BH1417F
Multimedia ICs
1/2
Wireless Audio Link IC
BH1417F


The BH1417F 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.
Frequency is set for North America.


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


!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 controls data input in parallel (4bits, 14ch for North America).


!Absolute maximum ratings (Ta = 25°C, In measurement circuit.)
Supply voltage
Power dissipation
Storage temperature
Date 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
τ PRE
fTX
VIH
VIL
20
−
87.7
106.7
0.8VCC
GND
Max.
6.0
+85
−10
15k
155
88.9
107.9
VCC
0.2VCC
Typ.
−
−
−
−
−
−
−
−
dBV
Hz
µs
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(200kHz step)
Control terminal "H" level input voltage
Control terminal "L" level input voltage