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AT89C51ED2-RDTIM Datasheet(PDF) 125 Page - ATMEL Corporation

No. de pieza AT89C51ED2-RDTIM
Descripción Electrónicos  8-bit Flash Microcontroller
PDF  137 Pages
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Fabricante Electrónico  ATMEL [ATMEL Corporation]
Página de inicio  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C51ED2-RDTIM Datasheet(HTML) 125 Page - ATMEL Corporation

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AT89C51RD2/ED2
4235E–8051–04/04
AC Testing Input/Output
Waveforms
AC inputs during testing are driven at VCC - 0.5 for a logic “1” and 0.45V for a logic “0”.
Timing measurement are made at VIH min for a logic “1” and VIL max for a logic “0”.
Float Waveforms
For timing purposes as 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 ≥ ± 20 mA.
Clock Waveforms
Valid in normal clock mode. In X2 mode XTAL2 must be changed to XTAL2/2.
INPUT/OUTPUT
0.2 VCC + 0.9
0.2 VCC - 0.1
VCC -0.5V
0.45V
FLOAT
VOH - 0.1V
V
OL + 0.1V
V
LOAD
V
LOAD + 0.1V
V
LOAD - 0.1V



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