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TB1227CNG Datasheet(PDF) 45 Page - Toshiba Semiconductor

Part No. TB1227CNG
Description  VIDEO, CHROMA AND SYNCHRONIZING SIGNALS PROCESSING IC FOR PAL / NTSC / SECAM SYSTEM COLOR TV
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Maker  TOSHIBA [Toshiba Semiconductor]
Homepage  http://www.semicon.toshiba.co.jp/eng
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TB1227CNG Datasheet(HTML) 45 Page - Toshiba Semiconductor

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TB1227CNG
2004-05-24
45
TEST CONDITION (Unless otherwise specified : H, RGB VCC = 9V ; VDD, Fsc VDD, Y / C VCC = 5V ; Ta = 25±3°C)
SW MODE
NOTE
ITEM
S26
S1
S31
S33
S34
S39
S42
S44
S45
S51
MEASURING METHOD
C3
Band Pass Filter,
−3dB Band
Characteristic
ON
A
B
B
B
A
B
A
A
B
(1) Activate the test mode (S26-ON, Sub Add 02 ; 01h).
(2) Set as follows : band pass filter Q = 2, crystal clock = conforming to 3.579 / 4.43MHz.
(3) Set the gate to the normal status.
(4) Input 3N composite sine wave signal (1Vp-p) to pin 42 (Chroma IN).
(5) Measure frequency characteristic of B-Y output of pin 36, and measure peak frequency
in the −3dB band.
(6) Changing fo to 0, 500, 600 and 700 by the bus control and measure peak frequencies in
the −3dB band respectively with different fo.
C4
Band Pass Filter,
Q Characteristic
Check
(1) Activate the test mode (S26-ON, Sub Add 02 ; 01h).
(2) Set as follows : TV mode (fo = 600), Crystal mode = conforming to 3.579 / 4.43MHz,
gate = normal status.
(3) Input 3N composite sine wave signal (1Vp-p) to pin 42 (Chroma IN).
(4) Measure frequency characteristic of B-Y output of pin 36, and measure peak frequency
in the −3dB band.
(5) Changing fo of the band pass filter to 0, 500, 600 and 700 by the bus control and
measure peak frequencies in the −3dB band respectively with different fo.


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