8XC196KB/8XC196KB16

EXTERNAL CLOCK DRIVE

Symbol

Parameter

Min

Max

Units

Oscillator Frequency 12 MHz

3.5

12.0

MHz

Oscillator Frequency 16 MHz

3.5

16

MHz

Oscillator Period 12 MHz

83.3

286

ns

Oscillator Period 16 MHz

62.5

286

ns

High Time

21.25

ns

Low Time

21.25

ns

Rise Time

10

ns

Fall Time

10

ns

EXTERNAL CLOCK DRIVE WAVEFORMS

270909±10

An external oscillator may encounter as much as a 100 pF load at XTAL1 when it starts-up. This is due to

EXTERNAL CRYSTAL CONNECTIONS

270909±11

NOTE:

Keep oscillator components close to chip and use

ceramic resonators, consult manufacturer for recom-

mended circuitry.

EXTERNAL CLOCK CONNECTIONS

270909±12

Required if open-collector TTL driver used

Not needed if CMOS driver is used.

AC TESTING INPUT, OUTPUT WAVEFORMS

270909±13

AC Testing inputs are driven at 2.4V for a Logic ``1'' and 0.45V for

a Logic ``0'' Timing measurements are made at 2.0V for a Logic

``1'' and 0.8V for a Logic ``0''.

FLOAT WAVEFORMS

270909±14

For Timing Purposes a Port Pin is no Longer Floating when a

200 mV change from Load Voltage Occurs and Begins to Float

15