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TEA6842H

New In Car Entertainment (NICE) extended car radio

Philips Electronics 

Philips Semiconductors

New In Car Entertainment (NICE)

extended car radio

Product specification

TEA6842H

7.3.4 AM SOFT MUTE

The AM detector output is either not muted or signal

strength dependent soft muted audio. The soft mute

function can be switched off via the I2C-bus.

7.5 Input for external mute

A LOW signal at pin MUTE starts muting with 1 ms slope.

Mute is active as long as the control voltage is LOW.

A HIGH at pin MUTE stops muting with 1 ms slope.

7.3.5 AM NOISE BLANKER

The detection point for the AM noise blanker is the output

stage of AM mixer 1, while blanking is realized at the

output of the mixer 2.

Trigger sensitivity can be modified by changing the resistor

value at pin AMNBHOLD.

7.4 FM and AM level detector

FM and AM level detectors provide the temperature

compensated output voltage. The starting points and

slopes of the level detector outputs are programmable via

the I2C-bus.

7.6 Buffer output for weather band flag

In weather band mode the output is HIGH.

7.7 Test mode

The test mode of the IC is activated by connecting

pin FREF through a 100 kΩ resistor to VDDA1.

The test mode is intended for IC test during IC and radio

manufacturing.

In test mode the settling time of the AM IF2 AGC is

reduced to less than 100 ms in the nominal application.

8 LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 60134).

SYMBOL

VDDA1

VDDA2

VDDA3

VDDA4

VDDA5

VDDA6

VDDD

∆VDD8.5-DD5

Tstg

Tamb

Ves

PARAMETER

analog supply voltage 1 for IF amplifier 1 and 2

analog supply voltage 2 for FM mixer and

AM mixer 1

analog supply voltage 3 for tuning PLL

analog supply voltage 4 for VCO

analog supply voltage 5 for on-chip power supply

analog supply voltage 6 for on-chip power supply

digital supply voltage

difference between any 8.5 V supply voltage and

any 5 V supply voltage

storage temperature

ambient temperature

electrostatic handling voltage

CONDITIONS MIN.

−0.3

−0.3

−0.3

−0.3

−0.3

−0.3

−0.3

note 1

−0.3

note 2

note 3

−55

−40

−200

−2 000

MAX.

+10

+10

UNIT

V

V

+10

V

+10

V

+6.5 V

+10

V

+6.5 V

−

V

+150 °C

+85

°C

+200 V

+2000 V

Notes

1. To avoid damages and wrong operation it is necessary to keep all 8.5 V supply voltages at a higher level than any

5 V supply voltage. This is also necessary during power-on and power-down sequences. Precautions have to be

provided in such a way that interferences can not pull down the 8.5 V supply below the 5 V supply.

2. Machine model (R = 0 Ω, C = 200 pF).

3. Human body model (R = 1.5 kΩ, C = 100 pF).

2003 Dec 19

10

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