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74HCT191N Arkusz danych(PDF) 3 Page - NXP Semiconductors

Numer części 74HCT191N
Szczegółowy opis  Presettable synchronous 4-bit binary up/down counter
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Producent  PHILIPS [NXP Semiconductors]
Strona internetowa  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HCT191N Arkusz danych(HTML) 3 Page - NXP Semiconductors

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December 1990
3
Philips Semiconductors
Product specification
Presettable synchronous 4-bit binary
up/down counter
74HC/HCT191
QUICK REFERENCE DATA
GND = 0 V; Tamb =25 °C; tr =tf =6ns
Notes
1. CPD is used to determine the dynamic power dissipation (PD in µW):
PD =CPD × VCC2 × fi +∑ (CL × VCC2 × fo) where:
fi = input frequency in MHz
fo = output frequency in MHz
∑ (CL × VCC2 × fo) = sum of outputs
CL = output load capacitance in pF
VCC = supply voltage in V
2. For HC the condition is VI = GND to VCC
For HCT the condition is VI = GND to VCC −1.5 V
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
HC
HCT
tPHL/ tPLH
propagation delay CP to Qn
CL = 15 pF; VCC = 5 V
22
22
ns
fmax
maximum clock frequency
36
36
MHz
CI
input capacitance
3.5
3.5
pF
CPD
power dissipation capacitance per package
notes 1 and 2
31
33
pF


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