Telephone RingersICs
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HT9200B![]() |
- Kiểu chân: DIP(14); Hãng: Holtek; |
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TEA1062![]() |
- Kiểu chân: DIP(16); Hãng: PHILIPS; - The ICs operate at line voltage down to 1.6 V DC (with reduced performance) to facilitate the use of more telephone sets connected in parallel.
- Mute input for pulse or DTMF dialling
* TEA1062: active HIGH (MUTE)
* TEA1062A: active LOW (MUTE)
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UM91214A![]() |
- Kiểu chân: DIP(16); Hãng SX: UMC-Unicorn Microelectronics; - It provides dialing pulse (DP) or dual tone multi-frequency (DMTF) dialing. A standard 4x4 Matrix keyboard can be used to support either DP or DMTF modes. Up to 32 digits can be saved in the on-chip RAM for redialing; - Operating voltage range: 2V to 5.5V. |
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