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E-TDA7479DTR

P1-P3P4-P6P7-P9P10-P12
TDA7479 Output timing
7/12
3 Output timing
The RDS (1187.5Hz) output clock on RDCL line is synchronized to the incoming data. According
to the internal PLL lock condition data change can result on the falling or on the rising clock edge
(see Figure 3). Whichever clock edge is used by the decoder (rising or falling edge) the data will
remain valid for 416.7
µ
s after the clock transition.
Figure 3. RDS timing diagram
RDCL
RDDA
CLOCK
LINE
DATA
LINE
4.3µs
td
4.3µs837.7µs 421µs 421µs
Oscillator controls (FSEL, OSEL) TDA7479
8/12
4 Oscillator controls (FSEL, OSEL)
Three different crystal frequencies can be used. The adoption of the internal clock divider to
the external crystal is achieved via the input pin FSEL. See the following table for reference:
A special mode is introduced to reduce EMI. With pin OSEL connected to GND the internal
oscillator is switched off and an external sinusoidal frequency could be applied on OSCIN.
The peak to peak voltage of this signal can be reduced down to 60mV.
In this mode the frequency selection via FSEL is still active.
Suggested values of C1 and C2 are shown in the following table:
Table 6. Crystal frequencies
Crystal FSEL (pin configuration)
4.332MHz
8.664MHz
17.328MHz
connected to GND or open connected to Vs external resistor of 100K to Vs
Table 7. C1 and C2 value
Crystal C1 C2
4.332MHz
8.664MHz
17.328MHz
27pF
27pF
27pF
47pF
-
-
TDA7479 Package information
9/12
5 Package information
In order to meet environmental requirements, ST (also) offers these devices in ECOPACK
®
packages. ECOPACK
®
packages are lead-free. The category of second Level Interconnect
is marked on the package and on the inner box label, in compliance with JEDEC Standard
JESD97. The maximum ratings related to soldering conditions are also marked on the inner
box label.
ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
Figure 4. SO16 mechanical data and package dimensions
OUTLINE AND
MECHANICAL DATA
DIM.
mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 2.35 2.65 0.093 0.104
A1 0.10 0.30 0.004 0.012
B 0.33 0.51 0.013 0.200
C 0.23 0.32 0.009 0.013
D
(1)
10.10 10.50 0.398 0.413
E 7.40 7.60 0.291 0.299
e 1.27 0.050
H 10.0 10.65 0.394 0.419
h 0.25 0.75 0.010 0.030
L 0.40 1.27 0.016 0.050
k 0˚ (min.), 8˚ (max.)
ddd 0.10 0.004
(1) “D” dimension does not include mold flash, protusions or gate
burrs. Mold flash, protusions or gate burrs shall not exceed
0.15mm per side.
SO16 (Wide)
0016021 C
P1-P3P4-P6P7-P9P10-P12

E-TDA7479DTR

Mfr. #:
Buy E-TDA7479DTR
Manufacturer:
STMicroelectronics
Description:
RF Wireless Misc SINGLE CHIP RDS DEMODULATOR + FILTER
Lifecycle:
New from this manufacturer.
Delivery:
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