Philips Semiconductors
Product specification
4-bit binary counter
74ALS161B/74ALS163B
AC ELECTRICAL CHARACTERISTICS
LIMITS
T
V
= 0°C to +70°C
= +5.0V ± 10%
amb
CC
SYMBOL
PARAMETER
TEST CONDITION
UNIT
C = 50pF, R = 500Ω
L
L
MIN
100
MAX
f
Maximum clock frequency
Waveform 1
Waveform 1
MHz
ns
MAX
t
t
Propagation delay
CP to Qn
4.0
6.0
13.0
16.0
PLH
PHL
t
t
Propagation delay
CP to TC
6.0
8.0
16.0
16.0
PLH
PHL
Waveform 1
Waveform 2
Waveform 3
Waveform 3
ns
ns
ns
ns
t
t
Propagation delay
CET to TC
3.0
3.0
10.0
10.0
PLH
PHL
Propagation delay
MR to Qn
t
74ALS161B
74ALS163B
8.0
15.0
19.0
PHL
PHL
Propagation delay
MR to TC
t
11.0
AC ELECTRICAL CHARACTERISTICS
LIMITS
T
V
= 0°C to +70°C
= +5.0V ± 10%
amb
CC
SYMBOL
PARAMETER
TEST CONDITION
UNIT
C = 50pF, R = 500Ω
L
L
MIN
MAX
t
t
(H)
Setup time, High or Low
Dn to CP
8.0
8.0
su
Waveform 6
Waveform 6
Waveform 5 or 6
Waveform 6
Waveform 4
Waveform 4
Waveform 1
Waveform 1
ns
ns
ns
ns
ns
ns
ns
ns
(L)
su
t (H)
Hold time, High or Low
Dn to CP
0.0
0.0
h
h
t (L)
t
su
(H)
Setup time, High or Low
PE or SR to CP
10.0
10.0
t
(L)
su
t (H)
Hold time, High or Low
PE or SR to CP
0.0
0.0
h
h
t (L)
t
su
(H)
Setup time, High or Low
CET or CEP to CP
10.0
10.0
t
(L)
su
t (H)
Hold time, High or Low
CET or CEP to CP
0.0
0.0
h
h
t (L)
t (H)
t (L)
CP Pulse width (load),
High or Low
5.0
5.0
w
w
t (H)
t (L)
CP Pulse width (count),
High or Low
5.0
5.0
w
w
t (L)
MR or SR Pulse width, Low
Waveform 3
Waveform 3
5.0
ns
ns
w
t
Recovery time, CR or SR to CP
10.0
REC
8
1991 Feb 08