MC14521 ONSEMI [ON Semiconductor], MC14521 Datasheet - Page 4

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MC14521

Manufacturer Part Number
MC14521
Description
24-Stage Frequency Divider
Manufacturer
ONSEMI [ON Semiconductor]
Datasheet

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Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î
Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î
7. The formulas given are for the typical characteristics only at 25 _ C.
8. Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.
SWITCHING CHARACTERISTICS
Output Rise and Fall Time (Counter Outputs)
Propagation Delay Time
Propagation Delay Time
Clock Pulse Width
Clock Pulse Frequency
Clock Rise and Fall Time
Reset Pulse Width
Reset Removal Time
t
t
t
Clock to Q18
Clock to Q24
Reset to Q
TLH
TLH
TLH
t
t
t
t
t
t
t
t
t
PHL
PHL
PHL
PHL
PHL
PHL
PHL
PHL
PHL
GENERATOR
, t
, t
, t
, t
, t
, t
, t
, t
, t
PULSE
THL
THL
THL
= (1.7 ns/pF) C
= (0.66 ns/pF) C
= (0.5 ns/pF) C
PLH
PLH
PLH
PLH
PLH
PLH
= (1.5 ns/pF) C
= (0.75 ns/pF) C
= (0.55 ns/pF) C
n
500 F
= (1.7 ns/pF) C
= (0.66 ns/pF) C
= (0.5 ns/pF) C
= (1.7 ns/pF) C
= (0.66 ns/pF) C
= (0.5 ns/pF) C
Characteristic
L
L
L
+ 1215 ns
+ 350 ns
+ 467 ns
V
L
V
DD
L
L
SS
+ 25 ns
L
L
L
L
IN 2
R
+ 12.5 ns
+ 12.5 ns
V
L
L
+ 4415 ns
+ 1275 ns
+ 5915 ns
+ 1675 ns
I
DD
D
+ 1667 ns
+ 2167 ns
Figure 1. Power Dissipation Test Circuit and Waveform
Q18
Q19
Q20
Q21
Q22
Q23
Q24
V
(7.)
V
SS
DD
(C
C
L
0.01 F
CERAMIC
L
= 50 pF, T
C
L
C
L
http://onsemi.com
A
C
= 25 _ C)
L
t
t
t
PHL
MC14521B
Symbol
TLH
TLH
t
t
WH(cl)
WH(R)
C
t
t
PHL
rem
f
L
, t
, t
, t
cl
THL
PLH
THL
C
4
L
C
L
V
Vdc
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
10
15
10
15
10
15
10
15
10
15
10
15
10
15
10
15
10
15
DD
1400
– 40
Min
385
150
120
600
450
30
0
V
in
50% DUTY CYCLE
10%
Typ
– 200
– 160
– 110
90%
1300
100
500
375
140
700
300
225
4.5
1.7
1.3
6.0
2.2
1.7
3.5
9.0
50
40
55
40
12
20 ns
(8.)
50%
2600
1000
Max
200
100
750
9.0
3.5
2.7
4.5
3.5
2.0
5.0
6.5
5.0
4.0
80
12
15
V
20 ns
DD
0 V
Unit
MHz
ns
ns
ns
ns
ns
s
s

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