BH1417F
Multimedia ICs
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 = 25C, In measurement circuit.)
Parameter Symbol Limits Unit Conditions
Pin8,12
Supply voltage VCC +7.0 V Pin15,16,17,18
Date input voltage Pin7
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=25C.
!Recommended operating conditions (Ta = 25C)
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 PRE - - 155 s Pin2,21
88.9 MHz Pin9,11
Transmission frequency(200kHz step) fTX 87.7 - 107.9 Pin15,16,17,18
106.7 VCC V
Control terminal "H" level input voltage VIH 0.8VCC -
Control terminal "L" level input voltage VIL GND - 0.2VCC V Pin15,16,17,18
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Multimedia ICs BH1417F
!Application circuit 10+
US BAND (88.0MHz89.2MHz) 0.1
50k 1
2200p+
150p
7.6MHz 27p
27p
22 21 20 19 18 17 16 15 14 13 12
L-CH
PLL VCC
+
1
GND
GND
1 VCC RF GND
+
50k
1 2 3 4 5 6 7 8 9 10 11
R-CH GFWB3
33p 33
+ 1 0.01 1000p 1000p 360 (SOSHIN)
1 +
1 82 ANT
+ 82
2200p
150p GND
10 FEM10C-2F6 (SUMIDA)
20k
33p
MPX
330p 82p KV-1471E
2.2k (TOKO)
10k
10k 10 10k
+
3.3k
0.047 3.3k
VT
100 100 2200p
+
2SD2142K
(ROHM)
GND +
100
VCC
!External dimensions (Units : mm)
13.60.2
22 12
1.80.1 7.80.3 5.40.2 0.3Min.
1 11 0.150.1
0.11 1.27 0.40.1 0.1
SOP22
2/2
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document use silicon as a basic material.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.0
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