MC14541B

http://onsemi.com

4

EXPANDED BLOCK DIAGRAM

A12

B13

5

AUTO RESET

OSC

RESET

C

8–STAGE

COUNTER

RESET

POWER–ON

RESET

6

MASTER RESET

C 8–STAGE

COUNTER

RESET

1 OF 4

MUX

10

MODE

9

Q/Q

SELECT

8Q

FREQUENCY SELECTION TABLE

A

B

Number of

Counter Stages

n

Count

0

0

13

8192

0

1

10

1024

1

0

8

256

1

1

16

65536

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

After Reset

Output Initially High

After Reset

Mode,

10

Single Cycle Mode

Recycle Mode

Figure 3. Oscillator Circuit Using RC Configuration

3

21

TO CLOCK

CIRCUIT

INTERNAL

RESET