GENERAL DESCRIPTION
The TEA1069 and TEA1069A contain all the functions needed to build a highly featured, high-performance fully electronic telephone set.
The device incorporates a speech/transmission part, a dialler part and a ringer part. By offering a wide range of possible adaptations for each part, the TEA1069 and TEA1069A application can be easily adapted to meet different requirements.
The TEA1069A offers some different timings and diode options compared to the TEA1069.
Where pin numbers are mentioned in this data sheet we refer to the TEA1069N, unless otherwise indicated.

FEATURES
Speech part
• Voltage regulator with adjustable static resistance
• Low DC line voltage; operates down to 1.6 V (excluding polarity guard)
• Supply for dialler part and peripherals (not stabilized)
• Symmetrical high-impedance inputs (64 kΩ) for
   dynamic, magnetic, or piezoelectric microphones
• Asymmetrical high-impedance input (32 kΩ) for electret microphones
• Asymmetrical earpiece output for dynamic, magnetic,
   or piezoelectric earpieces
• Internal mute to disable speech during dialling
• Confidence tone during DTMF dialling
• Line-loss compensation (line-current dependent) for
   microphone and earpiece amplifiers
• Gain-control curve adaptable to the exchange supply.

Dialler part
• Pulse/DTMF and mixed mode dialling
• Last Number Redial (LNR), up to 32 digits
• 13 repertory numbers (3 direct and 10 indirect) or
   10 repertory numbers (10 direct), up to 32 digits,
   with a maximum of 224 digits in total
• Repertory and redial memory integrity check
   (memory contents check)
• Notepad memory function
• Flash and earth register recall
• Dial mode output
• Access pause generation and termination
• Function keys for: store, memory recall, register recall,
   LNR, pause, hold, mute, hook
• Keytone generation
• Hands-free control
• Volume control in hands-free mode (VOL+/VOL−)
• Hold function
• Mute function
• Music-on-hold
• Diode options:
   – DTMF tone burst/pause time
   – make/break ratio
   – access pause time
   – pulse or DTMF mode selection
   – register recall (earth and flash times)
   – keyboard layout selection
   – selection for german requirements
   – hold/mute mode selection.

Ringer part
• Ringer input frequency discrimination
• Ringer melody generation (3-tone)
• Ringer melody selection/volume control via keyboard
• Diode option: ringer frequency selection.