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| BLM21P331SGPTM00-03资料 | |
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BLM21P331SGPTM00-03 PDF Download |
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File Size : 116 KB
Manufacturer: Description: The BLM21P331SGPTM00-03 tone ringer derives its power supply by rectifying the AC ringing signal. It uses this power to activate two tone generators. The two tone frequencies generated are switched by internal oscillator in a fast sequence and made audible across an output amplifier in the loudspeaker; both tone frequencies and the switching frequency can be externally adjusted. The device can drive either directly a piezo ceramic converter (buzzer) or small loudspeaker. In case of using a loud-speaker, a transformer is needed. An internal shunt voltage regulator provides DC voltage to the output stage, low frequency oscillator, and high frequency oscillator. To protect the IC from telephone line transients, a zener Diode is included. |
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| 1PCS | 100PCS | 1K | 10K | ||
| 价 格 | |||||
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型 号：BLM21P331SGPTM00-03 厂 家： 封 装：08＋ 批 号：2700 数 量： 说 明：原装现货 |
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运 费： 所在地： 新旧程度： |
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| 联系人：林小姐 |
| 电 话：0755-83041767,82716726 |
| 手 机：13570833454 |
| QQ：133289964,506456591,1062431938 |
| MSN：RFDZ0754@126.COM |
| 传 真：0755-82716726 |
| EMail：rxdz0754HK@126.com |
| 公司地址： 深圳市福田区华强北佳和大厦4C143 |
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