74HC138 Datasheet, PDF (6/7 Pages) NXP Semiconductors – 3-to-8 line decoder/demultiplexer; inverting

Philips Semiconductors
3-to-8 line decoder/demultiplexer; inverting
Product specification
74HC/HCT138
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
I_CC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆I_CC) for a unit load of 1 is given in the family specifications. To
determine ∆I_CC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
A_n
E_n
E₃
UNIT LOAD COEFFICIENT
1.50
1.25
1.00
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
TEST CONDITIONS
SYMBOL PARAMETER
74HCT
+25
−40 to +85
min. typ. max. min. max.
−40 to +125
min. max.
UNIT
V_CC ^WAVEFORMS
(V)
t_PHL/ t_PLH
propagation delay
A_n to Y_n
20 35
44
53
ns
4.5 Fig.6
t_PHL/ t_PLH
propagation delay
E₃ to Y_n
18 40
50
60
ns
4.5 Fig.6
t_PHL/ t_PLH
propagation delay
E_n to Y_n
19 40
50
60
ns
4.5 Fig.7
t_THL/ t_TLH
output transition
time
7 15
19
22
ns
4.5 Figs 6 and 7
September 1993
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