DC ELECTRICAL CHARACTERISTICS
TA = 0oC - 70oC, VCC = 5.0V +/- 10%, unless otherwise specified.
SYMBOL
PARAMETER
LIMITS
MIN
TYP
MAX
UNIT
S
CONDITIONS
VILCK Clock Input Low level
-0.5
0.6
V
VIHCK Clock Input High level
3.0
VCC
V
VIL
Input Low level
-0.5
0.8
V
VIH
Input High level
2.0
VCC
V
VOL
Output Low level
0.4
V
DRQ1-3, IOCHRDY: IOL = 14 mA
D0-D7: IOL = 12 mA
PDIR: IOL = 4 mA
All other outputs: IOL = 20mA
VOH
Output High level
2.4
V
D0-D7: IOH = -12mA
PDIR: IOH = -1mA
All other outputs: IOH = -20mA
ICC
Avg. power supply current
7
9
mA
IIL
Input leakage
10
A
ICL
Clock leakage
10
A
IR
Internal pull up resistor current
-85
-30
A For inputs -DACK1-3, -ERROR,
SLCT, BUSY, -ACK and PE
ST78C36/36A
20
ECP/EPP PARALLEL PRINTER PORT WITH 16-BYTE FIFO
REV. 5.1.0
NOTE: Hewlett Packard / Microsoft compliance testing requires all ECP mode drivers to be push-pull and that they have an
impedance controlled series resistor of at least 20 Ohms and that the typical on resistance of the combination of
the driver-resistor pair is in the 45-65 Ohm range.