74AHC244 Ver la hoja de datos (PDF) - Philips Electronics
Número de pieza
componentes Descripción
fabricante
74AHC244 Datasheet PDF : 16 Pages
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Philips Semiconductors
Octal buffer/line driver; 3-state
Product specification
74AHC244; 74AHCT244
AC CHARACTERISTICS
Type 74AHC244
GND = 0 V; tr = tf ≤ 3.0 ns.
SYMBOL PARAMETER
TEST CONDITIONS
WAVEFORMS CL
MIN.
25
TYP.
Tamb (°C)
−40 to +85 −40 to +125 UNIT
MAX. MIN. MAX. MIN. MAX.
VCC = 3.0 to 3.6 V; note 1
tPHL/tPLH
tPZL/tPZH
tPLZ/tPHZ
tPHL/tPLH
tPZL/tPZH
tPLZ/tPHZ
propagation delay
nAn to nYn
propagation delay
nOE to nYn
propagation delay
nOE to nYn
propagation delay
nAn to nYn
propagation delay
nOE to nYn
propagation delay
nOE to nYn
VCC = 4.5 to 5.5 V; note 2
tPHL/tPLH
tPZL/tPZH
tPLZ/tPHZ
tPHL/tPLH
tPZL/tPZH
tPLZ/tPHZ
propagation delay
nAn to nYn
propagation delay
nOE to nYn
propagation delay
nOE to nYn
propagation delay
nAn to nYn
propagation delay
nOE to nYn
propagation delay
nOE to nYn
see Figs 4 and 6 15 pF −
see Figs 5 and 6
−
−
see Figs 4 and 6 50 pF −
see Figs 5 and 6
−
−
see Figs 4 and 6 15 pF −
see Figs 5 and 6
−
−
see Figs 4 and 6 50 pF −
see Figs 5 and 6
−
−
5.0 8.4 1.0 10.0 1.0 10.5 ns
6.5 10.6 1.0 12.5 1.0 13.5 ns
5.5 9.7 1.0 11.0 1.0 12.5 ns
7.0 11.9 1.0 13.5 1.0 15.0 ns
7.5 14.1 1.0 16.0 1.0 18.0 ns
10.0 14.0 1.0 16.0 1.0 17.5 ns
3.4 5.5 1.0 6.5 1.0 7.0 ns
4.0 7.3 1.0 8.5 1.0 9.5 ns
4.8 7.2 1.0 8.5 1.0 9.0 ns
5.0 7.5 1.0 8.5 1.0 9.5 ns
5.5 9.3 1.0 10.5 1.0 12.0 ns
7.0 9.2 1.0 10.5 1.0 11.5 ns
Notes
1. Typical values at VCC = 3.3 V.
2. Typical values at VCC = 5.0 V.
1999 Sep 28
8
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