74HC138_12 Datasheet, PDF (9/19 Pages) NXP Semiconductors – 3-to-8 line decoder/demultiplexer; inverting

NXP Semiconductors
11. Waveforms
74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
V_CC
An, E3
input
GND
V_OH
Yn
output
V_OL
V_M
t_PHL
V_M
t_THL
t_PLH
t_TLH
mna373
Fig 6.
Measurement points are given in Table 8.
V_OL and V_OH are typical voltage output levels that occur with the output load.
Propagation delay input (An) and enable input (E3) to output (Yn) and transition time output (Yn)
V_CC
E1, E2
input
GND
Yn
output
V_OH
V_OL
V_M
t_PHL
V_M
t_THL
t_PLH
t_TLH
mna374
Fig 7.
Measurement points are given in Table 8.
V_OL and V_OH are typical voltage output levels that occur with the output load.
Propagation delay enable input (En) to output (Yn) and transition time output (Yn)
Table 8. Measurement points
Type
74HC138
74HCT138
Input
V_M
0.5V_CC
1.3 V
Output
V_M
0.5V_CC
1.3 V
74HC_HCT138
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 27 June 2012
© NXP B.V. 2012. All rights reserved.
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