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74HCT4020N датащи(PDF) 2 Page - NXP Semiconductors

номер детали 74HCT4020N
подробное описание детали  14-stage binary ripple counter
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производитель  PHILIPS [NXP Semiconductors]
домашняя страница  http://www.nxp.com
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74HCT4020N датащи(HTML) 2 Page - NXP Semiconductors

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September 1993
2
Philips Semiconductors
Product specification
14-stage binary ripple counter
74HC/HCT4020
FEATURES
• Output capability: standard
• ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT4020 are high-speed Si-gate CMOS
devices and are pin compatible with the “4020” of the
“4000B” series. They are specified in compliance with
JEDEC standard no. 7A.
The 74HC/HCT4020 are 14-stage binary ripple counters
with a clock input (CP), an overriding asynchronous
master reset input (MR) and twelve fully buffered parallel
outputs (Q0, Q3 to Q13).
The counter is advanced on the HIGH-to-LOW transition of
CP.
A HIGH on MR clears all counter stages and forces all
outputs LOW, independent of the state of CP.
Each counter stage is a static toggle flip-flop.
QUICK REFERENCE DATA
GND = 0 V; Tamb =25 °C; tr =tf = 6 ns
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
CL = 15 pF; VCC =5 V
CP to Q0
11
15
ns
Qn to Qn+1
66ns
MR to Qn
17
19
ns
fmax
maximum clock frequency
101
52
MHz
CI
input capacitance
3.5
3.5
pF
CPD
power dissipation capacitance per package
notes 1 and 2
19
20
pF


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