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參數資料
| 型號： | MT88E41AE |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | CMOS Extended Voltage Calling Number Identification Circuit (ECNIC) |
| 中文描述： | TELEPHONE CALLING NO IDENT CKT, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁數： | 7/16頁 |
| 文件大?。?/td> | 888K |
| 代理商： | MT88E41AE |
MT88E41
Data Sheet
SEMICMF.019
6
1.4
Carrier Detect
The presence of the FSK signal is indicated by a logic low at the carrier detect (CD) output. This output has built in
hysteresis to prevent toggling when the received signal is shortly interrupted. Note that the CD
output is also
activated by voice since these frequencies are in the input frequency detection band of the device. The user may
choose to ignore this output when FSK data is not expected, or force the ECNIC into its powerdown mode.
Figure 5 - Common Crystal Connection
1.5
Crystal Oscillator
The ECNIC uses a crystal oscillator as the master timing source for filters and the FSK demodulator. The crystal
specification is as follows:
Frequency:
Frequency tolerance:
Resonance mode:
Load capacitance:
Maximum series resistance:
Maximum drive level (mW):
e.g. CTS MP036S
3.579545 MHz
±
0.1%(-40
°
C+85
°
C)
Parallel
18 pF
150 ohms
2 mW
A number of MT88E41 devices can be connected as shown in Figure 5 such that only one crystal is required. The
connection between OSC2 and OSC1 can be D.C. coupled as shown, or A.C. coupled using 30pF capacitors.
Alternatively, the OSC1 inputs on all devices can be driven from a CMOS buffer (dc coupled) with the OSC2 outputs
left unconnected.
1.6
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 op-amp. A 0.1
μ
F
capacitor is required between CAP and V
SS
to suppress noise on V
Ref.
OSC1
OSC2
OSC1
OSC2
OSC1
OSC2
3.579545 MHz
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相關PDF資料 |
PDF描述 |
|---|---|
| MT88E41AN | CMOS Extended Voltage Calling Number Identification Circuit (ECNIC) |
| MT88E41AS | CMOS Extended Voltage Calling Number Identification Circuit (ECNIC) |
| MT88E43 | Extended Voltage Calling Number Identification Circuit 2 |
| MT88E43AE | Extended Voltage Calling Number Identification Circuit 2 |
| MT88E43AS | Extended Voltage Calling Number Identification Circuit 2 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MT88E41AN | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:CMOS Extended Voltage Calling Number Identification Circuit (ECNIC) |
| MT88E41AS | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:CMOS Extended Voltage Calling Number Identification Circuit (ECNIC) |
| MT88E43 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Extended Voltage Calling Number Identification Circuit 2 |
| MT88E43AE | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Extended Voltage Calling Number Identification Circuit 2 |
| MT88E43AS | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Extended Voltage Calling Number Identification Circuit 2 |
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