Datasheet

December 1990 10
Philips Semiconductors Product specification
BCD to 7-segment latch/decoder/driver 74HC/HCT4511
AC WAVEFORMS
Fig.8 Waveforms showing the input (D
n
, LT) to
output (Q
n
) propagation delays and the
output transition times.
(1) HC : V
M
= 50%; V
I
= GND to V
CC
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
Fig.9 Waveforms showing the input (LE) to output
(Q
n
) propagation delays and the latch
enable pulse width.
(1) HC : V
M
= 50%; V
I
= GND to V
CC
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
Fig.10 Waveforms showing the input (BI) to output
(Q
n
) propagation delays.
(1) HC : V
M
= 50%; V
I
= GND to V
CC
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
Fig.11 Waveforms showing the data set-up and
hold times for D
n
input to LE input.
The shaded areas indicate when the input is
permitted to change for predictable output
performance.
(1) HC : V
M
= 50%; V
I
= GND to V
CC
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.