مدار مجتمع (آی سی) آی‌سی واسط ارتباطی آی‌سی مخابراتی

Product Attributes

Introduction

The UTC TEA1110A is a versatile telephone transmission circuit providing full speech and line interface functions in electronic telephone sets. This device works at a line voltage which can be as low as 1.6V DC (with reduced performance) to enable parallel connection of telephone sets. It also realizes electronic switching between speeches and dialling.

Features

• Low DC line voltage; operates down to 1.6V (excluding voltage drop over external polarity guard)
• Voltage regulator with adjustable DC voltage
• Provides a supply for external circuits
• Symmetrical high impedance inputs (64kΩ) for dynamic, magnetic or piezo - electric microphones
• Asymmetrical high impedance input (32kΩ) for electric microphones
• DTMF input with confidence tone
• MUTE input for pulse or DTMF dialling
• Receiving amplifier for dynamic, magnetic or piezo - electric earpieces
• AGC line loss compensation for microphone and earpiece amplifiers.

Applications

• line powered telephone sets
• cordless telephones
• fax machines
• answering machines