STMicroelectronics M491B
The M491B is a monolithic N-MOS LSI circuit including a Floating-gate Non-Volatile Memory for storage of up to 16 stations. It is designed for 7-segment LED displays.| Part No. | M491B |
|---|---|
| Datasheet | M491B Download |
| Manufacturer |  STMicroelectronics |
| Description | SINGLE-CHIP VOLTAGE SYNTHESIS TUNING SYSTEM WITH 1 ANALOG CONTROL |
| Buy | Stock & Price |
DESCRIPTION
Tuning of the station is performed with a 8192 step D/A converter, using the principle of voltage synthesis. It is designed for 7-segment LED displays. Direct memory selection is possible only from remote control while Up/Down memory scanning is possible on the set and also from remote control. An option input for 8 or 16 stations is available. The circuit also includes a PCM remote control receiver operating in conjuncSeptember 1992 VDD TEST I.R. INPUT AFT 1 AFT 2 SWEEP DISPLAY OUT VOLUME D/A LINEAR AFT DEF. DIGITAL AFT EN. V3 V2 V1 1/16 2/16 V PP (25V) +5V IR V DD V SS M491B FUNCTIONAL DIAGRAM 445 to 510MHz M708 TDA2320 or 8160 445 to 510MHz MT 1 3 2 7 8 10 MS OSC IN OSC OUT TEST 11 V SS 32 5 TUNING D/A FINE TUNING D/A VHF I 9 OPT. 8/16 40 VHF III 31 4 4.5 to 13.2V h CAT V 38 UHF 37 14 SWEEP DISPLAY OUT AFT1 12 BAND OUT f a 39 g b i e c d +12V M491B a 27 b 28 29 30 33 34 35 36 17 16 15 26 25 6 13 c AFT2 AUTO SEARCH STOP DIGITAL AFT DIGITAL AFT STATUS DIGITAL AFT ENABLE UP (AFT1) (AFT2) DOWN AFC-Scurve d e LINEAR AFT DEFEAT VOLUME D/A MAINS ON/OFF f g h-i MAINSON OPTION 20 V1 V2 19 18 V3 24 22 21 23 X1 X2 X3 X4 491B-02.
