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參數(shù)資料
| 型號(hào)： | MT88E46AS |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Bellcore Compliant Calling Number Identification Circuit |
| 中文描述： | TELEPHONE CALLING NO IDENT CKT, PDSO20 |
| 封裝： | 0.300 INCH, MS-013AC, SOIC-20 |
| 文件頁數(shù)： | 4/23頁 |
| 文件大?。?/td> | 522K |
| 代理商： | MT88E46AS |
MT88E46
Advance Information
4
Control Bit (CB0/1/2) Functionality
Table 1. CB0/1/2 Function Table
The number of control bits (CB) required to interface the MT88E46 to the microcontroller depends on the
functionality of the application.
Table 2. Control Bit Functionality Groups
CB0 CB1 CB2
FSK
Interface
Input
Op-Amp
Function
0/1
1
1
Set by CB0
GS1
FSK Demodulation.
DR/DET pin is the DR signal.
0/1
1
0
Set by CB0
GS2
‘Off hook mode’ CAS Detection.
The off hook mode algorithm is Bellcore talkoff and talkdown compliant
when near end speech level is attenuated 8dB or better. It should be used
for the off hook state CPE.
DR/DET pin is the DET signal.
0/1
0
1
Set by CB0
GS1
‘On hook mode’ CAS Detection.
When the line is in use, a TIA Multiple Extension Interworking (MEI)
compatible Type 2 CPE must be able to detect CAS even though the CPE
itself is on hook. Since in most telephone designs the hybrid or speech IC
is not operational when the CPE itself is on hook, this mode provides Tip
Ring CAS detection for the on hook state MEI CPE.
DR/DET pin is the DET signal.
The on hook mode algorithm is optimized for talkdown only and typically
meets talkdown condition 1 (the average case) without near end speech
attenuation. It must not be used when the CPE itself is off hook. See ‘On
Hook Mode CAS Detection’ section in ‘Functional Description’.
1
0
0
Mode 1
-
Power Down.
The MT88E46 is disabled and draws virtually no power supply current.
Note that the DCLK pin becomes an input pin because FSK interface
mode 1 is selected by CB0=1.
DR/DET pin is logic high.
0
0
0
Mode 0
-
Reserved for factory testing.
Functionality Group
Controls
Description
FSK,
Off Hook mode CAS
(Non MEI compatible)
CB2
CB0 is connected to Vdd or Vss to select the FSK interface mode.
CB1 connected to Vdd.
The microcontroller uses CB2 to select between the 2 functions.
FSK,
Off Hook mode CAS,
On Hook mode CAS
CB1
CB2
CB0 is connected to Vdd or Vss to select the FSK interface mode.
The microcontroller uses CB1 and CB2 to select between the 3
functions.
FSK (Interface mode 1),
Off Hook mode CAS,
On Hook mode CAS,
Power Down
CB1
CB2
CB0 is connected to Vdd to select FSK interface mode 1.
The microcontroller uses CB1 and CB2 to select between the 4
functions.
FSK (Interface mode 0),
Off Hook mode CAS,
On Hook mode CAS,
Power Down
CB0
CB1
CB2
All 3 pins are required.
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| MT88EBNR | 4-Wire Calling Number Identification Circuit 2 (4-Wire CNIC2) |
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相關(guān)代理商/技術(shù)參數(shù) |
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| MT88E46AS1 | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 20SOIC - Rail/Tube |
| MT88E46ASR | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 20SOIC - Tape and Reel |
| MT88E46ASR1 | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 20SOIC - Tape and Reel |
| MT88EBNR | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:4-Wire Calling Number Identification Circuit 2 (4-Wire CNIC2) |
| MT88L70 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:3 Volt Integrated DTMF Receiver |
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