參數(shù)資料
型號(hào)： 74F244SJX
英文描述： Dual 4-Bit Non-Inverting Buffer/Driver
中文描述： 雙4位非反向緩沖器/驅(qū)動(dòng)器
文件頁(yè)數(shù)： 7/12頁(yè)
文件大?。?/td> 147K
代理商： 74F244SJX
Philips Semiconductors
Product specification
74F240/74F240A/
74F241/74F241A
Buffers
7
AC ELECTRICAL CHARACTERISTICS
LIMITS
T
amb
= +25
°
C
V
CC
= +5.0V
C
L
= 50pF, R
L
= 500
MIN
TYP
T
amb
= 0
°
C to +70
°
C
V
CC
= +5.0V
±
10%
C
L
= 50pF, R
L
= 500
MIN
SYMBOL
PARAMETER
TEST
UNIT
CONDITION
MAX
MAX
t
PLH
t
PHL
Propagation delay
Ian, Ibn to Yn
Waveform 1
3.0
2.0
4.5
3.0
6.5
4.5
3.0
2.0
7.5
5.0
ns
t
PZH
t
PZL
Output enable time
to high or low level
74F240
Waveform 3
Waveform 4
3.0
4.5
5.0
6.5
7.5
8.5
3.0
4.0
9.0
10.0
ns
t
PHZ
t
PLZ
Output disable time
from high or low level
Waveform 3
Waveform 4
3.0
3.0
5.5
5.0
7.0
7.0
3.0
3.0
7.5
7.5
ns
t
PLH
t
PHL
Propagation delay
Ian, Ibn to Yn
Waveform 1
2.5
2.0
4.0
3.5
5.5
5.5
2.0
2.0
6.5
6.0
ns
t
PZH
t
PZL
Output enable time
to high or low level
74F240A
Waveform 3
Waveform 4
2.0
3.5
4.0
5.0
6.5
7.5
2.0
3.0
7.0
8.5
ns
t
PHZ
t
PLZ
Output disable time
from high or low level
Waveform 3
Waveform 4
2.0
1.5
3.5
2.5
6.0
5.0
1.5
1.0
6.5
5.5
ns
t
sk(0)
t
PLH
t
PHL
Output skew
1, 2
Waveform 5
1.5
2.0
ns
Propagation delay
Ian, Ibn to Yn
Waveform 2
2.5
2.5
4.0
4.0
5.2
5.2
2.5
2.5
6.2
6.5
ns
t
PZH
t
PZL
Output enable time
to high or low level
74F241
Waveform 3
Waveform 4
2.0
2.0
4.0
5.0
5.7
7.0
2.0
2.0
6.7
8.0
ns
t
PHZ
t
PLZ
Output disable time
from high or low level
Waveform 3
Waveform 4
2.0
2.0
4.0
4.0
6.0
6.0
2.0
2.0
7.0
7.0
ns
t
PLH
t
PHL
Propagation delay
Ian, Ibn to Yn
Waveform 2
2.5
2.5
4.5
4.5
5.8
5.8
2.5
2.5
6.5
6.5
ns
t
PZH
t
PZL
Output enable time
to high or low level
74F241A
Waveform 3
Waveform 4
2.5
3.5
4.5
5.0
6.0
7.0
2.0
3.0
6.7
8.0
ns
t
PHZ
t
PLZ
Output disable time
from high or low level
Waveform 3
Waveform 4
2.0
1.5
4.0
3.5
6.0
5.5
1.5
1.0
6.5
6.0
ns
t
sk(0)
Notes to AC electrical characteristics
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.,).
Output skew
1, 2
Waveform 5
1.5
2.0
ns
AC WAVEFORMS
Ian, Ibn
V
M
V
M
V
M
V
M
t
PLH
t
PHL
Yn
SF00328
Waveform 1. Propagation delay for inverting outputs
Ian, Ibn
V
M
V
M
V
M
V
M
t
PHL
t
PLH
Yn
SF00329
Waveform 2. Propagation delay for non–invertIng outputs
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