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M74HC390 Datasheet(PDF) 3 Page - STMicroelectronics

Part # M74HC390
Description  Dual decade counter
PDF  17 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M74HC390 Datasheet(HTML) 3 Page - STMicroelectronics

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M74HC390
Pin settings
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1
Pin settings
1.1
Pin connection
Figure 1.
Pin connection (top through view)
1.2
Pin description
Table 1. Pin description
Pin N°
Symbol
Name and function
1, 15
1 CLOCK A
2 CLOCK B
Clock input divide by 2 section (HIGH to LOW Edge-Triggered)
2, 14
1 CLEAR
2 CLEAR
Asynchronous master reset inputs
3, 5, 6, 7
1QA to 1QD Flip flop outputs
4, 12
1 CLOCK A
2 CLOCK B
Clock input divide by 5 section (HIGH to LOW Edge-Triggered)
13, 11, 10, 9 2QA to 2QD Flip flop outputs
8
GND
Ground (0V)
16
Vcc
Positive supply voltage



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