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83C453 Datasheet, PDF (20/26 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 8K/256 OTP/ROM, expanded I/O | |||
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Philips Semiconductors
80C51 8-bit microcontroller family
8K/256 OTP/ROM, expanded I/O
Preliminary specification
83C453/87C453
VCCâ0.5
0.45V
0.7VCC
0.2VCCâ0.1
tCHCL
tCLCX
tCHCX
tCLCH
tCLCL
Figure 17. External Clock Drive
SU00009
VCCâ0.5
0.45V
0.2VCC+0.9
0.2VCCâ0.1
NOTE:
AC inputs during testing are driven at VCC â0.5 for a logic â1â and 0.45V for a logic â0â.
Timing measurements are made at VIH min for a logic â1â and VIL max for a logic â0â.
Figure 18. AC Testing Input/Output
SU00717
VLOAD
VLOAD+0.1V
VLOADâ0.1V
TIMING
REFERENCE
POINTS
VOHâ0.1V
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.
SU00718
Figure 19. Float Waveform
30
MAX ACTIVE MODE
25
20
ICC mA 15
10
TYP ACTIVE MODE
5
MAX IDLE MODE
TYP IDLE MODE
4MHz 8MHz 12MHz 16MHz
FREQ AT XTAL1
VALID ONLY WITHIN FREQUENCY SPECIFICATIONS OF THE DEVICE UNDER TEST.
SU00092
Figure 20. ICC vs. FREQ
1998 Apr 23
20
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