HD74HCT374 PDF даташит
Спецификация HD74HCT374 изготовлена «Hitachi Semiconductor» и имеет функцию, называемую «Octal D-type Flip-Flops(with inverted 3-state outputs)». |
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Детали детали
Номер произв | HD74HCT374 |
Описание | Octal D-type Flip-Flops(with inverted 3-state outputs) |
Производители | Hitachi Semiconductor |
логотип |
10 Pages
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HD74HCT374/HD74HCT534
Octal D-type Flip-Flops (with 3-state outputs)/
Octal D-type Flip-Flops (with inverted 3-state outputs)
Description
These device are positive edge triggered flip-flops. The difference between HD74HCT374 and
HD74HCT534 is only that the former is a true outputs and the latter is a false outputs. Data at the D inputs,
meeting the setup and hold time requirements, are transferred to the Q outputs on positive going transitions
of the clock (CK) input. When a high logic level is applied to the output control (OC) input, all outputs go
to a high impedance state, regardless of what signals are present at the other inputs and the state of the
storage elements.
Features
• LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility
• High Speed Operation: tpd (Clock to Q) = 15 ns typ (CL = 50 pF)
• High Output Current: Fanout of 15 LSTTL Loads
• Wide Operating Voltage: VCC = 4.5 to 5.5 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Function Table
Output Control Clock
D
LH
LL
LL
X
HX
X
X : Irrelevant
Z : Off (high-impedance) state of a 3-state output.
HD74HCT374
Q
H
L
No change
Z
HD74HCT534
Q
L
H
No change
Z
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HD74HCT374/HD74HCT534
Pin Arrangement
HD74HCT374
HD74HCT534
Output
Control
1
1Q 2
1D 3
2D 4
2Q 5
3Q 6
3D 7
4D 8
4Q 9
GND 10
(Top view)
20 VCC
19 8Q
18 8D
17 7D
16 7Q
15 6Q
14 6D
13 5D
12 5Q
11 Clock
Output
Control
1
1Q 2
1D 3
2D 4
2Q 5
3Q 6
3D 7
4D 8
4Q 9
GND 10
(Top view)
20 VCC
19 8Q
18 8D
17 7D
16 7Q
15 6Q
14 6D
13 5D
12 5Q
11 Clock
2
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Block Diagram
HD74HCT374
HD74HCT374/HD74HCT534
Clock
1D 2D 3D 4D 5D 6D 7D 8D
DQ
CQ
DQ
CQ
DQ
CQ
DQ
CQ
DQ
CQ
DQ
CQ
DQ
CQ
DQ
CQ
Output
Control
HD74HCT534
1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q
Clock
1D 2D 3D 4D 5D 6D 7D 8D
DQ
CQ
DQ
CQ
DQ
CQ
DQ
CQ
DQ
CQ
DQ
CQ
DQ
CQ
DQ
CQ
Output
Control
1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q
3
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