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MM74HCT74 采用先进的硅门极 CMOS 工艺,运行速度与 LS-TTL 零部件相似。它具有标准 CMOS 集成电路的高抗扰度和低功耗,并能驱动 10 个 LS-TTL 负载。此触发器拥有独立的数据、预设、清除和时钟输入,以及 Q 和 Q# 输出。时钟脉冲正向转换期间,数据输入端的逻辑电平被传送至输出。预设和清除输入与时钟无关,通过适当输入端的低电平来完成。74HCT 逻辑系列可与标准 74LS 逻辑系列实现功能和引脚输出兼容。通过将内部二极管箝位到 VCC 和接地,防止所有输入因静电放电受损。MM74HCT 器件适合用作 TTL 和 NMOS 组件与标准 CMOS 器件之间的接口。此类零部件也是 LS-TTL 器件的插件替代品,可用于降低现有设计的功耗。
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CAD Models
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Package Type
Case Outline
MSL Type
MSL Temp (°C)
Container Type
Container Qty.
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Type
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VCC Min (V)
VCC Max (V)
tpd Max (ns)
IO Max (mA)
Reference Price
MM74HCT74M
Active
Pb
A
H
P
SOIC-14
1
260
TUBE
55
N
Dual D-type w/preset and clear
2
4.5
5.5
30
4.8
$0.2073
More Details
MM74HCT74MTC
Obsolete
Pb
A
H
P
TSSOP-14 WB
1
260
TUBE
96
N
Dual D-type w/preset and clear
2
4.5
5.5
30
4.8
Price N/A
More Details
MM74HCT74MTCX
Active
Pb
A
H
P
TSSOP-14 WB
1
260
REEL
2500
N
Dual D-type w/preset and clear
2
4.5
5.5
30
4.8
$0.1785
More Details
MM74HCT74MX
Active
Pb
A
H
P
SOIC-14
1
260
REEL
2500
N
Dual D-type w/preset and clear
2
4.5
5.5
30
4.8
$0.1596
More Details
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