S80C851-4N44 View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
S80C851-4N44 Datasheet PDF : 22 Pages
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Philips Semiconductors
CMOS single-chip 8-bit microcontroller
with on-chip EEPROM
Product specification
80C851/83C851
Table 4. External Clock Drive XTAL1
SYMBOL
PARAMETER
tCLCL
Oscillator clock period
tHIGH
HIGH time
tLOW
LOW time
tr
Rise time
tf
Fall time
tCY
Cycle time1
NOTE:
1. tCY = 12 tCLCL.
VARIABLE CLOCK
f = 1.2 – 16MHz
MIN
MAX
63
833
20
tCLCL – tLOW
20
tCLCL – tHIGH
–
20
–
20
0.75
10
VARIABLE CLOCK
f = 3.5 – 24MHz
MIN
MAX
42
286
17
tCLCL – tLOW
17
tCLCL – tHIGH
–
5
–
5
0.5
3.43
UNIT
ns
ns
ns
ns
ns
ms
VDD–0.5
0.45V
0.7VDD
0.2VDD–0.1
tCHCL
tCLCX
tCHCX
tCLCH
tCLCL
Figure 8. External Clock Drive
2.4V
2.0V
0.45V
0.8V
NOTE:
AC inputs during testing are driven at 2.4V for a logic ‘1’ and 0.45V for a logic ‘0’.
Timing measurements are made at 2.0V min for a logic ‘1’ and 0.8V for a logic ‘0’.
Figure 9. AC Testing Input/Output
VLOAD+0.1V
VLOAD
VLOAD–0.1V
TIMING
REFERENCE
POINTS
VOH–0.1V
VOL+0.1V
NOTE:
For timing purposes, a port is no longer floating when a 100mV change from load voltage occurs, and begins to float when a 100mV change
≥ ± from the loaded VOH/VOL level occurs. IOH/IOL
20mA.
Figure 10. Float Waveform
1998 Jul 03
16
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