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參數資料
| 型號： | MT88E43B |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Extended Voltage Calling Number Identification Circuit (ECNIC)(擴展電壓主叫識別電路（接收傳送的物理層信號）) |
| 中文描述： | 擴展電壓主叫號碼識別電路（ECNIC）（擴展電壓主叫識別電路（接收傳送的物理層信號）） |
| 文件頁數： | 9/27頁 |
| 文件大?。?/td> | 180K |
| 代理商： | MT88E43B |
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Preliminary Information
MT88E43B
61
The MT88E43B is powered down by setting the
PWDN pin to logic high. In power down mode, the
oscillator, input opamp and all internal circuitry are
disabled except for TRIGin, TRIGRC and TRIGout
pins. These three pins are not affected by power
down, such that, the MT88E43B can still react to call
arrival indicators. The MT88E43B can be powered
up by setting the PWDN pin to logic low.
Crystal Oscillator
The MT88E43B requires a 3.579545MHz crystal
oscillator as the master timing source.
Figure 8 - Common Crystal Connection
The crystal specification is as follows (e.g. CTS
MP036S) :
Frequency:
Frequency tolerance:
Resonance mode:
Load capacitance:
Maximum series resistance: 150 ohms
Maximum drive level (mW):
3.579545 MHz
±
0.1%(-40
o
C+85
o
C)
Parallel
18 pF
2 mW
Any number of MT88E43B devices can be connected
as shown in Figure 8 such that only one crystal is
required. The connection between OSC2 and OSC1
can be DC coupled as shown, or the OSC1 input on
all devices can be driven from a CMOS buffer (dc
coupled) with the OSC2 outputs left unconnected.
To meet BT and Bellcore requirements for proper
tone detection the crystal must have a frequency
tolerance of 0.1%.
VRef and CAP Inputs
V
Ref
is the output of a low impedance voltage source
equal to V
DD
/2 and is used to bias the input opamp.
A 0.1
μ
F capacitor is required between CAP and V
SS
to eliminate noise on V
Ref.
OSC1
OSC2
OSC1
OSC2
OSC1
OSC2
3.579545 MHz
MT88E43B
MT88E43B
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MT88E43BE | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Extended Voltage Calling Number Identification Circuit 2 |
| MT88E43BS | 制造商:Microsemi Corporation 功能描述: |
| MT88E43BS1 | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 24SOIC - Rail/Tube 制造商:Microsemi Corporation 功能描述:CALLING NUMBER ID CIRCUIT 2 |
| MT88E43BSR | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Extended Voltage Calling Number Identification Circuit 2 |
| MT88E43BSR1 | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 24SOIC - Tape and Reel 制造商:Microsemi Corporation 功能描述:PB FREE CALLING NUMBER ID CIRCUIT 2 |
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