參數(shù)資料
型號(hào)： TMC2490A
廠商： Fairchild Semiconductor Corporation
英文描述： Multistandard Digital Video Encoder
中文描述： 多標(biāo)準(zhǔn)數(shù)字視頻編碼器
文件頁數(shù)： 4/36頁
文件大小： 510K
代理商： TMC2490A
TMC2490A
PRODUCT SPECIFICATION
REV. 1.0.2 2/27/02
4
SDA, R/W
6
R-Bus/TTL
Serial Data/Read/Write Control.
data line of the serial interface. When SER is HIGH, the pin is the
read/write control for the parallel interface. When R/W and CS are
LOW, the microprocessor can write to the control registers over
D
7-0
. When R/W is HIGH and CS is LOW, it can read the
contents of any selected control register over D
Serial Clock/Chip Select.
When SER is LOW, SCL is the clock
line of the serial interface. When SER is HIGH, the pin is the chip
select control for the parallel interface. When CS is HIGH, the
microprocessor interface port, D
7-0
and ignored. When CS is LOW, the microprocessor can read or
write parameters over D
7-0
.
Serial/Parallel Port Select.
When LOW, the 2-line serial
interface is activated. Pins 5, 6, and 7 function as SA
SCL respectively. When HIGH, the parallel interface port is active
and pins 5, 6, and 7 function as ADR, R/W, and CS respectively.
When SER is LOW, SDA is the
7-0
.
SCL, CS
7
R-Bus/TTL
, is set to HIGH impedance
SER
8
TTL
0
, SDA, and
Outputs
CHROMA
35
1.35V p-p
Chrominance-only Video.
converter. Maximum output is 1.35 volts peak-to-peak into a
doubly terminated 75 Ohm load.
Composite NTSC/PAL Video.
converter. Maximum output is 1.35 volts peak-to-peak into a
doubly terminated 75 Ohm load.
Luminance-only Video.
Analog output of luminance D/A
converter. Maximum output is 1.35 volts peak-to-peak into a
doubly terminated 75 Ohm load.
Analog output of chrominance D/A
COMPOSITE
30
1.35V p-p
Analog output of composite D/A
LUMA
32
1.35V p-p
Analog Interface
C
BYP
33
0.1
μ
F
Reference Bypass Capacitor.
decoupling capacitor to V
Current-setting Resistor.
setting resistor for D/A converters. The resistor is connected
between R
REF
and GND. Output video levels are inversely
proportional to the value of R
REF
Voltage Reference Input.
External voltage reference input,
internal voltage reference output, nominally 1.235 V.
Connection point for 0.1
at pin 34.
Connection point for external current-
μ
F
DD
R
REF
28
787
.
V
REF
27
+1.235V
SYNC Out
HSYNC
VSYNC, T/B
CBSEL, PDC
SELC
Power Supply
V
DD
GND
18
19
20
21
TTL
TTL
TTL
TTL
Horizontal Sync Output.
Vertical Sync Output or Odd/Even Field ID Output
Pixel Data Phase Output or Video Blanking Output.
Luma/Chroma MUX Control.
.
1, 23, 26, 37
2, 13, 24, 29,
31, 36
34
+5V
0.0V
Power Supply.
Ground.
Positive power supply.
V
DDA
+5V
Analog Power Supply.
Positive power supply.
Pin Descriptions
(continued)
Pin Name
Pin Number
Value
Pin Function Description
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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TMC2490AR2CT 功能描述:視頻 IC RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
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