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HT6221/HT6222 --
Multi-Purpose Encoders
General Description
The HT6221/HT6222 are CMOS LSI encoders
designed for use in remote control systems. They are
capable of encoding 16-bit address codes and 8-bit data
codes. Each address/data input can be set to one of the
two logic states, 0 and 1.
The HT6221/HT6222 contain
32 keys (K1~K32) and 64 keys (K1~K64), respectively. When
one of the keys is triggered, the programmed address/data
is transmitted together with the header bits via an IR
(38kHz carrier) transmission medium.
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Features
- Operating voltage: 1.8V~3.5V
- DOUT with 38kHz carrier for IR medium
- Low standby current
- Minimum transmission word: one word
- 455kHz ceramic resonator or crystal
- 16-bit address codes
- 8-bit data codes
- PPM code method
- Three double-active keys
- Maximum active keys:
- HT6221: 32 keys
- HT6222: 64 keys
- Low power and high noise immunity CMOS technology
- HT6221: 20-pin SOP package
HT6222: 24-pin SOP package
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