Datasheet
SDAS159D − APRIL 1982 − REVISED DECEMBER 1994
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
recommended operating conditions
MIN NOM MAX UNIT
V
CC
Supply voltage 4.5 5 5.5 V
V
IH
High-level input voltage 2 V
V
IL
Low-level input voltage 0.8 V
I
OH
High-level output current −0.4 mA
I
OL
Low-level output current 8 mA
f
clock
Clock frequency 50 MHz
t
w
Pulse duration
CLK 10
ns
t
w
Pulse duration
CLR
low 16
ns
t
su
Setup time before CLK↑
Data 6
ns
t
su
Setup time before CLK↑
CLR
inactive 8
ns
t
h
Hold time, data after CLK↑ 2 ns
T
A
Operating free-air temperature 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP
†
MAX UNIT
V
IK
V
CC
= 4.5 V, I
I
= −18 mA −1.5 V
V
OH
V
CC
= 4.5 V to 5.5 V, I
OH
= −0.4 mA V
CC
−2 V
V
OL
V
CC
= 4.5 V
I
OL
= 4 mA 0.25 0.4
V
V
OL
V
CC
= 4.5 V
I
OL
= 8 mA 0.35 0.5
V
I
I
V
CC
= 5.5 V, V
I
= 7 V 0.1 mA
I
IH
V
CC
= 5.5 V, V
I
= 2.7 V 20 µA
I
IL
V
CC
= 5.5 V, V
I
= 0.4 V −0.1 mA
I
O
‡
V
CC
= 5.5 V, V
O
= 2.25 V −30 −112 mA
I
CC
V
CC
= 5.5 V, See Note 1 14 24 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
.
NOTE 1: With 4.5 V applied to the serial input and all other inputs, except the CLK, grounded, I
CC
is measured after a clock transition from
0 to 4.5 V.
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 4.5 V to 5.5 V,
C
L
= 50 pF,
R
L
= 500 Ω,
T
A
= MIN to MAX
§
UNIT
MIN TYP
¶
MAX
f
max
50 75 MHz
t
PHL
CLR Any Q 6 15 20 ns
t
PLH
CLK
Any Q
4 9 16
ns
t
PHL
CLK
Any Q
5 11 17
ns
§
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
¶
All typical values are at V
CC
= 5 V, T
A
= 25°C.