Datasheet

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  
SCHS279D − DECEMBER 1998 − REVISED OCTOBER 2003
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
CD74HCT4511
timing requirements over recommended operating free-air temperature range V
CC
= 4.5 V (unless
otherwise noted) (see Figure 2)
T
A
= 25°C
T
A
= −55°C
TO 125°C
T
A
= −40°C
TO 85°C
UNIT
MIN MAX MIN MAX MIN MAX
UNIT
t
w
Pulse duration, LE low 16 24 20 ns
t
su
Setup time, BCD inputs before LE↑ 16 24 20 ns
t
h
Hold time, BCD inputs before LE↑ 5 5 5 ns
CD74HCT4511
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figure 2)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
LOAD
CAPACITANCE
V
CC
T
A
= 25°C
T
A
= −55°C
TO 125°C
T
A
= −40°C
TO 85°C
UNIT
PARAMETER
(INPUT)
(OUTPUT)
CAPACITANCE
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
D
n
Output
C
L
= 50 pF 4.5 V 60 90 75
D
n
Output
C
L
= 15 pF 5 V 25
LE
Output
C
L
= 50 pF 4.5 V 54 81 68
t
pd
LE
Output
C
L
= 15 pF 5 V 23
ns
t
pd
BL
Output
C
L
= 50 pF 4.5 V 44 66 55
ns
BL
Output
C
L
= 15 pF 5 V 18
LT
Output
C
L
= 50 pF 4.5 V 33 50 41
LT
Output
C
L
= 15 pF 5 V 13
t
t
Any C
L
= 50 pF 4.5 V 15 22 19 ns
operating characteristics, V
CC
= 5 V, T
A
= 25°C
PARAMETER TYP
UNIT
C
pd
†
Power dissipation capacitance
’HC4511 114
pF
C
pd
†
Power dissipation capacitance
CD74HCT4511 110
pF
†
C
pd
is used to determine the dynamic power consumption, per package.
P
D
= C
pd
V
CC
2
f
i
+ ∑ C
L
V
CC
2
f
o
where: f
i
= input frequency
f
o
= output frequency
C
L
= output load capacitance
V
CC
= supply voltage