HEF4521B 查看數據表（PDF） - NXP Semiconductors.
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HEF4521B Datasheet PDF : 18 Pages
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NXP Semiconductors
HEF4521B
24-stage frequency divider and oscillator
11. 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
tPHL
HIGH to LOW
A2 to Q18;
5 V [1] 923 ns + (0.55 ns/pF)CL
propagation delay see Figure 5
10 V
339 ns + (0.23 ns/pF)CL
15 V
212 ns + (0.16 ns/pF)CL
Qn to Qn + 1;
see Figure 5
5V
10 V
13 ns + (0.55 ns/pF)CL
4 ns + (0.23 ns/pF)CL
15 V
2 ns + (0.16 ns/pF)CL
MR to Qn
5V
93 ns + (0.55 ns/pF)CL
10 V
44 ns + (0.23 ns/pF)CL
15 V
32 ns + (0.16 ns/pF)CL
A1 to Y1;
see Figure 5
5V
10 V
63 ns + (0.55 ns/pF)CL
24 ns + (0.23 ns/pF)CL
15 V
17 ns + (0.16 ns/pF)CL
tPLH
LOW to HIGH
A2 to Q18;
5 V [1] 923 ns + (0.55 ns/pF)CL
propagation delay see Figure 5
10 V
339 ns + (0.23 ns/pF)CL
15 V
212 ns + (0.16 ns/pF)CL
Qn to Qn + 1;
see Figure 5
5V
10 V
13 ns + (0.55 ns/pF)CL
4 ns + (0.23 ns/pF)CL
15 V
2 ns + (0.16 ns/pF)CL
A1 to Y1;
see Figure 5
5V
10 V
33 ns + (0.55 ns/pF)CL
19 ns + (0.23 ns/pF)CL
15 V
12 ns + (0.16 ns/pF)CL
tt
transition time
Qn; see Figure 5 5 V [1] 10 ns + (1.00 ns/pF)CL
10 V
9 ns + (0.42 ns/pF)CL
15 V
6 ns + (0.28 ns/pF)CL
tW
pulse width
A2 HIGH;
minimum width;
see Figure 5
5V
10 V
15 V
MR HIGH;
minimum width;
see Figure 5
5V
10 V
15 V
trec
recovery time
MR; see Figure 5 5 V
10 V
15 V
fmax
maximum frequency A1; see Figure 5 5 V
10 V
15 V
Min Typ Max Unit
-
950 1900 ns
-
350 700 ns
-
220 440 ns
-
40 80 ns
-
15 30 ns
-
10 20 ns
-
120 240 ns
-
55 110 ns
-
40 80 ns
-
90 180 ns
-
35 70 ns
-
25 50 ns
-
950 1900 ns
-
350 700 ns
-
220 440 ns
-
40 80 ns
-
15 30 ns
-
10 20 ns
-
60 120 ns
-
30 60 ns
-
20 40 ns
-
60 120 ns
-
30 60 ns
-
20 40 ns
80 40 -
ns
40 20 -
ns
30 15 -
ns
70 35 -
ns
40 20 -
ns
30 15 -
ns
+20 10 -
ns
+15 5 -
ns
15 0
-
ns
6
12 -
MHz
12 25 -
MHz
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
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 21 November 2011
© NXP B.V. 2011. All rights reserved.
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