Datasheet

SN54HCT377, SN74HCT377
OCTAL D-TYPE FLIP-FLOPS
WITH CLOCK ENABLE
SCLS067D – NOVEMBER 1988 – REVISED MARCH 2003
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
timing requirements over recommended operating free-air temperature range (unless otherwise
noted)
V
CC
T
A
= 25°C SN54HCT377 SN74HCT377
UNIT
V
CC
MIN MAX MIN MAX MIN MAX
UNIT
f
lk
Clock frequency
4.5 V 25 17 20
MHz
f
clock
Clock
frequency
5.5 V 30 19 22
MHz
t
Pulse duration
CLK high or low
4.5 V 20 30 25
ns
t
w
Pulse
duration
CLK
high
or
low
5.5 V 18 28 23
ns
↑
Data
4.5 V 12 18 15
t
Setu
p
time before CLK↑
Data
5.5 V 10 17 14
ns
t
su
Setup
time
before
CLK↑
CLKEN high or low
4.5 V 12 18 15
ns
CLKEN
hi
g
h
or
l
ow
5.5 V 10 17 14
↑
Data
4.5 V 3 3 3
t
h
Hold time data after CLK↑
Data
5.5 V 3 3 3
ns
t
h
Hold
time
data
after
CLK↑
CLKEN inactive or active
4.5 V 5 5 5
ns
CLKEN
inacti
v
e
or
acti
v
e
5.5 V 5 5 5
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF (unless
otherwise noted) (see Figure 1)
FROM
TO
SN54HCT377
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
T
A
= 25°C
MIN
MAX
UNIT
(INPUT)
(OUTPUT)
MIN TYP MAX
MIN
MAX
f
4.5 V 25 31 17
MHz
f
max
5.5 V 30 37 19
MHz
t
d
CLK
Any
4.5 V 15 30 45
ns
t
pd
CLK
Any
5.5 V 12 28 40
ns
t
t
Any
4.5 V 8 15 22
ns
t
t
Any
5.5 V 6 14 21
ns
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF (unless
otherwise noted) (see Figure 1)
FROM
TO
SN74HCT377
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
T
A
= 25°C
MIN
MAX
UNIT
(INPUT)
(OUTPUT)
MIN TYP MAX
MIN
MAX
f
4.5 V 25 31 20
MHz
f
max
5.5 V 30 37 22
MHz
t
d
CLK
Any
4.5 V 15 30 38
ns
t
pd
CLK
Any
5.5 V 12 28 35
ns
t
t
Any
4.5 V 8 15 19
ns
t
t
Any
5.5 V 6 14 17
ns
operating characteristics, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance No load 30 pF
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design phase of development. Characteristic data and other
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change or discontinue these products without notice.