MC14022B

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5

Figure 1. Typical Output Source and Output Sink Characteristics Test Circuit

A

B

S1

Q7

Q6

Q5

Q4

Q3

Q2

Q1

Q0

CLOCK

CLOCK

ENABLE

RESET

EXTERNAL

POWER

SUPPLY

Output

Sink Drive

Output

Source Drive

Outputs

Clock to desired

Output

(S1 to B)

(S1 to A)

Carry

Clock to Q5

thru Q7

(S1 to B)

S1 to A

Figure 2. Typical Power Dissipation Test Circuit

Q7

Q6

Q5

Q4

Q3

Q2

Q1

Q0

CLOCK

CLOCK

ENABLE

RESET

PULSE

GENERATOR

500

µF

0.01

µF

CERAMIC

APPLICATIONS INFORMATION

Figure 3 shows a technique for extending the number of decoded output states for the MC14022B. Decoded outputs are

sequential within each stage and from stage to stage, with no dead time (except propagation delay).

Figure 3. Counter Expansion

R

C

CE

MC14022B

Q0 Q1

Q6 Q7

•••

7 DECODED

OUTPUTS

CLOCK

FIRST STAGE

INTERMEDIATE STAGES

LAST STAGE

R

C

CE

MC14022B

Q0 Q1

Q6 Q7

•••

R

C

CE

MC14022B

Q1

Q6 Q7

•••

6 DECODED

OUTPUTS

6 DECODED

OUTPUTS