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U3761MB-T

Features: Speech Circuit• Adjustable DC Characteristic• Symmetrical Input of Microphone Amplifier• Receiving Amplifier for Dynamic or Piezo-electric Earpieces• Automatic Line-loss CompensationDialer• DTMF/Pulse Switchable• Pulse Dialing 66/33 or 60/40 or DTMF Di...

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SeekIC No. : 004534822 Detail

U3761MB-T: Features: Speech Circuit• Adjustable DC Characteristic• Symmetrical Input of Microphone Amplifier• Receiving Amplifier for Dynamic or Piezo-electric Earpieces• Automatic Line...

U3761MB-T Data Sheet

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Part Number:
U3761MB-T
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



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


Pinout

Connection Diagram


Specifications

Parameters
Symbol
Value
Unit
Line current
IL
140
mA
DC line voltage
VL
14
V
DC voltage at pins 1 to 11 and 33 to 44
VDC
5.5
V
Junction temperature
Tj
+125
°C
Ambient temperature
Tamb
25 to +75
°C
Storage temperature
Tstg
55 to +150
°C
Total power dissipation, Tamb = 60°C SSO44
Ptot
0.9
W
Junction ambient SSO44
RthJA
70
K/W

Note: ESD withstand voltage 1 kV according to ESD standard S5.1 (HBM)


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 of U3761MB-T below 15 mA is possible with reduced performance.




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