HEC40245BN Ver la hoja de datos (PDF) - Philips Electronics
Número de pieza
componentes Descripción
Fabricante
HEC40245BN Datasheet PDF : 6 Pages
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Philips Semiconductors
Octal bus transceiver with 3-state outputs
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
VDD
V
SYMBOL MIN. TYP. MAX.
Propagation delays
An → Bn
HIGH to LOW
An → Bn
LOW to HIGH
Output transition
times
HIGH to LOW
LOW to HIGH
3-state propagation delays
Output disable times
EO → An, Bn
HIGH
LOW
Output enable times
EO → An, Bn
HIGH
LOW
5
10 tPHL
15
5
10 tPLH
15
5
10 tTHL
15
5
10 tTLH
15
5
10 tPHZ
15
5
10 tPLZ
15
5
10 tPZH
15
5
10 tPZL
15
95 190 ns
40 80 ns
30 60 ns
85 170 ns
40 80 ns
30 60 ns
40 80 ns
20 40 ns
15 30 ns
30 60 ns
20 40 ns
15 30 ns
100 200 ns
50 100 ns
40 80 ns
100 200 ns
60 120 ns
50 100 ns
100 200 ns
45 90 ns
35 70 ns
115 230 ns
55 110 ns
45 90 ns
Product specification
HEF40245B
buffers
TYPICAL EXTRAPOLATION
FORMULA
83 ns + (0,24 ns/pF) CL
35 ns + (0,10 ns/pF) CL
26 ns + (0,07 ns/pF) CL
82 ns + (0,06 ns/pF) CL
38 ns + (0,03 ns/pF) CL
29 ns + (0,02 ns/pF) CL
see Fig.6
ALL BUFFERS
SWITCHING
Dynamic power
dissipation per
package (P)
January 1995
VDD
V
TYPICAL FORMULA FOR P (µW)
5
4 250 fi + ∑ (foCL) × VDD2
where
10
17 000 fi + ∑ (foCL) × VDD2
fi = input freq. (MHz)
15
46 000 fi + ∑ (foCL) × VDD2
fo = output freq. (MHz)
CL = load capacitance (pF)
∑ (foCL) = sum of outputs
VDD = supply voltage (V)
5
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