參數(shù)資料
型號: UPD720122F1-DN2
廠商: NEC Corp.
英文描述: MOS Integrated Circuit
中文描述: 馬鞍山集成電路
文件頁數(shù): 20/82頁
文件大?。?/td> 650K
代理商: UPD720122F1-DN2
Data Sheet S16685EJ2V0DS
20
μ
PD720122
2.6
AC Characteristics (T
A
= 0 to +70
°
C, V
DD
= 3.3 V
±
10%)
The AC characteristics are classified into those of the USB interface block and those of the BIU.
2.6.1
Overall AC characteristics and those of BIU
(1) Clock
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
Clock frequency
f
CLK
X
tal
-500ppm
30
+500ppm
MHz
Oscillator block
-500ppm
30
+500ppm
MHz
Clock Duty cycle
T
DUTY
40
50
60
%
Remarks 1.
Reccomended accurarcy of clock frequency is
±
100ppm.
Required accurarcy of X
tal or Oscillator block is includeing initial frequency accuracy, the spread of
X
tal capacityor loading, supply voltage, temperature, and aging etc.
2.
(2) Reset
Symbol
Specification
Min.
Typ.
Max.
Unit
TR
Reset width
2
μ
s
HW reset timing
RESETB
TR
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