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參數(shù)資料
| 型號： | 74LV257PWDH |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通用總線功能 |
| 英文描述： | Quad 2-input multiplexer 3-State |
| 中文描述： | LV/LV-A/LVX/H SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16 |
| 文件頁數(shù)： | 6/12頁 |
| 文件大?。?/td> | 114K |
| 代理商： | 74LV257PWDH |
Philips Semiconductors
Product specification
74LV257
Quad 2-input multiplexer (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
TYP
1
–40 to +125
°
C
MIN
UNIT
V
CC
(V)
1.2
MIN
MAX
MAX
65
t
PHL/
PLH
t
Propagation delay
nl
0
to nY
nl
1
to nY
Figure 1
2.0
22
43
51
ns
2.7
16
31
38
3.0 to 3.6
1.2
2.0
2.7
3.0 to 3.6
1.2
2.0
2.7
3.0 to 3.6
1.2
2.0
2.7
3.0 to 3.6
12
2
85
29
21
16
2
60
20
15
11
2
65
24
18
14
2
25
30
t
PHL/
t
PLH
Propagation delay
S to nY
Figure 1
56
41
33
66
49
39
ns
y
t
PZH/
t
PZL
3-State output enable time
OE to nY
Figure 2
39
29
23
46
34
27
ns
t
PHZ/
PLZ
t
3-State output disable time
OE to nY
Figure 2
40
32
26
49
37
30
ns
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
= 0.5
×
V
CC
at V
CC
<
2.7 V
V
M
= 1.5 V at V
CC
≥
2.7 V
V
X
= V
OL
+ 0.3 V at V
CC
≥
2.7 V
V
X
= V
OL
+ 0.1
×
V
CC
at V
CC
<
2.7 V
V
Y
= V
OH
– 0.3 V at V
CC
≥
2.7V
V
Y
= V
OH
– 0.1
×
V
CC
at V
CC
<
2.7 V
V
OL
and V
OH
are the typical output voltage drop that occur with the
output load.
SV00641
V
M
S, nI
, nI
1
INPUTS
nY OUTPUT
V
M
t
PLH
t
PHL
GND
V
CC
V
OL
V
OH
Figure 1. Input (S, nl
0
, nl
1
) to output (nY) propagation delays.
SV00642
outputs
disabled
outputs
enabled
outputs
enabled
t
PHZ
t
PZH
t
PZL
t
PLZ
OUTPUT
HIGH-to-OFF
OFF-to-HIGH
OUTPUT
LOW-to-OFF
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
Figure 2.
3-State enable and disable times.
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