參數(shù)資料
型號: HCF4541B
廠商: 意法半導體
英文描述: Programmable Timer(可編程定時器)
中文描述: 可編程定時器(可編程定時器)
文件頁數(shù): 2/11頁
文件大小: 247K
代理商: HCF4541B
RC Oscillator Circuit.
a logic” 1 ”, when it is a logic ” 0 ” andaftera MAS-
TER RESET is started, and Q output has been se-
lected, the outputgoes up to a high state after 2
N-1
counts. It remains in that state till another MASTER
RESETpulse is apply or the mode input is a logic ”
1 ”. Theprocess starts by setting theAUTO RESET
input (pin 5) to logic ” 0 ” andswitching power on. If
pin 5 is set to logic ” 1 ”, the AUTO RESET circuit is
not enabled and counting cannot start till a positive
MASTERRESETpulse isapplied, returning toalow
level. The AUTO RESET consumes a remarkable
amount of power and should not be used if low-
poweroperation is wanted.
The frequency of the oscillator depends on the RC
network. It canbe calculated using thefollowing for-
mula:
f
=
1
2.3 R
TC
C
TC
wheref is between 1 kHz and 100 kHz
and RS
10 k
and
2 R
TC
FUNCTIONAL DIAGRAM
HCC/HCF4541B
2/11
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