TEA1067T
Description
The TEA1067 is a bipolar integrated circuit performing all speech and line interface functions required in fully electronic telephone sets. It performs electronic switching between dialling and speech.
Key Features
- Low DC line voltage; operates down to 1.6 V (excluding polarity guard)
- Voltage regulator with adjustable static resistance
- Provides supply with limited current for external circuitry
- Symmetrical high-impedance inputs (64 kΩ) for dynamic, magnetic or piezoelectric microphones QUICK REFERENCE DATA PARAMETER Line voltage Line current operating range CONDITIONS Iline = 15 mA normal operation TEA1067 TEA1067T with reduced performance Internal supply current power down input LOW input HIGH Supply voltage for peripherals Iline = 15 mA; Ip = 1.4 mA; mute input HIGH Iline = 15 mA; Ip = 0.9 mA; mute input HIGH Voltage gain range microphone amplifier receiving amplifier Line loss compensation gain control range Exchange supply voltage range Exchange feeding bridge resistance range PACKAGE OUTLINES TEA1067: 18-lead DIL; plastic (SOT102). SOT102-1; 1998 Jun 18. TEA1067T: 20-lead mini-pack; plastic (SO20; SOT163A). SOT163-1; 1998 Jun 18. June 1990 2 Rexch 0.4 - ∆Gv Vexch 5.5 36 5.9 - Gv Gv 44 20 - - VCC 2.5 - VCC 2.2 2.4 ICC ICC - - 1 55 Iline Iline Iline 11 11 1 - - - SYMBOL VLN MIN. 3.65 TYP. 3.9 TEA1067
- Asymmetrical high-impedance input (32 kΩ) for electret microphone
- DTMF signal input with confidence tone
- Mute input for pulse or DTMF dialling
- Power down input for pulse dial or register recall
- Receiving amplifier for magnetic, dynamic or piezoelectric earpieces
- Large gain setting range on microphone and earpiece amplifiers
