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BU1425AK PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BU1425AK
기능 NTSC / PAL digital RGB encoder
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BU1425AK 데이터시트, 핀배열, 회로
Multimedia ICs
NTSC / PAL digital RGB encoder
BU1425AK / BU1425AKV
The BU1425AK / BU1425AKV are ICs which convert digital RGB / YUV input to composite (NTSC / PAL / PAL60),
luminance (Y), and chrominance (C) signals, and outputs the results.
Applications
Video interfaces for VIDEO-CDs and CD-G decoders
Features
1) Input clocks supported
27.0 / 13.5MHz
28.636 / 14.318MHz
28.375 / 14.1875MHz
35.4695 / 17.73475MHz
2) 24-bit RGB and 16-bit YUV input signals are sup-
ported.
3) Both master and slave systems are supported.
4) 9-bit high-speed DAC is used for DAC output of
composite VIDEO, Y, and C signals.
5) Internal 8-color OSD output function is provided.
6) FSC-TRAP on the Y channel can be turned on and
off.
7) C channel is equipped with an internal chromi-
nance band-pass filter in addition to the U.V. low-
pass filter.
8) 5V single power supply, low power consumption
(0.4W typ.)
9) Y and C output can be turned off (the power con-
sumption with Y and C off is 0.25W typ.).
10) In the Master mode, applying 3.3V to the I / O VDD
and 5.0V to other VDDs produces HSY and VSY
output with an amplitude of 3.3V. This enables
direct connection to LSIs that use a power supply
voltage of 3.3V. (The clock output for the OSD has
a fixed amplitude of 5.0V.)
11) In the Slave mode, applying voltage to the I / O VDD
only, and applying 0V to other VDDs, enables a cur-
rent consumption of 0 even when RGB DATA,
HSY, VSY, and OSD DATA are in the active state.
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BU1425AK pdf, 반도체, 판매, 대치품
Multimedia ICs
BU1425AK / BU1425AKV
Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Unit
Applied voltage
VDD, AVDD
– 0.5 ~ + 7.0
V
Input voltage
VIN
– 0.3 ~ IOVDD + 0.3
V
Storage temperature
Tstg
– 55 ~ + 150
Power dissipation
Pd
13501
1 Reduced by 11mW for each increase in Ta of 1°C over 25°C.
1 When mounted on 120mm × 140mm × 1.0mm glass epoxy board.
Operation is not guaranteed at this value.
Not designed for radiation resistance.
Recommended operating conditions
°C
mW
Parameter
Power supply voltage
Power supply voltage
Input high level voltage
Symbol
VDD = AVDD
IOVDD
VIH
Limits
4.50 ~ 5.50
3.30 ~ 5.50
2.1 ~ VDD
Unit
V
V
V
Input low level voltage
VIL
0 ~ + 0.8
V
Analog input voltage
VAIN
0 ~ AVDD
V
Operating temperature
Topr
– 25 ~ + 60
°C
Should be used at VDD = AVDD.
Electrical characteristics (unless otherwise noted, Ta = 25°C, VDD = AVDD = 5.0V, GND = AVSS = VGND = CGND = YGND)
Parameter
Symbol Min.
Typ.
Max.
Unit
Conditions
Digital block
Burst frequency 1
fBST1
— 3.57954 —
MHz
Burst frequency 2
fBST2
— 4.43361 —
MHz
Burst cycle
CBST
9
— CYC
Operating circuit current 1
Idd1
80
— mA 27MHz color bar
Operating circuit current 2
Idd2
40
— mA 27MHz color bar PD mode
Output high level voltage
VOH
4.0 4.5
V IOH = – 2.0mA
Output low level voltage VOL — 0.5 1.0 V IOH = 2.0mA
Input high level voltage
VIH 2.1 — — V
Input low level voltage
VIL — — 0.8 V
Input high level current
IIH – 10 0.0 10.0 µA
Input low level current
IIL – 10 0.0 10.0 µA
DAC block
DAC resolution
RES
9
— BITS
Linearity error
EL
± 0.5 ± 3.0
LSB IR = 1.2k
Y white level current
IYW
— 25.14 —
mA
Y black level current
IYB
— 7.24 —
mA
Y zero level current
IYZ – 10
0.0 10.0 µA
V white level current
IYW
— 25.14 —
mA
V black level current
IYB
— 7.24 —
mA
V zero level current
Sleep mode current
IYZ
Iddpd
– 10
0.0 10.0 µA
1.0
µA
VIN Max. = IOVDD + 0.3V
VIN Min. = – 0.3V
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BU1425AK 전자부품, 판매, 대치품
Multimedia ICs
Equivalent circuits
Pin No.
Pin name
I/O
2~8
10
GD (7: 0)
I
Equivalent circuit
BU1425AK / BU1425AKV
Function
G data input pin for 24-bit RGB input
Y data input pin for 16-bit YUV input
11 ~ 14
17 ~ 20
BD (0: 7)
I
54 ~ 56
58 ~ 60
62.63
RD (0: 7)
I
1 ROSD
57
64
GOSD
BOSD
I
15 OSDSW
23
24
IM0
IM1
I
16
CDGSWB
I
B data input pin for 24-bit RGB input
U, V data input pins for 16-bit YUV
input
R data input pin for 24-bit RGB input
OSD data input pin when using the
OSD function.
When the OSDSW pin is HIGH, input
to the ROSD, GOSD, and BOSD pins
takes precedence over RGB, and the
data is converted.
Control pins used to select RGB (24-
bit), YUV (16-bit) or DAC Through as
the input mode.
Switches the mode between Video-
CD (HIGH) and CD-G (LOW).
22
NTB
I
Switches the mode between NTSC
(LOW) and PAL (HIGH).
7

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부품번호상세설명 및 기능제조사
BU1425AK

NTSC / PAL digital RGB encoder

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