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Basic Information
Question 1
What are the contents of Holtek's TV Remote Series? What are the differences among them?
Answer
| Part No. |
Encoder/Decoder |
VDD |
Addr. No. |
Addr. /
Data No. |
Key No. |
38kHz
Carrier |
Package |
| HT6221 |
Encoder |
1.8V~3.5V |
16 |
8 |
32 |
v |
20SOP |
| HT6222 |
Encoder |
1.8V~3.5V |
16 |
8 |
64 |
v |
24SOP |
| HT6230 |
Encoder |
2.4V~5.2V |
5 |
6 |
96 |
v |
28SOP |
| HT6240-002 |
Encoder |
2.2V~3.6V |
8 |
8 |
32 |
v |
20/24SOP |
Application Description
Question 1
Can I use a 36kHz Infrared receiver to work with HT6221 series devices?
Answer
Yes. The HT6221 series devices use 455kHz Resonator to generate 38kHz carrier on Dout pin, which will work with 38kHz Infrared receiver. If 36kHz Infrared receiver is required, just simply replace with a lower frequency Resonator which can generate 36kHz carrier.
Points to Note
Question 1
What are the pairing decoders for HT6221, HT6222, HT6230 and HT6240?
Answer
The HT6221, HT6222, HT6230 and HT6240 are dedicated for TV remote control encoder use and they are functionally compatible with some widely-used encoder chips from other vendors. Usually, the MCU is used as decoder in the TV set, therefore there is no single purpose decoder IC.
Others
Question 1
What are the devices compatible with Holtek's TV Remote Series?
Answer
| Product No. |
Compatible |
| HT6221 |
uPD6121 |
| HT6222 |
uPD6122 |
| HT6230 |
SAA3010 |
| HT6240-002 |
M50560 |
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