8XC151SASB HIGH-PERFORMANCE CHMOS MICROCONTROLLER

DC CHARACTERISTICS

Parameter values apply to all devices unless otherwise indicated

Symbol

Parameter

Min

Typical

Max

Units

Test Conditions

Input Low Voltage

b

05

V

(except EA )

Input Low Voltage

0

V

(EA )

Input High Voltage

V

(except XTAL1 RST)

Input High Voltage

V

(XTAL1 RST)

Output Low Voltage

03

V

(Port 1 2 3)

045

10

(Note 1 Note 2)

Output Low Voltage

03

V

(Port 0 ALE PSEN )

045

10

(Note 1 Note 2)

Output High Voltage

V

(Port 1 2 3 ALE

(Note 3)

NOTES

10 mA

port 0

26 mA

ports 1 – 3

15 mA

all output pins

71 mA

greater than the listed test conditions

2 Capacitive loading on ports 0 and 2 may cause spurious noise pulses above 04V on the low-level outputs of ALE and

ports 1 2 and 3 The noise is due to external bus capacitance discharging into the port 0 and port 2 pins when these

pins change from high to low In applications where capacitive loading exceeds 100 pF the noise pulses on these

signals may exceed 08V It may be desirable to qualify ALE or other signals with a Schmitt trigger or CMOS-level input

logic

to drop below the specification when the

address lines are stabilizing

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