74AHCT138D 데이터 시트보기 (PDF) - Philips Electronics
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74AHCT138D Datasheet PDF : 16 Pages
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Philips Semiconductors
3-to-8 line decoder/demultiplexer; inverting
Product specification
74AHC138;
74AHCT138
AC CHARACTERISTICS
Type 74AHC138
GND = 0 V; tr = tf ≤ 3.0 ns.
SYMBOL PARAMETER
TEST CONDITIONS
WAVEFORMS CL
Tamb (°C)
25
−40 to +85 −40 to +125 UNIT
MIN. TYP. MAX. MIN. MAX. MIN. MAX.
VCC = 3.0 to 3.6 V; note 1
tPHL/tPLH
propagation delay
An to Yn
propagation delay
E3 to Yn
propagation delay
E1, E2 to Yn
propagation delay
An to Yn
propagation delay
E3 to Yn
propagation delay
E1, E2 to Yn
see Figs 5 and 7 15 pF −
−
see Figs 6 and 7
−
see Figs 5 and 7 50 pF −
−
see Figs 6 and 7
−
VCC = 4.5 to 5.5 V; note 2
tPHL/tPLH
propagation delay
An to Yn
propagation delay
E3 to Yn
propagation delay
E1, E2 to Yn
propagation delay
An to Yn
propagation delay
E3 to Yn
propagation delay
E1, E2 to Yn
see Figs 5 and 7 15 pF −
−
see Figs 6 and 7
−
see Figs 5 and 7 50 pF −
−
see Figs 6 and 7
−
6.0 11.4 1.0 13.0 1.0 14.5 ns
5.8 12.8 1.0 15.0 1.0 16.0 ns
5.7 11.4 1.0 13.5 1.0 14.5 ns
8.6 15.8 1.0 18.0 1.0 20.0 ns
8.2 16.3 1.0 18.5 1.0 20.5 ns
8.2 14.9 1.0 17.0 1.0 19.0 ns
4.4 8.1 1.0 9.5 1.0 10.5 ns
4.2 8.1 1.0 9.5 1.0 10.5 ns
4.2 8.1 1.0 9.5 1.0 10.5 ns
6.3 10.1 1.0 11.5 1.0 13.0 ns
6.0 10.1 1.0 11.5 1.0 13.0 ns
6.0 10.1 1.0 11.5 1.0 13.0 ns
Notes
1. Typical values at VCC = 3.3 V.
2. Typical values at VCC = 5.0 V.
1999 Sep 27
8
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