參數(shù)資料
型號(hào)： CD74ACT257SM
廠商： Texas Instruments, Inc.
英文描述： Quad 2-Input Multiplexer with Three-State Outputs
中文描述： 四2輸入多路復(fù)用器與三態(tài)輸出
文件頁(yè)數(shù)： 6/14頁(yè)
文件大小： 297K
代理商： CD74ACT257SM
6
Propagation Delay,
OE to Y
AC/ACT257
t
PLZ
, t
PHZ
,
t
PZL
, t
PZH
5
4.1
-
14.6
4
-
16.1
ns
Propagation Delay,
In to Y
’AC/CD74ACT258
t
PLH
, t
PHL
5
2.4
-
8.5
2.3
-
9.3
ns
Propagation Delay,
S to Y
’AC/CD74ACT258
t
PLH
, t
PHL
5
4
-
14
3.9
-
15.4
ns
Propagation Delay,
OE to Y
’AC/CD74ACT258
t
PLZ
, t
PHZ
,
t
PZL
, t
PZH
5
4.1
-
14.6
4
-
16.1
ns
Three-State Output
Capacitance
C
O
-
-
-
15
-
-
15
pF
Input Capacitance
C
I
-
-
-
10
-
-
10
pF
Power Dissipation Capacitance
C
PD
(Note 11)
-
-
130
-
-
130
-
pF
NOTES:
8. Limits tested 100%.
9. 3.3V Min is at 3.6V, Max is at 3V.
10. 5V Min is at 5.5V, Max is at 4.5V.
11. C
PD
is used to determine the dynamic power consumption per multiplexer.
AC: P
D
= C
PD
V
CC2
f
i
+
∑
(C
L
V
CC2
f
o
)
ACT: P
D
= C
PD
V
CC2
f
i
+
∑
(C
L
V
CC2
f
o
) + V
CC
I
CC
where f
i
= input frequency, f
o
= output frequency, C
L
= output load capacitance,
V
CC
= supply voltage.
FIGURE 1. THREE-STATE PROPAGATION DELAY TIMES AND TEST CIRCUIT
Switching Specifications
Input t
r
, t
f
= 3ns, C
L
= 50pF (Worst Case)
(Continued)
PARAMETER
SYMBOL
V
CC
(V)
-40
o
C TO 85
o
C
-55
o
C TO 125
o
C
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
DUT
WITH
THREE-
STATE
OUTPUT
INPUT LEVEL
90%
V
S
10%
GND
t
f
= 3ns
t
PZL
t
PZH
t
PLZ
t
PHZ
OUTPUTS
ENABLED
OUTPUTS
DISABLED
OUTPUT: LOW
TO OFF TO LOW
OUTPUT: HIGH
TO OFF TO HIGH
OTHER
INPUTS
(TIED HIGH
OR LOW)
OUTPUT
DISABLE
C
L
50pF
500
R
L
500
R
L
OUT
V
S
0.2V
CC
V
OL
(
≠
GND)
V
OH
(
≠
V
CC
)
0.8 V
CC
V
S
GND (t
PHZ,
t
PZH
)
OPEN (t
PHL,
t
PLH
)
2 V
CC
(t
PLZ,
t
PZL
)
(OPEN DRAIN)
OUTPUTS
ENABLED
t
r
= 3ns
OUTPUT
DISABLE
FOR AC SERIES ONLY: WHEN V
CC
= 1.5V, R
L
= 1k
CD54/74AC257, CD54/74ACT257, CD74ACT258
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CD74ACT258 制造商:TI 制造商全稱:Texas Instruments 功能描述:Quad 2-Input Multiplexer with Three-State Outputs
CD74ACT258E 制造商:Harris Corporation 功能描述:
CD74ACT258EN 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Logic IC
CD74ACT258F 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Logic IC
CD74ACT258M 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Quad 2-Input Inv Mltplxr W/3-St Otpt RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時(shí)間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray
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