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Chapter 9: Specifications and Characteristics
HP 64780A Electrical Specifications
HP 64780A Electrical Specifications
Characteristic
Input High Voltage (except EXTAL)
Input Low Voltage
EXTAL Input High Voltage
Undershoot
Hi-Z (Off-State) Leakage Current (all noncrystal outputs
and I/O pins) @ V
= 0.5/2.4 V
in
Signal Low Input
Current (V
= 0.8 V)
IL
Signal High Input
Current (V
= 2.0 V)
IH
Output High Voltage
I
= –-0.8 mA, V
= 4.75 V
OH
CC
All noncrystal outputs except open drain pins
144
HP 64780A — DC ELECTRICAL SPECIFICATIONS
=5.0 Vdc ±5%)
(
V CC
DSACK0-1, BERR, HALT, BR
DSACK0-1, BERR, HALT, BR
Symbol
Min
V
2.0
IH
V
GND
IL
V
0.7*V
IHC
CC
—
I
-20
OZ
BGACK,
I
IL
A31-0,
SIZ1-0,
FC3-0
AS, DS,
R/W
All
other
inputs
BGACK,
I
IH
A31-0,
SIZ1-0,
FC3-0
AS, DS,
R/W
All
other
inputs
V
2.4
OH
Max
Unit
V
V
CC
0.8
V
VCC+0.3
V
-0.8
V
µA
20
—
-0.8
-1.6
-0.2
—
50
100
20
—
V
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