HEF40240BU Ver la hoja de datos (PDF) - Philips Electronics
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HEF40240BU Datasheet PDF : 6 Pages
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Philips Semiconductors
Octal inverting buffers with 3-state outputs
Product specification
HEF40240B
buffers
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
PARAMETER
VDD
V
SYMBOL MIN. TYP. MAX. UNIT
Propagation delays
IAn/Bn → OAn/Bn
HIGH to LOW
IAn/Bn → OAn/Bn
LOW to HIGH
Output transition
times
HIGH to LOW
LOW to HIGH
3-state propagation delays
Output disable times
EO → OAn/Bn
HIGH
LOW
Output enable times
EO → OAn/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
70 140 ns
35 70 ns
30 60 ns
75 150 ns
40 80 ns
30 60 ns
80 160 ns
35 70 ns
30 60 ns
90 180 ns
40 80 ns
30 60 ns
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
January 1995
5
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