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SAA3049AT Datasheet(PDF) 7 Page - NXP Semiconductors |
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SAA3049AT Datasheet(HTML) 7 Page - NXP Semiconductors |
7 / 16 page 1996 Sep 13 7 Philips Semiconductors Product specification Infrared remote control decoder SAA3049A Reset The circuit is shown in Figs 5, 6 and 7. The alternative reset circuit shown in Fig.3 protects against short term power supply transients by generating a reset. The reset pin should either be connected to external reset circuitry as proposed or connected to VSS. If connected to VSS, a reset pulse will be generated by the on-chip Power-on reset circuit at typically 1.3 V ( ±500 mV accuracy). Fig.3 Proposed improved reset circuit. handbook, full pagewidth MGE375 390 Ω 1 k Ω 68 k Ω 1.8 k Ω 1 µF 1N4148 1N4148 zener diode 3.6 V BC548 VCC 20 14 SAA3049A Infrared signal input (pin 9) This pin is sensitive to a negative-going edge. Command received indicator (pin 19) Fig.4 Output diagram of command acknowledge. handbook, halfpage MGE376 ≈15 ms ≈120 ms signal at pin 19 APPLICATION INFORMATION In Fig.5, the circuit shown is for use with transmitters SAA3004, SAA3007 or SAA3008; pin 11 is HIGH for RECS80 code. In Fig.6, the circuit shown is for use with transmitter types SAA3006 or SAA3010; pin 11 is LOW for RC5 code. In Fig.7, the decoder is set for the required subaddress by holding the address pins HIGH or LOW. Pin 11 is HIGH for use with transmitter types SAA3004, SAA3007 or SAA3008 (RECS80 code). Pin 11 is LOW for use with transmitter types SAA3006 or SAA3010 (RC5 code). The remote control decoder is for up to 32 subaddresses with 6 + 1-bit parallel outputs (RC5 code). |
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