September 1993 7
Philips Semiconductors Product specification
4-to-16 line decoder/demultiplexer with
input latches
74HC/HCT4514
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: standard
I
CC
category: MSI
Note to HCT types
The value of additional quiescent supply current (∆I
CC
) for a unit load of 1 is given in the family specifications.
To determine ∆I
CC
per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
=t
f
= 6 ns; C
L
= 50 pF
INPUT UNIT LOAD COEFFICIENT
A
n
LE
E
0.65
1.40
1.00
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HCT
V
CC
(V)
WAVEFORMS
+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
t
PHL
/ t
PLH
propagation delay
A
n
to Q
n
30 55 69 83 ns 4.5 Fig.6
t
PHL
/ t
PLH
propagation delay
LE to Q
n
29 50 63 75 ns 4.5 Fig.6
t
PHL
/ t
PLH
propagation delay
E to Q
n
17 40 50 60 ns 4.5 Fig.6
t
THL
/ t
TLH
output transition time
7 15 19 22 ns 4.5 Fig.6
t
W
latch enable pulse width
HIGH
16 4 20 24 ns 4.5 Fig.7
t
su
set-up time
A
n
to LE
18 9 23 27 ns 4.5 Fig.7
t
h
hold time
A
n
to LE
3 −3 3 3 ns 4.5 Fig.7
