FN2142 Rev 2.00

Page 8 of 9

September 1995

HCS74MS

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AC Timing Diagrams and Load Circuit

Pulse Width, Setup, Hold Timing Diagram

Positive Edge Trigger and Load Circuit

AC VOLTAGE LEVELS

PARAMETER

HCS

UNITS

VCC

4.50

V

VIH

4.50

V

VS

2.25

V

VIL

0

V

GND

0

V

VS

INPUT

OUTPUT

OUTPUT

TTHL

80%

20%

80%

20%

VIH

VIL

VOH

VOL

VOH

VOL

TPLH

TPHL

VS

TTLH

DUT

TEST

CL

RL

POINT

CL = 50pF

RL = 500



PULSE WIDTH, SETUP, HOLD VOLTAGE LEVELS

PARAMETER

HCS

UNITS

VCC

4.50

V

VIH

4.50

V

VS

2.25

V

VIL

0

V

GND

0

V

INPUT

VIL

VIL

VS

VIH

CP INPUT

VIH

TH = Hold Time

TSU = Setup Time

TW = Pulse Width

TW

TSU

TH

TW

DUT

TEST

CL

RL

POINT

CL = 50pF

RL = 500

