ROHM BD37524FS

Sound Processor Series for Car Audio
Sound Processor with Built-in
3-band Equalizer
No.10085EAT05
BD37524FS
●Description
BD37524FS is sound processors built-in 3-band equalizer for car audio. The functions are stereo 5ch input selector,
input-gain control, main volume, loudness, 5ch fader volume, LPF for subwoofer, level meter. Moreover, “Advanced switch
circuit”, that is ROHM original technology, can reduce various switching noise (ex. No-signal, low frequency likes 20Hz &
large signal inputs). “Advanced switch” makes control of microcomputer easier, and can construct high quality car audio
system.
●Features
1) Reduce switching noise of input gain control, mute, main volume, fader volume, bass, treble, loudness by using
advanced switch circuit [Possible to control all steps]
2) Built-in 1 differential input selector and 4 single-ended input selectors
3) Built-in ground isolation amplifier inputs, ideal for external stereo input.
4) Built-in input gain controller reduces switching noise for volume of a portable audio input.
5) Decrease the number of external components by built-in 3-band equalizer filter, LPF for subwoofer, loudness filter.
2
And, possible to control Q, Gv, fo of 3-band equalizer and fc of LPF, fo, Gv of loudness by I C BUS control freely
6) It is possible for the bass, middle, and treble to the gain adjustment quantity of ±20dB and 1 dB step gain adjustment.
7) Terminals for the subwoofer outputs are equipped.
8) Bi-CMOS process is suitable for the design of low current and low energy. And it provides more quality for small scale
regulator and heat in a set.
9) Package is SSOP-A24. Putting input-terminals together and output-terminals together can make PCB layout easier
and can makes area of PCB smaller.
2
10) It is possible to control by 3.3V / 5V for I C BUS.
●Applications
It is the optimal for the car audio. Besides, it is possible to use for the audio equipment of mini Compo, micro Compo, TV
etc with all kinds.
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© 2010 ROHM Co., Ltd. All rights reserved.
1/25
2010.03 - Rev.A
Technical Note
BD37524FS
●Line up matrix
Function
Input selector
Input gain
Mute
Volume
Bass
Middle
Treble
Fader
Loudness
LPF
Level meter
Specifications
・Stereo 4 input
・Differential 1 input
・0～20dB（1dB step）
・Possible to use “Advanced switch” for prevention of switching noise.
・Possible to use “Advanced switch” for prevention of switching noise.
・+15dB～-79dB（1dB step）, -∞
・Possible to use “Advanced switch” for prevention of switching noise.
・-20～+20dB（1dB step）
・Q=0.5, 1, 1.5, 2 variable
・fo=60, 80, 100, 120Hz
・Possible to use “Advanced switch” at changing gain
・-20～+20dB（1dB step）
・Q=0.75, 1, 1.25, 1.5 variable
・fo=500, 1k, 1.5k, 2.5kHz variable
・Possible to use “Advanced switch” at changing gain
・-20～+20dB（1dB step）
・Q=0.75, 1.25 variable
・fo=7.5k, 10k, 12.5k, 15kHz variable
・Possible to use “Advanced switch” at changing gain
・+15dB～-79dB(1dB step), -∞dB
・Possible to use “Advanced switch” for prevention of switching noise.
・0dB～20dB(1dB step)
・fo=250/400/800Hz
・Possible to use “Advanced switch” for prevention of switching noise.
・fc=55/85/120/160Hz, pass
・Phase shift (0°/180°)
・I2C BUS control
・DC Output
●Absolute maximum ratings (Ta=25℃)
Item
Symbol
Rating
Unit
Power supply Voltage
VCC
10.0
V
Input voltage
Vin
VCC+0.3～GND-0.3
V
Power Dissipation
Pd
1000 ※1
mW
Storage Temperature
Tastg
-55～+150
℃
※This value decreases 8mW/℃ for Ta=25℃ or more.
ROHM standard board shall be mounted.
Thermal resistance θja = 125(℃/W)
ROHM Standard board
Size：70×70×1.6(㎣)
Material：A FR4 grass epoxy board(3% or less of copper foil area)
●Operating conditions
Item
Symbol
MIN
TYP
MAX
Unit
Power supply Voltage
VCC
7.0
－
9.5
V
Temperature
Topr
-40
－
+85
℃
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2/25
2010.03 - Rev.A
Technical Note
BD37524FS
GENERAL
BLOCK
●Electrical characteristics
(Unless specified particularly, Ta=25℃, VCC=8.5V, f=1kHz, Vin=1Vrms, Rg=600Ω, RL=10kΩ, A1 input, Input gain 0dB,
Mute off, Volume 0dB, Tone control 0dB, Loudness 0dB, LPF OFF, Fader 0dB)
Limit
Item
Symbol
Unit
Condition
Min.
Typ.
Max.
IQ
GV
CB
－
-1.5
-1.5
38
0
0
48
1.5
1.5
mA
dB
dB
THD+N1
－
0.001
0.05
％
THD+N2
－
0.002
0.05
％
VNO1
－
3.8
15
μVrms
VNO2
－
4.8
15
μVrms
Residual output noise voltage＊
VNOR
－
1.8
10
μVrms
Cross-talk between channels＊
CTC
－
-100
-90
dB
RR
－
-70
-40
dB
RIN_S
RIN_D
70
175
100
250
130
325
kΩ
kΩ
Maximum input voltage
VIM
2.1
2.3
－
Vrms
Cross-talk between selectors＊
CTS
－
-100
-90
dB
Common mode rejection ratio＊
CMRR
50
65
－
dB
Minimum input gain
GIN MIN
-2
0
+2
dB
Maximum input gain
GIN MAX
18
20
22
dB
Gain set error
GIN ERR
-2
0
+2
dB
Mute attenuation＊
GMUTE
－
-105
-85
dB
Maximum gain
GV MAX
13
15
17
dB
Maximum attenuation＊
GV MIN
－
-100
-85
dB
Attenuation set error 1
Attenuation set error 2
Attenuation set error 3
GV ERR1
GV ERR2
GV ERR3
-2
-3
-4
0
0
0
2
3
4
dB
dB
dB
Current upon no signal
Voltage gain
Channel balance
Total harmonic distortion 1
(FRONT,REAR)
Total harmonic distortion 2
(SUBWOOFER)
Output noise voltage 1
(FRONT,REAR)＊
Output noise voltage 2
(SUBWOOFER)＊
Ripple rejection
VOLUME
MUTE
INPUT GAIN
INPUT SELECTOR
Input impedance(A, B)
Input impedance (C,D,E)
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3/25
No signal
Gv=20log(VOUT/VIN)
CB = GV1-GV2
VOUT=1Vrms
BW=400-30KHz
VOUT=1Vrms
BW=400-30KHz
Rg = 0Ω
BW = IHF-A
Rg = 0Ω
BW = IHF-A
Fader = -∞dB
Rg = 0Ω
BW = IHF-A
Rg = 0Ω
CTC=20log(VOUT/VIN)
BW = IHF-A
f=1kHz
VRR=100mVrms
RR=20log(VCC IN/VOUT)
VIM at THD+N(VOUT)=1％
BW=400-30KHz
Rg = 0Ω
CTS=20log(VOUT/VIN)
BW = IHF-A
CP1 and CN input
CP2 and CN input
CMRR=20log(VIN/VOUT)
BW = IHF-A
Input gain 0dB
VIN=100mVrms
Gin=20log(VOUT/VIN)
Input gain 20dB
VIN=100mVrms
Gin=20log(VOUT/VIN)
GAIN=+20～+1dB
Mute ON
Gmute=20log(VOUT/VIN)
BW = IHF-A
Volume = 15dB
VIN=100mVrms
Gv=20log(VOUT/VIN)
Volume = -∞dB
Gv=20log(VOUT/VIN)
BW = IHF-A
GAIN & ATT=+15dB～-15dB
ATT=-16dB～-47dB
ATT=-48dB～-79dB
2010.03 - Rev.A
Technical Note
Level
meter
LOUDNESS
FADER / SUBWOOFER
TREBLE
MIDDLE
BASS
BLOCK
BD37524FS
Item
Symbol
Limit
Min.
Typ.
Max.
Unit
Maximum boost gain
GB BST
18
20
22
dB
Maximum cut gain
GB CUT
-22
-20
-18
dB
Gain set error
GB ERR
-2
0
2
dB
Maximum boost gain
GM BST
18
20
22
dB
Maximum cut gain
GM CUT
-22
-20
-18
dB
Gain set error
GM ERR
-2
0
2
dB
Maximum boost gain
GT BST
17
20
23
dB
Maximum cut gain
GT CUT
-23
-20
-17
dB
Gain set error
GT ERR
-2
0
2
dB
Maximum boost gain
GF BST
13
15
17
dB
Maximum attenuation＊
GF MIN
－
-100
-90
dB
Gain set error
Attenuation set error 1
Attenuation set error 2
Attenuation set error 3
Output impedance
GF ERR
GF ERR1
GF ERR2
GF ERR3
ROUT
-2
-2
-3
-4
-
0
0
0
0
－
2
2
3
4
50
dB
dB
dB
dB
Ω
Maximum output voltage
VOM
2
2.2
－
Vrms
Maximum gain
GL MAX
17
20
23
dB
Gain set error
GL ERR
-2
0
2
dB
Maximum output voltage
VL MAX
2.8
3.1
3.5
V
VL OFF
－
0
100
mV
Output offset voltage
Condition
Gain=+20dB f=100Hz
VIN=100mVrms
GB=20log (VOUT/VIN)
Gain=-20dB f=100Hz
VIN=2Vrms
GB=20log (VOUT/VIN)
Gain=-20～+20dB f=100Hz
Gain=+20dB f=1kHz
VIN=100mVrms
GM=20log (VOUT/VIN)
Gain=-20dB f=1kHz
VIN=2Vrms
GM=20log (VOUT/VIN)
Gain=-20～+20dB f=1kHz
Gain=+20dB f=10kHz
VIN=100mVrms
GT=20log (VOUT/VIN)
Gain=-20dB f=10kHz
VIN=2Vrms
GT=20log (VOUT/VIN)
Gain=-20～+20dB f=10kHz
Fader=15dB
VIN=100mVrms
GF=20log(VOUT/VIN)
Fader = -∞dB
GF=20log(VOUT/VIN)
BW = IHF-A
Gain=+1～+15dB
ATT=-1～-15dB
ATT=-16～-47dB
ATT=-48～-79dB
VIN=100mVrms
THD+N=1％
BW=400-30KHz
Gain 20dB
VIN=100mVrms
GL=20log(VOUT/VIN)
GAIN=+20～+1dB
VP-9690A(Average value detection, effective value display) filter by Matsushita Communication is used for ＊ measurement.
Phase between input / output is same.
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4/25
2010.03 - Rev.A
Technical Note
BD37524FS
●Electrical characteristic curves (Reference data)
THD+N(%
1
30
THD+N[%]
Iq[mA]
40
20
10
10kHz
10
5
1
4
3
1kHz
100Hz
0.1
0.1
0.01
0.01
2
Gain[dB]
Gain(dB
10
Vin[Vrms]
Vou
50
Gain=0dB
1
0
-110
-2
100
1k
10k
100k
-3
0
2
4
6
8
0.001
0.001
10
VCC[V]
Gain[dB]
100
1k
10k
Frequency [Hz]
100k
25
20
15
10
5
0
-5
-10
-15
-20
-25
10
100
1k
10k
Frequency [Hz]
25
20
MIDDLE GAIN :
-20～+20dB /1dB step
fo : 500Hz
Q : 0.75
100
1k
10k
Frequency [Hz]
25
20
15
10
5
fo : 60/80/100/120Hz
BASS GAIN : ±20dB
Q : 0.5
100k
15
10
5
0
-5
-10
-15
100
1k
10k
100
1k
10k
Frequency [Hz]
25
20
15
10
5
0
-5
-10
-15
-20
-25
Q : 0.75/1/1.25/1.5
MIDDLE GAIN :
±20dB
fo : 1kHz
10
100k
100
Fig.8 Middle fo vs Freq
15
100
1k
10k
100k
Frequency [Hz]
Frequency (Hz)
Fig.10 Treble Gain vs Freq
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Q : 0.75/1.25
TREBLE GAIN : ±20dB
fo : 7.5kHz
20
15
Gain[dB]
Gain (dB)
10
5
0
-5
-10
-15
10
100k
25
fo : 7.5k/10k/12.5k/15kHz
TREBLE GAIN : ±20dB
Q : 0.75
20
10k
Fig.9 Middle Q vs Freq
25
TREBLE GAIN:-20～+20dB
/1dB step
fo : 7.5kHz Q : 0.75
Output
Noise[uVrm
Gain[dB]
Gain (dB)
25
20
15
10
5
0
-5
-10
-15
-20
-25
1k
Frequency [Hz]
Frequency [Hz]
Fig.7 Middle Gain vs Freq
100k
Fig.6 Bass Q vs Freq
fo : 500/1k/1.5k/2.5kHz
-20
-25
10
100k
Q : 0.5/1/1.5/2
BASS GAIN : ±20dB
fo : 60Hz
0
-5
-10
-15
-20
-25
10
Fig.5 Bass fo vs Freq
Gain[dB]
Gain[dB]
Fig.4 Bass Gain vs Freq
25
20
15
10
5
0
-5
-10
-15
-20
-25
10
Frequency [Hz]
Fre
quency
(Hz)
Fig.3Gain
Gain
vs
Freq
Fig.12
vs
Freq
Gain[dB]
Gain[dB]
-20
-25
10
-4
-5
0.001
10
1
Vout [Vrms]
BASS GAIN : -20～+20dB
/1dB step
fo : 60Hz Q : 0.5
15
10
5
0
-5
-10
-15
0.1
Fig.2 Thd
vs
Vout (V
) Vo
Fig.1 Iq vs Vcc
25
20
0.01
Gain[dB]
0
10
5
0
-5
-10
-15
-20
-20
-25
-25
10
100
1k
10k
100k
Frequency [Hz]
Fig.11 Treble fo vs Freq
5/25
10
100
1k
10k
100k
Frequency [Hz]
Frequency (Hz)
Fig.12 Treble Q vs Freq
2010.03 - Rev.A
Technical Note
BD37524FS
1000
1000
100
10
DIN-Audio
100
10
1
1
-80 -70 -60 -50 -40 -30 -20 -10 0
10 20
-20 -15 -10 -5
Volume Gain[dB]
0
5
1
10 15 20
-20 -15 -10 -5 0 5 10 15 20
Middle Gain [dB]
Fig.15 Middle Gain vs Noise
0
2.5
最大出力[Vrms]
-20
-30
Vo [Vrms]
Gain[dB]
Gain
(dB
10
-40
-50
-60
1
-20 -15 -10 -5 0 5 10 15 20
Treble Gain [dB]
Fig.16 Treble Gain vs Noise
10
-10
IHF-A
100
IHF-A
100
Fig.14 Bass Gain vs Noise
1000
DIN-Audio
DIN-Audio
Bass Gain [dB]
Fig.13 Volume Gain vs Noise
Output Noise[uVrms]
出力雑音電圧
[uVrms]
IHF-A
出力雑音電圧 [uVrms]
IHF-A
Output Noise[uVrms]
Din-Audio
出力雑音電圧 [uVrms]
出力雑音電圧[uVrms]
Output Noise[uVrms]
1000
-70
10
2.0
1.5
1.0
0.5
0.0
100
1k
10k
100k
100
1000
10000
Rload [ohm]
出力負荷[ohm]
Frequency [Hz]
100000
Frequency(Hz)
Fig.17 CMRR vs Freq
Fig.18 Rload vs Vo
3.5
3
2.5
Vout[V]
2
1.5
1
0.5
0
0
Fig.19 Advanced Switch 1
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Fig.20 Advanced Switch 2
6/25
0.5
1
1.5
2
Vin [Vrms]
2.5
3
Fig.21 Level Meter Vin vs Vo
2010.03 - Rev.A
Technical Note
BD37524FS
●Block diagram and pin configuration
21
20
19
18
17
Fader★
22
Fader★
23
Fader★
24
16
15
14
13
VCC
GND
I2C BUS LOGIC
Fader★
Fader★
■Fader
Gain:+15dB～-79ｄB/1dB step
★no pop noise
■LPF
fc=55/85/120/160Hz
■Loudness
Gain:20dB～0ｄB/1ｄB step
★no pop noise
・ｆ0=250/400/800Hz
・Hicut:1/2/3/4
■3 Band P-EQ (Tone control)
Gain：+20dB～-20dB/1dB step
★no pop noise
・Bass：f0=60/80/100/120Hz
Q=0.5/1.0/1.5/2.0
・Meddle:f0=500/1k/1.5k/2.5kHz
Q=0.75/1/1.25/1.5
・Treble：f0=7.5k/10k/12.5k/15kHz
Q=0.75/1.25
■Volume
Gain：+15dB～-79dB/1dB step
★no pop noise
■Input Gain
Gain：+20dB～0dB/1dB step
★no pop noise
LPF
★Loudness
★3 Band P-EQ
(Tone control)
★Volume/Mute
Level
meter
★Input Gain
Input selector (4 single-end and 1 stereo ISO)
GND
ISO amp
GND
ISO amp
VCC/2
100k
1
2
100k
3
100k
4
100k
5
250k
250k
6
7
250k
8
250k
9
250k
10
250k
11
250k
12
Fig.22 BD37524FS
Descriptions of terminal
Terminal
Terminal
Description
No.
Name
1
FIL
VCC/2 terminal
Terminal
No.
13
Terminal
Name
MUTE
Description
External compulsory mute terminal
2
A1
A input terminal of 1ch
14
LOUT
Output terminal for Level meter
3
A2
A input terminal of 2ch
15
OUTS2
Subwoofer output terminal of 2ch
4
B1
B input terminal of 1ch
16
OUTS1
Subwoofer output terminal of 1ch
5
B2
B input terminal of 2ch
17
OUTR2
Rear output terminal of 2ch
6
CP1
C positive input terminal of 1ch
18
OUTR1
Rear output terminal of 1ch
7
CN
C negative input terminal
19
OUTF2
Front output terminal of 2ch
8
CP2
C positive input terminal of 2ch
20
OUTF1
Front output terminal of 1ch
9
D1
VCC
Power supply terminal
D2
D input terminal of 1ch
D input terminal of 2ch
21
10
22
SCL
I2C Communication clock terminal
11
E1
E input terminal of 1ch
23
SDA
I2C Communication data terminal
12
E2
E input terminal of 2ch
24
GND
GND terminal
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7/25
2010.03 - Rev.A
Technical Note
BD37524FS
●Timming Chart
CONTROL SIGNAL SPECIFICATION
(１) Electrical specifications and timing for bus lines and I/O stages
SDA
t
BUF
t
t
LOW
t
R
t
F
HD;STA
t
SP
SCL
t
HD;STA
P
t
HD;DAT
t
HIGH
t
SU;DAT
t
SU;STA
t
SU;STO
Sr
S
P
Fig.23 Definition of timing on the I2C-bus
2
Table 1 Characteristics of the SDA and SCL bus lines for I C-bus devices
(Unless specified particularly, Ta=25℃, VCC=8.5V)
Parameter
1
2
3
4
5
6
7
8
9
Symbol
SCL clock frequency
Bus free time between a STOP and START condition
Hold time (repeated) START condition. After this period, the first
clock pulse is generated
LOW period of the SCL clock
HIGH period of the SCL clock
Set-up time for a repeated START condition
Data hold time:
Data set-up time
Set-up time for STOP condition
Fast-mode I2C-bus
Max.
400
－
Unit
ｆSCL
tBUF
Min.
0
1.3
tHD;STA
0.6
－
μS
tLOW
tHIGH
tSU;STA
tHD;DAT
tSU;DAT
tSU;STO
1.3
0.6
0.6
0.06*
120
0.6
－
－
－
－
－
－
μS
μS
μS
μS
ns
μS
kHz
μS
All values referred to VIH min. and VIL max. Levels (see Table 2).
* A device must internally provide a hold time of at least 300 ns for the SDA signal (referred to the VIH min. of the SCL
signal) in order to bridge the undefined region of the falling edge of SCL.
About 7(tHD;DAT), 8(tSU;DAT), make it the setup which a margin is fully in .
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8/25
2010.03 - Rev.A
Technical Note
BD37524FS
Table 2
2
Characteristics of the SDA and SCL I/O stages for I C-bus devices
Parameter
10
11
12
13
14
Symbol
LOW level input voltage:
HIGH level input voltage:
Pulse width of spikes which must be suppressed by the input filter.
LOW level output voltage: at 3mA sink current
Input current each I/O pin with an input voltage between 0.4V and
4.5V.
ｔHD;STA
：2us
ｔHD;DAT
：1us
Fast-mode devices
Unit
VIL
VIH
tSP
VOL1
Min.
-0.3
2.3
0
0
Max.
1
5
50
0.4
V
V
ns
V
Ii
-10
10
μA
ｔSU;DAT
：1us
ｔSU;STO
：2us
SCL
ｔBUF
：4us
ｔLOW
：3us
ｔHIGH
：1us
SDA
SCL clock frequency：250kHz
Fig.24 A command timing example in the I2C data transmission
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9/25
2010.03 - Rev.A
Technical Note
BD37524FS
（２）I2C BUS FORMAT
MSB
S
1bit
LSB
Slave Address
8bit
S
Slave Address
MSB
LSB
MSB
LSB
A
Select Address
A
Data
A
P
1bit
8bit
1bit
8bit
1bit 1bit
= Start conditions (Recognition of start bit)
= Recognition of slave address. 7 bits in upper order are voluntary.
The least significant bit is “L” due to writing.
A
= ACKNOWLEDGE bit (Recognition of acknowledgement)
Select Address = Select every of volume, bass and treble.
Data
= Data on every volume and tone.
P
= Stop condition (Recognition of stop bit)
（３）I2C BUS Interface Protocol
1）Basic form
S
Slave Address
MSB
LSB
A
MSB
Select Address
LSB
A
MSB
Data
LSB
A
P
2）Automatic increment (Select Address increases (+1) according to the number of data.
S
Slave Address
A
Select Address
A
Data1
A
Data2
A ････
DataN
A
MSB
LSB
MSB
LSB
MSB
LSB
MSB
LSB
MSB
LSB
(Example) ①Data1 shall be set as data of address specified by Select Address.
②Data2 shall be set as data of address specified by Select Address +1.
③DataN shall be set as data of address specified by Select Address +N-1.
P
3）Configuration unavailable for transmission (In this case, only Select Address1 is set.
S Slave Address A Select Address1 A Data
A Select Address 2 A Data
A P
MSB
LSB MSB
LSB
MSB
LSB
MSB
LSB
MSB
LSB
（Note）If any data is transmitted as Select Address 2 next to data, it is
recognized as data, not as Select Address 2.
（４）Slave address
MSB
LSB
A6
1
A5
0
A4
0
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© 2010 ROHM Co., Ltd. All rights reserved.
A3
0
A2
0
A1
0
10/25
A0
0
R/W
0
80H
2010.03 - Rev.A
Technical Note
BD37524FS
（５）Select Address & Data
Items
Select
Address
(hex)
Initial setup 1
01
Initial setup 2
02
Initial setup 3
Input Selector
03
05
Input gain
06
Volume gain
Fader 1ch Front
Fader 2ch Front
Fader 1ch Rear
Fader 2ch Rear
Fader Subwoofer
Bass setup
Middle setup
Treble setup
20
28
29
2A
2B
2C
41
44
47
Bass gain
51
Middle gain
54
Treble gain
57
Loudness Gain
System Reset
75
FE
MSB
D7
Advanced
switch
ON/OFF
LPF
Phase
0
0
Mute
ON/OFF
0
0
0
Bass
Boost/
Cut
Middle
Boost/
Cut
Treble
Boost/
Cut
0
1
Data
D6
0
Level
Meter
RESET
0
0
0
D5
D4
Advanced switch time
of Input Gain/Volume
Tone/Fader/Loudness
LSB
D3
D2
0
0
0
Subwoofer
LPF fc
LPF
Phase
0
Input selector
0
0
0
0
0
Loudness fo
D0
Advanced switch time
of Mute
Level
Meter
RESET
1
Input Gain
0
Volume Gain / Attenuation
Fader Gain / Attenuation
Fader Gain / Attenuation
Fader Gain / Attenuation
Fader Gain / Attenuation
Fader Gain / Attenuation
Bass fo
0
Middle fo
0
Treble fo
0
0
0
0
D1
0
0
0
Bass Q
Middle Q
0
Treble Q
0
0
Bass Gain
0
0
Middle Gain
0
0
Treble Gain
Loudness Hicut
0
0
0
0
Loudness Gain
0
0
1
Advanced switch
Note
１．In function changing of the hatching part, it works Advanced switch.
２．Upon continuous data transfer, the Select Address is circulated by the automatic increment function, as
shown below.
→01→02→03→05→06→20→28→29→2A→2B→2C
→41→44→47→51→54→57→75
３．For the function of input selector etc, it is not corresponded for advanced switch. Therefore, please apply mute on
the side of a set when changes these setting.
４．When using mute function of this IC at the time of changing input selector, please switch mute ON/OFF for waiting
advanced-mute time.
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© 2010 ROHM Co., Ltd. All rights reserved.
11/25
2010.03 - Rev.A
Technical Note
BD37524FS
Select address 01 (hex)
MSB
Time
D7
0.6msec
Advanced
1.0msec
Switch
1.4msec
ON/OFF
3.2msec
MSB
Time
D7
4.7 msec
7.1 msec
11.2 msec
14.4 msec
Advanced
Switch
ON/OFF
Mode
MSB
D7
OFF
0
ON
1
Advanced
D6
D5
0
switch time
D4
D3
Advanced switch time
of Input gain/Volume
Tone/Fader/Loudness
0
of
D2
0
Mute
D1
0
0
1
1
LSB
D0
0
1
0
1
Advanced switch time of
LSB
Input gain/Volume/Tone/Fader/Loudness
D6
D5
D4
D3
D2
D1
D0
0
0
0
1
Advanced switch Time
0
0
0
of Mute
1
0
1
1
D6
0
Advanced switch
D5
D4
D3
Advanced switch time
of Input gain/Volume
0
Tone/Fader/Loudness
ON/OFF
D2
0
D1
LSB
D0
Advanced switch
Time of Mute
Select address 02(hex)
fc
MSB
D7
OFF
55Hz
85Hz
120Hz
160Hz
Prohibition
LPF Phase
Mode
MSB
D7
HOLD
RESET
LPF Phase
Phase
MSB
D7
0°
0
180°
D6
Level
Meter
RESET
D6
0
1
Subwoofer
D5
D4
0
0
LPF
D3
0
fc
D2
0
0
0
0
1
Level Meter RESET
D5
D4
D3
D2
0
0
D5
1
D6
Level
Meter
RESET
f0
MSB
D7
D6
D5
250Hz
400Hz
800Hz
Prohibition
0
0
0
LPF
D4
0
0
0
Phase
D3
LSB
D0
0
1
0
1
0
D1
0
0
1
1
0
Other setting
D1
LSB
D0
Subwoofer LPF fc
D2
0
D1
LSB
D0
Subwoofer LPF fc
Select address 03(hex)
Loudness fo
D4
D3
0
0
0
1
1
0
1
1
D2
D1
LSB
D0
0
0
1
: Initial condition
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© 2010 ROHM Co., Ltd. All rights reserved.
12/25
2010.03 - Rev.A
Technical Note
BD37524FS
Select address 05(hex)
MSB
Input Selector
LSB
OUT
OUT
Mode
F1/R1
F2/R2
D7
D6
D5
D4
D3
D2
D1
D0
A
A1
A2
0
0
0
1
B
B1
B2
0
0
1
0
C diff
CP1
CP2
0
1
1
0
D
D1
D2
1
0
1
0
0
0
0
0
E
E1
E2
1
0
1
1
Input SHORT
1
0
0
1
Prohibition
Other setting
Input SHORT：The input impedance of each input terminal is lowered from 100kΩ(TYP) to 6 kΩ(TYP).
(For quick charge of coupling capacitor)
Select address 06 (hex)
MSB
Gain
D7
0dB
1dB
2dB
3dB
4dB
5dB
6dB
7dB
8dB
9dB
10dB
11dB
Mute
ON/OFF
12dB
13dB
14dB
15dB
16dB
17dB
18dB
19dB
20dB
D6
D5
0
0
D6
D5
0
0
Input
D4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
：
1
Prohibition
Mode
OFF
ON
MSB
D7
0
1
Mute
D4
Gain
D3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
1
：
1
ON/OFF
D3
D2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
0
：
1
D1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
：
1
LSB
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
：
1
D2
D1
LSB
D0
Input Gain
: Initial condition
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© 2010 ROHM Co., Ltd. All rights reserved.
13/25
2010.03 - Rev.A
Technical Note
BD37524FS
Select address 20, 28, 29, 2A, 2B, 2C (hex)
MSB
Vol,
Gain & ATT
D7
D6
0
0
0
0
Prohibition
：
：
0
1
15dB
0
1
14dB
0
1
13dB
0
1
：
：
：
-77dB
1
1
-78dB
1
1
-79dB
1
1
1
1
Prohibition
：
：
1
1
-∞dB
1
1
Fader
D5
0
0
：
1
1
1
1
：
0
0
0
0
：
1
1
Gain
D4
0
0
：
1
1
1
1
：
0
0
0
1
：
1
1
/ Attenuation
D3
D2
D1
0
0
0
0
0
0
：
：
：
0
0
0
0
0
0
0
0
1
0
0
1
：
：
：
1
1
0
1
1
1
1
1
1
0
0
0
：
：
：
1
1
1
1
1
1
LSB
D0
0
1
：
0
1
0
1
：
1
0
1
0
：
0
1
: Initial condition
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© 2010 ROHM Co., Ltd. All rights reserved.
14/25
2010.03 - Rev.A
Technical Note
BD37524FS
Select address 41(hex)
Q factor
MSB
D7
D6
0.5
1.0
1.5
2.0
0
0
fo
MSB
D7
D6
60Hz
80Hz
100Hz
120Hz
0
0
Q factor
MSB
D7
D6
Middle
D5
D4
0.75
1.0
1.25
1.5
0
0
Middle fo
fo
MSB
D7
D6
500Hz
1kHz
1.5kHz
2.5kHz
0
0
Q factor
MSB
D7
D6
Treble
D5
D4
0.75
1.25
0
0
Treble fo
fo
MSB
D7
D6
7.5kHz
10kHz
12.5kHz
15kHz
0
0
D5
Bass
D4
Q
factor
D3
D2
Bass fo
Bass
D4
0
1
0
1
D5
0
0
1
1
0
0
fo
D3
D2
0
0
D1
0
0
1
1
LSB
D0
0
1
0
1
D1
LSB
D0
Bass
Q factor
Select address 44(hex)
D5
0
0
1
1
Q
Middle
D4
0
1
0
1
factor
D3
D2
0
0
fo
D3
D2
0
0
D1
0
0
1
1
LSB
D0
0
1
0
1
D1
LSB
D0
Middle
Q factor
Select address 47 (hex)
D5
0
0
1
1
Q
Treble
D4
0
1
0
1
factor
D3
D2
D1
0
0
0
fo
D3
D2
D1
0
0
0
LSB
D0
0
1
LSB
D0
Treble
Q factor
: Initial condition
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15/25
2010.03 - Rev.A
Technical Note
BD37524FS
Select address 51, 54, 57 (hex)
MSB
Gain
D7
0dB
1dB
2dB
3dB
4dB
5dB
6dB
7dB
8dB
9dB
10dB
Bass/
11dB
Middle/
12dB
Treble
Boost
13dB
/cut
14dB
15dB
16dB
17dB
18dB
19dB
20dB
D6
Bass/
D5
0
0
Prohibition
Mode
Boost
Cut
MSB
D7
0
1
Bass/
D6
0
Middle/
D4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
：
1
1
Middle/
D5
D4
0
Treble
D3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
：
1
1
Treble
D3
Gain
D2
D1
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
0
0
0
0
0
1
0
1
1
0
1
0
：
：
1
1
1
1
Boost/Cut
D2
D1
LSB
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
：
0
1
LSB
D0
Bass/Middle/Treble Gain
: Initial condition
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© 2010 ROHM Co., Ltd. All rights reserved.
16/25
2010.03 - Rev.A
Technical Note
BD37524FS
Select address 75 (hex)
MSB
Mode
D7
Hicut1
Hicut2
0
Hicut3
Hicut4
Gain
0dB
1dB
2dB
3dB
4dB
5dB
6dB
7dB
8dB
9dB
10dB
11dB
12dB
13dB
14dB
15dB
16dB
17dB
18dB
19dB
20dB
MSB
D7
0
Prohibition
D6
0
0
1
1
D5
0
1
0
1
Loudness
D4
Hicut
D3
D2
LSB
D0
D1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
：
1
LSB
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
：
1
Loudness Gain
Loudness Gain
D4
D3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
Loudness Hicut
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
0
1
0
：
：
1
1
D6
D1
D5
D2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
：
1
: Initial condition
（６）About power on reset
At on of supply voltage circuit made initialization inside IC is built-in. Please send data to all address
as initial data at supply voltage on. And please supply mute at set side until this initial data is sent.
Limit
Item
Symbol
Unit
Condition
Min.
Typ.
Max.
Rise time of VCC
Trise
33
－
－
usec
VCC rise time from 0V to 5V
VCC voltage of release
Vpor
－
4.1
－
V
power on reset
（７）About external compulsory mute terminal
Mute is possible forcibly than the outside after input again department, by the setting of the MUTE terminal.
Mute Voltage Condition
GND～1.0V
2.3V～VCC
Mode
MUTE ON
MUTE OFF
Establish the voltage of MUTE in the condition to have been defined.
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17/25
2010.03 - Rev.A
Technical Note
BD37524FS
Volume / Fader volume attenuation of the details
(dB)
+15
+14
+13
+12
+11
+10
+9
+8
+7
+6
+5
+4
+3
+2
+1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
-11
-12
-13
-14
-15
-16
-17
-18
-19
-20
-21
-22
-23
-24
-25
-26
-27
-28
-29
-30
-31
-32
D7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D6
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
D4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
D3
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
D2
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
D1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
(dB)
-33
-34
-35
-36
-37
-38
-39
-40
-41
-42
-43
-44
-45
-46
-47
-48
-49
-50
-51
-52
-53
-54
-55
-56
-57
-58
-59
-60
-61
-62
-63
-64
-65
-66
-67
-68
-69
-70
-71
-72
-73
-74
-75
-76
-77
-78
-79
-∞
D0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
D7
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
D4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
D3
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
D2
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
D1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
D0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
：Initial condition
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18/25
2010.03 - Rev.A
Technical Note
BD37524FS
About Level meter
（１） The operation of circuit
Level meter is a function which gives DC voltage proportional to the size of signal of sound. It detects
the peak level of signal and keeps the peak level, so that it is possible to monitor the size of signal by
resetting DC voltage kept with suitable interval.
（２） The way to reset level meter output
Please send reset data through I2C BUS
When reset output of level meter：Send D6 = “ 1 “ of select address 02(hex).
When cancel of output reset of level meter (HOLD)… → Send D6 = “ 0 “ of select address 02(hex).
（３） The settings about period of reset
Peak hold operation will start after HOLD data is transmitted. Set the WAIT time after HOLD data
according to the frequency bandwidth detected.
WAIT time must be set to a minimum of one cycle over the detected frequency bandwidth.
Ex) Detected frequency bandwidth is above 40Hz, 『40Hz = 25ms = WAIT time』
transmission
Transmission Example by I2C BUS
(RESET)
2
I CBUS
80 10 02
RESET
START
40
(HOLD)
80
02
00
Wait time
(25msec)
HOLD
START
※fin＝40Hz
LOUT [ V ]
detect
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19/25
t
2010.03 - Rev.A
Technical Note
BD37524FS
●Application circuit
GND
SDA
SCL
VCC
OUTF1 OUTF2 OUTR1 OUTR2 OUTS1 OUTS2 LOUT
10μ
0.1μ
10μ
21
20
19
18
17
Fader★
22
10μ
Fader★
23
10μ
Fader★
24
10μ
10μ
16
MUTE
10μ
15
14
13
VCC
GND
I2C BUS LOGIC
Fader★
Fader★
■Fader
Gain:+15dB～-79ｄB/1dB step
★no pop noise
■LPF
fc=55/85/120/160Hz
■Loudness
Gain:20dB～0ｄB/1ｄB step
★no pop noise
・ｆ0=250/400/800Hz
・Hicut:1/2/3/4
■3 Band P-EQ (Tone control)
Gain：+20dB～-20dB/1dB step
★no pop noise
・Bass：f0=60/80/100/120Hz
Q=0.5/1.0/1.5/2.0
・Meddle:f0=500/1k/1.5k/2.5kHz
Q=0.75/1/1.25/1.5
・Treble：f0=7.5k/10k/12.5k/15kHz
Q=0.75/1.25
■Volume
Gain：+15dB～-79dB/1dB step
★no pop noise
■Input Gain
Gain：+20dB～0dB/1dB step
★no pop noise
LPF
★Loudness
★3 Band P-EQ
(Tone control)
★Volume/Mute
Level
meter
★Input Gain
Input selector (4 single-end and 1 stereo ISO)
GND
ISO amp
GND
ISO amp
VCC/2
100k
1
2
10μ
100k
3
2.2μ
Single1
100k
4
2.2μ
100k
5
2.2μ
Single2
250k
6
2.2μ
250k
7
2.2μ
250k
8
10μ
GND Isolation
250k
10
9
2.2μ
250k
1μ
Single3
250k
11
1μ
250k
12
1μ
1μ
Unit
R : [Ω]
C : [F]
Single4
Fig.25 Application Circuit Diagram
Notes on wiring
① Please connect the decoupling capacitor of a power supply in the shortest distance as much as possible to GND.
② Lines of GND shall be one-point connected.
③ Wiring pattern of Digital shall be away from that of analog unit and cross-talk shall not be acceptable.
④ Lines of SCL and SDA of I2C BUS shall not be parallel if possible.
The lines shall be shielded, if they are adjacent to each other.
⑤ Lines of analog input shall not be parallel if possible. The lines shall be shielded, if they are adjacent
to each other.
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© 2010 ROHM Co., Ltd. All rights reserved.
20/25
2010.03 - Rev.A
Technical Note
BD37524FS
●Interfaces
Terminal
No.
Terminal
Name
Terminal
Voltage
Equivalent Circuit
A terminal for signal input.
The input impedance is 100kΩ(typ).
Vcc
2
A1
3
A2
4
B1
5
B2
Terminal Description
4.25
100K
GND
6
CP1
7
CN
8
CP2
9
D1
10
D2
11
E1
12
E2
A terminal for signal input.
The input impedance is 250kΩ(typ).
Vcc
4.25
250k
GND
A terminal for external compulsory mute.
If terminal voltage is High level, the
mute is off. And if the terminal voltage
is Low level, the mute is on.
Vcc
13
MUTE
－
1.65V
GND
A terminal for fader and Subwoofer output.
VCC
16
OUTS1
17
OUTR2
18
OUTR1
19
OUTF2
20
OUTF1
4.25
GND
The figure in the pin explanation and input/output equivalent circuit is reference value, it doesn’t guarantee the value.
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© 2010 ROHM Co., Ltd. All rights reserved.
21/25
2010.03 - Rev.A
Technical Note
BD37524FS
Terminal
No.
Terminal
Name
Terminal
Voltage
Equivalent Circuit
Terminal Description
Power supply terminal.
21
VCC
8.5
A terminal for clock input of I2C BUS
communication.
Vcc
22
SCL
－
1.65V
GND
A terminal for data input of I2C BUS
communication.
Vcc
23
SDA
－
1.65V
GND
Ground terminal.
24
GND
0
Voltage for reference bias of analog
signal system. The simple precharge
circuit and simple discharge circuit for
an external capacitor are built in.
Vcc
50k
1
FIL
4.25
50k
GND
The figure in the pin explanation and input/output equivalent circuit is reference value, it doesn’t guarantee the value.
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22/25
2010.03 - Rev.A
Technical Note
BD37524FS
●Notes for use
1. Absolute maximum rating voltage
When it impressed the voltage on VCC more than the absolute maximum rating voltage, circuit currents increase
rapidly, and there is absolutely a case to reach characteristic deterioration and destruction of a device.
In particular in a serge examination of a set, when it is expected the impressing serge at VCC terminal (21pin),
please do not impress the large and over the absolute maximum rating voltage (including a operating voltage
+ serge ingredient (around 14V)).
2. About a signal input part
1) About constant set up of input coupling capacitor
In the signal input terminal, the constant setting of input coupling capacitor C(F) be sufficient input
impedance RIN(Ω) inside IC and please decide. The first HPF characteristic of RC is composed.
G〔dB〕
C〔F〕
0
RIN
A(f)
〔Ω〕
Ｓ
Ｓ
f〔Hz〕
INPUT
A(f) 
(2πfCRIN) 2
1  (2πfCRIN) 2
2) About the input selector SHORT
SHORT mode is the command which makes switch SSH =ON an input selector part and input impedance RIN of
all terminals, and makes resistance small. Switch SSH is OFF when not choosing a SHORT command.
A constant time becomes small at the time of this command twisting to the resistance inside the capacitor
connected outside and LSI. The charge time of a capacitor becomes short. Since SHORT mode turns ON the
switch of SSH and makes it low impedance, please use it at the time of a non-signal.
3. About Mute terminal(13pin) when power supply is off
Any voltage shall not be supplied to Mute terminal (13pin) when power-supply is off.
Please insert a resistor (about 2.2kΩ) to Mute terminal in series, if voltage is supplied to mute terminal
in case. (Please refer Application Circuit Diagram.)
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23/25
2010.03 - Rev.A
Technical Note
BD37524FS
●Thermal Derating Curve
About the thermal design by the IC
Characteristics of an IC have a great deal to do with the temperature at which it is used, and exceeding absolute
maximum ratings may degrade and destroy elements. Careful consideration must be given to the heat of the IC from the
two standpoints of immediate damage and long-term reliability of operation.
Reference data
SSOP-A24
Power Dissipation Pd（W）
1.5
Measurement condition: ROHM Standard board
board Size：70×70×1.6(㎣)
material：A FR4 grass epoxy board
(3% or less of copper foil area)
1.0W
1.0
θja = 125℃/W
0.5
0.0
0
25
50
75
85
100
125
150
Ambient Temperature Ta（℃）
Fig.26 Temperature Derating Curve
Note) Values are actual measurements and are not guaranteed.
Power dissipation values vary according to the board on which the IC is mounted.
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24/25
2010.03 - Rev.A
Technical Note
BD37524FS
●Ordering part number
B
D
3
Part No.
7
5
2
4
F
Part No.
37524
S
-
Package
FS : SSOP-A24
E
2
Packaging and forming specification
E2: Embossed tape and reel
SSOP-A24
10 ± 0.2
(MAX 10.35 include BURR)
0.8
0.1
1.2±0.15
7.8±0.3
0.5±0.2
12
1.8±0.1
1
0.1±0.1
<Tape and Reel information>
Tape
Embossed carrier tape
Quantity
2000pcs
13
5.4±0.2
24
+6°
4° −4°
Direction
of feed
E2
The direction is the 1pin of product is at the upper left when you hold
( reel on the left hand and you pull out the tape on the right hand
)
+0.1
0.17 −0.05
1pin
0.38±0.1
(Unit : mm)
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© 2010 ROHM Co., Ltd. All rights reserved.
Reel
25/25
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
2010.03 - Rev.A
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specified herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices).
The Products specified in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any
of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specified herein that may
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More detail product informations and catalogs are available, please contact us.
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R1010A