S83C196KB Ver la hoja de datos (PDF) - Intel
Número de pieza
componentes Descripción
Fabricante
S83C196KB Datasheet PDF : 22 Pages
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EXTERNAL CLOCK DRIVE
Symbol
Parameter
1 TXLXL
1 TXLXL
TXLXL
TXLXL
TXHXX
TXLXX
TXLXH
TXHXL
Oscillator Frequency 12 MHz
Oscillator Frequency 16 MHz
Oscillator Period 12 MHz
Oscillator Period 16 MHz
High Time
Low Time
Rise Time
Fall Time
EXTERNAL CLOCK DRIVE WAVEFORMS
8XC196KB 8XC196KB16
Min
35
35
83 3
62 5
21 25
21 25
Max
12 0
16
286
286
10
10
Units
MHz
MHz
ns
ns
ns
ns
ns
ns
270909 – 10
An external oscillator may encounter as much as a 100 pF load at XTAL1 when it starts-up This is due to
interaction between the amplifier and its feedback capacitance Once the external signal meets the VIL and
VIH specifications the capacitance will not exceed 20 pF
EXTERNAL CRYSTAL CONNECTIONS
EXTERNAL CLOCK CONNECTIONS
270909 – 11
NOTE
Keep oscillator components close to chip and use
short direct traces to XTAL1 XTAL2 and VSS When
using crystals C1 e 20 pF C2 e 20 pF When using
ceramic resonators consult manufacturer for recom-
mended circuitry
AC TESTING INPUT OUTPUT WAVEFORMS
Required if open-collector TTL driver used
Not needed if CMOS driver is used
270909 – 12
FLOAT 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’’
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
when a 200 mV change from the Loaded VOH VOL Level occurs
IOL IOH e g15 mA
15
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