DM7497 datasheet(5/8 Pages) NSC

5 / 8 page

Functional Description (Continued)

Mode and Rate Select Table (Note 1)

Inputs

Clock

Outputs

Notes

S 2

Pulses

XXX

LLL

LHL

HHH

H e HIGH Voltage Level

L e LOW Voltage Level

X e Immaterial

Note 1

Numerals indicate number of pulses per cycle

Note 2

This is a simplified illustration of the clear function CP and EZ also affect the logic level of OY and OZ A LOW signal on EY will

cause OY to remain HIGH

Note 3

Each rate illustrated assumes S0–S5 are constant throughout the cycle however these illustrations in no way prohibit variable-

rate operation

Note 4

EY is used to inhibit output Y

Note 5

fout e m

fin

(32 a 8) fin

40 fin

0625 fin

Pulse Pattern Table

Output Pulse Pattern at OZ

1111111111111111111111111111111011111111111111111111111111111111

1111111111111110111111111111111111111111111111101111111111111111

1111111111111110111111111111111011111111111111101111111111111111

1111111011111111111111101111111111111110111111111111111011111111

1111111011111111111111101111111011111110111111111111111011111111

1111111011111110111111101111111111111110111111101111111011111111

1110111111101111111011111110111111101111111011111110111111101111

1110111111101111111011111110111111101111111011101110111111101111

1110111011101111111011101110111111101110111011111110111011101111

1110111011101110111011101110111111101110111011101110111011101111

1011101110111011101110111011101110111011101110111011101110111011

1011101010111011101110101011101110111010101110111011101110111011

1010101110101011101010111010101110101011111010111010101110101011

1010101010101011101010101010101110101010101010111010101010101011

010101

0101

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