From Output

Under Test

(see Note A)

LOAD CIRCUIT

S1

Open

GND

R

R

L

L

Data Input

Timing Input

0 V

0 V

0 V

t

Input

w

VOLTAGE WAVEFORMS

SETUP AND HOLD TIMES

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

INVERTING AND NONINVERTING OUTPUTS

VOLTAGE WAVEFORMS

PULSE DURATION

0 V

Input

Output

Waveform 1

(see Note B)

Output

Waveform 2

S1 at GND

(see Note B)

0 V

≈0 V

VOLTAGE WAVEFORMS

ENABLE AND DISABLE TIMES

LOW- AND HIGH-LEVEL ENABLING

Output

Output

Open

GND

TEST

S1

B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.

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

H. All parameters and waveforms are not applicable to all devices.

Output

Control

V

V

V

V

V

V

V

V

V

V

V

V

V

M

M

M

M

M

M

M

M

M

M

M

M

I

1.8 V ± 0.15 V

2.5 V ± 0.2 V

2.7 V

3.3 V ± 0.3 V

1 kΩ

500 Ω

500 Ω

500 Ω

6 V

6 V

30 pF

30 pF

50 pF

50 pF

0.15 V

0.15 V

0.3 V

0.3 V

V

V

∆

CC

2.7 V

2.7 V

V

V

I

1.5 V

1.5 V

t /t

r f

≤2 ns

≤2 ns

≤2.5 ns

≤2.5 ns

INPUTS

SN74LVC125A

SCAS290Q – JANUARY 1993 – REVISED JANUARY 2015

www.ti.com

8 Parameter Measurement Information

Figure 3. Load Circuit and Voltage Waveforms

8

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