Part Number: OM8378
Function: TV signal processor- Closed Caption decoder
Package: DIP 64 Pin Type
Manufacturer: Philips Semiconductors
The OM8373 and OM8378 combine the functions of a video processor together with a µ-Controller and US Closed Caption decoder. The ICs are intended to be used in economy television receivers with 110° picture tubes. The ICs have supply voltages of 8 V and 3.3 V and they are mounted in a SDIP-64 envelope. The features are given in the following feature list.
1. Vision IF circuit suitable for negative modulation with alignment-free PLL demodulator
2. Internal (switchable) time-constant for the IF-AGC circuit
3. The mono intercarrier sound circuit has a selective FM-PLL demodulator which can be switched to the different FM sound frequencies (4.5/5.5/6.0/6.5 MHz). The quality of this system is such that the external band-pass filters can be omitted.
4. Source selection between the ‘internal’ CVBS and an external CVBS or Y/C signal