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| L7581AAE资料 | |
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L7581AAE PDF Download |
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File Size : 116 KB
Manufacturer:LUCENT Description: Function Regulated output voltage of 2.7 V for biasing a DTMF generator activated by MUTE. The receive amplifier input. The receiving amplification is regulated of an a.g.c. Positive supply voltage input to the device. This input should be connected to the positive output of the polarity guard. The current through this pin is modulated by the transmit signal. An external resistor (2 W) is required from this pin to GND to control the dc input impedance of the circuit. It has a nominal value of 56 W for low voltage operation. Values up to 100 W may be used to increase the available transmit output voltage swing at the expense of low- voltage operation. This internal voltage bias line must be connected to VL via an external resistor, RB, which dominates the ac input imped- ance of the circuit and should be 620 Ω for an 600 W input impedance or 910 Ω for a 900 Ω input impedance. The range of transmit and receive gain variations between short and long loops may be adjusted by connecting a resistor REX1 from this pin to Pin 3 (GND). This pin can be left open to set a.g.c. out of action. |
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| 1PCS | 100PCS | 1K | 10K | ||
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型 号：L7581AAE 厂 家：LUCENT 封 装：SOP 批 号：07+ 数 量：500 说 明：100%真实库存，原装，部分现货 |
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运 费： 所在地：深圳 新旧程度： |
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| 联系人：陈小姐 |
| 电 话：0755-83605789 |
| 手 机：13428979109 |
| QQ：656259901,307704921 |
| MSN：chenqiongxia18@126.com |
| 传 真：0755-23816523 |
| EMail：656259901@qq.com |
| 公司地址： 广东深圳市福田区华强北（振华路）赛格高科德电子市场A1848室 |
