HEF4020B Просмотр технического описания (PDF) - NXP Semiconductors.
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HEF4020B Datasheet PDF : 13 Pages
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NXP Semiconductors
HEF4020B
14-stage binary counter
11. Dynamic characteristics
Table 7. Dynamic characteristics
VSS = 0 V; Tamb = 25 °C; for test circuit see Figure 8.
Symbol Parameter
Conditions
VDD
tPHL
HIGH to LOW
CP to Q0;
5V
propagation delay see Figure 7
10 V
15 V
Qn to Qn + 1
5V
10 V
15 V
MR to Qn;
see Figure 7
5V
10 V
15 V
tPLH
LOW to HIGH
CP to Q0;
5V
propagation delay see Figure 7
10 V
15 V
Qn to Qn + 1
5V
10 V
15 V
tt
transition time
see Figure 7
5V
10 V
15 V
tW
pulse width
CP = HIGH;
minimum width;
see Figure 7
5V
10 V
15 V
MR = HIGH;
minimum width;
see Figure 7
5V
10 V
15 V
trec
recovery time
MR input;
5V
see Figure 7
10 V
15 V
fmax
maximum
frequency
see Figure 7
5V
10 V
15 V
Extrapolation formula[1]
78 ns + (0.55 ns/pF) CL
34 ns + (0.23 ns/pF) CL
22 ns + (0.16 ns/pF) CL
53 ns + (0.55 ns/pF) CL
19 ns + (0.23 ns/pF) CL
12 ns + (0.16 ns/pF) CL
153 ns + (0.55 ns/pF) CL
79 ns + (0.23 ns/pF) CL
62 ns + (0.16 ns/pF) CL
78 ns + (0.55 ns/pF) CL
39 ns + (0.23 ns/pF) CL
27 ns + (0.16 ns/pF) CL
43 ns + (0.55 ns/pF) CL
14 ns + (0.23 ns/pF) CL
12 ns + (0.16 ns/pF) CL
10 ns + (1.00 ns/pF) CL
9 ns + (0.42 ns/pF) CL
6 ns + (0.28 ns/pF) CL
Min Typ Max Unit
-
105 210 ns
-
45 90 ns
-
30 65 ns
-
80 160 ns
-
30 60 ns
-
20 40 ns
-
180 360 ns
-
90 180 ns
-
70 140 ns
-
105 210 ns
-
50 95 ns
-
35 70 ns
-
70 140 ns
-
25 50 ns
-
20 40 ns
-
60 120 ns
-
30 60 ns
-
20 40 ns
50 25 -
ns
25 15 -
ns
20 10 -
ns
130 65 -
ns
95 50 -
ns
90 45 -
ns
115 60 -
ns
65 35 -
ns
55 25 -
ns
5 10 -
MHz
13 25 -
MHz
18 35 -
MHz
[1] The typical values of the propagation delay and transition times are calculated from the extrapolation formulas shown (CL in pF).
HEF4020B_4
Product data sheet
Rev. 04 — 4 December 2008
© NXP B.V. 2008. All rights reserved.
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