On

Q / Q,

9 Output Initially Low Output Initially High

After Reset

After Reset

Mode,

10 Single Cycle Mode Recycle Mode

3

TO CLOCK

CIRCUIT

INTERNAL

RESET

RS

2

1

Ctc

RTC

Figure 3. Oscillator Circuit Using RC Configuration

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4

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