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Atmel Electronic Components Datasheet

U3761MB-T Datasheet

Universal Telephone IC

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Features
Speech Circuit
Adjustable DC Characteristic
Symmetrical Input of Microphone Amplifier
Receiving Amplifier for Dynamic or Piezo-electric Earpieces
Automatic Line-loss Compensation
Dialer
DTMF/Pulse Switchable
Pulse Dialing 66/33 or 60/40 or DTMF Dialing Selectable by Pin
Selectable Flashing Duration by Key Pad
Pause Function
Optical Indication of Temporary DTMF Mode
Keytone for Pulse Dialing
Last Number Redial up to 32 Digits
Three by 17 Digits Direct (One-touch) Memory
Ten by 17 Digits Indirect (Two-touch) Memory
Notice Function up to 32 Digits
Standard Low-cost Crystal 3.58 MHz or Ceramic Resonator
Handset Mute (Privacy) with Optical Indication
Additional Toggle Flipflop
Internal Loop Interrupt Detection
Tone Ringer
2-tone Ringer
Adjustable Volume
RC Oscillator
Adjustable Threshold
Benefits
Low Number of External Components
High Quality through One IC Solution
Electrostatic sensitive device.
Observe precautions for handling.
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Universal
Telephone IC -
All Functions
Integrated
U3761MB-T
Description
Atmel’s low-voltage telephone circuit U3761MB-T performs all the speech and line
interface functions required in an electronic telephone set, a tone ringer, a pulse and
DTMF dialing with redial, notice function, and 13 memories. Operation below 15 mA is
possible with reduced performance.
Rev. 4744A–CORD–09/03


Atmel Electronic Components Datasheet

U3761MB-T Datasheet

Universal Telephone IC

No Preview Available !

Figure 1. Block Diagram
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Important note:
Application examples have not been examined for
series use or reliability, and no worst case scenarios
have been developed. Customers who adapt any of
these proposals must carry out their own testing and
be convinced that no negative consequences arise
from the proposals.
2 U3761MB-T
4744A–CORD–09/03


Part Number U3761MB-T
Description Universal Telephone IC
Maker ATMEL Corporation
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U3761MB-T Datasheet PDF






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