Information as of 2000-01-10
 Latest information online 

TEA1114A; Low voltage telephone transmission circuit with dialler interface and regulated strong supply

• Description • Features • Applications • Datasheet • Products, packages, availability and ordering • Find similar products •

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Description

The TEA1114A is a bipolar integrated circuit that performs all speech and line interface functions required in fully electronic telephone sets. It performs electronic switching between speech and dialling. The IC operates at a line voltage down to 1.45 V DC (with reduced performance) to facilitate the use of telephone sets connected in parallel.

Features

• Low DC line voltage; operates down to 1.45 V (excluding voltage drop over external polarity guard)
• Line voltage regulator with adjustable DC voltage
• 3.3 V regulated strong supply point for peripheral circuits compatible with:
  - Speech mode
  - Ringer mode
  - Trickle mode.
• Transmit stage with:
  - Microphone amplifier with symmetrical high impedance inputs
  - DTMF amplifier with confidence tone on receive output.
• Receive stage with:
  - Receive amplifier with asymmetrical output
  - Earpiece amplifier with adjustable gain (and gain boost facility) for all types of earpieces.
• MUTE input for pulse or DTMF dialling
• AGC line loss compensation for microphone and receive amplifiers.

Applications

• Line powered telephone sets with LCD module
• Cordless telephones
• Fax machines
• Answering machines.

Datasheet

Type nr.	Title	Publication release date	Datasheet status	Page count	File size (kB)	Datasheet
TEA1114A	Low voltage telephone transmission circuit with dialler interface and regulated strong supply	14-Sep-99	Product Specification	24	166	Open

Products, packages, availability and ordering

Partnumber	Order code (12nc)	marking/packing	package	device status	buy online
TEA1114A/C1	9352 600 44112	Standard marking * tube	SOT38	RFS	-
TEA1114A/C2	9352 633 79112	Standard marking * tube	SOT38	RFS	-
TEA1114AT/C1	9352 600 42112	Standard marking * tube	SOT109	WIT	-
	9352 600 42512	Standard marking * tube dry pack	SOT109	RFS
	9352 600 42518	Standard marking * reel dry pack, SMD, 13"	SOT109	RFS
TEA1114AT/C2	9352 633 80512	Standard marking * tube dry pack	SOT109	RFS	-
	9352 633 80518	Standard marking * reel dry pack, SMD, 13"	SOT109	RFS	-

Please note, devices listed in the "Products, packages, availability and ordering" table marked with "WIT" are discontinued. Devices marked with "DOD" will be in the near future.
Contact your nearest sales or distributor office for the latest information on product status and availability.

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