October 1992

13

Philips Semiconductors

Product specification

TSA5514

FLOCK FLAG DEFINITION (FL)

When the FL flag is 1, the maximum frequency deviation (

∆f) from stable frequency can be expressed as follows:

Where:

FLOCK FLAG APPLICATION

• C1 = 180 nF

• C2 = 39 nF

•∆f = ± 27.5 kHz.

Table 5

Flock flag settings

=

oscillator slope (Hz/V)

=

charge-pump current (A)

=4

× 10E6

C1 and C2

=

loop filter capacitors (see Fig.8)

MIN.

MAX.

UNIT

Time span between actual phase lock and FL-flag setting

1024

1152

µs

Time span between the loop losing lock and FL-flag resetting

0

128

µs

∆fK

⁄

()

±

I

CP

C1

C2

+

()

C1

C2

×

()

⁄

×

×

=

Fig.8 Loop filter.