Datasheet
SN54ALS374A, SN54AS374, SN74ALS374A, SN74AS374
OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS
WITH 3-STATE OUTPUTS
SDAS167C – APRIL 1982 – REVISED NOVEMBER 1999
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions
SN54AS374 SN74AS374
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 0.7 0.8 V
I
OH
High-level output current –12 –15 mA
I
OL
Low-level output current 32 48 mA
T
A
Operating free-air temperature –55 125 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54AS374 SN74AS374
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
CC
= 4.5 V to 5.5 V, I
OH
= –2 mA V
CC
–2 V
CC
–2
V
OH
V
CC
=45V
I
OH
= –12 mA 2.4 3.2
V
V
CC
=
4
.
5
V
I
OH
= –15 mA 2.4 3.3
V
OL
V
CC
=45V
I
OL
= 32 mA 0.29 0.5
V
V
OL
V
CC
=
4
.
5
V
I
OL
= 48 mA 0.34 0.5
V
I
OZH
V
CC
= 5.5 V, V
O
= 2.7 V 50 50 µA
I
OZL
V
CC
= 5.5 V, V
O
= 0.4 V –50 –50 µA
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
OE, CLK
V
CC
=55V
V
I
=04V
–0.5 –0.5
mA
I
IL
Data
V
CC
=
5
.
5
V
,
V
I
=
0
.
4
V
–3 –2
mA
I
O
‡
V
CC
= 5.5 V, V
O
= 2.25 V –30 –112 –30 –112 mA
Outputs high 77 120 77 120
I
CC
V
CC
= 5.5 V
Outputs low 84 128 84 128
mA
Outputs disabled 84 128 84 128
†
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
.
timing requirements over recommended operating free-air temperature range (unless otherwise
noted)
SN54AS374 SN74AS374
UNIT
MIN MAX MIN MAX
UNIT
f
clock
Clock frequency 100* 125 MHz
t
Pulse duration
CLK high 5.5* 4
ns
t
w
P
u
lse
d
u
ration
CLK low 3* 3
ns
t
su
Setup time Data before CLK↑ 3* 2 ns
t
h
Hold time Data after CLK↑ 3* 2 ns
* On products compliant to MIL-PRF-38535, this parameter is not production tested.