參數(shù)資料
型號(hào)： DM74AS257
廠商： Fairchild Semiconductor Corporation
英文描述： 10-Bit Bus Transceiver With 3-State Outputs 24-SOIC -40 to 85
中文描述： 三態(tài)四2線數(shù)據(jù)選擇1 /多路復(fù)用器
文件頁(yè)數(shù)： 3/6頁(yè)
文件大?。?/td> 60K
代理商： DM74AS257
3
www.fairchildsemi.com
D
Absolute Maximum Ratings
(Note 1)
Note 1:
The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Recommended Operating Conditions
Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at V
CC
=
5V, T
A
=
25
°
C.
Symbol
Parameter
Note 2:
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
OS
.
Supply Voltage, V
CC
Input Voltage
Voltage Applied to Disabled Output
Operating Free Air Temperature Range
Storage Temperature Range
Typical
θ
JA
N Package
7V
7V
5.5V
0
°
C to
+
70
°
C
65
°
C to
+
150
°
C
75.0
°
C/W
Symbol
Parameter
Min
4.5
2
Nom
5
Max
5.5
Units
V
V
V
mA
mA
°
C
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Free Air Operating Temperature
0.8
15
48
70
0
Conditions
Min
Typ
Max
Units
V
IK
Input Clamp
Voltage
HIGH Level
V
CC
=
4.5V, I
I
=
18 mA
1.2
V
V
OH
V
CC
=
4.5V, I
OH
=
Max
I
OH
=
2 mA, V
CC
=
4.5V to 5.5V
2.4
3.2
V
Output Voltage
LOW Level
Output Voltage
V
CC
2
V
V
OL
V
CC
=
4.5V, I
OL
=
Max
0.35
0.5
V
I
I
Input Current @
V
CC
=
5.5V, V
IH
=
7V
A, B, G
0.1
mA
Max Input Voltage
Select
0.2
I
IH
HIGH Level
V
CC
=
5.5V, V
IH
=
2.7V
A, B, G
Select
Select
20
μ
A
Input Current
LOW Level
40
1
0.5
112
50
I
IL
V
CC
=
5.5V, V
IL
=
0.4V
mA
Input Current
Output Drive Current
Off-State Output Current,
All Others
I
O
(Note 2)
I
OZH
V
CC
=
5.5V, V
O
=
2.25V
V
CC
=
5.5V
V
O
=
2.7V
V
CC
=
5.5V
V
O
=
0.4V
30
mA
μ
A
HIGH Level Voltage Applied
Off-State Output Current,
LOW Level Voltage Applied
I
OZL
50
μ
A
I
CCH
Supply
Current
Supply
DM74AS257
DM74AS258
DM74AS257
Outputs HIGH
12.9
8.8
19
19.7
13.5
30.6
mA
mA
mA
I
CCL
V
CC
=
5.5V
Outputs Open
Outputs LOW
Current
Supply
Current
DM74AS258
DM74AS257
DM74AS258
15.8
19.7
15.5
24.6
31.9
25.2
mA
mA
mA
I
CCZ
Outputs Disabled
相關(guān)PDF資料
PDF描述
DM74AS257M 10-Bit Bus Transceiver With 3-State Outputs 24-SOIC -40 to 85
DM74AS257N 3-STATE Quad 1 of 2 Line Data Selector/Multiplexers
DM74AS258M 10-Bit Bus Transceiver With 3-State Outputs 24-SOIC -40 to 85
DM74AS258N 10-Bit Bus Transceiver With 3-State Outputs 24-SOIC -40 to 85
DM74AS257MX 2-Input Digital Multiplexer
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DM74AS257M 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 3-STATE Qd Sel/Mult 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
DM74AS257M_Q 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 3-STATE Qd Sel/Mult 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
DM74AS257MX 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 3-STATE Qd Sel/Mult 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
DM74AS257N 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 3-STATE Qd Sel/Mult 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
DM74AS257N_Q 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 3-STATE Qd Sel/Mult 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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