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UPD754144GS bảng dữ liệu(PDF) 49 Page - NEC

tên linh kiện UPD754144GS
Giải thích chi tiết về linh kiện  4-BIT SINGLE-CHIP MICROCONTROLLERS
PDF  88 Pages
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nhà sản xuất  NEC [NEC]
Trang chủ  http://www.nec.com/
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UPD754144GS bảng dữ liệu(HTML) 49 Page - NEC

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49
µPD754144, 754244
•
µPD754144
System Clock Oscillator Characteristics (TA = –40 to +85
°C, VDD = 1.8 to 6.0 V)
Resonator
Recommended Constant
Parameter
Testing Conditions
MIN.
TYP.
MAX.
Unit
RC
Oscillation
0.4
2.0
MHz
oscillator
frequency (fcc) Note
Note Only the oscillator characteristics are shown. For the instruction execution time and oscillation frequency
characteristics, refer to AC Characteristics.
Caution When using the oscillation circuit of the system clock, wire the portion enclosed in dotted lines
in the figures as follows to avoid adverse influences on the wiring capacitance:
• Keep the wire length as short as possible.
• Do not cross other signal lines.
• Do not route the wiring in the vicinity of lines though which a high fluctuating current flows.
• Always keep the ground point of the capacitor of the oscillation circuit as the same potential
as VSS.
• Do not connect the power source pattern through which a high current flows.
• Do not extract signals from the oscillation circuit.
CL1
CL2
•



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