Datasheet

December 1990 9
Philips Semiconductors Product specification
BCD to 7-segment latch/decoder/driver 74HC/HCT4511
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
=t
f
= 6 ns; C
L
= 50 pF
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
D
n
to Q
n
28 60 75 90 ns 4.5 Fig.8
t
PHL
/ t
PLH
propagation delay
LE to Q
n
27 54 68 81 ns 4.5 Fig.9
t
PHL
/ t
PLH
propagation delay
BI to Q
n
23 44 55 66 ns 4.5 Fig.10
t
PHL
/ t
PLH
propagation delay
LT to Q
n
16 30 38 45 ns 4.5 Fig.8
t
THL
/ t
TLH
output transition time 7 15 19 22 ns 4.5 Figs 8, 9 and
10
t
W
latch enable pulse
width
LOW
16 5 20 24 ns 4.5 Fig.9
t
su
set-up time
D
n
to LE
12 5 15 18 ns 4.5 Fig.11
t
h
hold time
D
n
to LE
0 −4 0 0 ns 4.5 Fig.11