BH1417F Datasheet, PDF (1/3 Pages) Rohm – Wireless Audio Link IC

Multimedia ICs
Wireless Audio Link IC
BH1417F
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.)
Parameter
Symbol
Limits
Unit
Supply voltage
Date input voltage
VCC
+7.0
V
VIN-D −0.3 to VCC+0.3
V
Phase comparator output voltage VOUT-P −0.3 to VCC+0.3
V
Power dissipation
Pd
450^∗
mW
Storage temperature
Tstg
−55 to +125
°C
∗ Derating : 4.5mW/°C for operation above Ta=25°C.
Conditions
Pin8,12
Pin15,16,17,18
Pin7
!Recommended operating conditions (Ta = 25°C)
Parameter
Symbol Min. Typ. Max. Unit
Conditions
Operating supply voltage
VCC
4.0
−
6.0
V Pin8,12
Operating temperature
Topr
−40
−
+85
°C
Audio input level
VIN-A
−
−
−10
dBV Pin1,22
Audio input frequency band
fIN-A
20
−
15k
Hz Pin1,22
Pre-emphasis time constant set up range τ PRE
−
−
Transmission frequency(200kHz step)
fTX
87.7
106.7
−
Control terminal "H" level input voltage
VIH
0.8VCC
−
155
88.9
107.9
VCC
µs
MHz
V
Pin2,21
Pin9,11
Pin15,16,17,18
Control terminal "L" level input voltage
VIL
GND
−
0.2VCC
V Pin15,16,17,18
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