BH1414K-E2 Rohm Semiconductor, BH1414K-E2 Datasheet
BH1414K-E2
Specifications of BH1414K-E2
BH1414K-E2TR
Available stocks
Related parts for BH1414K-E2
BH1414K-E2 Summary of contents
Page 1
... Wireless Audio Link IC BH1414K The BH1414K stereo transmitter IC that uses a simple configuration. This IC consists of a stereo modulator for generating stereo composite signals and a FM transmitter for broadcasting a FM signal on the air. A high S/N ratio and good timbre transmitter circuit can be composed with a few components available for many applications due to the varieties of setting such as transmission output by serial data input ...
Page 2
... GND3 RF Shift register MPX LIMITER LIMITER EVR EVR + − − + REF REF BH1414K OSC 22 PLL LPF OUT + − Program 21 PLL LPF IN countor REF Phase 20 PLL PHASE DETECTOR OUTPUT detector 19 PILOT SIGNAL OUTPUT MUTE 18 MPX OUTPUT R-ch MPX INPUT 15 19k/38kHz LPF R-ch LPF OUTPUT ...
Page 3
... LIMITER − − − − 62k + 1 − 10k 10k BH1414K DC Description voltage (V) It connects resistor and capacitor. It connects resistor and capacitor cuts DC with the capacitor and it inputs L-ch audio signal cuts DC with the capacitor and it inputs R-ch audio signal. ...
Page 4
... MPX signal output 18 terminal Pilot signal output 19 terminal PLL phase detector 20 output terminal 17 PLL LPF input 21 terminal 21 PLL LPF output 22 terminal 38 Equivalent circuit 17 20k BH1414K DC Description voltage ( connects to the modulator. −0 connects to the modulator. −0.7 It connects to the PLL LPF − circuit. − ...
Page 5
... GND3 (RF) 29 Port output terminal 30 Data input terminal 31 Clock input terminal 32 Chip enable terminal 33 Audio mute terminal Equivalent circuit BH1414K DC Description voltage ( This is the colpitts oscillator. It connects time constant of the oscillation −0 connects resistor and capacitor. −0.9 It connects LC GND − The input terminal of the serial data which is forwarded from the controller ...
Page 6
... Multimedia ICs Pin No. Pin name X'tal oscillator terminal 35 37 Power supply 2 36 terminal (PLL) 37 GND2 (PLL) 38 GND1 Reference voltage 39 terminal Equivalent circuit BH1414K DC Description voltage (V) It connects a 7.6MHz crystal − oscillator GND GND ripple filter for the V CC reference voltage. 2 ...
Page 7
... − 0.3 1.0 V − − 100 nA −100 − − nA − 0.2 1.0 V − − µA 1.0 BH1414K =400Hz) IN Meaasurement Conditions =125mVrms, L→R, R→ =125mVrms, L =125mVrms, L =125mVrms, EVR=0dB, L =125mVrms, EVR=+6dB, L =125mVrms, EVR=−6dB, L Output distortion at 3% for input level =125mVrms, f=10kHz ...
Page 8
... CLOCK DATA 270p PORT 0. GND3 RF Shift register MPX LIMITER LIMITER EVR EVR + − − + REF REF 0.01 620 620 Fig.1 BH1414K 10k 33p 470p OSC 22 + − Program 21 countor REF 620 Phase 20 detector 390p 120k 19 4.7 20k MUTE 18 20k 19k/38kHz LPF 15 0.01 0. ...
Page 9
... Phase detector MUTE MPX LIMITER LIMITER 19k/38kHz LPF EVR EVR + − − + REF REF 620 0.01 620 L-ch R-ch f =400Hz IN V =125mVrms IN Fig.2 BH1414K OSC 22 + − 21 REF Stereo signal demodulator 20 V 390p 120k L-ch 19 4.7 20k 18 10k 0.01 0. R-ch Sep, C.B ...
Page 10
... LIMITER LIMITER 19k/38kHz LPF EVR EVR + − − + REF REF 620 0.01 620 f =400Hz IN V =125mVrms IN Fig.3 BH1414K 0 −10 −20 −30 −40 −50 −60 0 10k 20k 30k 40k 50k 24 23 Frequency (Hz) RF OSC 22 Spectrum + − analyzer 21 REF V OP 1HF BPF 200Hz~15kHz ...
Page 11
... PORT CLOCK DATA 0. GND3 Program countor 1 Phase detector MUTE MPX LIMITER LIMITER 19k/38kHz LPF EVR EVR + − − + REF REF 620 0.01 620 f =400Hz IN Fig.4 BH1414K OSC 22 + − 21 REF IHF BPF 200Hz~15kHz 4.7 10k 0.01 0. IN(LIM) THD=3% ...
Page 12
... CLOCK DATA 0. GND3 Shift register MPX LIMITER LIMITER EVR EVR + − − + REF REF 0.01 620 620 f =400Hz→10kHz→19kHz→38kHz IN V =125mVrms IN Fig.5 BH1414K OSC 22 + − Program 21 countor REF Phase 20 detector V V O(LPF) 19 4.7 10k MUTE 19k/38kHz LPF 15 0.01 0. 0.01 ...
Page 13
... PORT CLOCK DATA 0. GND3 Program Shift register 1 detector MPX LIMITER LIMITER EVR EVR + − − + REF REF 620 620 f =400Hz IN V =125mVrms IN Fig.6 BH1414K OSC 22 + − 21 countor REF IHF BPF Phase 200Hz~15kHz 20 19 4.7 10k MUTE 19k/38kHz LPF 15 0. O(MUTE) ...
Page 14
... CLOCK DATA 270p PORT 0. GND3 Shift register MPX LIMITER LIMITER EVR EVR + − − + REF REF 0.01 620 620 Fig.7 BH1414K 10k 33p 470p OSC 22 + − Program 21 countor REF 620 Phase 20 detector 19 MUTE 19k/38kHz LPF 15 0.01 0. 0.01 ...
Page 15
... 0. GND3 RF Shift register MPX LIMITER LIMITER EVR EVR + − − + REF REF 0.01 620 620 Fig.8 BH1414K OSC 22 + − Program 21 countor REF V OL Phase 20 detector MUTE 19k/38kHz LPF 15 0.01 0. 0.01 +5V 1mA ...
Page 16
... CE CLOCK DATA 5V 0. OFF GND3 RF Shift register MPX LIMITER LIMITER EVR EVR + − − + REF REF 0.01 620 620 Fig.9 BH1414K OSC 22 + − Program 21 countor REF OFF1 OFF2 Phase A 20 detector 0V MUTE 19k/38kHz LPF 15 0.01 0. 0.01 ...
Page 17
... When the serial data input terminal (Pin 30, Pin 31, Pin 32) and the mute control terminal (Pin 33) connect with the µ-com, in off the power of BH1414K and on the power of µ-com, because the current flows backward from the µ-com to BH1414K, insert limitation resistance between the serial data input terminal and the data output terminal of µ-com. But, when the data output by µ ...
Page 18
... L+R+ (L−R) sin ω 0 Stereo operation t+P sin s 1 Monaural operation L+R, Pilot OFF VCO VCO VCO 1 2 Enable Disable 1 PO Open collector output 0 High impedance 1 Low (ON Charge pump output Usual operation Compulsion by Low Compulsion by High 1 1 High impedance BH1414K with LSB MSB ω ...
Page 19
... GND3 V RF Shift register MPX LIMITER LIMITER EVR EVR + − − + REF REF 0.01 (620) (620) L-IN GND R-IN Fig.10 BH1414K 1000p 10k 15p 470p OSC 22 + − Program 21 countor REF 100 Phase 20 detector 330p 120k 19 4.7 20k MUTE 18 20k 19k/38kHz LPF 15 0 ...
Page 20
... Multimedia ICs ! ! ! ! External dimensions (Units : mm) 14.0±0.3 10.0±0 0.15±0.1 0.8 0.35±0.1 0.15 QFP44 BH1414K ...