TDA9873HS datasheet(16/40 Pages) PHILIPS

16 / 40 page

2000 Apr 04

Philips Semiconductors

Product speciﬁcation

Multistandard dual carrier stereo sound decoder

TDA9873H

12. The maximum total system identification time ‘on’ for a channel change is equal to the maximum value of tident(on)

plus tI2C(read-out). The maximum total system identification time ‘off’ for a channel change is equal to the maximum

value of tident(off) plus tI2C(read-out). The fast mode is mainly for use during search tuning, program or channel select.

If the channel is selected, the identification response should be switched to normal mode for improved reliability.

However due to the transition from fast to normal mode, the identification bits are not valid for one integrator period.

Therefore the transmitter mode detected during the fast mode must be stored before changing to the normal mode.

The storage must be kept for two seconds (maximum value of tident(on) in the normal mode) from the moment of

transition. The identification can now operate in the normal mode until the next tuning action.

13. Identification window is defined as total pull-in frequency range (lower plus upper side) of identification PLL (steady

detection) plus window increase due to integrator (fluctuating detection).

14. Window width dependent on fω.

15. The AC characteristics are in accordance with the I2C-bus specification. The maximum clock frequency is 100 kHz.

Information about the I2C-bus can be found in the brochure

“The I2C-bus and how to use it”

(order number 9398 393 40011).

Table 1

TV standard settings

STANDARD

fSC1

(MHz)

fSC2

(MHz)

PILOT

FREQUENCY

fpilot (kHz)

STEREO

IDENTIFICATION

FREQUENCY

fstereo (Hz)

DUAL

IDENTIFICATION

FREQUENCY

fdual (Hz)

DE-EMPHASIS

tDEP (µs)

4.5

4.724

55.0699

149.85

276.04

B/G

5.5

5.742

54.6875

117.48

274.12

−

−−−

D/K (1)

6.5

6.268

54.6875

117.48

274.12

D/K (2)

6.5

6.742

54.6875

117.48

274.12

D/K (3)

6.5

5.742

54.6875

117.48

274.12

Fig.3 Allowable interference video level.

video: colour-bar

SC1

SC2

-----------

7 dB

handbook, full pagewidth

0.5

0.16

6 12

150

SC1

MHB433

Vi(FM)(rms) (mV)

Vi(vid)(p-p)

(V)

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