HD74LVC2G66

Rev.3.00 Jul 07, 2005 page 8 of 11

Test Circuit (cont.)

OPEN

OPEN

TEST

S1

VTT

VTT

S1

GND

GND

t

/ t

PLH

PHL

t

/ t

ZH

HZ

t

/ t

ZL

LZ

1.8±0.15

2.5±0.2

3.3±0.3

5.0±0.5

INPUTS

2

2

2

2

∆V

VTT

500

Ω

0.15 V

0.15 V

0.3 V

0.3 V

500

Ω

500

Ω

1.0 k

Ω

Load circuit

From Output

≤ 2 ns

≤ 2 ns

≤ 2.5 ns

≤ 2.5 ns

30 pF

30 pF

50 pF

50 pF

0 V

V

OH

Input

Output

Control

Input

0 V

Output

(Waveform – A)

Output

(Waveform – B)

2. Waveform–A is for an output with internal conditions such that the output is low except

when disabled by the output control.

3. Waveform–B is for an output with internal conditions such that the output is high except

when disabled by the output control.

4. All input pulses are supplied by generators having the following characteristics:

PRR

≤ 10MHz, Zo = 50 Ω.

5. The output are measured one at a time with one transition per measurement.