
Philips Semiconductors
Product specification
74ALS651/74ALS651-1
74ALS652/74ALS652-1
Transceiver/register
1991 Feb 08
9
AC WAVEFORMS
For all waveforms, V
M
= 1.3V.
The shaded areas indicate when the input is permitted to change for predictable output performance.
CPBA
or
CPAB
V
M
V
M
V
M
t
w
(H)
1/f
max
V
M
V
M
t
PLH
t
w
(L)
t
PHL
An or Bn
SF00394
Waveform 1.
Clock Pulse Width, and Maximum Clock Frequency
Propagation Delay for Clock Input to Output,
SF00395
V
M
V
M
V
M
V
M
Bn or An
An or Bn
t
PLH
t
PHL
SBA or SAB
An or Bn
Waveform 2.
Propagation Delay for An to Bn or Bn to An
and SAB or SBA to An or Bn
V
M
V
M
V
M
V
M
t
PHL
t
PLH
An or Bn
Bn or An
SBA or SAB
An or Bn
SF00396
Waveform 3.
Propagation Delay for An to Bn or Bn to An
and SAB or SBA to An or Bn
V
M
V
M
V
M
V
M
V
M
V
M
t
su
(L)
t
h
(L)
t
su
(H)
t
h
(H)
An or Bn
CPBA
or
CPAB
SF00397
Waveform 4.
Data Setup Time and Hold Times
V
M
V
M
V
M
t
su
(L)
t
h
(L)
OEBA
OEAB
SF00410
Waveform 5.
OEBA to OEAB Setup Time and Hold Times
V
M
V
M
V
M
t
su
(H)
t
h
(H)
OEBA
OEAB
SF00411
Waveform 6.
OEAB to OEBA Setup Time and Hold Times
SF00412
V
M
V
M
V
M
t
PHZ
t
PZH
V
OH
-0.3V
0V
An or Bn
OEBA
OEAB
Waveform 7.
3-State Output Enable Time to High Level and
Output Disable Time from High Level
SF00413
V
M
V
M
V
M
t
PLZ
t
PZL
V
OL
+0.3V
An or Bn
OEBA
OEAB
Waveform 8.
3-State Output Enable Time to Low Level and
Output Disable Time from Low Level