1.3V

tw

Input

1.3V

3V

0 V

Figure 6-6. Voltage Waveforms, TTL-Compatible

CMOS Inputs Pulse Duration

Clock

Input

1.3V

3V

0 V

1.3V

1.3V

3V

0 V

tsu

Data

Input

th

Figure 6-7. Voltage Waveforms, TTL-Compatible

CMOS Inputs Setup and Hold Times

1.3V

Input

1.3V

3V

0 V

50%

50%

VOH

VOL

tPLH

(1)

tPHL

(1)

VOH

VOL

tPHL

(1)

tPLH

(1)

Output

Waveform 1

Output

Waveform 2

50%

50%

(1) The greater between tPLH and tPHL is the same as tpd.

Figure 6-8. Voltage Waveforms, Propagation Delays for TTL-Compatible Inputs

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CD54HC4040, CD74HC4040, CD54HCT4040, CD74HCT4040

SCHS203E – NOVEMBER 1998 – REVISED JULY 2022

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