This Japanese-language datasheet from Toshiba describes the TA1229NG, a silicon bipolar linear integrated circuit for SECAM demodulation in color TVs, housed in a 24-pin shrink DIP plastic package (SDIP24-P-300-1.78). According to the document, the TA1229NG combines with PAL/NTSC demodulator ICs such as the TA1222BN to form a PAL/NTSC/SECAM system, and the IC is controlled via an I2C bus.
The document lists features such as a built-in SECAM BELL filter, de-emphasis circuit and automatic ident search circuit, then gives a block diagram, pin-by-pin terminal functions with typical voltages and signal levels, and the bus control map for write and read functions (slave address switching via terminal 14). It ends with the package outline drawing and soldering test conditions. This manual is written in Japanese.
| Product type | Silicon bipolar linear IC, SECAM demodulator for color TV |
|---|---|
| Mass | 1.22 g (typical) |
| Supply voltage | 9 V (Typ) |
| SCP input thresholds | CP 7.0 V, HP 3.5 V, VP 1.5 V (Typ) |
| Crystal frequency | 4 MHz Xtal |
| B-Y output level | 670 mVp-p |
| R-Y output level | 950 mVp-p |
It is a SECAM demodulator IC for color TVs; combined with a PAL/NTSC demodulator IC such as the TA1222BN it forms a PAL/NTSC/SECAM system.
The IC is controlled by an I2C bus, with write/read functions set through the bus control map.
A typical supply voltage of 9 V is connected to the Vcc terminal.
It is supplied in the SDIP24-P-300-1.78 package, a 24-pin shrink DIP plastic package with a mass of 1.22 g (typical).