5 Parameter Measurement Information

Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators

having the following characteristics: PRR ≤ 1MHz, ZO = 50Ω, tt < 6ns.

For clock inputs, fmax is measured when the input duty cycle is 50%.

The outputs are measured one at a time with one input transition per measurement.

50%

tw

Input

50%

VCC

0 V

Figure 5-1. Voltage Waveforms, Standard CMOS

Inputs Pulse Duration

Clock

Input

50%

VCC

0 V

50%

50%

VCC

0 V

tsu

Data

Input

th

Figure 5-2. Voltage Waveforms, Standard CMOS

Inputs Setup and Hold Times

1.3V

tw

Input

1.3V

3V

0 V

Figure 5-3. 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 5-4. Voltage Waveforms, TTL-Compatible

CMOS Inputs Setup and Hold Times

CD54HC164, CD74HC164, CD54HCT164, CD74HCT164

SCHS155E – NOVEMBER 1998 – REVISED MAY 2024

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