74hc7046a NXP Semiconductors, 74hc7046a Datasheet - Page 35

• Manufacturer Part Number: 74hc7046a
• Description: Phase-locked-loop With Lock Detector
• Manufacturer: NXP Semiconductors

Philips Semiconductors
The maximum permitted phase error
must be defined, before t
defined using the following formula:
Using this calculated value in Fig.32,
it is possible to define the value of
C
36 and f
and using Fig.32, it can be seen that
C
With the addition of one retriggerable
monostable (e.g. “123”, “423” or
“4538”) a steady state LOW and
HIGH indication can be obtained, as
shown in Fig.33.
December 1990
t
LD
t
LD
LD
LD
Phase-locked-loop with lock detector
, e.g. assuming the phase error is
is 26 pF.
=
=
--------- -
360
36
----------- -
360
IN
max
= 2 MHz:
-----------------
2 MHz
----- -.
f
1
IN
1
=
50 ns,
LD
can be
Fig.33 Steady state signal for lock indication.
35
74HC/HCT7046A
Product specification