參數(shù)資料
型號(hào)： TEF6894H/V2,518
廠商： NXP SEMICONDUCTORS
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP44
封裝： 10 X 10 MM, 1.75 MM HEIGHT, PLASTIC, SOT-307-2, QFP-44
文件頁(yè)數(shù)： 23/55頁(yè)
文件大?。?/td> 313K
代理商： TEF6894H/V2,518
2003 Oct 21
3
Philips Semiconductors
Product specication
Car radio integrated signal processor
TEF6894H
1
FEATURES
1.1
General
High integration
No external components except coupling capacitors for
signal inputs and outputs
QFP44 package with small Printed-Circuit Board (PCB)
footprint.
1.2
I2C-bus
Fast mode 400 kHz I2C-bus, interfaces to logic levels
ranging from 2.5 to 5 V
Gated I2C-bus loop through to tuner IC
– Eases PCB layout (crosstalk)
– Allows mix of 400 kHz and 100 kHz busses
– Low bus load reduces crosstalk
– Buffered I/O circuit
– Supply voltage shift between both buses allowed.
Shortgate function offers easy control with automatic
gating of a single transmission; suited for TEA684x
Autogate function offers transparent microcontroller
control with automatic on/off gating (programmable
address).
1.3
Stereo decoder
FM stereo decoder with high immunity to birdy noise and
excellent pilot cancellation
Integrated IF roll-off correction controlled via I2C-bus
De-emphasis selectable between 75 and 50 s via
I2C-bus.
1.4
Noise blanking
New fully integrated AM noise blanker with excellent
performance
Fully integrated FM noise blanker with superior
performance.
1.5
Weak signal processing
FM weak signal processing with detectors for RF level,
Ultrasonic Noise (USN) and Wideband AM (WAM)
information
AM weak signal processing with detectors for level
information
AM processing with soft mute and High Cut Control
(HCC)
FM processing with soft mute, stereo blend and HCC
Setting of the sensitivity of the detectors and start and
slope of the control functions via I2C-bus
Weather band de-emphasis
Level, USN and WAM read-out via I2C-bus (signal
quality detectors)
Full support of tuner AF update functions with TEA684x
tuner ICs, FM audio processing holds the detectors for
the FM weak signal processing in their present state
during RDS updating.
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