參數(shù)資料
型號(hào): 933637620112
廠商: NXP SEMICONDUCTORS
元件分類: 諧振器
英文描述: 4000/14000/40000 SERIES, PRESCALER, PDIP18
封裝: PLASTIC, SOT-102-3, DIP-18
文件頁(yè)數(shù): 9/11頁(yè)
文件大?。?/td> 115K
代理商: 933637620112
January 1995
7
Philips Semiconductors
Product specication
Universal timer module
HEF4753B
LSI
6. Frequency recognition mode (LFC = LOW; Y = HIGH; Z = HIGH)
The incoming signal must be symmetrical within the limits as given by the specified delay time in note 2., to achieve lower
or higher frequency detection (see Fig.8).
Fig.8
Timing diagram for frequency recognition mode; tx = time shorter than t3 (OUT = H); ty = time greater than
t3 (OUT = L); for t1, t2 and t3 see Fig.5.
Minimum dividing number is 3.
A
B
C
D
E
F
G
H
W
X
LFC
Y
Z
L
H
L
H
HHH
H
L
H
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