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RTL2832U

Do note that everything on this page is from public sources like google or reverse engineering. 

I wanted to design stuff with RTL2832U chip in it. 
But the datasheet is unobtainium without signing NDA's and other stuff like that.
So that leaves us public sources and reverse engineering it. 
Thankfully many things like component values can be cargo cult copied from existing designs. 
Making a sort of usable pinmap and datasheet-y thing will help me in my endeavors and possibly also others. 

Here's some good sources to start reading at:
http://www.realtek.com.tw/products/productsView.aspx?Langid=1&PNid=22&PFid=35&Level=4&Conn=3&ProdID=257
http://www.datasheetcafe.com/rtl2832-datasheet-pdf/
http://superkuh.com/rtlsdr.html
http://datasheetcafe.databank.netdna-cdn.com/wp-content/uploads/2015/09/RTL2832U.pdf
http://knietzsch.de/radio-tv-world/amateur_radio/sdr_index.htm
https://www.reddit.com/r/RTLSDR/comments/1uazsw/rtl2832_datasheet_deep_info/
http://www.rtl-sdr.com/rtl-sdr-direct-sampling-mode/
http://pandatron.cz/elektronika3/rtl-sdr-1_predstaveni_driver-sch_big.gif

E4000 tuner datasheet:
http://www.superkuh.com/gnuradio/Elonics-E4000-Low-Power-CMOS-Multi-Band-Tunner-Datasheet.pdf

Some info gleaned from those sources:

From DL7UKM & RealTek:
Signal 3.3V external power is required  
48-pin QFN (6x6 mm2) Green Package
8pcs GPIO
Tuner AGC output


From Dr.Phil aka DatasheetCafe:

11 28.8MHz xtal osc
12 28.8MHz xtal osc 

13 Tuner AGC

16 SCL for tuner I2C
17 SDA for tuner I2C

18 SCL for EEPROM I2C
19 SDA for EEPROM I2C

38 Infrared port, for the IR receiver output.

40 USB Data pos
41 USB Data neg

Tuner can handle +4dBm input or 1000mV differential peak-to-peak.

From Superkuh:

Pin Use
1 +I
2 -I
3 GND
4 +Q
5 -Q

23 FB feedback for 1.2V internal switching regulator.
24 SW_VOUT1 1.2V internal switching regulator output.
25 SW_VDD3 3.3V input
26 SW_VDD3 3.3V input
27 ENSWREG NC, internal pull-up(?) to 3.3V supply rail. Pulling this low "Applying 0V" disables the 1.2V switching regulator.

Remaining pinfunctions ware gleamed from pictures of rtl-sdr sticks, direct measurements and the schematic from pandatron.cz


 Pin Name Function Pin     Name Function Pin Name Function
 1VIP Diff-I +input 20 VDD1 3.3VDC input 39 SEGND GND
 2VIN Diff-I -input 21 GPIO7GPIO pin 7
 40 HSDP USB Data positive
 3 GNDAAnalog Ground
 22 GPIO6GPIO pin 6
 41 HSDM USB Data negative
 4VQP Diff-Q +input 23 FB 1.2V switcher feedback 42 UVDDA 1.2V input via resistor from 24
 5VQN Diff-Q -input 24 SW_VOUT1 1.2V reg output 43 VDDA33AnalogFE 3.3VDC input
 6 VINR NC 25 SW_VDD3 3.3VDC input 44 VDDAAnalogFE 1.2VDC input via resistor from 24
 7 VDDPLL 1.2VDC input via resistor from 24 26 SW_VDD3 3.3VDC input 45 GNDA GND
 8 GNDPLL   
 PLL GND
 27 ENSWREG 1.2VDC reg enable, pull low to disable 46 VCMI decoupled to gnd via cap
 TP_CKO NC 28 VDD1 1.2VDC input via resistor from 24 47 VDDA 1.2VDC input via resistor from 24
 10 XO 28.8 xtal osc 29 GPIO5 NC 48 R12K 3.3k Resistor to ground 
 11XI 28.8 xtal osc 30 GPIO4 NC   
 12VDD1VDD1 31GPIO2 NC   
 13AGC_IF
 Tuner AGC output, GPIO? 32 GPIO1 NC   
 14 VDD3 Digital 3.3VDC input  33VDD3 3.3VDC input   
 15 AGC_RF GPIO?  34 VDD1 1.2VDC input via resistor from 24   
 16 T_SCL Tuner I2C SCL 35 M_ERR NC   
 17 T_SDA Tuner I2C SDA 36 GPIO3 NC   
 18 EE_SCL EEPROM I2C SCL 37GPIO0    
 19 EE_SDA EEPROM I2C SDA 38 IR_RX_IN IR receiver input "IRRC"
   

Most "NC" based on the schematic reversed by pandatron.cz. 

Here's for hoping that some enterprising individual decaps a rtl2832u. 

Sourcing the RTL2832U:

Mouser, Digi-Key nor Farnell stock it.
RealTek will not sell them to you unless you buy thousands.

But sellers on AliExpress will.

http://www.aliexpress.com/w/wholesale-rtl2832u.html?initiative_id=SB_20160830034717&site=glo&SortType=price_asc&SearchText=rtl2832u&CatId=502&isrefine=y 


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