Video Accessory ICs
NTSC / PAL
Analog Video Encoders
BH7236AF,BH7240AKV
No.10069EAT06
●Description
BH7236AF and BH7240AKV are NTSC/PAL analog video encoders which convert R, G, and B component signals to 6 types
video signal format for NTSC and PAL: Composite video output, luminance output, chrominance output and R, G, and B
output. The encoders eliminate the need for complicated register settings and require only few external parts.
●Features
1) BH7236AF –RGB analog input. BH7240AKV: RGB 8bit digital input
2) 6 outputs support (V, Y, C, R, G, B, however BH7236AF also supports sync output)
3) NTSC/PAL support
4) 5.0V single power supply
5) Logic input 3.0V to 5.0V
6) Subcarrier input (corresponded to sine-wave and pulse-wave)
7) Built-in 75Ω driver
8) High-speed DAC (only BH7240AKV)
9) Few external parts
10) LC filter for reducing cross-color (with external parts)
11) Unnecessary Initialization
12) Package (SOP24 :BH7236AF :VQFP48C :BH7240AKV)
●Applications
Video Games, Television Display Terminals, etc.
●Line up matrix
Parameter
Input format
Output format
Input DAC(only BH7240AKV)
Package
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
BH7236AF
BH7240AKV
R,G,B analog
7output
VOUT
: composite video output
YOUT
: luminance signal output
COUT
: color signal output
ROUT
: Red signal output
GOUT
: Green signal output
BOUT
: Blue signal output
SYNCOUT: composite sync output
VOUT
YOUT
COUT
ROUT
GOUT
BOUT
R,G,B digital
(Parallel 8bit×3)
6 output
:composite video output
:luminance signal output
:color signal output
:Red signal output
:Green signal output
:Blue signal output
-
Built-in(8bit×3)
SOP24
VQFP48C
1/17
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
●Absolute maximum ratings
Parameter
Supply voltage
Symbol
Ratings
Unit
VCC
7
V
BH7236AF
Power dissipation
550
※1
900
※2
Pd
mW
BH7240AKV
Storage temperature range
Tstg
-55 ～ +125
℃
※1 Reduce by 5.5mW/C over 25C (A measured value at mounting on 50×50×1.6mm glass epoxy substrate.)
※2 Reduce by 9.0mW/C over 25C (A measured value at mounting on 50×50×1.6mm glass epoxy substrate.)
●Recommended operation ratings
Symbol
Ratings
Unit
Supply voltage
VCC
4.5 ～ 5.5
V
Operation temperature range
Topr
-20 ～ +70
℃
Input High level (SYNCIN, NT/PAL)
VIH
2.2 ～ 5.0
※1
V
Input Low level(SYNCIN,NT/PAL)
VIL
0.0 ～ 0.8
※1
V
Input level (SCIN)
Vsci
0.4 ～ 5.0
Vpp
Vrgbi
0 ～ 1.0
Vpp
VIH2
2.2 ～ 5.0
※1
V
VIL2
0 ～ 0.8
※1
V
Parameter
[BH7236AF]
Input level(R,G,B)
[BH7240AKV]
Input High level
(VCLK,RDATA,GDATA,BDATA)
Input Low level
(VCLK,RDATA,GDATA,BDATA)
※1 BH7236AF: VCC1=VCC2=5.0V BH7240AKV: DVDD=AVCC1=AVCC2=5.0V
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© 2010 ROHM Co., Ltd. All rights reserved.
2/17
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
●Electrical characteristics
◎BH7236AF(Ta=25℃, VCC1=VCC2=5.0V unless otherwise noted.)
Limits
Parameter
Symbol
Min.
Typ.
Consumption current
Max.
Unit
Condition
Icc
-
42
55
mA
RIN=GIN=BIN=0.0Vpp input
Vlwhite
0.63
0.70
0.77
Vpp
RIN=GIN=BIN=1.0Vpp input
Vlred
0.19
0.21
0.23
Vpp
RIN= 1.0Vpp input
Vlgreen
0.37
0.41
0.45
Vpp
GIN= 1.0Vpp input
Blue level
Vlblue
0.07
0.08
0.09
Vpp
BIN= 1.0Vpp input
Sync level
Vsync
0.27
0.30
0.33
Vpp
Sync/White level ratio
Rs/w
0.38
0.43
0.48
Red/Burst level ratio
Vcr/Vbur
2.84
3.16
3.48
-
RIN= 1.0Vpp input
※1
Green/Burst level ratio
Vcg/Vbur
2.65
2.95
3.25
-
GIN= 1.0Vpp input
※1
Blue/Burst level ratio
Vcb/Vbur
2.01
2.24
2.47
-
BIN= 1.0Vpp input
※1
Burst level
Vbur
0.23
0.29
0.35
Vpp
Red phase
θred
94
104
114
deg
RIN= 1.0Vpp input
※1
θgreen
231
241
251
deg
GIN= 1.0Vpp input
※1
θblue
337
347
357
deg
BIN= 1.0Vpp input
※1
θbur+
125
135
145
deg
θbur-
215
225
235
deg
Rbur
0.9
1.0
1.1
-
Vcl
-
-
35
mVpp
Red level
Vro
0.63
0.70
0.77
Vpp
RIN= 1.0Vpp input
Green level
Vgo
0.63
0.70
0.77
Vpp
GIN= 1.0Vpp input
Blue level
Vbo
0.63
0.70
0.77
Vpp
BIN= 1.0Vpp input
SYNCOUT High level
Vhsync
3.90
-
-
V
SYNCOUT Low level
Vlsync
-
-
0.80
V
YOUT
Vyo
1.30
1.70
2.10
V
COUT
Vco
2.00
2.40
2.80
V
VOUT
Vvo
1.15
1.55
1.95
V
ROUT
Vro
1.40
1.80
2.20
V
GOUT
Vgo
1.40
1.80
2.20
V
BOUT
Vbo
1.40
1.80
2.20
V
Luminance level (Vout,Yout)
White level
Red level
Green level
Rs/w = Vsync/Vlwhite
Chroma level (Vout,Cout)
Green phase
Blue phase
PAL burst phase
PAL burst level ratio
Carrier leak
※2
Color subcarrier
※1
=4.433619MHz (NT/PAL = L)
Level ratio per line
※2
RGB level (Rout,Gout,Bout)
Output DC voltage
※1 This specification is design target.
※2 This specification is measured with 3.58MHz BPF.
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© 2010 ROHM Co., Ltd. All rights reserved.
3/17
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
◎BH7240AKV(Ta=25℃, DVDD=AVCC1=AVCC2=5.0V unless otherwise noted.)
Limits
Parameter
Symbol
Unit
Min.
Typ.
Max.
Consumption current
Condition
Icc
-
85
105
mA
RGB DATA=00h input
Vlwhite
0.59
0.70
0.81
Vpp
RGB DATA=FFh input
Vlred
0.18
0.21
0.24
Vpp
R DATA=FFh input
Vlgreen
0.35
0.41
0.47
Vpp
G DATA=FFh input
Blue level
Vlblue
0.07
0.08
0.09
Vpp
B DATA=FFh input
Sync level
Vsync
0.27
0.30
0.33
Vpp
Sync/White level ratio
Rs/w
0.37
0.43
0.49
Red/Burst level ratio
Vcr/Vbur
2.69
3.16
3.63
-
R DATA=FFh input
※1
Green/Burst level ratio
Vcg/Vbur
2.51
2.95
3.39
-
G DATA=FFh input
※1
Blue/Burst level ratio
Vcb/Vbur
1.91
2.24
2.57
-
B DATA=FFh input
※1
Burst level
Vbur
0.25
0.29
0.33
Vpp
Red phase
θred
94
104
114
deg
R DATA=FFh input
※1
θgreen
231
241
251
deg
G DATA=FFh input
※1
θblue
337
347
357
deg
B DATA=FFh input
※1
Red level
Vrout
0.56
0.70
0.81
Vpp
R DATA=FFh input
Green level
Vgout
0.59
0.70
0.81
Vpp
G DATA=FFh input
Blue level
Vbout
0.59
0.70
0.81
Vpp
B DATA=FFh input
Fda
-
-
20
MHz
Tset
20
-
-
nsec
Thold
20
-
-
nsec
IH
-
-
300
µA
Terminal is applied to 5V.
IL
-200
-
-
µA
Terminal is applied to 0V.
Luminance level (Vout,Yout)
White level
Red level
Green level
Chroma level (Vout,Cout)
Green phase
Blue phase
※2
RGB level (Rout,Gout,Bout)
Others
RGB DATA
conversion frequency
RGB DATA
Set-up time
RGB DATA
Hold-time
SYNCIN, NT/PAL
Input current at High
SYNCIN, NT/PAL
Input current at Low
※1 This specification is design target.
※2 This specification is measured with 3.58MHz BPF.
Notes:
1) Please use these semiconductor devices within the guaranteed temperature range. ROHM guarantees -20 to 70℃
2) The accuracy of subcarrier signal is important and is specified as 2.8ppm, per the television standard.
It is recommended to use a crystal oscillator as the subcarrier input. Since the margin of accuracy is not guaranteed
for all televisions (can be up to 100ppm).
3) The unused RGB CMOS data input of the BU7240AKV must be terminated to "high" or "low" level.
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© 2010 ROHM Co., Ltd. All rights reserved.
4/17
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
●Block diagram, Application circuit, Pin arrangement
(BH7236AF)
24
1
GND1
RIN
2
CLAMP
75Ω
GND2
75Ω
23
ROUT
220µF
0.1µF
GIN
SYNC
SYNC
3
75Ω
CLAMP
75Ω
22
GOUT
220µF
0.1µF
BIN
SYNC
4
75Ω
CLAMP
75Ω
21
BOUT
220µF
PHASE
SHIFTER
75Ω
19
18
SYNC
MIX
9
C
L
27pF 68µH
22pF 68µH
BFP GEN.
75Ω
N.C.
YTRAP
C [pF] L [µH]
BFP
N.C.
NTSC
PAL
17
8
BFPOUT
VCC2
0.1µF
GND2
DELAY
GND1
VOUT
220µF
VCC2
Y/C MIX
BFP
F ・F
7
NT/PAL
75Ω
20
BFP
B-Y MOD.
6
VCC1
B-Y MOD.
SCIN
FILTER
5
N.C.
MATRIX
SYNC
0.1µF
GND1
75Ω
16
YOUT
220µF
SYNCIN
10
75Ω
SYN
75Ω
15
COUT
0.47µF
SYNCOUT
11
14
N.C.
12
13
N.C.
VCC1
VCC1
0.1µF
GND1
Fig. 1 BH7236AF Block Diagram
Terminal
number
1
2
Terminal
name
GND1
RIN
3
GIN
4
5
BIN
N.C.
6
SCIN
7
NT/PAL
8
BFPOUT
9
N.C.
10
SYNCIN
11
12
13
14
15
16
17
18
19
20
21
22
23
24
SYNCOUT
VCC1
N.C.
N.C.
COUT
YOUT
YTRAP
N.C.
VCC2
VOUT
BOUT
GOUT
ROUT
GND2
Description of terminals
Ground terminal. (For all circuits except 75Ω driver)
Analog Red signal input terminal. This signal should be driven at sufficiently low impedance.
Analog Green signal input terminal. This signal should be driven at sufficiently low
impedance.
Analog Blue signal input terminal. This signal should be driven at sufficiently low impedance.
No Connection. (Not connected internally)
Color subcarrier input terminal.
Input the sine-wave or pulse-wave (duty 50%) according to a required output format
(3.579545MHz for NTSC, 4.433619MHz for PAL). Moreover, this input must not exceed more
than power supply level and less than ground level.
Input terminal for the selection of TV output format. Connect “high” for NTSC and “low” for
PAL. The internal pull-up register 50kΩis connected NT/PAL to VCC.
Burst timing signal output terminal. The burst timing signal is generated inside the device by
inputting a color subcarrier and a composite sync.
No Connection. (not connected internally)
Composite sync input terminal. Composite sync is output to YOUT and VOUT at the timing
when SYNCIN is set to “low”. Moreover, RGB input signals are dc-clamped internally at this
timing. The internal pull-up register 100kΩ is connected to VCC.
Composite sync output terminal.
Power supply terminal. (for all circuits except 75Ω driver)
No Connection. (not connected internally)
No Connection. (not connected internally)
Chroma signal output terminal. Built-in 75Ω driver.
Luminance signal output terminal. Built-in 75Ω driver.
Luminance trap terminal. The output impedance is about 2kΩ.
No Connection. (Not connected internally)
Power supply terminal. (for 75Ω driver)
Composite video output terminal. Built-in 75Ω driver.
Analog B signal output terminal. Built-in 75Ω driver.
Analog G signal output terminal. Built-in 75Ω driver.
Analog R signal output terminal. Built-in 75Ω driver.
Ground terminal (for 75Ω driver)
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© 2010 ROHM Co., Ltd. All rights reserved.
5/17
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
BDATA3
37
BDATA2
38
BDATA1
39
BDATA0
40
VCLK
41
BDATA4
BDATA5
BDATA6
BDATA7
GDATA0
GDATA1
GDATA2
GDATA3
GDATA4
GDATA5
GDATA6
GDATA7
(BH7240AKV)
36
35
34
33
32
31
30
29
28
27
26
25
24
8
DECODER
8
LATCH
CLK
DECODER
LATCH
CLK
CELL
MATRIX
VREF
CLK
CELL
MATRIX
CLAMP
CLAMP
RDATA0
23
RDATA1
LATCH
22
RDATA2
CELL
MATRIX
21
DECODER
8
RDATA3
0.1µF
20
DVDD
CLAMP
DGND
42
19
RDATA4
VREFOUT
43
18
RDATA5
17
RDATA6
16
RDATA7
YTRAP
15
SCIN
Y/C MIX
14
0.1µF
N.C.
44
AGND1
45
RCLAMP
0.1µF
0.1µF
AVCC1
MATRIX
R
R-Y
G
CHROMA
GEN
B
46
Burst Flag
GEN
B-Y
SYNC
ADD
SYNC
LPF
47
6db
6db
6db
6db
48
75
75
75
75
75
75
3
4
5
6
7
8
BPF
13
9
10
0.1μF
11
12
SYNCIN
NT/PAL
DGND
L [µH]
C [pF]
VCC
NTSC
PAL
C
L
27pF 68µH
22pF 68µH
N.C.
N.C.
YTRAP
AGND1
AVCC2
75Ω
220µF
VOUT
COUT
YOUT
0.047µF
75Ω
75Ω
220µF
75Ω
220µF
220µF
ROUT
AGND2
BCLAMP
BOUT
2
220µF
1
75Ω
0.1µF
GOUT
0.1µF
75Ω
DVDD
GCLAMP
Fig. 2 BH7240AKV Block Diagram
Terminal
number
Terminal
name
1
BCLAMP
Analog Blue signal clamp terminal.
2
AGND2
Ground terminal. (For 75Ω driver)
Description of terminals
3
ROUT
Analog Red signal output terminal. Built-in 75Ω driver.
4
GOUT
Analog Green signal output terminal. Built-in 75Ω driver.
5
BOUT
Analog Blue signal output terminal. Built-in 75Ω driver.
6
YOUT
Luminance signal output terminal. Built-in 75Ω driver.
7
COUT
Chrominance signal output terminal. Built-in 75Ω driver.
8
VOUT
Composite video signal output terminal. Built-in 75Ω driver.
9
AVCC2
10
YTRAP
11
N.C.
Power supply terminal. (For 75Ω driver)
Luminance trap filter terminal. By connecting it, the chrominance component contained in a
luminance signal is eliminated, and cross-color gets reduced. Output impedance is about 2k
Ω.It’s effective for only the composite video output.
No Connection. (Not connected internally)
12
N.C.
13
NT/PAL
14
SYNCIN
15
SCIN
No Connection. (Not connected internally)
Input terminal for the selection of TV output format. Connect to NT/PAL, “high” for NTSC and
“low” for PAL.
Composite sync input terminal. Composite sync is output to YOUT and VOUT at the timing
when SYNCIN is set to “low”. Moreover, RGB input signals are dc-clamped internally at this
timing.
Color subcarrier input terminal.
Input the sine-wave or pulse-wave (duty 50%) according to a required output format
(3.579545MHz for NTSC, 4.433619MHz for PAL). Moreover, this input must not exceed
more than power supply level and less than ground level.
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© 2010 ROHM Co., Ltd. All rights reserved.
6/17
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
Terminal
number
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Terminal
name
RDATA7
RDATA6
RDATA5
RDATA4
DVDD
RDATA3
RDATA2
RDATA1
RDATA0
GDATA7
GDATA6
GDATA5
GDATA4
GDATA3
GDATA2
GDATA1
GDATA0
BDATA7
BDATA6
BDATA5
BDATA4
BDATA3
BDATA2
BDATA1
BDATA0
VCLK
DGND
Description of terminals
Red data input terminal
(bit 7)
Red data input terminal
(bit 6)
Red data input terminal
(bit 5)
Red data input terminal
(bit 4)
The power supply terminal for digital circuits.
Red data input terminal
(bit 3)
Red data input terminal
(bit 2)
Red data input terminal
(bit 1)
Red data input terminal
(bit 0)
Green data input terminal (bit 7)
Green data input terminal (bit 6)
Green data input terminal (bit 5)
Green data input terminal (bit 4)
Green data input terminal (bit 3)
Green data input terminal (bit 2)
Green data input terminal (bit 1)
Green data input terminal (bit 0)
Blue data input terminal
(bit 7)
Blue data input terminal
(bit 6)
Blue data input terminal
(bit 5)
Blue data input terminal
(bit 4)
Blue data input terminal
(bit 3)
Blue data input terminal
(bit 2)
Blue data input terminal
(bit 1)
Blue data input terminal
(bit 0)
DAC clock input. By rising edge of this clock, RGB data are taken in inside the device.
Ground terminal. (For digital circuits)
RGBDAC reference voltage output terminal. Connect VREFOUT to GND through 0.1µF
VREFOUT
capacitor.
N.C.
No Connection. (Not connected internally)
AGND1
GND terminal (For analog circuit except 75Ω driver).
RCLAMP Analog Red signal clamp terminal.
AVCC1
The power supply terminal (For analog circuit except 75Ω driver).
GCLAMP Analog Green signal clamp terminal.
●Operation explanation for each block
・Clamp-Circuit (CLAMP)
This circuit sets the black (pedestal) level for the RGB signals eliminated DC level during the sync period (external sync is
the low level). When the external sync is at the low level, the R, G, B data should not be input, since the dc input level is
clamped at this timing. (BH7240AKV:00h, BH7236AF:0Vpp)
・RGB Matrix Circuit (MATRIX)
This circuit converts R, G and B signals to Y, R-Y and B-Y for color television.
・Balanced Modulation Circuit(BH7236AF:R-YMOD,G-YMOD BH7240AKV:CHROMAGEN)
Modulator circuit that modulates color-difference-signal (generated in RGB MATRIX) by 2 types of subcarrier that are 90
degrees different phase. The chrominance signal is generated by mixing these modulated signals.
・Mixed Circuit (YCMIX)
This circuit generates the composite video signal by combining the luminance (in the RGB MATRIX circuit) and the
chrominance (in the balanced modulation circuit).
・TRAP Filter (external)
This filter eliminates the chrominance frequency component contained in luminance by connecting L (coil) and C
(capacitor) to YTRAP terminal in series. Output impedance is about 2kΩ. This filter is effective only in a composite output
(Vout), and does not influence luminance output (Yout). Refer to the "Application part selection method" regarding to the
selection of L and C.
・75Ω Driver
Driver which can drive 75Ω load directly. The 75Ω driver outputs the regular level based on the video standard, when 75Ω
is connected as load. If 75Ω is not connected as load, users may no longer take the accurate image, since the video signal
output level is changed to a different one. Moreover, it is prohibited to use less than 75Ω.
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© 2010 ROHM Co., Ltd. All rights reserved.
7/17
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
●I/O Equivalent circuit
◎BH7236AF Input/Output Equivalent Circuit
Terminal Terminal
Number Name
2
3
4
RIN
GIN
BIN
Equivalent Circuit
100k
30
10
7
1k
6
Terminal Terminal
Number Name
Equivalent Circuit
SYNCIN
NT/PAL
20k
1k
30
SCIN
17
25k
2k
YTRAP
20k
23
22
21
20
16
15
ROUT
GOUT
BOUT
VOUT
YVOUT
COUT
11
SYNC
OUT
30
20k
20k
8
BFP
OUT
100µA
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© 2010 ROHM Co., Ltd. All rights reserved.
50µA
8/17
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
◎BH7240AKV
Input/Output Equivalent Circuit
Terminal Terminal
Number Name
16-19
21-24
RDATA
[7:0]
25-32
GDATA
[7:0]
33-40
BDATA
[7:0]
Equivalent Circuit
50
Terminal Terminal
Number Name
46
Red
CLAMP
48
Green
CLAMP
1
Blue
CLAMP
5k
Equivalent Circuit
30
50k(13pin)
100k(14pin)
1k
15
13
14
SCIN
30
10
20k
NT/PAL
SYNCIN
25k
1k
30
2k
YTRAP
43
3.2k
VREF
OUT
4.8k
3
4
5
6
7
8
ROUT
GOUT
BOUT
YOUT
COUT
VOUT
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© 2010 ROHM Co., Ltd. All rights reserved.
9/17
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
I/O Characteristics (Only BH7236AF
1.60
1.00
0.30
1.40
0.25
1.20
0.80
0.60
0.40
Vrin=Vgin=Vbin=0.0~2.0Vpp
SYNCIN=1.0Vpp
SCIN=3.58MHz,0.3Vpp
0.20
0.20
0.15
Vrin=Vgin=Vbin=1.0Vpp
SYNCIN=0.0~2.0Vpp
SCIN=3.58MHz,0.3Vpp
0.10
0.05
0.5
1.0
1.5
2.0
1.00
0.80
0.60
0.00
0.0
RGB IN: Vrgb [Vpp]
0.5
1.0
1.5
2.0
0.0
Fig.4 Yout (Sync) Characteristic
1.20
0.30
0.15
Vrin=Vgin=Vbin=0.0Vpp
SYNCIN=1.0Vpp
1.00
0.80
0.60
0.40
Vrin=Vgin=Vbin=0.0~2.0Vpp
SYNCIN=1.0Vpp
SCIN=3.58MHz,0.3Vpp
0.20
SCIN=3.58MHz,0.0~2.0Vpp
0.00
Composite Level: Vl_sync [V]
0.30
Composite Level: VL_white [V]
0.35
0.20
0.5
1
1.5
2
0.20
0.15
0.10
0.5
1
1.5
2
0
RGB IN : Vrgb [Vpp]
SCIN : Vscin [Vpp]
1.20
1.20
1.20
0.60
Vrin=0.0~2.0Vpp
Vgin=Vbin=0.0Vpp
SYNCIN=1.0Vpp
SCIN=3.58MHz,0.3Vpp
0.20
1.00
0.80
0.60
Vgin=0.0~2.0Vpp
Vrin=Vbin=0.0Vpp
SYNCIN=1.0Vpp
SCIN=3.58MHz,0.3Vpp
0.40
0.20
0.00
Composite Level: VL_white [V]
1.40
Composite Level: Vcg [V]
1.40
0.80
0.5
1
1.5
2
RIN : Vrin [Vpp]
2
0.80
0.60
0.40
Vrin=Vgin=Vbin=0.0~2.0Vpp
SYNCIN=1.0Vpp
SCIN=3.58MHz,0.3Vpp
0.00
0
0.5
1
1.5
GIN : Vgin [Vpp]
Fig.10 Vout Chroma (Green)
Characteristic
Fig.9 Vout Chroma (Red)
Characteristic
1.5
1.00
0.20
0.00
0
1
Fig.8 Vout Luminance (Sync)
Characteristic
Fig.7 Vout Luminance (White)
Characteristic
1.00
0.5
SYNCIN : Vsync [Vpp]
1.40
0.40
Vrin=Vgin=Vbin=1.0Vpp
SYNCIN=0.0~2.0Vpp
SCIN=3.58MHz,0.3Vpp
0.00
0
Fig.6 Cout (Burst)
Characteristic
2.0
0.25
0.05
0.00
0
1.5
Fig.5 Cout (Red) Characteristic
1.40
0.25
1.0
R IN: Vrin [Vpp]
0.35
0.05
0.5
Sync IN: Vsync [Vpp]
Fig.3 Yout (White) Characteristic
0.10
Vrin=0.0~2.0Vpp
Vgin=Vbin=0.0Vpp
SYNCIN=1.0Vpp
SCIN=3.58MHz,0.3Vpp
0.40
0.20
0.00
0.0
Chroma Level: Vcburst [V]
Chroma Level: Vcr [V]
0.35
0.00
Composite Level: Vcr [V]
Condition:VCC1=VCC2=5.0V)
1.20
Luminance Level: Vl_sync [V]
Luminance Level: Vlwhite [V]
●Reference data
2
0
0.5
1
1.5
2
RGB IN : Vrgb [Vpp]
Fig.11 Vout Chroma (Blue)
Characteristic
1.20
Bout, Gout
RGB Level: Vrgb [V]
1.00
Rout
0.80
0.60
Vrin=0.0~2.0Vpp
Vgin=0.0~2.0Vpp
Vbin＝0.0～2.0Vpp
SYNCIN=1.0Vpp
SCIN=3.58MHz,0.3Vpp
0.40
0.20
0.00
0
0.5
1
1.5
2
RIN,GIN,BIN : Vrin Vgin Vbin [Vpp]
Fig.12 RGBout Characteristic
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© 2010 ROHM Co., Ltd. All rights reserved.
10/17
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
●Reference data
Temperature Characteristics (BH7236AF, BH7240AKV)
0.80
Yout
Luminance Level:Vlr [V]
Vout
0.60
0.50
0.40
0.30
0.20
VCC=5.0V
NTPAL=NTSC
SCIN=3.58MHz
0.10
0.00
0.20
Vout
0.15
0.10
VCC=5.0V
NTPAL=NTSC
SCIN=3.58MHz
0.05
0
20
40
60
80
100
-20
Temperature: Ta[℃]
Luminance Level:Vlsync [V]
Luminance Level:Vlb [V]
20
40
60
80
0.04
0.03
VCC=5.0V
NTPAL=NTSC
SCIN=3.58MHz
0
20
40
60
-20
80
0
20
40
Cout
0.20
0.15
0.10
VCC=5.0V
NTPAL=NTSC
SCIN=3.58MHz
Vout
2.50
2.00
1.50
1.00
VCC=5.0V
NTPAL=NTSC
SCIN=3.58MHz
0.50
0.00
-20
0
20
40
60
80
100
-40
-20
Fig.16 Luminance (Blue)
Characteristics
0
20
40
3.00
0.30
2.00
1.50
1.00
VCC=5.0V
NTPAL=NTSC
SCIN=3.58MHz
0.50
0.00
2.50
Cout
2.00
1.50
1.00
VCC=5.0V
NTPAL=NTSC
SCIN=3.58MHz
0.50
0.00
-40
-20
0
20
40
60
80
100
Temperature: Ta[℃]
Fig.19 Chroma (Green/Burst)
Characteristics
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© 2010 ROHM Co., Ltd. All rights reserved.
100
Vout
0.25
Vout
Chroma Level:Vcburst [V]
Chroma Level:Vcb/Vcburst
Chroma Level:Vcr/Vcburst
Vout
80
Fig.18 Chroma (Red/Burst)
Characteristics
Fig.17 Luminance (Sync)
Characteristics
Cout
2.50
60
Temperature: Ta[℃]
Temperature: Ta[℃]
3.00
100
Fig.15 Luminance (Green)
Characteristics
Vout
0.25
Temperature: Ta[℃]
3.50
80
3.00
-40
100
60
Temperature: Ta[℃]
0.00
-20
-40
3.50
0.05
0.00
-40
VCC=5.0V
NPAL=NTSC
SCIN=3.58MHz
0.10
100
0.30
0.05
0.01
0.15
Yout
0.06
0.02
0
0.35
Yout
0.07
0.20
Fig.14 Luminance (Red)
Characteristics
Vout
0.08
0.25
Temperature: Ta[℃]
Fig.13 Luminance (White)
Characteristics
0.09
0.30
0.00
-40
Chroma Level:Vcr/Vcburst
-20
Vout
0.35
0.05
0.00
-40
Yout
0.40
Luminance Level:Vlg [V]
0.70
Luminance Level:Vlwhite [V]
0.45
0.25
Yout
Cout
0.20
0.15
0.10
VCC=5.0V
NTPAL=NTSC
SCIN=3.58MHz
0.05
0.00
-40
-20
0
20
40
60
80
100
Temperature: Ta[℃]
Fig.20 Chroma (Blue/Burst)
Characteristics
11/17
-40
-20
0
20
40
60
80
100
Temperature: Ta[℃]
Fig.21 Chroma (Burst)
Characteristics
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
●Reference data
Output Characteristics (BH7236AF, BH7240AKV)
[Condition SCIN:High=2.0V,Low=1.0V SYNCIN:High=2.0V, Low=1.0V]
Vout
Vout
Yout
Rout
Gout
Cout
SYNCin
Bout
Fig.22 Vout, SYNCIN Waveform
Fig.23 Yout, Cout Waveform
Vout
Vout
SYNCin
SYNCin
Fig.25 Blanking Section (NTSC ODD)
Fig.26 Blanking Section (NTSC EVEN)
Vout
Vout
SYNCin
SYNCin
Fig.27 Blanking Section (PAL ODD)
Fig.28 Blanking Section (PAL EVEN)
Vout
Vout
Fig.29 Vout (C=22µF)
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© 2010 ROHM Co., Ltd. All rights reserved.
Fig.24 Vout,Rout,Gout,Bout Waveform
Vout
Fig.30 Vout (C=220µF)
12/17
Fig.31 Vout (C=1000µF)
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
●Timing chart
・DAC, R, G, B Input Timing (only BH7240AKV)
Clock should be input at VCLK terminal (41 pins) ay the system clock of DAC.
At the rising edge of this clock, RGB DATA is taken from inside the device.
VCLK
RGB DATA
0
1
2
3
4
5
Setup Hold
Inside Register
0
1
2
3
4
5
Fig.32 Input Timing of RGB, VCLK
・Data Input Timing, Composite, Sync Input Timing
Since BH7236AF and BH7240AKV do not have the mask function of data input, users do not input the data in the blanking
terminal (reference to Fig 33-36). Instead, input the composite sync of the television standards to the SYNCIN terminal.
The composite sync input needs to include the equalizing pulse in addition to H-Sync and V-Sync.
[In the case of NTSC]
Data Input Line: 20～262
R,G,B DATA
524
525
1
2
3
4
5
6
7
8
9
10
19
20
21
524
525
1
2
3
4
5
6
7
8
9
10
19
20
21
19
20
21
SYNCIN
Vertical sync
Equalizing pulse
VOUT
524
525
1
2
3
4
5
Field 1
Equalizing pulse
6
7
8
9
10
Data Input Line: 283～525
R,G,B DATA
262
263
264
265
266
267
268
269
270
271
272
273
282
283
284
262
263
264
265
266
267
268
269
270
271
272
273
282
283
284
273
282
283
284
SYNCIN
Equalizing pulse
VOUT
262
263
264
265
Vertical sync
266
267 268
Field 2
Equalizing pulse
269
270
271
272
Fig.33 Data Input Range in the Field (NTSC)
SYNCIN
Data Start Point
Data End Point
RGBDATA
150nsec
150nsec
150nsec
75nsec
VOUT
50%
50%
Sync
Sync
Burst
Burst
Valid Data Range
9.20μ sec
52.9μ sec
1.5μ sec
1H 63.6μ sec (=1/15.734kHz)
Fig.34 Data Input Range in 1H Line (NTSC)
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© 2010 ROHM Co., Ltd. All rights reserved.
13/17
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
[In the case of PAL]
Data Input Line: 24～308
R,G,B DATA
621
622
623
624
625
1
2
3
4
5
6
7
23
24
621
622
623
624
625
1
2
3
4
5
6
7
23
24
6
7
23
24
SYNCIN
Equalizing pulse
Equalizing pulse
Vertical sync
VOUT
621
622
623
624
625
1
2
3
4
5
Field1
Data Input Line: 337～621
R,G,B DATA
309
310
311
312
313
314
315
316
317
318
319
320
336
337
309
310
311
312
313
314
315
316
317
318
319
320
336
337
319
320
336
337
SYNCIN
Equalizing pulse
Vertical sync
Equalizing pulse
VOUT
309
310
311
312
313
314
315
316
317
318
Field2
Fig.35 Data Input Range in the Field (PAL)
SYNCIN
Data Start Point
Data End Point
RGBDATA
150nsec
150nsec
150nsec
75nsec
VOUT
50%
50%
Sync
Sync
Burst
Burst
Valid Data Range
10.5μ sec
52.0μ sec
1.5μ sec
1H 64.0μ sec (=1/15.625kHz)
Fig.36 Data Input Range in 1H Line (PAL)
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© 2010 ROHM Co., Ltd. All rights reserved.
14/17
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
●Application part selection method
C3
4
1
3
21
3
20
C3
C1
5
0.1μF
6
29
28
27
26
GOUT
38
BDAT3
BDAT2
RDAT0
RDAT1
GND2
23
39
BDAT1
RDAT2
BOUT
R2
22
R1
GND2
40
BDAT0
41
VCLK
VOUT
R2
0.1μF
RDAT3
21
DVDD
20
42
DGND
3
2
VREFOUT
4
RDAT4
19
RDAT5
18
RDAT6
17
RDAT7
16
SCIN
15
18
C2
2
8
0.1μF
L1
17
44
YTRAP
GND1
45
C2
AGND1
L1
9
10
3
16
4
15
R1
C3
C4
11
YOUT
R2
R3
GND2
0.1μF
46
47
COUT
R1
R3
C3
C4
R2
R4
SYNCIN 14
AVCC1
0.1μF
48
R4
NT/PAL
VCC1
13
GND2
14
1
2
3
4
5
6
7
8
AGND2
12
24
GND2
19
43
7
25
GDAT7
30
R2
R1
C3
VCC2
31
GDAT6
3
GND2
22
C1
32
GDAT5
1
R2
R1
33
GDAT4
BIN
0.1μF
34
GDAT3
C3
3
35
ROUT
23
C1
36
37
GDAT2
GIN
R1
GDAT1
2
GDAT0
3
RIN
BDAT7
1
Guardring area
（ DGND）
24
BDAT6
GND2
BDAT5
GND1
BDAT4
1
3
13
9
3
3
3
4
3
Fig.38
11
12
2
YTRAP
ROUT GOUT BOUT YOUT COUT VOUT
Fig. 37 BH7236AF Recommended External Part
10
AVCC2
BH7240AKV Recommended External Part
BH7236AF
BH7240AKV
Terminal Number
Terminal Number
2
3
4
-
[Recommended Value by ROHM]
②: The method of selecting C2 and L1
1
C2 and L1 compose the Y trap filter.
3.71 [MHz]
[NTSC] f
The purpose is to eliminate the chrominance
2 LC
component contained in Y signal.
1
NTSC C2=27pF, L1=68µH
[PAL] f
4.11 [MHz]
2 LC
PAL
C2=22pF, L1=68µH
17
10
③: The method of selecting C3, R1, and R2
[Recommended Value by ROHM]
The purpose is to cut DC component contained C3=220 [µF], R1=75 [Ω], R2=75 [Ω]
in the (output of) Yout and Vout. Moreover, in
1
4.82 [MHz ]
order to prevent V sag as shown in Fig.29, f
2 CR
ROHM recommend the capacitor more than
220µF.
16
20
21
22
23
3
4
5
6
8
15
7
Design Method
①: The method of selecting C1
C1 is an input coupling capacitor.
Calculation Example
[Recommended Value by ROHM]
C1=0.1 [µF]
1
④: The method of selecting C4,R3,R4
f
22.6 [kHz ]
The output of chrominance needs to be output
2 CR
the signal of 3 - 4MHz frequency band, and [Recommended Value by ROHM]
0.047µF is recommended as C4.
C4=0.047 [µF], R3=75 [Ω], R4=75 [Ω]
●Notes of substrate layout
1) Please set the bypass capacitor (0.1µF) adjacently between the power supply and ground (for 75Ω driver).
BH7236AF: between VCC2 (pin 19) and GND2 (pin 24)
BH7240AKV: between AVCC2 (pin 9) and AGND2(pin 2)
2) Please set the capacitor and coil of Y trap filter directly to pins.
BH7236AF : pin 17
BH7240AKV : pin 10
3) The input line of subcarrier and logic input are intended to act as a barrier on both sides of line in order to
prevent coupling-capacitance.
BH7236AF : pin 6
BH7240AKV : pin 15, pin 16-19, pin 21-41
4) Digital inputs (8bitx3) wiring should be uniform in length.
(Only BH7240AKV) pin 16-19, pin 21-40
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© 2010 ROHM Co., Ltd. All rights reserved.
15/17
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
●Notes for use
1. Absolute Maximum Ratings
An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can
break down the devices, thus making impossible to identify breaking mode, such as a short circuit or an open circuit. If any
over rated values will expect to exceed the absolute maximum ratings, consider adding circuit protection devices, such as
fuses.
2. Operating Voltage Range and Operating Temperature Range
These conditions represent a range within which characteristics can be provided approximately as expected.
The electrical characteristics are guaranteed under the conditions of each parameter.
3. Reverse connection of power source connector
Connecting the of power supply in reverse polarity can damage IC. Take precautions when connecting the power supply
lines. An external direction diode can be added.
4. Power supply line
Design PCB layout pattern to provide low impedance GND and supply lines. To obtain a low noise ground and supply line,
separate the ground section and supply lines of the digital and analog blocks. Furthermore, for all power supply terminals
to ICs, connect a capacitor between the power supply and the GND terminal. When applying electrolytic capacitors in the
circuit, note that capacitance characteristic values are reduced at low temperatures.
5. GND voltage
Ground-GND potential should maintain at the minimum ground voltage level. Furthermore, no terminals should be lower
than the GND potential voltage including an electric transients.
6. Inter-pin shorts and mounting errors
Use caution when positioning the IC for mounting on printed circuit boards. The IC may be damaged if there is any
connection error or if positive and ground power supply terminals are reversed. The IC may also be damaged if pins are
shorted together or are shorted to other circuit’s power lines.
7. Operation in a strong electromagnetic field
Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to
malfunction.
8. Inspection of set circuit board
When testing the IC on an application board, connecting a capacitor to a pin with low impedance subjects the IC to stress.
Always discharge capacitors after each process or step. Always turn the IC's power supply off before connecting it to, or
removing it from a jig or fixture, during the inspection process. Ground the IC during assembly steps as an antistatic
measure. Use similar precaution when transporting and storing the IC.
9. Input terminals
In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the
parasitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the
input terminal. Therefore, pay thorough attention not to handle the input terminals, such as to apply to the input terminals a
voltage lower than the GND respectively, so that any parasitic element will operate. Furthermore, do not apply a voltage to
the input terminals when no power supply voltage is applied to the IC. In addition, even if the power supply voltage is
applied, apply to the input terminals a voltage lower than the power supply voltage or within the guaranteed value of
electrical characteristics.
10. Ground wiring patterns
The power supply and ground lines must be as short and thick as possible to reduce line impedance. Fluctuating voltage
on the power ground line may damage the device.
11. External capacitor
When using external ceramic capacitors, consider degradation in the nominal capacitance value due to DC bias and
changes in the capacitance with temperature.
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© 2010 ROHM Co., Ltd. All rights reserved.
16/17
2010.06 - Rev.A
Technical Note
BH7236AF,BH7240AKV
●Ordering part number
B
H
7
Part No.
2
3
6
A
F
Part No.
7236A
7240A
-
E
2
Package
Packaging and forming specification
F :SOP24
E2: Embossed tape and reel
KV:VQFP48C
SOP24
15.0 ± 0.2
(MAX 15.35 include BURR)
Embossed carrier tape
Quantity
2000pcs
13
Direction
of feed
0.3MIN
5.4±0.2
7.8±0.3
24
Tape
1
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
)
12
0.11
1.8±0.1
0.15 ± 0.1
0.4 ± 0.1
1.27
0.1
1pin
(Unit : mm)
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
Reel
VQFP48C
9.0 ± 0.2
7.0 ± 0.1
36
25
Embossed carrier tape
Quantity
1500pcs
0.5±0.15
0.75
48
13
1
1PIN MARK
Direction
of feed
E2
direction is the 1pin of product is at the upper left when you hold
( The
)
reel on the left hand and you pull out the tape on the right hand
+0.05
0.145 -0.03
1.6MAX
0.75
12
1.0±0.2
24
7.0±0.1
9.0±0.2
37
Tape
0.1±0.05
1.4±0.05
4 +6
-4
0.5 ± 0.1
0.08 S
+0.05
0.22 -0.04
0.08
1pin
M
(Unit : mm)
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© 2010 ROHM Co., Ltd. All rights reserved.
Reel
17/17
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
2010.06 - 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
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
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