Datasheet > FM1062

FM1062

更新时间： 2024-11-07 23:52:11

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
6页	104K
描述
Low Voltage Transmission Circuit

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FM1062 数据手册

Low voltage transmission circuits with dialler interface

FM1062 / FM1062A

1. GENERAL DESCRIPTION

The FM1062 and FM1062A are integrated circuits that perform all speech and line interface

functions required in fully electronic telephone sets. They perform electronic switching between

dialling and speech. 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. FM1062 / FM0162A improve the

EMC performance in-circuit which can enhance the telephone sets’ EMC.

2. FEATURES

• Low DC line voltage; operates down to 1.6 V (excluding polarity guard)

• Voltage regulator with adjustable static resistance

• Provides a supply for external circuits

• Symmetrical high-impedance inputs (64 κW) for dynamic, magnetic or piezoelectric microphones

• Asymmetrical high-impedance input (32 κW) for electret microphones

• DTMF signal input with confidence tone

• Mute input for pulse or DTMF dialling

– FM1062: active HIGH (MUTE)

– FM1062A: active LOW (MUTE)

• Receiving amplifier for dynamic, magnetic or piezoelectric earpieces

• Large gain setting ranges on microphone and earpiece amplifiers

• Line loss compensation (line current dependent) for microphone and earpiece amplifiers

• Gain control curve adaptable to exchange supply

• DC line voltage adjustment facility

• enhanced EMC performance

3. BLOCK DIAGRAM

Fig. 1 Block Diagram

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