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U3761MB-TのメーカーはATMEL Corporationです、この部品の機能は「Universal Telephone IC」です。 |
部品番号 | U3761MB-T |
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部品説明 | Universal Telephone IC | ||
メーカ | ATMEL Corporation | ||
ロゴ | |||
このページの下部にプレビューとU3761MB-Tダウンロード(pdfファイル)リンクがあります。 Total 27 pages
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
1 Page Pin Configuration
Figure 2. Pinning SSO44
4744A–CORD–09/03
C1 1
44 R4
C2 2
43 R3
C3 3
42 R2
C4 4
41 R1
Earth 5
40 Mask
HFI 6
39 DP
HFO 7
38 MODE
XT 8
XT 9
U3761MB-T
37 KT
36 HKS
MFO 10
MFIND 11
35 NC
34 TEST
GND 12
33 VDD
MIC 1 13
32 OUT
MIC 2 14
MICO 15
VL 16
31 RCK
30 VRING
29 VRIAC
RDC 17
28 AGC
TIN 18
VI 19
MUTE 20
27 THA
26 ST
25 CLIM
PRIND 21
24 RECO 1
RECIN 22
23 RECO 2
U3761MB-T
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3
3Pages Pin Description
Pin Symbol Function
15
MICO
Transmit pre-amp output which is normally capacitively
coupled to Pin TIN
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Configuration
MICO
VI
1V
16K
PD
16
VL
Positive supply voltage input to the device. The current
through this pin is modulated by the transmit signal.
VL
RDC
16 V
PD
PD
An external resistor (1 W) is required from this pin to GND to
control the DC input impedance of the circuit. It has a
17
RDC
nominal value of 39 W for low-voltage operation. Values up
to 100 W may be used to increase the available transmit
AGC
output voltage swing at the expense of low-voltage
operation.
RDC
VL
PD
PD
18
TIN
Input to the line output driver amplifier. Transmit AGC
applied to this stage.
This internal voltage bias line must be connected to VL via
19
VI
an external resistor which dominates the AC input
impedance of the circuit and should be 680 W for an 600-W
input impedance or 1.2 kW for a 900-W input impedance.
5.6K
TIN
16 V
PD
1V
VI
16 V
PD
6 U3761MB-T
4744A–CORD–09/03
6 Page | |||
ページ | 合計 : 27 ページ | ||
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PDF ダウンロード | [ U3761MB-T データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
U3761MB-AFN | Low Voltage Standard Telephone Circuit with 13 Memories | TEMIC Semiconductors |
U3761MB-AFNG3 | Low Voltage Standard Telephone Circuit with 13 Memories | TEMIC Semiconductors |
U3761MB-ASD | Low Voltage Standard Telephone Circuit with 13 Memories | TEMIC Semiconductors |
U3761MB-T | Universal Telephone IC | ATMEL Corporation |