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SN74HCS72

SCLS801 – FEBRUARY 2020

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Feature Description (continued)

8.3.3 Positive and Negative Clamping Diodes

The inputs and outputs to this device have both positive and negative clamping diodes as depicted in Figure 11.

CAUTION

Voltages beyond the values specified in the Absolute Maximum Ratings table can

cause damage to the device. The input negative-voltage and output voltage ratings

may be exceeded if the input and output clamp-current ratings are observed.

Figure 11. Electrical Placement of Clamping Diodes for Each Input and Output

8.4 Device Functional Modes

Table 1 lists the functional modes of the SN74HCS72.

(1)

This configuration is nonstable; that is, it does not persist when PRE or CLR returns to its inactive

(high) level.

Table 1. Function Table

INPUTS

OUTPUTS

PRE

CLR

CLK

D

Q

Q

L

H

X

X

H

L

H

L

X

X

L

H

L

L

X

X

H

H

↓

H

H

L

H

H

↓

L

L

H

H

H

L

X

H

H

H

X