HEC40244B 查看數據表（PDF） - Philips Electronics
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HEC40244B Datasheet PDF : 6 Pages
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Philips Semiconductors
Octal buffers with 3-state outputs
Product specification
HEF40244B
buffers
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
VDD
V
SYMBOL MIN. TYP. MAX.
TYPICAL EXTRAPOLATION
FORMULA
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 83 ns + (0,24 ns/pF) CL
40
80 ns 35 ns + (0,10 ns/pF) CL
30
60 ns 26 ns + (0,07 ns/pF) CL
85 170 ns 82 ns + (0,06 ns/pF) CL
40
80 ns 38 ns + (0,03 ns/pF) CL
30
60 ns 29 ns + (0,02 ns/pF) CL
40 80 ns
20 40 ns
15 30 ns
30 60 ns
see Fig.6
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
January 1995
5
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