Datasheet

74HC_HCT238_3 © NXP B.V. 2007. All rights reserved.
Product data sheet Rev. 03 — 16 July 2007 7 of 18
NXP Semiconductors
74HC238; 74HCT238
3-to-8 line decoder/demultiplexer
10. Dynamic characteristics
I
CC
supply current V
I
=V
CC
or GND;
V
CC
= 5.5 V; I
O
=0A
- - 8.0 - 80 - 160 µA
∆I
CC
additional
supply current
per input pin;
V
I
=V
CC
− 2.1 V;
other inputs at V
CC
or GND;
V
CC
= 4.5 V to 5.5 V;
I
O
=0A
An inputs - 70 252 - 315 - 343 µA
E1, E2 inputs - 40 144 - 180 - 196 µA
E3 input - 145 522 - 653 - 711 µA
C
I
input
capacitance
- 3.5 - - - - - pF
Table 6. Static characteristics
…continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions 25 °C −40 °C to +85 °C −40 °C to +125 °C Unit
Min Typ Max Min Max Min Max
Table 7. Dynamic characteristics
GND = 0 V; test circuit see Figure 8.
Symbol Parameter Conditions 25 °C −40 °C to +125 °C
Min Typ Max Max
(85 °C)
Max
(125 °C)
Unit
74HC238
t
pd
propagation delay An to Yn; see Figure 6
[1]
V
CC
= 2.0 V - 47 150 190 225 ns
V
CC
= 4.5 V - 17 30 38 45 ns
V
CC
= 5.0 V; C
L
=15pF - 14 - - - ns
V
CC
= 6.0 V - 14 26 33 38 ns
E3 to Yn; see
Figure 6
[1]
V
CC
= 2.0 V - 52 160 200 240 ns
V
CC
= 4.5 V - 19 32 40 48 ns
V
CC
= 5.0 V; C
L
=15pF - 16 - - - ns
V
CC
= 6.0 V - 15 27 34 41 ns
En to Yn or see Figure 7
[1]
V
CC
= 2.0 V - 50 155 195 235 ns
V
CC
= 4.5 V - 18 31 39 47 ns
V
CC
= 5.0 V; C
L
=15pF - 17 - - - ns
V
CC
= 6.0 V - 14 26 33 40 ns
t
t
transition time see Figure 6 and Figure 7
[2]
V
CC
= 2.0 V - 19 75 95 110 ns
V
CC
= 4.5 V - 7 15 19 22 ns
V
CC
= 6.0 V - 6 13 16 19 ns
C
PD
power dissipation
capacitance
per package; V
I
= GND to V
CC
[3]
-72- - -pF