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參數(shù)資料
| 型號： | 74LV244PWDH |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通用總線功能 |
| 英文描述： | Octal buffer/line driver 3-State |
| 中文描述： | LV/LV-A/LVX/H SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDSO20 |
| 封裝： | PLASTIC, SOT-360, TSSOP-20 |
| 文件頁數(shù)： | 6/12頁 |
| 文件大小： | 114K |
| 代理商： | 74LV244PWDH |
Philips Semiconductors
Product specification
74LV244
Octal buffer/line driver (3-State)
1998 May 20
6
AC CHARACTERISTICS
GND = 0V; t
r
= t
f
≤
2.5ns; C
L
= 50pF; R
L
=1K
CONDITION
LIMITS
SYMBOL
PARAMETER
WAVEFORM
–40 to +85
°
C
–40 to +125
°
C
UNIT
V
CC
(V)
MIN
TYP
1
MAX
MIN
MAX
1.2
50
Propagation delay
Pro agation delay
1A
n
to 1Y
n
;
2A to 2Y
n
2.0
17
24
31
t
PHL/
t
PLH
Figures 1, 2
2.7
13
17
23
ns
3.0 to 3.6
9
2
14
18
4.5 to 5.5
12
15
1.2
65
3-State output enable time
3-State out ut enable time
1OE to 1Y
n
;
2OE to 2Y
n
2.0
22
39
49
t
PZH/
t
PZL
Figures 2, 3
2.7
16
29
36
ns
3.0 to 3.6
12
2
23
29
4.5 to 5.5
19
24
1.2
60
3-State output disable time
3-State out ut disable time
1OE to 1Y
n
;
2OE to 2Y
n
2.0
22
34
43
t
PHZ/
t
PLZ
Figures 2, 3
2.7
17
24
32
ns
3.0 to 3.6
13
2
21
26
4.5 to 5.5
16
19
NOTES:
1. Unless otherwise stated, all typical values are measured at T
amb
= 25
°
C.
2. Typical values are measured at V
CC
= 3.3 V.
AC WAVEFORMS
V
M
= 1.5 V at V
CC
≥
2.7 V and
≤
3.6 V
V
M
= 0.5
×
V
CC
at V
CC
<
2.7 V and
≥
4.5 V
V
OL
and V
OH
are the typical output voltage drop that occur with the
output load.
V
X
= V
OL
+ 0.3 V at V
CC
≥
2.7 V and
≤
3.6 V
V
X
= V
OL
+ 0.1
×
V
CC
at V
CC
<
2.7 V and
≥
4.5 V
V
Y
= V
OH
– 0.3 V at V
CC
≥
2.7V and
≤
3.6 V
V
Y
= V
OH
– 0.1
×
V
CC
at V
CC
<
2.7 V and
≥
4.5 V
SV00617
V
M
1A
, 2A
n
INPUTS
1Y
, 2Y
n
OUTPUT
V
M
t
PLH
t
PHL
GND
V
OL
V
I
V
OH
Figure 1. Input (1A
n
, 2A
n
) to output (1Y
n
, 2Y
n
)
propagation delays.
SV00623
outputs
disabled
outputs
enabled
outputs
enabled
t
PHZ
t
PZH
t
PZL
t
PLZ
Q
OFF-to-HIGH
Q
OFF-to-LOW
V
M
V
M
OE INPUT
V
X
V
OL
V
OH
V
Y
GND
GND
V
CC
V
I
V
M
n
OUTPUT
n
OUTPUT
Figure 2. 3-State enable and disable times.
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