Datasheet
SCHS279D − DECEMBER 1998 − REVISED OCTOBER 2003
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
CD74HCT4511
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
T
A
= 25°C
T
A
= −55°C
TO 125°C
T
A
= −40°C
TO 85°C
UNIT
PARAMETER
TEST CONDITIONS
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
V
OH
V
I
= V
IH
or V
IL
I
OH
= −20 µA
4.5 V
4.4 4.4 4.4
V
V
OH
V
I
= V
IH
or V
IL
I
OH
= −4 mA
4.5 V
3.98 3.7 3.84
V
V
OL
V
I
= V
IH
or V
IL
I
OL
= 20 µA
4.5 V
0.1 0.1 0.1
V
V
OL
V
I
= V
IH
or V
IL
I
OL
= 4 mA
4.5 V
0.26 0.4 0.33
V
I
I
V
I
= V
CC
to GND 5.5 V ±0.1 ±1 ±1 µA
I
CC
V
I
= V
CC
or 0, I
O
= 0 5.5 V 8 160 80 µA
∆I
CC
†
One input at V
CC
− 2.1 V,
Other inputs at 0 or V
CC
4.5 V to 5.5 V 100 360 490 450 µA
C
i
10 10 10 pF
†
Additional quiescent supply current per input pin, TTL inputs high, 1 unit load. For dual-supply systems, theoretical worst-case
(V
I
= 2.4 V, V
CC
= 5.5 V) specification is 1.8 mA.
HCT INPUT LOADING TABLE
INPUT
UNIT LOADS
‡
LT, LE
1.5
BL, Dn
0.3
‡
Unit load is ∆I
CC
limit specified in electrical
characteristics table, e.g., 360 µA maximum at
25°C.
’HC4511 timing requirements over recommended operating free-air temperature range (unless
otherwise noted) (see Figure 1)
V
CC
T
A
= 25°C
T
A
= −55°C
TO 125°C
T
A
= −40°C
TO 85°C
UNIT
V
CC
MIN MAX MIN MAX MIN MAX
UNIT
2 V 80 120 100
t
w
Pulse duration, LE low
4.5 V
16 24 20
ns
t
w
Pulse duration, LE low
6 V 14 20 17
ns
2 V 60 90 75
t
su
Setup time, BCD inputs before LE↑
4.5 V
12 18 15
ns
t
su
Setup time, BCD inputs before LE↑
6 V 10 15 13
ns
2 V 3 3 3
t
h
Hold time, BCD inputs before LE↑
4.5 V
3 3 3
ns
t
h
Hold time, BCD inputs before LE↑
6 V 3 3 3
ns