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AT89C51AC3-RDTIM Datasheet(PDF) 131 Page - ATMEL Corporation

Part # AT89C51AC3-RDTIM
Description  Enhanced 8-bit Microcontroller with 64KB Flash Memory
PDF  143 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C51AC3-RDTIM Datasheet(HTML) 131 Page - ATMEL Corporation

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AT89C51AC3
4383B–8051–01/05
External Clock Drive
Waveforms
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.
VCC-0.5V
0.45V
0.7VCC
0.2VCC-0.1
TCHCL
TCLCX
TCLCL
TCLCH
TCHCX
INPUT/OUTPUT
0.2 VCC + 0.9
0.2 VCC - 0.1
VCC -0.5V
0.45V
FLOAT
VOH - 0.1 V
VOL + 0.1 V
VLOAD
VLOAD + 0.1 V
VLOAD - 0.1 V



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