Datasheet

74HC_HCT238_3 © NXP B.V. 2007. All rights reserved.
Product data sheet Rev. 03 — 16 July 2007 6 of 18
NXP Semiconductors
74HC238; 74HCT238
3-to-8 line decoder/demultiplexer
9. Static characteristics
Table 6. Static characteristics
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
74HC238
V
IH
HIGH-level
input voltage
V
CC
= 2.0 V 1.5 1.2 - 1.5 - 1.5 - V
V
CC
= 4.5 V 3.15 2.4 - 3.15 - 3.15 - V
V
CC
= 6.0 V 4.2 3.2 - 4.2 - 4.2 - V
V
IL
LOW-level
input voltage
V
CC
= 2.0 V - 0.8 0.5 - 0.5 - 0.5 V
V
CC
= 4.5 V - 2.1 1.35 - 1.35 - 1.35 V
V
CC
= 6.0 V - 2.8 1.8 - 1.8 - 1.8 V
V
OH
HIGH-level
output voltage
V
I
=V
IH
or V
IL
I
O
= −20 µA; V
CC
= 2.0 V 1.9 2.0 - 1.9 - 1.9 - V
I
O
= −20 µA; V
CC
= 4.5 V 4.4 4.5 - 4.4 - 4.4 - V
I
O
= −20 µA; V
CC
= 6.0 V 5.9 6.0 - 5.9 - 5.9 - V
I
O
= −4.0 mA; V
CC
= 4.5 V 3.98 4.32 - 3.84 - 3.7 - V
I
O
= −5.2 mA; V
CC
= 6.0 V 5.48 5.81 - 5.34 - 5.2 - V
V
OL
LOW-level
output voltage
V
I
=V
IH
or V
IL
I
O
=20µA; V
CC
= 2.0 V - 0 0.1 - 0.1 - 0.1 V
I
O
=20µA; V
CC
= 4.5 V - 0 0.1 - 0.1 - 0.1 V
I
O
=20µA; V
CC
= 6.0 V - 0 0.1 - 0.1 - 0.1 V
I
O
= 4.0 mA; V
CC
= 4.5 V - 0.15 0.26 - 0.33 - 0.4 V
I
O
= 5.2 mA; V
CC
= 6.0 V - 0.16 0.26 - 0.33 - 0.4 V
I
I
input leakage
current
V
I
=V
CC
or GND;
V
CC
= 6.0 V
--±0.1 - ±1.0 - ±1.0 µA
I
CC
supply current V
I
=V
CC
or GND; I
O
=0A;
V
CC
= 6.0 V
- - 8.0 - 80 - 160 µA
C
I
input
capacitance
- 3.5 - - - - - pF
74HCT238
V
IH
HIGH-level
input voltage
V
CC
= 4.5 V to 5.5 V 2.0 1.6 - 2.0 - 2.0 - V
V
IL
LOW-level
input voltage
V
CC
= 4.5 V to 5.5 V - 1.2 0.8 - 0.8 - 0.8 V
V
OH
HIGH-level
output voltage
V
I
=V
IH
or V
IL
; V
CC
= 4.5 V
I
O
= −20 µA 4.4 4.5 - 4.4 - 4.4 - V
I
O
= −4.0 mA 3.98 4.32 - 3.84 - 3.7 - V
V
OL
LOW-level
output voltage
V
I
=V
IH
or V
IL
; V
CC
= 4.5 V
I
O
=20µA - 0 0.1 - 0.1 - 0.1 V
I
O
= 4.0 mA - 0.16 0.26 - 0.33 - 0.4 V
I
I
input leakage
current
V
I
=V
CC
or GND;
V
CC
= 5.5 V
--±0.1 - ±1.0 - ±1.0 µA