74HCT154 Datasheet, PDF (14/22 Pages) NXP Semiconductors – 4-to-16 line decoder/demultiplexer

Philips Semiconductors
4-to-16 line decoder/demultiplexer
Product specification
74HC154; 74HCT154
Type 74HCT154
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF.
SYMBOL
PARAMETER
T_amb = 25 °C
t_PHL/t_PLH
propagation delay An to Yn
propagation delay En to Yn
t_THL/t_TLH
output transition time
T_amb = −40 °C to +85 °C
t_PHL/t_PLH
propagation delay An to Yn
propagation delay En to Yn
t_THL/t_TLH
output transition time
T_amb = −40 °C to +125 °C
t_PHL/t_PLH
propagation delay An to Yn
propagation delay En to Yn
t_THL/t_TLH
output transition time
TEST CONDITIONS
WAVEFORMS
V_CC (V)
MIN.
see Figs 7 and 9 4.5
−
see Figs 8 and 9 4.5
−
see Figs 7, 8 and 9 4.5
−
see Figs 7 and 9 4.5
−
see Figs 8 and 9 4.5
−
see Figs 7, 8 and 9 4.5
−
see Figs 7 and 9 4.5
−
see Figs 8 and 9 4.5
−
see Figs 7, 8 and 9 4.5
−
TYP.
16
15
7
−
−
−
−
−
−
MAX. UNIT
35
ns
32
ns
15
ns
44
ns
40
ns
19
ns
53
ns
48
ns
22
ns
AC WAVEFORMS
V_I
An input
V_M
GND
t _PLH
V_OH
90 %
Yn output
V_M
V_OL
10 %
t _THL
V_M
t _PLH
V_M
10 %
90 %
t _TLH
001aab073
V_I
En input
GND
V_OH
Yn output
V_OL
V_M
t_PHL
90 %
V_M
10 %
t _THL
V_M
t_PLH
V_M
10 %
90 %
t _TLH
001aab074
For 74HC154: V_M = 50 %; V_I = GND to V_CC.
For 74HCT154: V_M = 1.3 V; V_I = GND to 3 V.
Fig.7 The input (An) to output (Yn) propagation
delays and the output transition times.
For 74HC154: V_M = 50 %; V_I = GND to V_CC.
For 74HCT154: V_M = 1.3 V; V_I = GND to 3 V.
Fig.8 The enable input (En) to output (Yn)
propagation delays and the output transition
times.
2004 Oct 12
14