HEF4521B(2009) 查看數據表（PDF） - NXP Semiconductors.
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HEF4521B Datasheet PDF : 17 Pages
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NXP Semiconductors
HEF4521B
24-stage frequency divider and oscillator
12. Dynamic characteristics
Table 8. Dynamic characteristics
VSS = 0 V; Tamb = 25 °C; for test circuits see Figure 6; unless otherwise specified.
Symbol Parameter
Conditions
VDD
Extrapolation formula Min Typ Max Unit
tPHL
HIGH to LOW
A2 to Q18;
5 V [1] 923 ns + (0.55 ns/pF) CL -
950 1900 ns
propagation delay see Figure 5
10 V
339 ns + (0.23 ns/pF) CL -
350 700 ns
15 V
212 ns + (0.16 ns/pF) CL -
220 440 ns
Qn to Qn + 1;
see Figure 5
5V
10 V
13 ns + (0.55 ns/pF) CL -
4 ns + (0.23 ns/pF) CL -
40
80 ns
15
30 ns
15 V
2 ns + (0.16 ns/pF) CL -
10
20 ns
MR to Qn
5V
93 ns + (0.55 ns/pF) CL -
120 240 ns
10 V
44 ns + (0.23 ns/pF) CL -
55 110 ns
15 V
32 ns + (0.16 ns/pF) CL -
40
80 ns
A1 to Y1;
see Figure 5
5V
10 V
63 ns + (0.55 ns/pF) CL -
24 ns + (0.23 ns/pF) CL -
90 180 ns
35
70 ns
15 V
17 ns + (0.16 ns/pF) CL -
25
50 ns
tPLH
LOW to HIGH
A2 to Q18;
5 V [1] 923 ns + (0.55 ns/pF) CL -
950 1900 ns
propagation delay see Figure 5
10 V
339 ns + (0.23 ns/pF) CL -
350 700 ns
15 V
212 ns + (0.16 ns/pF) CL -
220 440 ns
Qn to Qn + 1;
see Figure 5
5V
10 V
13 ns + (0.55 ns/pF) CL -
4 ns + (0.23 ns/pF) CL -
40
80 ns
15
30 ns
15 V
2 ns + (0.16 ns/pF) CL -
10
20 ns
A1 to Y1;
see Figure 5
5V
10 V
33 ns + (0.55 ns/pF) CL -
19 ns + (0.23 ns/pF) CL -
60 120 ns
30
60 ns
15 V
12 ns + (0.16 ns/pF) CL -
20
40 ns
tt
transition time
Qn; see Figure 5 5 V [1] 10 ns + (1.00 ns/pF) CL -
60 120 ns
10 V
9 ns + (0.42 ns/pF) CL -
30
60 ns
15 V
6 ns + (0.28 ns/pF) CL -
20
40 ns
tW
pulse width
A2 HIGH;
minimum width;
see Figure 5
5V
10 V
15 V
80 40 -
ns
40 20 -
ns
30 15 -
ns
MR HIGH;
minimum width;
see Figure 5
5V
10 V
15 V
70 35 -
ns
40 20 -
ns
30 15 -
ns
trec
recovery time
MR; see Figure 5 5 V
10 V
+20 −10 -
ns
+15 −5 -
ns
15 V
15
0-
ns
fmax
maximum frequency A1; see Figure 5 5 V
10 V
6 12 -
12 25 -
MHz
MHz
15 V
17 35 -
MHz
[1] The typical values of the propagation delay and transition times are calculated from the extrapolation formulas shown (CL in pF).
HEF4521B_5
Product data sheet
Rev. 05 — 5 November 2009
© NXP B.V. 2009. All rights reserved.
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