參數資料
型號： 74F257A
廠商： NXP Semiconductors N.V.
英文描述： Quad 2-line to 1-line selector/multiplexer, non-inverting 3-State
中文描述： 四2線1線選擇器/復用器，非反相三態(tài)
文件頁數： 5/10頁
文件大?。?/td> 79K
代理商： 74F257A
Philips Semiconductors
Product specification
74F257A
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
1995 Mar 31
5
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS
1
LIMITS
UNIT
MIN
TYP
2
MAX
V
OH
High level output voltage
High-level output voltage
V
= MIN, V
= MAX,
CC
V
IH
= MIN, I
OH
= MAX
±
10%V
CC
±
5%V
CC
±
10%V
CC
±
5%V
CC
2.4
V
IL
,
2.7
3.3
V
V
OL
Low level output voltage
Low-level output voltage
V
= MIN, V
= MAX,
CC
V
IH
= MIN, I
OL
= MAX
0.35
0.50
V
IL
,
0.35
0.50
V
V
IK
Input clamp voltage
V
CC
= MIN, I
I
= I
IK
–0.73
–1.2
V
I
I
Input current at maximum input voltage
V
CC
= MAX, V
I
= 7.0V
100
μ
A
I
IH
High-level input current
V
CC
= MAX, V
I
= 2.7V
20
μ
A
I
IL
Low-level input current
V
CC
= MAX, V
I
= 0.5V
–0.6
mA
I
OZH
Off state output current,
High-level voltage applied
V
CC
= MAX, V
O
= 2.7V
50
μ
A
I
OZL
Off state output current,
Low-level voltage applied
V
CC
= MAX, V
O
= 0.5V
–50
μ
A
I
OS
Short-circuit output current
3
V
CC
= MAX
-60
–150
mA
I
CCH
9.0
15.0
mA
I
CC
Supply current
4
(total)
I
CCL
V
CC
= MAX
14.5
22.0
mA
I
CCZ
15.0
23.0
mA
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V
= 5V, T
= 25
°
C.
3. Not more than one output should be shorted at a time. For testing I
OS
, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, I
OS
tests should be performed last.
4. Measure I
CC
with all outputs open and inputs grounded.
AC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST
CONDITION
T
amb
= +25
°
C
V
CC
= +5.0V
C
L
= 50pF
R
L
= 500
T
amb
= 0
°
C to +70
°
C
V
CC
= +5.0V
±
10%
C
L
= 50pF
R
L
= 500
T
amb
= –40
°
C to +85
°
C
CC
= +5.0V
±
10%
C
L
= 50pF
R
L
= 500
UNIT
MIN
TYP
MAX
MIN
MAX
MIN
MAX
t
PLH
t
PHL
Propagation delay
In to Yn
Waveform 1
3.0
2.0
4.5
3.5
6.0
5.0
3.0
2.0
7.0
6.0
3.0
2.0
7.0
7.0
ns
t
PLH
t
PHL
Propagation delay
S to Yn
Waveform 1
5.0
4.0
7.5
5.5
9.5
7.0
5.0
4.0
10.5
8.0
5.0
4.0
10.5
8.5
ns
t
PZH
t
PZL
Output Enable time
to High or Low level
Waveform 2
Waveform 3
4.5
4.5
6.5
6.0
7.5
7.5
4.5
4.5
8.5
8.5
4.5
4.5
8.5
8.5
ns
t
PHZ
t
PLZ
Output Disable time
from High or Low level
Waveform 2
Waveform 3
2.0
2.0
4.0
3.5
5.5
5.5
2.0
2.0
6.0
6.0
2.0
2.0
6.0
6.0
ns
相關PDF資料
PDF描述
74F257A Quad 2-Input Multiplexer with 3-STATE Outputs
74F257APC Quad 2-Input Multiplexer with 3-STATE Outputs
74F257ASJ Quad 2-Input Multiplexer with 3-STATE Outputs
74F258A Quad 2-line to 1-line selector/multiplexer, inverting 3-State
74F258A Quad 2-Input Multiplexer with 3-STATE Outputs
相關代理商/技術參數
參數描述
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