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
BH7236AF
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
-
SOP24
BH7240AKV
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)
VQFP48C
VOUT
YOUT
COUT
ROUT
GOUT
BOUT
Input DAC(only BH7240AKV)
Package
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
1/17
2010.06 - Rev.A
BH7236AF,BH7240AKV
●Absolute
maximum ratings
Parameter
Supply voltage
BH7236AF
Power dissipation
BH7240AKV
Storage temperature range
Tstg
Pd
900
-55
½
+125
※2
℃
Symbol
VCC
Ratings
7
550
※1
mW
Unit
V
Technical Note
※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
Parameter
Supply voltage
Operation temperature range
Input High level (SYNCIN, NT/PAL)
Input Low level(SYNCIN,NT/PAL)
Input level (SCIN)
[BH7236AF]
Input level(R,G,B)
[BH7240AKV]
Input High level
(VCLK,RDATA,GDATA,BDATA)
Input Low level
(VCLK,RDATA,GDATA,BDATA)
VIH2
VIL2
2.2
½
5.0
0
½
0.8
※1
※1
V
V
Vrgbi
0
½
1.0
Vpp
Symbol
VCC
Topr
VIH
VIL
Vsci
Ratings
4.5
½
5.5
-20
½
+70
2.2
½
5.0
0.0
½
0.8
0.4
½
5.0
※1
※1
Unit
V
℃
V
V
Vpp
※1
BH7236AF: VCC1=VCC2=5.0V BH7240AKV: DVDD=AVCC1=AVCC2=5.0V
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
2/17
2010.06 - Rev.A
BH7236AF,BH7240AKV
●Electrical
characteristics
◎BH7236AF(Ta=25℃,
VCC1=VCC2=5.0V unless otherwise noted.)
Limits
Parameter
Symbol
Min.
Typ.
Consumption current
Luminance level (Vout,Yout)
White level
Red level
Green level
Blue level
Sync level
Sync/White level ratio
Chroma level (Vout,Cout)
Red/Burst level ratio
Green/Burst level ratio
Blue/Burst level ratio
Burst level
Red phase
Green phase
Blue phase
PAL burst phase
θbur-
PAL burst level ratio
Carrier leak
RGB level (Rout,Gout,Bout)
Red level
Green level
Blue level
SYNCOUT High level
SYNCOUT Low level
Output DC voltage
YOUT
COUT
VOUT
ROUT
GOUT
BOUT
Vyo
Vco
Vvo
Vro
Vgo
Vbo
1.30
2.00
1.15
1.40
1.40
1.40
1.70
2.40
1.55
1.80
1.80
1.80
2.10
2.80
1.95
2.20
2.20
2.20
V
V
V
V
V
V
Vro
Vgo
Vbo
Vhsync
Vlsync
0.63
0.63
0.63
3.90
-
0.70
0.70
0.70
-
-
0.77
0.77
0.77
-
0.80
Vpp
Vpp
Vpp
V
V
Rbur
Vcl
Vcr/Vbur
Vcg/Vbur
Vcb/Vbur
Vbur
θred
θgreen
θblue
θbur+
2.84
2.65
2.01
0.23
94
231
337
125
215
0.9
-
3.16
2.95
2.24
0.29
104
241
347
135
225
1.0
-
3.48
3.25
2.47
0.35
114
251
357
145
235
1.1
35
-
-
-
Vpp
deg
deg
deg
deg
deg
-
mVpp
Vlwhite
Vlred
Vlgreen
Vlblue
Vsync
Rs/w
0.63
0.19
0.37
0.07
0.27
0.38
0.70
0.21
0.41
0.08
0.30
0.43
0.77
0.23
0.45
0.09
0.33
0.48
Vpp
Vpp
Vpp
Vpp
Vpp
Icc
-
42
Technical Note
Max.
55
Unit
mA
Condition
RIN=GIN=BIN=0.0Vpp input
RIN=GIN=BIN=1.0Vpp input
RIN= 1.0Vpp input
GIN= 1.0Vpp input
BIN= 1.0Vpp input
Rs/w = Vsync/Vlwhite
RIN= 1.0Vpp input
GIN= 1.0Vpp input
BIN= 1.0Vpp input
※1
※1
※1
※2
RIN= 1.0Vpp input
GIN= 1.0Vpp input
BIN= 1.0Vpp input
※1
※1
※1
Color subcarrier
※1
=4.433619MHz (NT/PAL = L)
Level ratio per line
※2
RIN= 1.0Vpp input
GIN= 1.0Vpp input
BIN= 1.0Vpp input
※1
This specification is design target.
※2
This specification is measured with 3.58MHz BPF.
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
3/17
2010.06 - Rev.A
BH7236AF,BH7240AKV
◎BH7240AKV(Ta=25℃,
DVDD=AVCC1=AVCC2=5.0V unless otherwise noted.)
Limits
Parameter
Symbol
Unit
Min.
Typ.
Max.
Consumption current
Luminance level (Vout,Yout)
White level
Red level
Green level
Blue level
Sync level
Sync/White level ratio
Chroma level (Vout,Cout)
Red/Burst level ratio
Green/Burst level ratio
Blue/Burst level ratio
Burst level
Red phase
Green phase
Blue phase
RGB level (Rout,Gout,Bout)
Red level
Green level
Blue level
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
Vrout
Vgout
Vbout
0.56
0.59
0.59
0.70
0.70
0.70
0.81
0.81
0.81
Vpp
Vpp
Vpp
Vcr/Vbur
Vcg/Vbur
Vcb/Vbur
Vbur
θred
θgreen
θblue
2.69
2.51
1.91
0.25
94
231
337
3.16
2.95
2.24
0.29
104
241
347
3.63
3.39
2.57
0.33
114
251
357
-
-
-
Vpp
deg
deg
deg
Vlwhite
Vlred
Vlgreen
Vlblue
Vsync
Rs/w
0.59
0.18
0.35
0.07
0.27
0.37
0.70
0.21
0.41
0.08
0.30
0.43
0.81
0.24
0.47
0.09
0.33
0.49
Vpp
Vpp
Vpp
Vpp
Vpp
Icc
-
85
105
mA
Technical Note
Condition
RGB DATA=00h input
RGB DATA=FFh input
R DATA=FFh input
G DATA=FFh input
B DATA=FFh input
R DATA=FFh input
G DATA=FFh input
B DATA=FFh input
※1
※1
※1
※2
R DATA=FFh input
G DATA=FFh input
B DATA=FFh input
※1
※1
※1
R DATA=FFh input
G DATA=FFh input
B DATA=FFh input
Fda
Tset
Thold
IH
IL
-
20
20
-
-200
-
-
-
-
-
20
-
-
300
-
MHz
nsec
nsec
µA
µA
Terminal is applied to 5V.
Terminal is applied to 0V.
※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.
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
4/17
2010.06 - Rev.A
BH7236AF,BH7240AKV
●Block
diagram, Application circuit, Pin arrangement
(BH7236AF)
Technical Note
GND1
RIN
1
2
0.1µF
24
CLAMP
SYNC
SYNC
GND2
75Ω
75Ω
23
220µF
ROUT
75Ω
GIN
3
0.1µF
CLAMP
SYNC
75Ω
22
220µF
75Ω
GOUT
BIN
4
0.1µF
CLAMP
SYNC
75Ω
21
220µF
BOUT
75Ω
MATRIX
75Ω
FILTER
N.C.
SCIN
VCC1
PHASE
SHIFTER
5
6
20
19
VOUT
220µF
VCC2
B-Y MOD.
B-Y MOD.
Y/C MIX
VCC2
0.1µF
GND2
F
・
F
BFP
DELAY
BFP
NT/PAL
GND1
7
8
18
17
NTSC
PAL
C
L
27pF 68µH
22pF 68µH
N.C.
BFPOUT
YTRAP
C [pF] L [µH]
GND1
BFP
SYNC
MIX
N.C.
SYNCIN
9
10
11
VCC1
BFP GEN.
75Ω
16
220µF
75Ω
YOUT
SYN
75Ω
15
0.47µF
75Ω
COUT
SYNCOUT
14
13
N.C.
VCC1
0.1µF
12
N.C.
GND1
Fig. 1 BH7236AF Block Diagram
Terminal
number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Terminal
name
GND1
RIN
GIN
BIN
N.C.
SCIN
NT/PAL
BFPOUT
N.C.
SYNCIN
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)
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
5/17
2010.06 - Rev.A