ROHM BH7649KS2

High-performance Video Signal Switchers
Video・Audio Signal Switchers
for Car Navigation Car DVD Player
BH7649KS2
No.11066EAT05
●Description
BH7649KS2 is built-in video switch, audio switch and isolation amplifier in a single chip.
●Features
1) Video inputs selector: 7-inputs composite, Video outputs: 2-outputs 75Ω video driver, 2-outputs AMP
2) Built in Video gain switch (-6dB / -3dB / 0dB / 3dB)
3) Built in Video LPF switch (6.75MHz / Through)
4) Built in sag compensation circuit
5) Enables two load drivers
6) Video driver: Able to be used without load
7) Video driver : Able to be used without output coupling capacitor(one load)
8) Audio inputs selector: 5-inputs(Lch, Rch), Audio outputs : 2-outputs(Lch, Rch)
9) Built in Audio gain switch (0dB / -6dB)
10) Built in Audio LPF switch (24kHz / Through)
11) Built in MUTE function
12) Audio/Video all inputs: Built in isolator function
13) Selectable isolator function for different Audio/Video input channels
2
2
14) Serial control with I C-BUS (I C-BUS is compatible with fast mode of Version2.0)
15) Optional Slave address modifications (90H / 92H)
●Applications
Car navigation, Car DVD
●Absolute maximum ratings (Ta=+25℃)
Parameter
Symbol
Ratings
Unit
Supply voltage VVcc
VVccmax
10
V
Supply voltage AVcc
AVccmax
10
V
Pd
1900 *1
mW
VI2CIN
-0.2 ~ 7.0
V
VIN1
-0.2 ~ 5.1
V
VDIN1
-0.2 ~ VVcc+0.2
V
VAIN1
-0.2 ~ AVcc+0.2
V
Tstg
-55~+125
℃
Symbol
Ratings
Unit
Supply voltage VVcc
VVcc
+7.5 ~ +9.5
V
Supply voltage AVcc
AVcc
+7.5 ~ +9.5
V
Operating temperature range
Topr
-40 ~ +85
℃
Power dissipation
2
Input voltage range I C-BUS input
(SCL, SDA)
Input voltage range Video selector, LOGIC
(VIN1, VRET1, VIN2, VRET2, VIN3, VRET3, VIN4, VRET4,
VIN5, VRET5, VIN6, VRET6, VIN7, VRET7, ADR)
Input voltage range Video driver
(VDIN1, VDIN2)
Input voltage range Audio seletor
(LIN1, ARET1, RIN1, LIN2, ARET2, RIN2, LIN3, ARET3, RIN3,
LIN4, ARET4, RIN4, LIN5, ARET5, RIN5)
Storage temperature range
*1 When mounting on a 70mm×70mm×1.6mm 4-layer glass epoxy board
Reduced by 19mW/℃ at Ta = +25℃ or higher
●Operating conditions
Parameter
* This product is not designed for protection against radioactive rays.
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© 2011 ROHM Co., Ltd. All rights reserved.
1/12
2011.04 - Rev.A
BH7649KS2
Technical Note
●Electric characteristic (Unless otherwise specified, Ta=+25℃, VVcc=8.5V, AVcc=8.5V)
Limits
Parameter
Symbol
Unit
Min.
Typ.
Max.
CHIP
Circuit current1
ICC1
-
34
48
mA
No signal(VIDEO)
Circuit current2
ICC2
GVM6V
GVM3V
GV0V
GV3V
GV6V
GF11V
GF12V
-6.4
-3.4
-0.4
2.6
5.6
-1.5
-
23
-6.0
-3.0
0.0
3.0
6.0
0.0
-30
32
-5.6
-2.6
0.4
3.4
6.4
1.0
-20
mA
dB
dB
dB
dB
dB
dB
dB
GF2V
-0.6
0.9
1.9
dB
GF2V
-0.7
0.8
1.8
dB
GF2V
-0.7
0.8
1.8
dB
GF2V
-1.0
0.5
1.5
dB
No signal(AUDIO)
Vin=1.0Vpp, f=100kHz
Vin=1.0Vpp, f=100kHz
Vin=1.0Vpp, f=100kHz
Vin=1.0Vpp, f=100kHz
Vin=1.0Vpp, f=100kHz
Vin=1.0Vpp, f=6.75MHz/100kHz
Vin=1.0Vpp, f=27MHz/100kHz
Vin=1.0Vpp, f=10MHz/100kHz
Gain=-6dB
Vin=1.0Vpp, f=10MHz/100kHz
Gain=-3dB
Vin=1.0Vpp, f=10MHz/100kHz
Gain=0dB
Vin=1.0Vpp, f=10MHz/100kHz
Gain=3dB
GF3V
-3.0
-0.5
1.0
dB
VOMV
2.6
-
-
Vp-p
CTV
-
-60
-50
dB
Vin=1.0Vpp, f=4.43MHz
-6dB
-3dB
Voltage gain
0dB
3dB
6dB
Frequency characteristics1
[f=6.75MHz LPF MODE]
Frequency characteristics 2_1
[THROUGH MODE_-6dB]
Frequency characteristics 2_2
[THROUGH MODE_-3dB]
VIDEO Frequency characteristics 2_3
[THROUGH MODE_0dB]
Frequency characteristics 2_4
[THROUGH MODE_3dB]
Frequency characteristics 3
[VDOUT1, VDOUT2]
Maximum output level
Cross talk
MUTE attenuation
AUDIO
Conditions
Vin=1.0Vpp, f=15MHz
f=10kHz, THD=1.0%
MTV
-
-60
-50
dB
Vin=1.0Vpp, f=4.43MHz
Common mode rejection ratio
0dB
Voltage gain
-6dB
Frequency characteristics 1
[f=24kHz LPF MODE]
Frequency characteristics 2
[THROUGH MODE]
CMRR
GV0A
GV6A
GF11A
GF12A
-0.4
-6.4
-2.0
-
-60
0.0
-6.0
-0.5
-26
-40
0.4
-5.6
1.0
-15
dB
dB
dB
dB
dB
Vin=1Vpp, f=20kHz
Vin=1Vrms, f=1kHz
Vin=1Vrms, f=1kHz
Vin=1Vrms, f=24kHz/1kHz
Vin=1Vrms, f=96kHz/1kHz
GF2A
-1.0
0.0
1.0
dB
Vin=1Vrms, f=50kHz/1kHz
Total harmonic distortion
THD+N
-
0.002
0.1
%
Vin=1Vrms, f=1kHz ※1
VOMA
2.0
2.4
-
Vrms
f=1kHz, THD<0.3% ※1
Cross talk
CTA
-
-100
-85
dB
Vin=2Vrms, f=1kHz ※1
MUTE attenuation
MTA
-
-100
-85
dB
Vin=2Vrms, f=1kHz ※1
NA
-
10
-
uVrms
20
-
uVrms
Maximum output level
Residual noise1
[THROUGH MODE]
Residual noise2
[f=24kHz LPF MODE]
Common mode rejection ratio
NA_LPF
-
CMRR
-
-70
-40
dB
(THROUGH MODE select)
※2
LOUT1, ROUT1(LPF select)
※2
Vin=1Vrms, f=1kHz
PSRR
PSRRA
-
-50
-
dB
※3
VIL ※4
Vin1L
0
-
1.0
V
Low Level input voltage
VIH ※4
Vin1H
2.0
-
5.5
V
High
Input bias current
IINI2C
-10
0
10
uA
VoL
0
-
0.4
V
at 3.0mA sink current
VIL
Vin2L
0
-
1.0
V
Low Level input voltage
VIH
Vin2H
2.0
-
5.1
V
High
Input impedance
ZINADR
70
100
130
kΩ
[SCL,SDA]
I2 C
SDA output voltage
Level input voltage
[ADR]
Level input voltage ※5
Pull-Down Resister
400HzHPF + 30kHzLPF ON
IHF-A Filter ON
Vin=0.3Vpp, f=100Hz at VCC, 30kHzLPF ON
<I2C-BUS(SCL,SDA) SPEC> VIL:-0.5[V]~0.3VDD[V], VIH:0.7 VDD[V]~VDD+0.5 or 5.5[V] (VDD:I2C-BUS_Supply voltage)
<BH7649KS2> Be sure to use as VIL:0.0[V]~1.0[V], VIH:2.0[V]~5.5[V]
※5 We recommend that it is connect ADR Pin to 38Pin(VREG Pin) when ADR Pin is used as “H”.
※1
※2
※3
※4
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© 2011 ROHM Co., Ltd. All rights reserved.
2/12
2011.04 - Rev.A
BH7649KS2
Technical Note
●Block Diagram (Audio block)
Audio_SEL1
13
AVcc
9
AGND
0/-6dB
22
LOUT1
0/-6dB
23
R OUT1
0/-6dB
24
LOUT2
0/-6dB
25
R OUT2
Audio_Gain1
LIN1
2
Bias
ARET1
3
Bias
RIN1
4
Bias
LIN2
6
Bias
ARET2
7
Bias
R IN2
8
Bias
LPF_Audio
MUTE
LPF_Audio
MUTE
LIN3
10
Bias
ARET3
11
Bias
RIN3
12
Bias
Audio_SEL2
Audio_Gain2
LI N4
14
Bias
ARET4
15
Bias
RIN4
16
Bias
LIN5
18
Bias
ARET5
19
Bias
MUT E
MUT E
RIN5
20
ABIAS
5
Bias
BIAS
Fig.1 Block Diagram
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© 2011 ROHM Co., Ltd. All rights reserved.
3/12
2011.04 - Rev.A
BH7649KS2
Technical Note
●Block Diagram (Video block)
26 VVcc
Video_SEL1
VIN1 39
VIN2 41
VIN3 43
VIN4 45
VIN5 47
VIN6 49
Bias
VIN7 51
Bias
31 VGND1
Bias
Video_Gain1
Bias
1 VGND2
Bias
Bias
LPF_Video1
-6/-3/
0/3dB
Bias
35 VOUT1
MUTE
VRET1 40
Bias
VRET2 42
VRET3 44
VRET4 46
VRET5 48
VRET6 50
VRET7 52
Bias
Clamp/Bias1
34 VDIN1
Bias
Bias
Bias
Bias
6dB
75Ω
27 VDOUT1
Bias
MUTE
28 VDSAG1
Video_SEL2
Video_Gain2
LPF_Video2
-6/-3/
0/3dB
33 VOUT2
MUTE
Clamp/Bias2
6dB
MUTE
VBIAS 21
BIAS2
VREG 38
VREG
75Ω
32 VDIN2
29 VDOUT2
30 VDSAG2
ADR 17
SDA 36
LOGIC
SCL 37
Fig.2 Block Diagram
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© 2011 ROHM Co., Ltd. All rights reserved.
4/12
2011.04 - Rev.A
BH7649KS2
Technical Note
●Package outlines
BH7649KS2
Lot No.
SQFP-T52(UNIT:mm )
Fig.3 Package outlines
●Pin assignment table
No.
I/O
Pin Name
No.
I/O
Pin Name
No.
I/O
Pin Name
No.
I/O
Pin Name
1
-
VGND2
14
I
LIN4
27
O
VDOUT1
40
I
VRET1
2
I
LIN1
15
I
ARET4
28
O
VDSAG1
41
I
VIN2
3
I
ARET1
16
I
RIN4
29
O
VDOUT2
42
I
VRET2
4
I
RIN1
17
I
ADR
30
O
VDSAG2
43
I
VIN3
5
-
ABIAS
18
I
LIN5
31
-
VGND1
44
I
VRET3
6
I
LIN2
19
I
ARET5
32
I
VDIN2
45
I
VIN4
7
I
ARET2
20
I
RIN5
33
O
VOUT2
46
I
VRET4
8
I
RIN2
21
-
VBIAS
34
I
VDIN1
47
I
VIN5
9
-
AGND
22
O
LOUT1
35
O
VOUT1
48
I
VRET5
10
I
LIN3
23
O
ROUT1
36
I/O
SDA
49
I
VIN6
11
I
ARET3
24
O
LOUT2
37
I
SCL
50
I
VRET6
12
I
RIN3
25
O
ROUT2
38
O
VREG
51
I
VIN7
13
-
AVcc
26
-
VVcc
39
I
VIN1
52
I
VRET7
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© 2011 ROHM Co., Ltd. All rights reserved.
5/12
2011.04 - Rev.A
BH7649KS2
Technical Note
●I2C-BUS Control specification
I2C-BUS Format (WRITE MODE)
SLAVE
S
A DATA1
A DATA2 A DATA3
ADDRESS
S
: Start Condition
A
: Acknowledge
P
: Stop Condition
SLAVE
ADDRESS
A
DATA4
A
DATA5
A
DATA6
A
P
b7
b6
b5
b4
b3
b2
b1
b0
1
0
0
1
0
0
ADR
0
LPF_Video1
LPF_Video2
Video_power
-off1
Video_power
-off2
0
LPF_Audio
DATA1
Video_SEL1
DATA2
Video_Gain1
DATA3
Video_SEL2
Video_Gain2
Audio_SEL1
Clamp/Bias1
Clamp/Bias2
Audio_SEL2
DATA4
0
0
Audio_Gain1
Audio_Gain2
0
0
0
0
DATA5
Isolation_V1
Isolation_V2
Isolation_V3
Isolation_V4
Isolation_V5
Isolation_V6
Isolation_V7
0
DATA6
Isolation_A1
Isolation_A2
Isolation_A3
Isolation_A4
Isolation_A5
0
0
0
When power is turned on, all parts start from LOW condition.
[Prohibited matter] The terminal inputs of ADR do not change from start to stop condition. Operation error might happen.
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© 2011 ROHM Co., Ltd. All rights reserved.
6/12
2011.04 - Rev.A
BH7649KS2
Technical Note
●Selecting input switch / Setting mode
Data name
ADR
Video_SEL1
Status
Sets the slave address by
ADR pin
0 : 90H
ADR pin = “ L ”
1 : 92H
ADR pin =” H ”
Signal input selectors
(Video_SEL1)
000 : VIN1
001 : VIN2
010 : VIN3
Data name
Status
Input mode selectors
(Clamp/Bias1 : VDIN1)
0 : Clamp input mode
(VDOUT1:direct drive)
1 : Bias input mode
(VDOUT1:output coupling “C”)
Input mode selectors
Clamp/Bias2
(Clamp/Bias2 : VDIN2)
0 : Clamp input mode
(VDOUT2 direct drive)
1 : Bias input mode
(VDOUT2:output coupling “C”)
Power-off function selectors
Video_power-off1
(VDIN1 - VDOUT1)
Clamp/Bias1
011 : VIN4
Video_SEL2
LPF_Video1
LPF_Video2
Video_Gain1
Status
Isolation_V1
Isolator function selectors (VIN1)
0 : On
1 : Off
Isolation_V2
Isolator function selectors (VIN2)
0 : On
1 : Off
Isolation_V3
Isolator function selectors (VIN3)
0 : On
0 : On
100 : VIN5
1 : Off
1 : Off
101 : VIN6
Power-off function selectors
(VDIN2 - VDOUT2)
Video_power-off2
Isolation_V4
Isolator function selectors (VIN4)
110 : VIN7
0 : On
0 : On
111 : MUTE
1 : Off
1 : Off
Signal input selectors
(Video_SEL2)
Audio_ SEL1
Signal input selectors
(Audio_ SEL1)
Isolation_V5
Isolator function selectors (VIN5)
000 : VIN1
000 : LIN1, RIN1
0 : On
001 : VIN2
001 : LIN2, RIN2
1 : Off
010 : VIN3
010 : LIN3, RIN3
011 : VIN4
011 : LIN4, RIN4
0 : On
100 : VIN5
100 : LIN5, RIN5
1 : Off
101 : VIN6
101 : MUTE
110 : VIN7
110 : MUTE
0 : On
111 : MUTE
111 : MUTE
1 : Off
LPF function selectors of VOUT1
Audio_ SEL2
Signal input selectors
(Audio_ SEL2)
Isolation_V6
Isolation_V7
Isolation_A1
Isolator function selectors (VIN6)
Isolator function selectors (VIN7)
Isolator function selectors (LIN1,
RIN1)
0 : 6.75MHz
000 : LIN1, RIN1
0 : On
1 : Through
001 : LIN2, RIN2
1 : Off
LPF function selectors of VOUT2
010 : LIN3, RIN3
0 : 6.75MHz
011 : LIN4, RIN4
1 : Through
Isolation_A2
Isolator function selectors (LIN2,
RIN2)
0 : On
100 : LIN5, RIN5
1 : Off
Output gain selectors
(Video_Gain1)
101 : MUTE
Isolator function selectors (LIN3,
RIN3)
00 : -6dB
110 : MUTE
Isolation_A3
0 : On
01 : -3dB
111 : MUTE
1 : Off
10 : 0dB
LPF function selectors of
LOUT1 and ROUT1
Isolator function selectors (LIN4,
RIN4)
LPF_Audio
11 : 3dB
Video_Gain2
Data name
Isolation_A4
0 : Through
0 : On
Output gain selectors
(Video_Gain2)
1 : 24kHz
1 : Off
00 : -6dB
Output gain selectors
(Audio_Gain1)
Isolator function selectors (LIN5,
RIN5)
Audio_ Gain1
01 : -3dB
Isolation_A5
0 : 0dB
0 : On
10 : 0dB
1 : -6dB
1 : Off
11 : 3dB
Output gain selectors
(Audio_Gain2)
Audio_ Gain2
0 : 0dB
1 : -6dB
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© 2011 ROHM Co., Ltd. All rights reserved.
7/12
2011.04 - Rev.A
BH7649KS2
Technical Note
●Application circuit example
C1:0.1μF(at CLAMP m ode)
1.0μF(at BIAS mode)
*1
75
75
*3
*2
10k
10k
MPU
100μ
22μ
C1
1μ
1μ
41
22μ
100μ
SDA
VOUT1
VDIN1
32
31
30
29
28
27
VDOUT1
SCL
VRET1
33
VDSAG1
34
VDOUT2
35
VDSAG2
36
VGND1
37
VD1N2
38
VOUT2
39
VREG
40
C1
22μ
VIN1
1μ
75
75
*2
22μ
VVcc
26
ROUT2
25
LOUT2
24
0.1μ
10kΩ
VIN2
10μ
1μ
42
VRET2
43
VIN3
44
VRET3
45
VIN4
46
VRET4
47
VIN5
48
VRET5
49
VIN6
50
VRET6
51
VIN7
52
VRET7
10kΩ
10μ
1μ
ROUT1
23
LOUT1
22
10kΩ
10μ
1μ
1μ
10kΩ
10μ
VBIAS
21
22μ
1μ
1μ
1μ
RIN5
20
ARET5
19
LIN5
18
1μ
1μ
1μ
1μ
ADR
17
RIN4
16
ARET4
15
1μ
1μ
1μ
LIN2
ARET2
RIN2
AGND
5
6
7
8
9
1μ
1μ
1μ
22μ
1μ
1μ
10
11
12
1μ
1μ
1μ
LIN4
AVcc
ABIAS
4
RIN3
RIN1
3
ARET3
ARET1
2
1
LIN3
LIN1
VGND2
1μ
1μ
14
1μ
13
1μ
22μ
0.1μ
*4
*3. When video isolator is off
(Not only 39-40 pin, but also 41-52 pin)
*2. When adjusting gain by external resistors.
(Not only 32-33 pin, but also 34-35pin)
*1. 75 ohm Driver connection
At CLAMP mode: Connect directly
At BIAS mode: Connect via coupling capacitor
(Not only 27-28 pin, but also 29-30 pin)
2
75
C1: 0.1μF (at CLAMP)
1.0μF (at BIAS)
R1:2.2kΩ
75
+
+
C2:15pF
*1
27
3
1μ
open
4
+
1μ
1μ
open
R2:2.2kΩ
40
28
*4. When audio isolator is off
(Not only 6-8 pin, but also 10-12, 14-16, 18-20 pin)
33
32
*3
[About the value of these components]
○Adjusting gain by R2(0 to 2.2kΩ)
○Adjusting C2 refer to the value of R 2.
39
*4
*2
Fig.4
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© 2011 ROHM Co., Ltd. All rights reserved.
8/12
2011.04 - Rev.A
© 2011 ROHM Co., Ltd. All rights reserved.
www.rohm.com
9/12
2011.04 - Rev.A
Fig.5
CN_8
1.2K
R_8A
1.2K
R_8B
CN_6
1.2K
R_6A
1.2K
R_6B
RSCL
1K
RSDA
1K
C_13B
0.1μ
C_13A
2.2μ
1.2K
R_10B
1.2K
R_12B
1.2K
R_10A
1.2K
R_12A
CN_10
CN_12
1.2K
R_2B
1.2K
R_4B
1.2K
R_2A
1.2K
R_4A
CN_2
CN_4
R_52A
VGND
0
R14
1.2K
R_15A
CN15_B
1.2K
R_15B
0
CN_ 15A R15
0
R16
VREG
H
0
14 LIN4
18 LIN5
0
R18
CN_ 15A
Bias
iso
Bias
iso
Bias
iso
LPF
75
VGND
VGND
VGND
75
VGND
CN48_A
VIN5 47 R47
LPF/
Through
10kΩ
Amp.
LPF/
Through
10kΩ
Amp.
Bias
Clamp
8
7
6
5
4
3
2
1
0
75
VGND
VGND
CN46_A
VIN4 45 R45
R_44A
VGND
75
0
VGND
VGND
VRET3 44 R44
CN44_A
0
iso
8
7
6
5
4
3
2
1
VGND
R_46A
VRET4
0
VRET4 46 R46
10kΩ
Amp.
75Ω
Driver
LOUT2
VGND
VGND
R_50A
VRET6
VRET6 50 R50
VGND
0
iso
0
10kΩ
Amp.
20 RIN5
26
CN52_A
VIN7 51 R51
0
2
CN50_A
R_48A
VIN6 49 R49
VRET5 48 R48
2
Bias
CN19_B
Bias
iso
0
ADR
19 ARET5
0
R19
0
R20
Bias
iso
LPF
10kΩ
Amp.
LOUT1
ROUT1
0
CR_24 24
0
Bias
Clamp
0
VVCC
75
VRET7 52 R52
0
15 ARET4
16 RIN4
17
VGND
L
SW_ADR
1.2K
R_19A
1.2K
R_19B
10kΩ
Amp.
21 VBIAS
10K
CR_22 22
R22
LOUT1
10K
0
CR_23 23
R23
ROUT1
10K
R24
LOUT2
10K
75Ω
Driver
CR_25 25 ROUT2
R25
ROUT2
VVCC
Bias
VIN3 43 R43
Bias
VGND
R_42A
VRET2
0
VRET2
42 R42
0
iso
75
VGND
VGND
CN42_A
VIN2 41 R41
VGND
R_40A
VGND
0
iso
Bias
75
VRET1 40 R40
VGND
CN40_A
VGND
100
R39
CN_32A
CN_33B
JAVCC
AVCC
CN_34A
CN_35B
VVCC
JVVCC
GND
AGND
AGND
VGND
AGND
VGND
VGND
VGND
VGND
AGND
AGND
AGND
VGND
●Evaluation board circuit diagram
Technical Note
BH7649KS2
BH7649KS2
Technical Note
●Evaluation board PCB layer
Fig.6
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© 2011 ROHM Co., Ltd. All rights reserved.
10/12
2011.04 - Rev.A
BH7649KS2
Technical Note
●Notes for use
(1) Absolute maximum ratings
If the absolute maximum ratings for applied voltage and/or operation temperature are exceeded, LSI damage may
result. Therefore, do not apply voltage or use in a temperature that exceeds these absolute maximum ratings. If it is
possible that absolute maximum ratings will be exceeded, use a physical safety device such as a fuse and make sure
that no conditions that might exceed the absolute maximum ratings will be applied to the LSI IC.
(2) GND potential
Regardless of the operation mode, the voltage of the GND pin should be at least the minimum voltage. Actually check
whether or not the voltage at each pin, including transient phenomena, is less than the
GND pin voltage.
(3) Thermal design
The thermal design should be done using an ample margin that takes into consideration the allowable dissipation
under actual use conditions. Perform thermal design in which there are adequate margins by taking into account the
allowable power dissipation in actual states of use.
(4) Shorts between pins and mounting errors
When mounting LSI ICs onto the circuit board, make sure each LSI’s orientation and position is correct. The ICs may
become damaged if they are not mounted correctly when the power is turned on. Similarly, damage may also result if a
short occurs, such as when a foreign object is positioned between pins in an IC, or between a pin and power supply or
GND connection.
(5) Operation in strong electromagnetic field
When used within a strong electromagnetic field, evaluate carefully to avoid the risk of operation faults.
(6) When not using a sag compensation circuit
Connect the sag compensation pin and output pin as closely as possible. There is a danger of high frequency
oscillation. Also make the distance from the output pin (OUT pin, SAG pin) to the 75Ω resistance as short as possible.
(7) When using a sag compensation circuit
Make the length of the output pin (OUT pin, SAG pin) and capacitor as short as possible. There is a danger of high
frequency oscillation. Also make the distance from the output pin (OUT pin, SAG pin) to the 75Ω resistance as short
as possible. If these cautions is not observed in board layout, connect a capacitor (0.01µF~0.1µF) as short as
possible
(8) VGND1(31pin), VGND2(1pin) and AGND(9pin) connection
When to float any one of GND pins(VGND1, VGND2 and AGND) during operation, the internal ESD protection diode
Between VGND1, VGND2 and AGND may be damaged by large current surge. If the abnormal design like floating any
one of GND pins is required, it is advisable to connect external diodes between GND pins. The connection detail of
external diodes is illustrated in Fig.7.
AGND
9pin
*
VGND1
VGND2
*
BH7649KS2
31pin
1pin
* :1SR154-400(ROHM) etc.
Fig.7 External diodes
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© 2011 ROHM Co., Ltd. All rights reserved.
11/13
2011.04 - Rev.A
BH7649KS2
Technical Note
●Ordering part number
B
D
7
Part No.
6
4
9
K
Part No.
S
2
Package
KS2 : SQFP-T52
Packaging and forming specification
None: Tray
SQFP-T52
<Tape and Reel information>
12.0±0.3
10.0±0.2
39
27
1000pcs
10.0 ± 0.2
14
52
0.5
12.0 ± 0.3
Tray (with dry pack)
Quantity
Direction of feed Direction of product is fixed in a tray
26
40
Container
1pin
13
1
1.4 ± 0.1
0.1 ± 0.1
0.125±0.1
0.15
0.65
0.3±0.1
∗ Order quantity needs to be multiple of the minimum quantity.
(Unit : mm)
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© 2011 ROHM Co., Ltd. All rights reserved.
12/12
2011.04 - 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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obtain a license or permit under the Law.
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More detail product informations and catalogs are available, please contact us.
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http://www.rohm.com/contact/
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© 2011 ROHM Co., Ltd. All rights reserved.
R1120A