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參數(shù)資料
| 型號(hào)： | W6690 |
| 廠(chǎng)商： | WINBOND ELECTRONICS CORP |
| 英文描述： | ISDN S/T Interface Controller(ISDN S/T接口控制器) |
| 中文描述： | 綜合業(yè)務(wù)數(shù)字網(wǎng)的S / T接口控制器（綜合業(yè)務(wù)數(shù)字網(wǎng)S / T的接口控制器） |
| 文件頁(yè)數(shù)： | 16/76頁(yè) |
| 文件大小： | 471K |
| 代理商： | W6690 |
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Preliminary W6690
- 16 -
The transmitter and receiver are implemented by differential circuits to increase signal to noise ratio
(SNR). The nominal differential line pulse amplitude at 100
termination is 750 mV, zero to peak.
Transformers with 2:1 turn ration are needed at transmitter and receiver for voltage level translation
and DC isolation.
To meet the electrical characteristic requirements in I.430, some additional circuits are needed. At the
transmitter side, the external resistors (22 to 47
) are used to adjust the output pulse amplitude and
to meet the transmitter active impedance (
≥
20
when transmitting binary zeros). At the receiver
side, the 1.8 k
resistors protect the device inputs, while the 10 k
resistors (1.8 k
+8.2 k
) limit
the peak current in impedance tests. The diode bridge is used for overvoltage protection.
Figure 7.3 External Transmitter Circuitry
Figure 7.4 External Receiver Circuitry
After hardware reset, the receiver may enter power down state to save power. In thist state, the
internal clocks are turned off, but the analog level detector is still active to detect signal coming from
the S interface. The power down state is left either by non-INFO 0 signal from S interface or C/I
command from micro-processor.
SX1
SX2
22-47
22-47
GND
ο
V
DD
2:1
100
SR1
SR2
1.8k
1.8k
GND
ο
V
DD
8.2k
8.2k
2:1
100
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| W66910CD | TE Mode ISDN S/T-Controller with Microprocessor Interface |
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| W6691CD | ISDN S/T Interface Transceiver |
| W6691CP | ISDN S/T Interface Transceiver |
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相關(guān)代理商/技術(shù)參數(shù) |
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| W6690ASX-1 | 制造商:Magnecraft 功能描述:Relay SSR 280V AC-IN 90A 660V AC-OUT 4-Pin |
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| W6691 | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:ISDN S/T Interface Transceiver |
| W66910 | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述: |
| W66910CD | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:TE Mode ISDN S/T-Controller with Microprocessor Interface |
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