MC74HCT161AN 데이터 시트보기 (PDF) - Motorola => Freescale

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MC74HCT161AN

Presettable Counters

Motorola => Freescale 

MC54/74HCT161A MC54/74HCT163A

TYPICAL APPLICATIONS CASCADING

Load

Inputs

Inputs

Inputs

H=Count

L=Disable

H=Count

L=Disable

Reset

Clock

Load Q0 Q1 Q2 Q3

Enable P

Enable T

Clock

Ripple

Carry

Out

Reset Q0 Q1 Q2 Q3

Outputs

Load Q0 Q1 Q2 Q3

Enable P

Enable T

Clock

Ripple

Carry

Out

Reset Q0 Q1 Q2 Q3

Outputs

Load Q0 Q1 Q2 Q3

Enable P

Enable T

Clock

Ripple

Carry

Out

Reset Q0 Q1 Q2 Q3

Outputs

To More

Significant

Stages

NOTE: When used in these cascaded configurations the clock fmax guaranteed limits may not apply. Actual performance will

depend on number of stages. This limitation is due to set–up times between Enable (port) and clock.

Figure 11. N–Bit Synchronous Counters

Load

Enable P

Enable T

Clock

Reset

Inputs

Inputs

Inputs

Load Q0 Q1 Q2 Q3

Enable P

Enable T

Clock

Ripple

Carry

Out

Reset Q0 Q1 Q2 Q3

Load Q0 Q1 Q2 Q3

Enable P

Enable T

Clock

Ripple

Carry

Out

Reset Q0 Q1 Q2 Q3

Load Q0 Q1 Q2 Q3

Enable P

Enable T

Clock

Ripple

Carry

Out

Reset Q0 Q1 Q2 Q3

Outputs

Outputs

Figure 12. Nibble Ripple Counter

Outputs

To More

Significant

Stages

High–Speed CMOS Logic Data

9

DL129 — Rev 6

MOTOROLA

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