Tandy 1000
TYPE
SN76494.
SN76496
PROGRAMMABLE
TONE/NOISE
GENERATOR
IChematics
of
inputs
and
outputs
Technical Reference Manual
EQUIVALENT
OF
INPUTS
OF
'494,
'496
EQUIVALENT
OF
INPUTS
OF
'494,
'496
VCC~----
20kO
INPUT
-=
20
kO
TYPICAL
OF OUTPUTS
OF
'494,
'496
absolute
maximum
ratings
over
operating
free-air
temperature
range
(unless
otherwise
noted)
Supply
voltage, VCC (see Note
1)
, , , , , ,
..
, . ,
..
, , , , ,
15V
Input
voltage. Vj:
Audio
input
,
..
,."
,
..
"."
. ,
0.9V
All
other
inputs
, , , , . , , . , ,
7V
Output
current
at
pin
7 , , , , ,
..
,
..
, ,
10
mA
Continuous
total
power
dissipation
at
(or
below)
25°C
free·air
temperature
(see
Note
2)
..
,
1150
mW
Operating
free·air
temperature
range , , , , , , , , ,
..
, , , , . , . , , O°C
to
70°C
Storage
temperature
range
,."
, ,
..
, , , , , , , , , . , . , .
-~5°C
to
150°C
Lead
temperature
1,6
mm
(1/16
inch)
from
case
for
10
seconds
"."
260°C
recommended
operating
conditions
SN76494 SN76496
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
Vee
Supply voltage
4.5
5
5.5
4.5
5
5.5
V
VIH
High·level input voltage
2
2 V
VIL
Low·level
input
yoltage
0.8
0.8
V
AudiO
input
current
0 1.8 1.8
mA
VOH
Hlgh.level output voltage (pin 4)
5.5 5.5
V
IoL
Low-level
output
current
(pin
4)
2 2
mA
'clock
Input
clock
freQuency
0.5
4
MHz
lcllWEI
Delay time, eE
low
to
WE
low
0
0
t
su
Setup time. data before WEI
0
0
th
Holdtime. data
alter
READY 4
0
0
TA
Operating
free-air
temperature
0
70
0
70
°e
NOTES
1
All
voltage
velues
.re
WIth respect
to
network
groLJnd
fermlnal
2 For
operation
.bove
25°C
free-air
temperature
linearly
lit
the
rate
of
9.2
nW/oC
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