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PARAMETER MEASUREMENT INFORMATION

t

h

t

su

FromOutput

UnderTest

C =30pF

(seeNote A)

L

LOADCIRCUIT

S1

2xV

CC

Open

GND

500 W

Data

Input

Timing

Input

0V

0V

0V

Input

Output

Waveform1

S1at2xV

(seeNoteB)

CC

Output

Waveform2

S1atGND

(seeNoteB)

V

OL

V

OH

0V

0V

Output

t

/t

PLH

PHL

Open

TEST

S1

Output

Control

(low-level

enabling)

V /2

CC

V /2

CC

V /2

CC

V /2

CC

V /2

CC

500 W

2xV

CC

t

/t

PLZ

PZL

GND

t

/t

PHZ

PZH

VOLTAGEWAVEFORMS

ENABLE ANDDISABLETIMES

VOLTAGEWAVEFORMS

PROPAGATIONDELAY TIMES

NOTES: A. C includesprobeandjigcapacitance.

B. Waveform1isforanoutputwithinternalconditionssuchthattheoutputislow,exceptwhendisabledbytheoutputcontrol.

Waveform2isforanoutputwithinternalconditionssuchthattheoutputishigh,exceptwhendisabledbytheoutputcontrol.

C. Allinputpulsesaresuppliedbygeneratorshavingthefollowingcharacteristics:PRR

10MHz,Z =50

,t

2ns,

t

2ns.

D. Theoutputsaremeasuredoneatatime,withonetransitionpermeasurement.

L

O

r

f

£

W

≤

≤

VOLTAGEWAVEFORMS

SETUP ANDHOLDTIMES

V

CC

V

CC

V

CC

V /2

CC

V /2

CC

V

CC

t

PZL

t

PLZ

t

PHZ

t

PZH

V

– 0.15V

OH

V

+0.15V

OL

V /2

CC

V /2

CC

V

OL

V

CC

V

OH

V /2

CC

V /2

CC

t

PLH

t

PHL

0V

t

W

Input

VOLTAGEWAVEFORMS

PULSEDURATION

V /2

CC

V /2

CC

V

CC

SN54ALVTH16374,, SN74ALVTH16374

2.5-V/3.3-V 16-BIT EDGE-TRIGGERED D-TYPE FLIP-FLOPS

WITH 3-STATE OUTPUTS

SCES068G – JUNE 1996 – REVISED NOVEMBER 2006

V

Figure 1. Load Circuit and Voltage Waveforms

10

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