參數(shù)資料
型號(hào): 935262466112
廠商: NXP SEMICONDUCTORS
元件分類: 計(jì)數(shù)器
英文描述: HCT SERIES, ASYN NEGATIVE EDGE TRIGGERED 7-BIT UP BINARY COUNTER, PDSO14
封裝: PLASTIC, SOT-402, 14 PIN
文件頁數(shù): 2/7頁
文件大小: 41K
代理商: 935262466112
December 1990
2
Philips Semiconductors
Product specication
7-stage binary ripple counter
74HC/HCT4024
FEATURES
Output capability: standard
ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT4024 are high-speed Si-gate CMOS
devices and are pin compatible with the “4024” of the
“4000B” series. They are specified in compliance with
JEDEC standard no. 7A.
The 74HC/HCT4024 are 7-stage binary ripple counters
with a clock input (CP), an overriding asynchronous
master reset input (MR) and seven fully buffered parallel
outputs (Q0 to Q6).
The counter advances 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.
Schmitt-trigger action in the clock input makes the circuit
highly tolerant to slower clock rise and fall times.
APPLICATIONS
Frequency dividing circuits
Time delay circuits
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 W):
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 Q0
CL = 15 pF; VCC = 5 V
14
ns
fmax
maximum clock frequency
90
70
MHz
CI
input capacitance
3.5
pF
CPD
power dissipation capacitance per package
notes 1 and 2
25
27
pF
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