80C550 Datasheet, PDF (20/28 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless, 8 channel 8 bit A/D, watchdog timer

Philips Semiconductors
80C51 8-bit microcontroller family
4K/128 OTP/ROM/ROMless, 8 channel 8 bit A/D, watchdog timer
Product specification
80C550/83C550/87C550
V_CC–0.5
0.45V
0.2V_CC+0.9
0.2V_CC–0.1
NOTE:
AC inputs during testing are driven at V_CC –0.5 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’.
Figure 10. AC Testing Input/Output
SU00717
V_LOAD
V_LOAD+0.1V
V_LOAD–0.1V
TIMING
REFERENCE
POINTS
V_OH–0.1V
V_OL+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 V_OH/V_OL
level occurs. I_OH/I_OL ≥ ±20mA.
SU00011
Figure 11. Float Waveform
30
25
I_CC mA ₂₀
MAX ACTIVE MODE
15
TYP ACTIVE MODE
10
5
MAX IDLE MODE
TYP IDLE MODE
4MHz 8MHz 12MHz 16MHz
FREQ at XTAL1
SU00201
Figure 12. I_CC vs. FREQ (Commercial Temp. Range)
Valid only within frequency specifications of the device under test
1998 May 01
20