TA1276AFG Datasheet, PDF (39/83 Pages) Toshiba Semiconductor – PAL/NTSC Video Chroma And Deflection IC For CTV

Note
Parameter
V₅ D.ABL Detect Voltage
TA1276AFG
Test Conditions (unless otherwise stated, V_CC1 = 5 V, V_CC2/V_CC3/DEF V_CC = 9 V, Ta = 25 ± 3°C)
Switching Mode
SW₁₅ SW₄₉ SW₅₀ SW₅₃
Test Conditions
1) Set the BUS control data to the preset value.
2) Turn the Y mute off (1), set the ABL sensitivity to the minimum (000), set the D.ABL sensitivity to the maximum (111),
and turn the black stretch gain off (1).
3) Connect pin 8 to an external power supply (PS) and decrease the voltage from 6.5 V.
C OFF A
4) Repeat 3) when the D.ABL detect voltage bus data are 000, 001, 010, and 100 respectively. Measure PS voltages
V₀₀₀, V₀₀₁, V₀₁₀, and V₁₀₀ when the picture period of pin 3 changes to low. (enlarge the range before measuring.)
5) Next, calculate the ∆V₀₀₁, ∆V₀₁₀, and ∆V₁₀₀ voltage differentials from V₀₀₀ and V₀₀₁, V₀₁₀, and V₁₀₀.
∆V_*** = V₀₀₀ − V₀₀₁ (V₀₁₀, V₁₀₀)
C
Pin 3 Undetected
Pin 3 Detected
Pin 38
39
2002-04-01