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HD74HC4520 PDF даташит

Спецификация HD74HC4520 изготовлена ​​​​«Hitachi Semiconductor» и имеет функцию, называемую «Dual BCD Use Converters/Dual Binary Up Converters».

Детали детали

Номер произв HD74HC4520
Описание Dual BCD Use Converters/Dual Binary Up Converters
Производители Hitachi Semiconductor
логотип Hitachi Semiconductor логотип 

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HD74HC4520 Даташит, Описание, Даташиты
HD74HC4518/HD74HC4520
Dual BCD Use Converters/Dual Binary Up Converters
Description
The HD74HC4518 dual BCD counter and the HD74HC4520 dual binary counter consist of two identical,
independent, internally synchronous 4-stage counters. The counter stages are type D flip-flops, with
interchangeable Clock and Enable lines for incrementing on either the positive-going or negative-going
transition as required when cascading multiple stages. Each counter can be cleared by applying a high
level on the Reset line. In addition, the HD74HC4518 will count out of all undefined states within two
clock periods. These complementary MOS up counters find primary use in multi-stage synchronous or
ripple counting applications requiring low power dissipation and/or high noise immunity.
Features
High Speed Operation
High Output Current: Fanout of 10 LSTTL Loads
Wide Operating Voltage: VCC = 2 to 6 V
Low Input Current: 1 µA max
Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Function Table
Clock
L
X
H
X
Enable
H
X
L
X
Reset
L
L
L
L
L
L
H
Operation
Increment counter
Increment counter
No change
No change
No change
No change
Q0 to Q3 = L









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HD74HC4520 Даташит, Описание, Даташиты
HD74HC4518/HD74HC4520
Pin Arrangement
Clock A 1
Enable A 2
Q0 A 3
Q1 A 4
Q2 A 5
Q3 A 6
Reset A 7
GND 8
16 VCC
15 Reset B
CR
Q0 Q3 14 Q3 B
Q1 Q2 13 Q2 B
Q2 Q1 12 Q1 B
Q3 Q0 11 Q0 B
RC
10 Enable B
9 Clock B
(Top view)
2









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HD74HC4520 Даташит, Описание, Даташиты
Timing Diagram
Clock
Enable
Reset
Q0
HD74HC4518
Q1
Q2
Q3
Q0
HD74HC4520
Q1
Q2
Q3
HD74HC4518/HD74HC4520
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
12345678901234567890
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4
3










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Номер в каталогеОписаниеПроизводители
HD74HC4520Dual BCD Use Converters/Dual Binary Up ConvertersHitachi Semiconductor
Hitachi Semiconductor

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