MC14549B datasheet(2/12 Pages) ONSEMI

Part #	MC14549B

Description	Successive Approximation Registers

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Manufacturer	ONSEMI [ON Semiconductor]

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MC14549B, MC14559B

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2

PIN ASSIGNMENT

13

14

15

16

9

10

11

12

5

4

3

2

1

8

7

6

Q0

Q1

Q2

Q3

VDD

SC

*

EOC

Q7

Q6

Q5

Q4

VSS

C

D

Sout

*For MC14549B Pin 10 is MR input.

For MC14559B Pin 10 is FF input.

SC

SC(t–1) MR MR(t–1) Clock

Action

X

None

X

1

X

Reset

1

0

Start

Conversion

1

X

0

1

Start

Conversion

1

0

Continue

Conversion

0

X

0

X

Continue

TRUTH TABLES

MC14549B

X = Don’t Care

t–1 = State at Previous Clock

SC

SC(t–1) EOC Clock

Action

X

None

1

0

Start

Conversion

X

1

0

Continue

Conversion

0

Continue

Conversion

0

X

1

Retain

Conversion

Result

1

X

1

Start

Conversion

MC14559B

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