Tandy 2000 Service Manual page 639

82724
intel
PREL[NflINARV
ABSOLUTE MAXIMUM RATINGS*
Operating
Temperature
. .
0"C
to
+70"C
Storage
Temperature
-40"C to
+
125'C
All
Output
Voltages
--0.5
to
+ 7
Volts
All
Input
Voltages
.
-0.5 to
+ 7
Volts
Supply Voltage
Vcc
-
0.5
to
+ 7
Volts
PowerDissipation
..1Watt
'TA =
25
"C
NOTICE:
Stress
above
those /isted
u
nder
"Abso/ ute
Max'
imum Ratings" may cause
permanent damage to the
de-
vice. Thisis
a
stress
ra
ting
onty and
f
unctional operation of
the
device
at
these
or any
other conditions above those
indicated in the operational sections
of this
specif
ication
is
not
imptied.
Exposure
to
absolute maximum rating
conditions
for
extended
periods may affect
device
rel iabil ity
.
D.C. CHARACTERISTICS
(Ta
= 0"C
to
+ 70"C,
Vcc
=
+
5V
t
10%)
CAPACITANCE
(Tn
-
25"C,
fc
-
't
MHz,
Vgc
-
OV)
A.C. CHARACTERISTICS
CLOCK TIMING
(Tn0
"C
to
+
70
"C, Vcc
=
+
5.0V =
10%)
Symbol
Pa
ra
meter
Limits
Unit
Test
Conditions
Min.
Max.
Vt
Input Low Voltage -
0.5
0.8 V
Vrn
Input High
Voltage 2.0
Vcc +
0.5
V
Vol Output Low Voltage 0.45
V
lot
=
2.0 mA
Vox
Output High Voltage 2.4
Vcc
V
foH_
-400PA
lcc
Vcc Supply Current 120
mA
I11
Input
Load Current
(All Input
Pins)
10
-
10
pA
sA
Vrru
= Vcc
Vtru =
0V
lloH
High Level Output
Leakage
Cu
rrent
10
pA
VOur:
VCC
lo
rl
Output Float
Leakage Current
r
10
pA
0.45V
=..
VOUT
=..
VCC
Symbol
Parameter
Limits
Unit
Test
Conditions
Min.
Max.
C
rru(o)
Clock
I
nput Capacitance
2A
pF
All
Pins Except
Pin
Under
Test
Tied to
AC
G
rou
nd
Ctr.t
Input Capacitance
10
pF
Cuo
I
nput/Output CaPacitance
20
pF
Symbol
Parameter
Min,
Max. Unit
Notes
tCY
Clock
Period
120 500
NS
Note
5
tcx
Clock High
Period
40
NS
Note 4,
5
tRST
Reset Width 14
tCY
READ CYCLE
tAR
Select Setup to
RDt
0 NS
IRA
Select
Hold
f
rom
RDt 0
NS
IRR
nD
Putse Width
250
NS
TRD
Data Delay
f
rom RD{
200
NS
tDF
Output Float
Delay
20
100
NS
6-236 AFN.O1259C