Table of Contents
Advertisement
Philips Semiconductors
14. Printed-circuit board layout for SSOP24 package
9397 750 13022
Preliminary data sheet
The printed-circuit board traces from LL1 to V
Figure
10, are to create two inductors, each of approximately 38 nH. These inductors,
together with internal capacitors, form part of the LC oscillator to determine the FM tuning
band. If the value of the inductors becomes much greater than 38 nH, the whole FM
tuning band (normally from 76 MHz to 108 MHz) will be shifted lower. If the value of the
inductors becomes much smaller than 38 nH, the whole FM tuning band (normally from
76 MHz to 108 MHz) will be shifted higher.
If the layout of the two inductance traces is not preferred, two SMD inductors can be used
to replace the two printed-circuit board inductance traces as an alternative. The layout of
the two SMD inductors should be as close to the pins as possible.
RFGND
CLOCK
(1) Width of printed-circuit board trace = 0.15 mm; spacing between printed-circuit board
trace = 0.15 mm.
(2) Pins 14, 15, 16, 21, 22 and 23 are not connected.
Fig 10. Printed-circuit board layout.
Integrated FM stereo radio IC for host processor tuning
RFIN
GND
V
CCD
V
CCA
R/W
DATA
MPX
AUDL
AUDR
LED
3.5 mm
Rev. 02 — 26 April 2004
TEA5880TS
and from V
to LR1 as shown in
CC1
CC1
GND
n.c.
n.c.
reserved
LL1
V
CC1
V
CC1
LR1
n.c.
3.5 mm
n.c.
n.c.
GND
001aaa675
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
19 of 27
Advertisement
Table of Contents
