Philips pm2521 - Page 131

139
8.6. LOW
POWER SCHOTTKY
CIRCUITS
(LS)
LOW
POWER
SCHOTTKY
54LS/74LS
FAMILY
CHARACTERISTICS
DC
CHARACTERISTICS
OVER
OPERATING
TEMPERATURES
Parameter
Test
conditions
Limits
Unit
Min
1
Typ*
Max
V,i_i
Input
HIGH voltage
1
H
Guaranteed
input
HIGH
voltage for all
inputs
2.0
V
V||^
Input
LOW voltage
Guaranteed
input
LOW
voltage
for inputs
Mil
0.7
V
Com
0.8
V
VcD
Input clamp diode
voltage
=
Min.
I||^
=-18mA
-0.65 -1.5 V
V-,
Output LOW
voltage
UL
'^CC
'oL
~
0.25
0.4 V
=
Min. Iq^
=
8.0mA (Com.
only)
0.35
0.5
V
V_u
Output
HIGH
voltage
Un
Vcc
=
Min.
loH
=
-400/iA
Mil
2.5
3.4
V
Com
2.7
3.4
V
l-^j
Output
HIGH current (open
collector)
Un
Vcc
=
Min.
Vqct
100
PA
I/-X-
71
J
Output "off"
current
HIGH (3-state)
OZH
Vcc
=
Max.
Vqct
=
2.4V
V^
=2.0V
20
PA
Iq
2 l
Output
"off"
current LOW (3-state)
VqY
=
2.0V
-20
PA
2
l|^
Input HIGH current
Vcc
=
Max.
V|^
=
2.7V
20
PA
1
^
Input
HIGH current at Max
input
voltage
Vcc=Max.V|^
=
10v3
0.1
mA
2
Input
LOW
current
Vcc
=
Max. V|^
=
0.4V
-0.4 mA
1
Qg
Output short
circuit current
Vcc
=
Max.
VccT
=
0V
-15
-100
mA
NOTES:
1. Typical
limits are at 2^C
and v
qq=5.
0 V
2. The
specified limits
reflect one unit
load
for the family.
When more than
one load is
connected internally,
the limits must
be
multiplied by
the number of
connected loads.
See the INPUT
AND OUTPUT
LOADING
AND FAN-OUT
TABLE
on the data
sheets
for the
guaranteed limit for
each input.
3.
The following
LS devices are
limited to a
5.5V input
breakdown voltage. AH
inputs
of
the LS181
;
dock
inputs of LS90,
LS92, LS93,
LS196,
LSI
97,
LS290,
LS293,
LS390,
LS393
and LS490.