MT80C51FB 데이터 시트보기 (PDF) - Intel
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MT80C51FB Datasheet PDF : 12 Pages
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M80C51FB
EXTERNAL CLOCK DRIVE
Symbol
Parameter
Min
Max
Units
1 TCLCL
Oscillator Frequency
M80C51FB
35
12
MHz
M80C51FB-16
35
16
TCHCX
High Time
20
ns
TCLCX
Low Time
20
ns
TCLCH
Rise Time
20
ns
TCHCL
Fall Time
20
ns
EXTERNAL CLOCK DRIVE WAVEFORM
A C TESTING INPUT
Input Output Waveforms
271172 – 14
Float Waveforms
271172 – 15
AC Inputs during testing are driven at VCCb0 5V for a Logic ‘‘1’’
and 0 45V for a Logic ‘‘0’’ Timing measurements are made at VIH
min for a Logic ‘‘1’’ and VIL max for a Logic ‘‘0’’
271172 – 16
For timing purposes a port pin is no longer floating when a
100 mV change from load voltage occurs and begins to float
when a 100 mV change from the loaded VOH VOL level occurs
IOL IOH t g20 mA
12
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