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M54HC161 Fiches technique(PDF) 11 Page - STMicroelectronics

No de pièce M54HC161
Description  SYNCHRONOUS PRESETTABLE 4-BIT COUNTER
PDF  16 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M54HC161 Fiches technique(HTML) 11 Page - STMicroelectronics

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TEST CIRCUIT ICC (Opr.)
SWITCHING CHARACTERISTICS TEST WAVEFORM (continued)
TOTAL OPERATING CURRENT WHEN
USING A CAPACITIVE LOAD
TYPICAL APPLICATION
COUNTENABLE MODE
CASCADE MODE
(fix maximum count)
When the outputs drive a capacitive load, the
total current can be calculated as follows :
For M74HC160/162 :
∆ lCC =fCK ⋅ VCC⋅ 
Ca
2
+
Cb
5
+
Cc
10
+
Cd
10
+
Cca
10
For M74HC161/163 :
∆ lCC =fCK ⋅ VCC⋅
Ca
2
+
Cb
4
+
Cc
8
+
Cd
16
+
Cca
16
Ca to Cca are the capacitors loading the out-
puts.
M54/M74HC160/161/162/163
11/16



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