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BH1414K-E2

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
BH1414K
Multimedia ICs
Wireless Audio Link IC
BH1414K
The BH1414K is a FM 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. It is available for many applications due to the
varieties of setting such as transmission output by serial data input.
!
!!
!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 19kHz/38kHz low-
pass trap filter circuit.
2) Built-in pilot-tone system FM stereo modulator circuit.
3) The transmission frequency is stable because it has a PLL system for the FM transmitter circuit.
4) PLL data input (CE, CK, DA) by serial input.
5) It is possible for input level setting, monaural operation and output ON/OFF control by serial input.
6) It is possible for the transmission output control.
!
!!
!Absolute maximum ratings (Ta = 25°C)
Parameter Symbol Limits Unit
Supply voltage
Power dissipation
Storage temperature range
V
CC1
VCC2
Pd
Tstg
+9.0
+10.0
500
−55~+125
V
mW
°C
∗ Reduced by 5mW for each increase in Ta of 1°C over 25°C.
!
!!
!Recommended operating conditions (Ta = 25°C)
Parameter Symbol Min. Typ. Max. Unit
Operating supply voltage
Operating temperature range
Audio input level
Audio input frequency
Transmission frequency
V
CC
Topr
V
IN-A
f
IN-A
f
TX
4.5
−40
−
20
75
−
−
−
−
−
5.5
+85
500
15k
110
V
°C
mVrms
Hz
MHz
BH1414K
Multimedia ICs
!
!!
!Block diagram
34
35
36
37
38
39
40
41
42
43
44
22
21
20
19
18
17
16
15
14
13
12
GIC4L
GIC3L
GIC2L
GIC1L
L-ch INPUT
LIMITER LEVEL ADJUST
R-ch INPUT
GIC1R
GIC2R
GIC3R
GIC4R
X'tal OSCILLATOR
X'tal OSCILLATOR
V
CC
2 (PLL)
GND2 (PLL)
GND1
REFERENCE
L-ch MPX INPUT
L-ch LPF OUTPUT
GIC7L
GIC6L
GIC5L
PLL LPF OUT
PLL LPF IN
PLL PHASE DETECTOR OUTPUT
PILOT SIGNAL OUTPUT
MPX OUTPUT
V
CC
1
R-ch MPX INPUT
R-ch LPF OUTPUT
GIC7R
GIC6R
GIC5R
AUDIO MUTING
CHIP ENABLE
CLOCK
DATA
PORT
RF OUTPUT
GND3 (RF)
RF ADJUST
V
CC
3 (RF)
RF OSCILLATOR
RF OSCILLATOR
123 4 5 6 7 8 9 10 11
33 32 31 30 29 28 27 26 25
24
23
Shift register
4
1
2
1
19
1
50
1
2
V
CC
RF
RF OSC
Program
countor
Phase
detector
MUTE
MPX
LIMITER LIMITER19k/38kHz LPF 19k/38kHz LPF
GND3 V
CC
3
+−
REF
+−
EVR EVR
+−
REF
REF
REF
V
CC
2
GND2
GND1
V
CC
1
BH1414K
Multimedia ICs
!
!!
!Pin descriptions
Pin name Description
Equivalent circuit
DC
voltage
(V)
L-ch LPF
time constant terminal
It connects resistor and
capacitor.
It connects resistor and
capacitor.
R-ch LPF output and
LPF time constant
terminal
R-ch LPF
time constant terminal
1
2
3
4
42
43
44
15
L-ch LPF output and
LPF time constant
terminal
41
L-ch
audio source input
terminal
R-ch
audio source input
terminal
5
7
Limiter level adjust
terminal
6
8
9
10
11
12
13
14
Pin No.
LIMITER
41 15
or
4 8
or
3 9
or
2 10
or
44 12
or
42 14
or
1 11
or
43 13
or
1.3k 1.3k
125
1.2k1k1k
330
1.2k1k1k
+
+
+
+
−
−
−
−
2
V
CC
1
2
V
CC
1
2
V
CC
1
17
5 7
38
62k
or
It cuts DC with the capacitor
and it inputs L-ch audio
signal.
It cuts DC with the capacitor
and it inputs R-ch audio
signal.
It adjusts a limiter level by
the resistance.
17
6
38
10k
10k
2
V
CC
1
+
−
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

BH1414K-E2

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Buy BH1414K-E2
Manufacturer:
Description:
RF Receiver COMMUNICATION LINK
Lifecycle:
New from this manufacturer.
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