Datasheet
SN54ALS174, SN54ALS175, SN54AS174, SN54AS175B
SN74ALS174, SN74ALS175, SN74AS174, SN74AS175B
HEX/QUADRUPLE D-TYPE FLIP-FLOPS WITH CLEAR
SDAS207E - APRIL 1982 - REVISED MAY 2002
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS
SN54ALS174
SN54ALS175
SN74ALS174
SN74ALS175
UNIT
MIN TYP
†
MAX MIN TYP
†
MAX
V
IK
V
CC
= 4.5 V, I
I
= –18 mA –1.5 –1.5 V
V
OH
V
CC
= 4.5 V to 5.5 V, I
OH
= –0.4 mA V
CC
–2 V
CC
–2 V
V
OL
V
CC
=45V
I
OL
= 4 mA 0.25 0.4 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 0.1 mA
I
IH
V
CC
= 5.5 V, V
I
= 2.7 V 20 20 µA
I
IL
All others
V
CC
=55V
V
I
=04V
–0.1 –0.1
mA
I
IL
CLK
V
CC
=
5
.
5
V
,
V
I
=
0
.
4
V
–0.15
mA
I
O
‡
V
CC
= 5.5 V, V
O
= 2.25 V –20 –112 –30 –112 mA
I
CC
’ALS174
V
CC
=55V
See Note 3
11 19 11 19
mA
I
CC
’ALS175
V
CC
=
5
.
5
V
,
See
Note
3
8 14 9 14
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 3: I
CC
is measured with D inputs and CLR
grounded, and CLK at 4.5 V.
timing requirements over recommended operating free-air temperature range (unless otherwise
noted)
SN54ALS174
SN54ALS175
SN74ALS174
SN74ALS175
UNIT
MIN MAX MIN MAX
f
clock
Clock frequency 40 50 MHz
CLR low
15 10
t
w
Pulse duration
CLK high
12.5 10
ns
CLK low
12.5 10
t
Set p time before CLK↑
Data 15 10
ns
t
su
S
e
t
up
ti
me
b
e
f
ore
CLK↑
CLR inactive 8 6
ns
t
h
Hold time, data after CLK↑ 0 0 ns
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
PARAMETER
(INPUT) (OUTPUT)
SN54ALS174
SN54ALS175
SN74ALS174
SN74ALS175
UNIT
MIN MAX MIN MAX
f
max
40 50 MHz
t
PLH
CLR
An
y
Q
3 20 5 18
ns
t
PHL
CLR
y
(or Q, ’ALS175)
5 30 8 23
ns
t
PLH
CLK
Any Q
3 20 3 15
ns
t
PHL
CLK
y
(or Q, ’ALS175)
5 24 5 17
ns
§
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.