TA1276AFG Datasheet, PDF (50/83 Pages) Toshiba Semiconductor – PAL/NTSC Video Chroma And Deflection IC For CTV

Note
Parameter
C₅ NTSC Ident Sensitivity
C₆ PAL Ident Sensitivity
C₇ TOF Characteristics
TA1276AFG
Test Conditions (unless otherwise stated, V_CC1 = 5 V, V_CC2/V_CC3/DEF V_CC = 9 V, Ta = 25 ± 3°C)
Subaddress
Switching Mode
07
10
17
18 SW₅ SW₆ SW₁₃ SW₁₅
Test Conditions
1) Input a 3.58-NTSC rainbow (C-4 signal) burst/chroma signal with the same
burst/chroma amplitudes to the chroma input pin (TP54).
2) Observe the BUS READ mode (5^th and 6^th bits of the 1^st byte).
C₀
80
or
00
00 OPEN OPEN B
D₀
3) Switch the Indent sensitivity (set the subaddress (10) data low (C₀) and high (D₀))
and perform the following measurements.
A _{4) Increase the input signal amplitude from 0 and measure the input signal amplitude}
at the switch to 3.58 NTSC mode.
(LOW (C₀): vN_CL, High (D₀): vN_CH)
5) Lower the input signal amplitude from 100 mVp-p and measure the input signal
amplitude at the deviation from 3.58 NTSC mode.
(LOW (C₀): vN_BL, High (D₀): vN_BH)
1) Input a 4.43-PAL rainbow (C-4 signal) burst/chroma signal with the same
burst/chroma amplitude to the chroma input pin (TP54).
2) Observe the BUS READ mode (5^th and 6^th bits of the 1^st byte).
3) Switch the Indent sensitivity (set the subaddress (10) data low (C₀) and high (D₀))
and perform the following measurements.
↑
↑
↑
↑
↑
↑
↑
↑ _{4) Increase the input signal amplitude from 0 and measure the input signal amplitude}
at the switch to 4.43 PAL mode.
(LOW (C₀): vP_CL, High (D₀): vP_CH)
5) Lower the input signal amplitude from 100 mVp-p and measure the input signal
amplitude at the deviation from 4.43 PAL mode.
(LOW (C₀): vP_BL, High (D₀): vP_BH)
1) Input the signal C-1 to the chroma input pin (TP54).
(signal amplitude = 50 mV_p-p).
2) When the subaddress (10) data are f₀ = 3.58 MHz (00) and f₀ = 4.43 MHz (60), and
subaddress (18) data are (38), connect 1.5 kΩ between the V_I output pin 6 and the
5 V-V_CC and observe the V_I output pin 64.
3) Measure the output amplitude when f₀ = 3.58 MHz and calculate the gain in
00
decibels from the input (GF_C3).
↑
or
↑
38
↑
60
↑
↑
↑ _{4) Measure the output amplitude when f0 = 3.58 MHz ± 500 kHz and calculate the}
gain in decibels from the input
(+500 kHz: GF_H3, −500 kHz: GF_L3).
5) Measure the output amplitude when f₀ = 4.43 MHz and calculate the gain in
decibels from the input (GF_C4).
6) Measure the output amplitude when f₀ = 4.43 MHz ± 500 kHz and calculate the
gain in decibels from the input
(+500 kHz: GF_H4, −500 kHz: GF_L4).
50
2002-04-01