BU1924F datasheet

http://photos.utsource.net/gif/utsource1.gifproduct details:http://www.utsource.net/BU1924F.htmlIf you want to buy this product please visit:http://www.utsource.net/ic-datasheet/BU1924F-22322.htmlPopular search:BU1924F datasheetBU1924F dataBU1924F pinoutBU1924F equivalentAudio ICsRDS I RBDS decoderBU1924 I BU1924FBU1924 I BU1924FThe BU1924 and BU1924F are RDS I RBDS decoders that employ a digital PLL and have a built-in anti-aliasing filter and an eight-stage BPF (switched-capacitor filter). Linear CMOS circuitry is used for low power consumption.ApplicationsRDS I RBDS compatible FM receivers for American and European markets, car stereos, high-fidelity stereo systems and components, and FM pagers.Features1) Low current.2) Two-stage anti-aliasing filter (LPF).3) 57kHz band-pass filter.4) DSB demodulation (digital PLL).5) Quality indication output for demodulated data. Absolute maximum ratings (Ta = 25°C)Parameter Symbol LimitsConditions Power supply voltage VDD �.3~+7.0 V Maximum input voltage VMax. �.3~VDD+0.3 V Maximum output voltage IMax. ±4.0 mAPower dissipation Pd 350� mW Operating temperature Topr �0~+85 °C Storage temperature Tstg �5~+125 °C∗Reduced by 3.5mW for each increase in Ta of 1°C over 25°C.VDD1 VDD2All input pinsAll output pinsRecommended operating conditions (Ta = 25°C)ParameterSymbol Min. Typ. Max. UnitPower supply voltageVDD1 4.5 �VDD2 4.5 �5.5 VBlock diagramCMP (7) (8)120k�100k�8th Switched capacitor filteranti-aliasing filtercomparator � AnalogPower supply� VDD2RDS/ARI1187.5HzBi-phase decoderDifferential decoder � DigitalPower supplyReference clockMeasurement circuit (13) (14) (10) XI XO 4.332MHZ� : VDD1 and VDD2 are separated within the IC.� : Have VDD2 (digital power supply) of a sufficiently low impedance.� : Match the capacitor constants with the crystal manufacturer. 16 15 1411 10 91 2 3 4 5 6 7 8Pin descriptionsPin No.Pin nameFunctions Input/Output type 1 QUAL Demodulator quality2 RDATA Demodulator data3 Vref Reference voltage4 MUX InputGood data : High, bad data : LowRefer to output data timing1/2 VDD1 (refer to input/output circuits)Composite signal input (refer to input/output circuits)Type CType E Type DAnalog power supply 4.5V to 5.5V � 7 VSS3 GND �� 8 CMP Comparator inputC-junction (refer to input/output circuits )11 VDD2Test inputOpen or connected to ground12 VSS2Digital power supply 4.5V to 5.5V �Crystal oscillatorConnects to 4.332MHz oscillator(refer to input/output circuits)Type A 15 (N.C.) ��16 RCLK Demodulator clock 1187.5Hz clock (refer to the timing diagram)Input I Output circuits Type A Type BType CType EElectrical characteristics (unless otherwise noted, Ta = 25°C, VDD1 = VDD2 = 5.OV, VSS1 = VSS2 = O.OV)Parameter Symbol Min. Typ. Max. Unit ConditionsOperating current IDD �4.5 7.0 mA IDD1+IDD2Reference voltage Vref �1/2VDD1 �V Pin 3 Input current 1 IIN1 ��1.0 µA MUXVIN=VDD1 Output current 1 IOUT1 ��1.0 µAVIN=VDD1 Input current 2 IIN2 ��1.0 µA XIVIN=VDD2 Output current 2 IOUT2 ��1.0 µA XIVIN=VDD2 Output high level voltage 1 VOH1 V�V RCLK RDATA QUAL I =�.0mA �.0 �.3 OOutput low level voltage 1 VOL1 �0.2 1.0 V RCLK RDATA QUAL IO=1.0mA〈Filter block�Center frequency FC 56.5 57.0 57.5 kHzGain GA 20 23 26 dB F=57.0kHzAttenuation 1 ATT1 18 22Attenuation 2 ATT2 65 80Attenuation 3 ATT3 35 50S / N ratio SN 30 40�dB 57kHz±4kHz�dB 38kHz�dB 67kHz�dB 57kHz VIN=3mVrms Maximum input level VMAX1 ��〈Demodulator�500 mVrms RDS detector sensitivity SRDS �0.5 1.0 mVrms RDS input level MRDS 1.0 �300 mVrms ARI detector sensitivity SARI � 1.5 3.0 mVrms Data rate DRATE �1187.5 � Hz Clock transient vs. data CT � 4.3 � µsNot designed for radiation resistance.Output data timingT1=T2=4.3µST1 T3 T4 T2 T6 T2T3=T4=421µS T5=T6=416.7µSThe clock (RCLK) frequency is 1187.5Hz. Depending on the state of the internal PLL clock, the data (RDATA) is replaced in synchronous with either the rising or falling or falling edge of the clock. To read the data, you may choose either therising or falling edge of the clock as the reference. The data is valid for 416.7µs. after the reference clock edge.QUAL pin operation : Indicates the quality of the demodulated data. (1) Good data : HI(2) Poor data : LOElectrical characteristic curves10 20 30 40 50 60 70 80 90 100FREQUENCY : f (kHz)Fig.1 Band-pass filter characteristicsExternal dimensions (Units : mm)BU1924 BU1924F 19.4±0.310.0±0.2 2.54 0.5±0.10°~15°0.4±0.10.3Min.DIP16 SOP16