Philips Semiconductors
Product specification
Octal buffers (3-State)
74F244/74F244B
AC ELECTRICAL CHARACTERISTICS FOR 74F244
A PORT LIMITS
T
amb
= +25
°
C
SYMBOL
PARAMETER
TEST
CONDITION
V
CC
= +5.0V
C
L
= 50pF,
R
L
= 500Ω
MIN
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation delay
Ian, Ibn to Yn
Output enable time
to high or low
Output disable time
from high or low
Waveform 1
Waveform 2
Waveform 4
Waveform 2
Waveform 4
2.5
2.5
2.0
2.0
1.5
1.5
TYP
4.0
4.0
4.3
5.0
2.5
2.5
MAX
5.2
5.2
5.7
7.0
5.5
5.5
T
amb
= 0
°
C to +70
°
C
V
CC
= +5.0V
±
10%
C
L
= 50pF,
R
L
= 500Ω
MIN
2.0
2.0
2.0
2.0
1.0
1.0
MAX
6.2
6.5
6.7
8.0
6.0
5.5
T
amb
= -40
°
C to +85
°
C
V
CC
= +5.0V
±
10%
C
L
= 50pF,
R
L
= 500Ω
MIN
1.5
2.0
2.0
2.0
1.0
1.0
MAX
7.0
7.0
8.0
8.5
6.0
5.5
ns
ns
ns
UNIT
AC ELECTRICAL CHARACTERISTICS FOR 74F244B
LIMITS
T
amb
= +25
°
C
SYMBOL
PARAMETER
TEST
CONDITION
V
CC
= +5.0V
C
L
= 50pF, R
L
= 500Ω
MIN
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
sk(0)
Propagation delay
Ian, Ibn to Yn
Output enable time
to high or low level
Output disable time
from high or low level
Output skew
1, 2
Waveform 1
Waveform 2
Waveform 4
Waveform 2
Waveform 4
Waveform 3
2.5
2.5
2.0
3.0
1.5
1.5
TYP
4.5
4.5
4.0
5.5
2.5
2.5
MAX
5.7
6.0
6.0
7.5
5.5
5.5
1.5
V
CC
= +5.0V
±
10%
C
L
= 50pF, R
L
= 500Ω
MIN
2.0
2.5
2.0
3.0
1.0
1.0
MAX
6.2
6.5
6.5
8.0
6.0
5.5
2.0
ns
ns
ns
ns
T
amb
= 0
°
C to +70
°
C
UNIT
NOTES:
1. |t
PN
actual - t
PM
actual| for any output compared to any other output where N and M are either LH or HL.
2. Skew times are valid only under same test conditions (temperature, V
CC
, loading, etc.,).
1994 Dec 5
6
PHILIPS [ NXP SEMICONDUCTORS ]
