Datasheet
SN54273, SN54LS273, SN74273, SN74LS273
OCTAL D-TYPE FLIP-FLOP WITH CLEAR
SDLS090 – OCTOBER 1976 – REVISED MARCH 1988
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
CC
(see Note 1) 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
: SN54273 –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74273 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NOTE 1: Voltage values are with respect to network ground terminal.
recommended operating conditions
SN54273 SN74273
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
Supply voltage, V
CC
4.5 5 5.5 4.75 5 5.25 V
High-level output current, I
OH
–800 –800 µA
Low-level output current, I
OL
16 16 mA
Clock frequency, f
clock
0 30 0 30 MHz
Width of clock or clear pulse, t
w
16.5 16.5 ns
Setu
p
time t
Data input 20↑ 20↑
ns
Set
u
p
time
,
t
su
Clear inactive state 25↑ 25↑
ns
Data hold time, t
h
5↑ 5↑ ns
Operating free-air temperature, T
A
–55 125 0 70 °C
↑The arrow indicates that the rising edge of the clock pulse is used for reference.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS
†
MIN TYP
‡
MAX UNIT
V
IH
High-level input voltage 2 V
V
IL
Low-level input voltage 0.8 V
V
IK
Input clamp voltage V
CC
= MIN, I
I
= –12 mA –1.5 V
V
OH
High-level output voltage
V
CC
= MIN,
V
IL
= 0.8 V,
V
IH
= 2 V,
I
OH
= –800 µA
2.4 3.4 V
V
OL
Low-level output voltage
V
CC
= MIN,
V
IL
= 0.8 V,
V
IH
= 2 V,
I
OH
= 16 mA
0.4 V
I
I
Input current at maximum input voltage V
CC
= MAX, V
I
= 5.5 V 1 mA
I
IH
High level in
p
ut current
Clear
V
CC
= MAX
V
I
=24V
80
µA
I
IH
High
-
le
v
el
inp
u
t
c
u
rrent
Clock or D
V
CC
=
MAX
,
V
I
=
2
.
4
V
40
µ
A
I
IL
Low level in
p
ut current
Clear
V
CC
= MAX
V
I
=04V
–3.2
mA
I
IL
Lo
w-
le
v
el
inp
u
t
c
u
rrent
Clock or D
V
CC
=
MAX
,
V
I
=
0
.
4
V
–1.6
mA
I
OS
Short-circuit output current
§
V
CC
= MAX –18 –57 mA
I
CC
Supply current V
CC
= MAX, See Note 2 62 94 mA
†
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.
§
Not more than one output should be shorted at a time.
NOTE 2: With all outputs open and 4.5 V applied to all data and clear inputs, I
CC
is measured after a momentary ground, then 4.5 V, is applied
to clock.