BH1415F
Audio ICs
1/3
Wireless Audio Link IC
BH1415F


The BH1415F is a FM stereo transmitter IC that transmits simple configuration. The IC consists of a stereo modulator for
generating stereo composite signals and a FM transmitter for broadcasting a FM signal on the air. The stereo modulator
generates a composite signal which consists of the MAIN, SUB, and pilot signal from a 38kHz oscillator.
The FM transmitter radiates FM wave on the air by modulating the carrier signal with a composite signal.


!Applications
CD changer, Car TV, Car navigation, Wireless speakers, Personal computer (sound board), Game machine


!Features
1) It is possible to improve the timbre because it has the pre-emphasis circuit, limiter circuit, and the low-pass filter circuit.
2) Built-in pilot-tone system FM stereo modulator circuit.
3) The transmission frequency is stable because it has a PLL system FM transmitter circuit.
4) PLL data input (CE, CK, DA) by serial input.


!Absolute maximum ratings (Ta = 25°C, In measurement circuit.)
Supply voltage
Power dissipation
Storage temperature
Data input voltage
Phase comparator output voltage
∗ Derating : 4.5mW/°C for operation above Ta=25°C.
Parameter Symbol Limits Unit
VCC
Pd
Tstg
V
V
V
mW
°C
+7.0
−0.3 to VCC+0.3
−0.3 to VCC+0.3
−55 to +125
Conditions
VIN-D
VOUT-P
450
Pin8,12
Pin15,16,17,18
Pin7
∗



!Recommended operating conditions (Ta = 25°C)
Audio input level
Parameter Symbol Min. Unit
VCC V
V
V
°C
4.0
−40
−
Conditions
VIN-A
fIN-A
Topr
t PRE
fTX
VIH
VIL
20
−
70
0.8VCC
GND
Max.
6.0
+85
−10
15k
155
120
VCC
0.2VCC
Typ.
−
−
−
−
−
−
−
−
dBV
Hz
µsec
MHz
Pin8,12
Pin1,22
Pin1,22
Pin2,21
Pin9,11
Pin15,16,17,18
Pin15,16,17,18
Operating supply voltage
Operating temperature
Audio input frequency band
Pre-emphasis time constant set up range
Transmission frequency
Control terminal "H" level input voltage
Control terminal "L" level input voltage