80C154/83C154
External Clock Drive Characteristics (XTAL1)
SYMBOL
FCLCL
PARAMETER
Oscillator Frequency
Oscillator period
High Time
MIN
MAX
UNIT
MHz
ns
36
TCLCL
TCHCX
TCLCX
TCLCH
TCHCL
27.8
5
ns
Low Time
5
ns
Rise Time
5
5
ns
Fall Time
ns
External Clock Drive Waveforms
AC Testing Input/Output Waveforms
AC inputs during testing are driven at Vcc – 0.5 for a logic “1” and 0.45 V for a logic “0”. Timing measurements are
made at VIH min for a logic “1” and VIL max for a logic “0”.
Float Waveforms
For timing purposes as port pin is no longer floating when a 100 mV change from load voltage occurs and begins to
float when a 100 mV change from the loaded VOH/VOL level occurs. Iol/IoH ≥ ± 20 mA.
22
MATRA MHS
Rev.F (14 Jan. 97)
TEMIC [ TEMIC SEMICONDUCTORS ]
