Datasheet
SN54ABT377, SN74ABT377A
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH CLOCK ENABLE
SCBS156E – FEBRUARY 1991 – REVISED JANUARY 1997
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
T
A
= 25°C SN54ABT377 SN74ABT377A
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP
†
MAX MIN MAX MIN MAX
UNIT
V
IK
V
CC
= 4.5 V, I
I
= –18 mA –1.2 –1.2 –1.2 V
V
CC
= 4.5 V, I
OH
= –3 mA
2.5 2.5 2.5
V
OH
V
CC
= 5 V, I
OH
= –3 mA
3 3 3
V
V
OH
V
CC
=45V
I
OH
= –24 mA
2 2
V
V
CC
=
4
.
5
V
I
OH
= –32 mA
2* 2
V
OL
V
CC
=45V
I
OL
= 48 mA
0.55 0.55
V
V
OL
V
CC
=
4
.
5
V
I
OL
= 64 mA
0.55* 0.55
V
V
hys
100 mV
I
I
V
CC
= 5.5 V, V
I
= V
CC
or GND ±1 ±1 ±1 µA
I
off
V
CC
= 0, V
I
or V
O
≤ 4.5 V ±100 ±100 µA
I
CEX
V
CC
= 5.5 V, V
O
= 5.5 V Outputs high 50 50 50 µA
I
O
‡
V
CC
= 5.5 V, V
O
= 2.5 V –50 –100 –180 –50 –180 –50 –180 mA
I
CC
V
CC
= 5.5 V, I
O
= 0,
Outputs high
1 250 250 250
µA
I
CC
CC
,
O
,
V
I
= V
CC
or GND
Outputs low
24 30 30 30
mA
∆I
CC
§
V
CC
= 5.5 V, One input at 3.4 V,
Other inputs at V
CC
or GND
1.5 1.5 1.5 mA
C
i
V
I
= 2.5 V or 0.5 V 3.5 pF
* On products compliant to MIL-PRF-38535, this parameter does not apply.
†
All typical values are at V
CC
= 5 V.
‡
Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
§
This is the increase in supply current for each input that is at the specified TTL voltage level rather than V
CC
or GND.
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 1)
SN54ABT377
V
CC
= 5 V,
T
A
= 25°C
MIN MAX
UNIT
MIN MAX
f
clock
Clock frequency 0 150 0 150 MHz
t
w
Pulse duration CLK high or low 3.3 3.3 ns
t
su
Setu
p
time before CLK↑
Data high or low 2 2.5
ns
t
su
Setup
time
before
CLK↑
CLKEN high or low 3 3
ns
t
h
Hold time after CLK↑
Data high or low 1.8
¶
1.8
¶
ns
t
h
H
o
ld
ti
me a
ft
er
CLK↑
CLKEN high or low 1.8
¶
1.8
¶
ns
¶
This data sheet limit may vary among suppliers.