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參數(shù)資料
| 型號： | SN74LS242JD |
| 英文描述： | 4-Bit Bus Transceiver |
| 中文描述： | 4位總線收發(fā)器 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大?。?/td> | 163K |
| 代理商： | SN74LS242JD |
Absolute Maximum Ratings
(Note)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range
DM54LS and 54LS
DM74LS
b
55
§
C to
a
125
§
C
0
§
C to
a
70
§
C
b
65
§
C to
a
150
§
C
Storage Temperature Range
Note: The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed. The device should not be operated at these limits. The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings.
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation.
Recommended Operating Conditions
Symbol
Parameter
DM54LS257B
DM74LS257B
Units
Min
Nom
Max
Min
Nom
Max
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Supply Voltage
4.5
5
5.5
4.75
5
5.25
V
High Level Input Voltage
2
2
V
Low Level Input Voltage
0.7
0.8
V
High Level Output Current
b
1
b
2.6
mA
Low Level Output Current
12
24
mA
§
C
Free Air Operating Temperature
b
55
125
0
70
’LS257B Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 1)
V
I
V
OH
Input Clamp Voltage
V
CC
e
Min, I
I
e b
18 mA
V
CC
e
Min, I
OH
e
Max
V
IL
e
Max, V
IH
e
Min
b
1.5
V
High Level Output
Voltage
DM54
2.4
3.4
V
DM74
2.4
3.1
V
OL
Low Level Output
Voltage
V
CC
e
Min, I
OL
e
Max
V
IL
e
Max, V
IH
e
Min
DM54
0.25
0.4
DM74
0.35
0.5
V
I
OL
e
12 mA, V
CC
e
Min
V
CC
e
Max,
V
I
e
7V
DM74
0.25
0.4
I
I
Input Current
@
Max
Input Voltage
Select
0.2
mA
Other
0.1
I
IH
High Level Input
Current
V
CC
e
Max,
V
I
e
2.7V
Select
40
m
A
Other
20
I
IL
Low Level Input
Current
V
CC
e
Max,
V
I
e
0.4V
Select
b
0.8
b
0.4
mA
Other
I
OZH
Off-State Output Current
with High Level Output
Voltage Applied
V
CC
e
Max, V
O
e
2.7V
V
IH
e
Min, V
IL
e
Max
20
m
A
I
OZL
Off-State Output Current
with Low Level Output
Voltage Applied
V
CC
e
Max, V
O
e
0.4V
V
IH
e
Min, V
IL
e
Max
b
20
m
A
I
OS
Short Circuit
Output Current
V
CC
e
Max
(Note 2)
DM54
b
20
b
20
b
100
b
100
mA
DM74
I
CCH
Supply Current with
Outputs High
V
CC
e
Max (Note 3)
5.9
10
mA
I
CCL
Supply Current with
Outputs Low
V
CC
e
Max (Note 3)
9.2
16
mA
I
CCZ
Supply Current with
Outputs Disabled
V
CC
e
Max (Note 3)
12
19
mA
Note 1:
All typicals are at V
CC
e
5V, T
A
e
25
§
C.
Note 2:
Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 3:
I
CC
is measured with all outputs open and all possible inputs grounded, while achieving the stated output conditions.
2
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PDF描述 |
|---|---|
| SN74LS242ND | 4-Bit Bus Transceiver |
| SN74LS243DR2 | 4-Bit Bus Transceiver |
| SN74LS243JD | 4-Bit Bus Transceiver |
| SN74LS258AD | 2-Input Digital Multiplexer |
| SN74LS258ADR2 | 2-Input Digital Multiplexer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN74LS242M | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN74LS242MEL | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN74LS242N | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN74LS243D | 功能描述:總線收發(fā)器 Quad bus transceiver RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| SN74LS243DE4 | 功能描述:總線收發(fā)器 Quad bus transceiver RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
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