Datasheet
SDAS212A − DECEMBER 1983 − REVISED DECEMBER 1994
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
recommended operating conditions
SN54AS194 SN74AS194
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
V
CC
Supply voltage 4.5 5 5.5 4.5 5 5.5 V
V
IH
High-level input voltage 2 2 V
V
IL
Low-level input voltage 0.8 0.8 V
I
OH
High-level output current −2 −2 mA
I
OL
Low-level output current 20 20 mA
f
clock
* Clock frequency 0 75 0 80 MHz
CLR 4 4.5
t
w
* Pulse duration
CLK high
4 4
ns
t
w
*
Pulse duration
CLK low 6 7
ns
Select 9 9.5
t
su
*
Setup time before CLK↑
Data
3.5 4
ns
t
su
*
Setup time before CLK↑
Clear inactive state 6 6
ns
t
h
* Hold time, data after CLK↑ 0.5 0.5 ns
T
A
Operating free-air temperature −55 125 0 70 °C
* On products compliant to MIL-STD-883, Class B, these parameters are based on characterization data, but are not production tested.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54AS194 SN74AS194
UNIT
PARAMETER
TEST CONDITIONS
MIN TYP
†
MAX MIN TYP
†
MAX
UNIT
V
IK
V
CC
= 4.5 V, I
I
= −18 mA −1.2 −1.2 V
V
OH
V
CC
= 4.5 V to 5.5 V, I
OH
= −2 mA V
CC
−2 V
CC
−2 V
V
OL
V
CC
= 4.5 V, I
OL
= 20 mA 0.35 0.5 0.35 0.5 V
I
I
Data, CLK, CLR
V
CC
= 5.5 V,
V
I
= 7 V
0.1 0.1
mA
I
I
Mode, SL, SR
V
CC
= 5.5 V, V
I
= 7 V
0.2 0.2
mA
I
IH
Data, CLK, CLR
V
CC
= 5.5 V,
V
I
= 2.7 V
20 20
A
I
IH
Mode, SL, SR
V
CC
= 5.5 V, V
I
= 2.7 V
40 40
µA
I
IL
Data, CLK, CLR
V
CC
= 5.5 V,
V
I
= 0.4 V
−0.5 −0.5
mA
I
IL
Mode, SL, SR
V
CC
= 5.5 V, V
I
= 0.4 V
−1 −1
mA
I
O
‡
V
CC
= 5.5 V, V
O
= 2.25 V −30 −112 −30 −112 mA
I
CC
V
CC
= 5.5 V
Outputs high 30 49 30 43
mA
I
CC
V
CC
= 5.5 V
Outputs low 38 60 38 53
mA
†
All typical values are at V
CC
= 5 V, T
A
= 25°C.
‡
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
OS
.