Philips Semiconductors

Product specification

74ALS373/74ALS374

Latch/flip-flop

1991 Feb 08

8

AC WAVEFORMS

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

CP VM

VM

VM

tw(H)

1/fmax

VM

VM

tPHL

tw(L)

tPLH

Qn

SF00258

Waveform 1.

Propagation Delay for Clock Input to Output,

Clock Pulse Widths, and Maximum Clock Frequency

tPHL

EVM

VM

VM

tw(H)

VM

VM

Qn

tPLH

SF00259

Waveform 2.

Propagation Delay for Enable to Output and

Enable Pulse Width

Dn

VM

VM

VM

VM

tPHL

tPLH

Qn

SF00260

Waveform 3.

Propagation Delay for Data to Output

VM

VM

VM

VM

VM

VM

tsu(L)

th(L)

tsu(H)

th(H)

E

Dn

SF00261

Waveform 4.

Data Setup Time and Hold Times

VM

VM

VM

VM

VM

VM

tsu(L)

th(L)

tsu(H)

th(H)

CP

Dn

SF00262

Waveform 5.

Data Setup Time and Hold Times

OE

Qn

0V

SC00099

Waveform 6.

3-State Output Enable Time to High Level and

Output Disable Time from High Level

OE

Qn

SC00100

3.5V

Waveform 7.

3-State Output Enable Time to Low Level and

Output Disable Time from Low Level