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TEA6842H
Datasheet
TEA6842H
(Product Specification)
19-Dec-03, 66 pages, 379 kB
General description
The TEA6842H is a single IC with car radio tuner for AM, FM and Weather Band (WB) intended for microcontroller tuning with the I2C-bus. It provides the following functions:
- AM double conversion receiver for LW, MW and SW (31 m, 41 m and 49 m bands) with IF1 = 10.7 MHz and IF2 = 450 kHz
- FM single conversion receiver with integrated image rejection for IF = 10.7 MHz capable of selecting US FM, US weather, Europe FM, East Europe FM and Japan FM bands
- The tuning system includes FM mixer, AM mixer 1, AM mixer 2, crystal oscillator, VCO and PLL synthesizer on one chip.
Features
- FM mixer for conversion of FM RF from 65 to 108 MHz to IF of 10.7 MHz; the mixer provides inherent image rejection
- FM RF mixer can be set to receive weather band radio up to 162.55 MHz
- Buffer output for weather band flag
- AM mixer 1 for conversion of AM RF to AM IF1 of 10.7 MHz
- LC tuner oscillator providing mixer frequencies for FM mixer and AM mixer 1
- AM mixer 2 for conversion of AM IF1 to AM IF2 of 450 kHz
- Crystal oscillator providing mixer frequencies for AM mixer 2 and reference for synthesizer PLL, IF count, timing for inaudible Radio Data System (RDS) update and reference frequency for car audio signal processor ICs
- Fast synthesizer PLL tuning system with local control for inaudible RDS updating
- Timing function for RDS update algorithm and control signal output for car audio signal processor ICs (TEA688x, SAA77xx) or car radio integrated signal processor IC (TEF689x)
- Digital auto alignment circuit for conversion of LC oscillator tuning voltage to controlled alignment voltage of FM antenna tank circuit
- AGC PIN diode drive circuit for FM RF AGC; AGC detection at FM mixer input; the AGC PIN diode current can be set to a fixed value to allow local function for search tuning; AGC threshold is a programmable and keyed function switchable via the I2C-bus
- FM IF linear amplifiers with high dynamic input range
- FM quadrature demodulator with automatic centre frequency adjustment and Total Harmonic Distortion (THD) compensation and level driven soft mute; soft mute characteristic is adjustable via the I2C-bus
- Level detector for AM and FM with temperature compensated output voltage; starting point and slope of level output is programmable via the I2C-bus
- AM RF PIN diode drive circuit; AGC threshold detection at AM mixer 1 and IF2 AGC input; threshold is programmable via the I2C-bus; AM IF2 AGC and demodulator
- AM AGC voltage buffer
- AM AF output switchable to provide AM IF2 for AM stereo decoder
- AM noise blanker with blanking at AM IF2
- Ultrasonic noise detector
- Pin for external mute control
- Several test modes available for fast IC and system tests.
Products/packages
All type numbers in the table below are discontinued. See the table Discontinued information for more information.
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| TEA6842H/V1 | TEA6842H/V1,518 | 9352 634 73518 | Discontinued Replacement product | SOT315-1
(LQFP80) | Reel Dry Pack, SMD, 13" | Standard Marking |
Quality/reliability/chemical content
All type numbers in the table below are discontinued. See the table Discontinued information for more information.
| Type number | Orderable part number | Chemical content | RoHS | Leadfree Conversion date | RHF | IRF (FIT) | MTBF (hours) | MSL |
|---|---|---|---|---|---|---|---|---|
| TEA6842H/V1 | TEA6842H/V1,518 | TEA6842H_V1 |
|
Discontinued information
| Type number | Ordering code (12NC) | Last-time buy date | Last-time delivery date | Replacement product | DN Notice | Status | Comments |
|---|---|---|---|---|---|---|---|
| TEA6842H/V1 | 935263473518 | 3-okt-09 | 3-apr-10 | $product.prunedProduct.eplacementPart | DN 63 |
| FAB ICH Closure. Refer to CIN200810022I dated November 5, 2008. |
Design support
Application Notes