TA1276AFG Datasheet, PDF(52/83 Page) Toshiba Semiconductor – PAL/NTSC Video Chroma And Deflection IC For CTV

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TA1276AFG Datasheet, PDF (52/83 Pages) Toshiba Semiconductor – PAL/NTSC Video Chroma And Deflection IC For CTV

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Note

Parameter

T7 Half Tone Characteristics

TA1276AFG

SW33

SW34

SW35

Test Conditions (unless otherwise stated, VCC1 = 5 V, VCC2/VCC3/DEF VCC = 9 V, Ta = 25 Â± 3Â°C)

Switching Mode

SW37 SW38 SW39 SW51 SW52 SW53

Test Conditions

1) Input signal 1 (f0 = 100 kHz, picture period amplitude = 0.2 Vp-p) to pin 78.

2) Measure the picture period amplitude of pin 15 (V41A).

3) Apply 1.5 V from an external power supply to pin 6.

A 4) Measure the picture period amplitude of pin 15 (V41B).

5) GHT1 = V41B/V41A

6) Halt the voltage applied to pin 6, set the subaddress (03) data to (81), and

measure the picture period amplitude of pin 15 (V41C).

7) GHT2 = V41C/V41A

1) Calculate tdON, tdOFF from the signal applied to pin 25 (H.BLK input) (A

below) and the output signals from pins 11, 13, and 15 (B below).

(A) Signal applied to pin 25

63.5 Âµs

T8 BLK Pulse Delay Time

(B) Output signals from pins

11, 13, 15

tdON

tdOFF

T9 RGB Output Voltage

T10

Cutoff Voltage Variable

Range

â 1) Measure the picture period voltages for pins 11, 13, and 15.

1) Set the subaddress (17) data to (07).

2) Measure the picture period voltage of pin 11 when the cutoff (subaddress

0C) data are changed to maximum (FF), center (80), and minimum (00),

and calculate the amount of change of maximum and minimum from the

center. (CUT+, CUTâ).

3) In steps 1) and 2) above, make the following changes and remeasure:

Change the subaddress (0D) data and measure pin 13,

Change the subaddress (0E) data and measure pin 15.

2002-04-01

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