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參數(shù)資料
| 型號： | 933824690005 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 計數(shù)器 |
| 英文描述： | HCT SERIES, ASYN NEGATIVE EDGE TRIGGERED 12-BIT UP BINARY COUNTER, UUC |
| 封裝： | CHIP ON WAFER |
| 文件頁數(shù)： | 2/7頁 |
| 文件大?。?/td> | 46K |
| 代理商： | 933824690005 |
December 1990
2
Philips Semiconductors
Product specication
12-stage binary ripple counter
74HC/HCT4040
FEATURES
Output capability: standard
ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT4040 are high-speed Si-gate CMOS
devices and are pin compatible with “4040” of the “4000B”
series. They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT4040 are 12-stage binary ripple counters
with a clock input (CP), an overriding asynchronous
master reset input (MR) and twelve parallel outputs
(Q0 to Q11). 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.
APPLICATIONS
Frequency dividing circuits
Time delay circuits
Control counters
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
CL = 15 pF; VCC =5 V
CP to Q0
14
16
ns
Qn to Qn+1
88ns
fmax
maximum clock frequency
90
79
MHz
CI
input capacitance
3.5
pF
CPD
power dissipation capacitance per package
notes 1 and 2
20
pF
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