74ALS377 datasheet(5/10 Pages) PHILIPS

5 / 10 page

Philips Semiconductors

Product specification

74ALS377

Octal D flip-flop with enable

1991 Feb 08

AC ELECTRICAL CHARACTERISTICS

LIMITS

SYMBOL

PARAMETER

TEST CONDITION

Tamb = 0°C to +70°C

VCC = +5.0V ± 10%

CL = 50pF, RL = 500Ω

UNIT

MIN

MAX

fMAX

Maximum clock frequency

Waveform 1

MHz

tPLH

tPHL

Propagation delay

CP to Qn

Waveform 1

2.0

3.0

8.0

11.0

AC SETUP REQUIREMENTS

LIMITS

SYMBOL

PARAMETER

TEST CONDITION

Tamb = 0°C to +70°C

VCC = +5.0V ± 10%

CL = 50pF, RL = 500Ω

UNIT

MIN

MAX

tsu(H)

tsu(L)

Setup time, High or Low

Dn to CP

Waveform 2

5.0

th(H)

th(L)

Hold time, High or Low

Dn to CP

Waveform 2

0.0

tsu(H)

tsu(L)

Setup time, High or Low

E to CP

Waveform 2

1.0

th(H)

th(L)

Hold time, High or Low

E to CP

Waveform 2

3.0

tw(H)

tw(L)

CP pulse width,

High or Low

Waveform 1

6.0

8.0

AC WAVEFORMS

For all waveforms, VM = 1.3V.

The shaded areas indicate when the input is permitted to change for predictable output performance.

tw(H)

1/fmax

tPLH

tw(L)

tPHL

SF00294

Waveform 1.

Propagation Delay for Clock Input to Output,

Clock Pulse Width, and Maximum Clock Frequency

SC00076

tsu

tsu(L)

th = 0

tsu(H)

th = 0

Waveform 2.

Data and Enable Setup and Hold Times

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