80C52 Datasheet, PDF (18/23 Pages) Intel Corporation – CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

8XC52 54 58
EXTERNAL CLOCK DRIVE
Symbol
Parameter
1 TCLCL
Oscillator Frequency
8XC5X
8XC5X-1
8XC5X-2
8XC5X-24
8XC5X-33
TCHCX
High Time
8XC5X-24 33
TCLCX
Low Time
8XC5X-24 33
TCLCH
Rise Time
8XC5X-24
8XC5X-33
TCHCL
Fall Time
8XC5X-24
8XC5X-33
Min
35
35
05
35
35
20
0 35 T_OSC
20
0 35 T_OSC
EXTERNAL CLOCK DRIVE WAVEFORM
Max
12
16
12
24
33
0 65 T_OSC
0 65 T_OSC
20
10
5
20
10
5
Units
MHz
MHz
MHz
MHz
MHz
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
AC TESTING INPUT OUTPUT WAVEFORMS
FLOAT WAVEFORMS
272336 – 16
272336 – 19
AC Inputs during testing are driven at V_CCb0 5V for a Logic ‘‘1’’
and 0 45V for a Logic ‘‘0’’ Timing measurements are made at V_IH
min for a Logic ‘‘1’’ and V_IL max for a Logic ‘‘0’’
272336 – 20
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 V_OH V_OL level occurs
I_OL I_OH e g20 mA
18