Datasheet

SN54ABT273, SN74ABT273
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH CLEAR
SCBS185B – FEBRUARY 1991 – REVISED JANUARY 1997
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 1)
V
CC
= 5 V,
T
A
= 25°C
SN54ABT273 SN74ABT273
UNIT
MIN MAX MIN MAX MIN MAX
f
clock
Clock frequency 0 150 0 150 0 150 MHz
t
Pulse duration
CLK high or low 3.3 3.3 3.3
ns
t
w
P
u
lse
d
u
ration
CLR low 3.3 3.3 3.3
ns
↑
Data high 2 2 2
t
su
Setup time before CLK
↑
Data low 2.5 2.5 2.5
ns
CLR high 2 2 2
t
h
Hold time after CLK↑ Data high or low 1.2
†
1.4
†
1.2
†
ns
†
This data sheet limit may vary among suppliers.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C
L
= 50 pF (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 5 V,
T
A
= 25°C
SN54ABT273
UNIT
(INPUT)
(OUTPUT)
MIN MAX MIN MAX
f
max
150 150 MHz
t
PLH
CLK
Q
2.5 6 2.5 7
ns
t
PHL
CLK
Q
3.3 6.8 3.3 7.5
ns
t
PHL
CLR Q 2.5 7.5
†
2.5 8.2 ns
†
This data sheet limit may vary among suppliers.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C
L
= 50 pF (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 5 V,
T
A
= 25°C
SN74ABT273
UNIT
(INPUT)
(OUTPUT)
MIN MAX MIN MAX
f
max
150 150 MHz
t
PLH
CLK
Q
2.5 6 2.5 6.5
ns
t
PHL
CLK
Q
3.3 6.8 3.3 7.3
ns
t
PHL
CLR Q 2.5 6.7
†
2.5 7.4
†
ns
†
This data sheet limit may vary among suppliers.