Philips Semiconductors
Dual 2-to-4 line decoder/demultiplexer
Product specification
74HC/HCT139
DC CHARACTERISTICS FOR HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications.
To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
1An
2An
nE
UNIT LOAD COEFFICIENT
0.70
0.70
1.35
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tf = tf = 6 ns; CL = 50 pF
Tamb (°C)
SYMBOL PARAMETER
74HCT
+25
−40 to +85
min. typ. max. min. max.
tPHL/ tPLH
propagation delay
nAn to Yn
16 34
43
tPHL/ tPLH
propagation delay
nE to nYn
16 34
43
tTHL/ tTLH
output transition
time
7 15
19
−40 to +125
min. max.
51
51
22
UNIT
ns
ns
ns
TEST CONDITIONS
VCC WAVEFORMS
(V)
4.5 Fig.6
4.5 Fig.7
4.5 Figs 6 and 7
September 1993
6