Datasheet
SDAS198B − APRIL 1982 − REVISED AUGUST 1995
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
logic symbol
†
S
5
1J
2
1J
4
1CLK
1K
3
1Q
6
7
C1
11
14
2J
12
2CLK
13
2Q
10
9
1PRE
2PRE
1CLR
2K
1Q
2Q
R
1
1K
15
2CLR
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the D, J, and N packages.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
‡
Supply voltage, V
CC
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
: SN54ALS109A −55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74ALS109A 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range −65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
‡
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
SN54ALS109A SN74ALS109A
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 −0.4 −0.4 mA
I
OL
Low-level output current 4 8 mA
f
clock
Clock frequency 0 30 0 34 MHz
PRE or CLR low 15 15
t
w
Pulse duration
CLK high
16.5 14.5
ns
t
w
Pulse duration
CLK low 16.5 14.5
ns
t
su
Setup time before CLK↑
Data 15 15
ns
t
su
Setup time before CLK↑
PRE or CLR inactive 10 10
ns
t
h
Hold time after CLK↑ Data 0 0 ns
T
A
Operating free-air temperature −55 125 0 70 °C