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74LS74 PDF预览

74LS74

更新时间: 2024-01-11 04:49:19
品牌 Logo 应用领域
美国国家半导体 - NSC 触发器
页数 文件大小 规格书
6页 139K
描述
Dual Positive-Edge-Triggered D Flip-Flops with Preset, Clear and Complementary Outputs

74LS74 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
包装说明:DIP, DIP14,.3Reach Compliance Code:compliant
风险等级:5.92JESD-30 代码:R-PDIP-T14
JESD-609代码:e0逻辑集成电路类型:D FLIP-FLOP
功能数量:2端子数量:14
最高工作温度:70 °C最低工作温度:
封装主体材料:PLASTIC/EPOXY封装代码:DIP
封装等效代码:DIP14,.3封装形状:RECTANGULAR
封装形式:IN-LINE电源:5 V
子类别:FF/Latches标称供电电压 (Vsup):5 V
表面贴装:NO技术:TTL
温度等级:COMMERCIAL端子面层:Tin/Lead (Sn/Pb)
端子形式:THROUGH-HOLE端子节距:2.54 mm
端子位置:DUAL触发器类型:POSITIVE EDGE
Base Number Matches:1

74LS74 数据手册

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Absolute Maximum Ratings (Note)  
If Military/Aerospace specified devices are required,  
please contact the National Semiconductor Sales  
Office/Distributors for availability and specifications.  
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.  
Supply Voltage  
Input Voltage  
7V  
7V  
Operating Free Air Temperature Range  
DM54LS and 54LS  
DM74LS  
b
b
a
a
55 C to 125 C  
§
§
0 C to 70 C  
§
§
a
65 C to 150 C  
Storage Temperature Range  
§
§
Recommended Operating Conditions  
DM54LS74A  
DM74LS74A  
Symbol  
Parameter  
Units  
Min  
4.5  
2
Nom  
Max  
Min  
4.75  
2
Nom  
Max  
V
V
V
Supply Voltage  
5
5.5  
5
5.25  
V
V
CC  
High Level Input Voltage  
Low Level Input Voltage  
High Level Output Current  
Low Level Output Current  
Clock Frequency (Note 2)  
Clock Frequency (Note 3)  
IH  
0.7  
0.8  
V
IL  
b
b
0.4  
I
I
0.4  
mA  
mA  
MHz  
MHz  
OH  
OL  
4
8
f
f
t
0
25  
20  
0
25  
20  
CLK  
CLK  
W
0
0
Pulse Width  
(Note 2)  
Clock High  
18  
15  
15  
25  
20  
20  
18  
15  
15  
25  
20  
20  
Preset Low  
Clear Low  
Clock High  
Preset Low  
Clear Low  
ns  
ns  
t
W
Pulse Width  
(Note 3)  
t
t
t
Setup Time (Notes 1 and 2)  
Setup Time (Notes 1 and 3)  
Hold Time (Note 1 and 4)  
20  
20  
ns  
ns  
ns  
u
u
u
u
SU  
SU  
H
25  
0
25  
0
u
u
b
T
Free Air Operating Temperature  
55  
125  
0
70  
C
§
A
Note 1: The symbol ( ) indicates the rising edge of the clock pulse is used for reference.  
u
L
e
e
e
e
e
e
e
e
e
Note 2: C  
Note 3: C  
Note 4: T  
15 pF, R  
2 kX, T  
2 kX, T  
25 C, and V  
§
25 C, and V  
§
5V.  
5V.  
L
A
A
CC  
CC  
50 pF, R  
L
L
e
CC  
25 C and V  
§
5V.  
A
2

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