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參數(shù)資料
| 型號： | XRT5897 |
| 廠商： | Exar Corporation |
| 英文描述： | Seven-Channel E1 Line Interface (3.3V or 5.0V)(七通道E1 3.3V線接口單元) |
| 中文描述： | 七通道E1線路接口（3.3V或5.0V），（七通道素E1 3.3線接口單元） |
| 文件頁數(shù)： | 13/20頁 |
| 文件大?。?/td> | 959K |
| 代理商： | XRT5897 |
XRT5897
13
Rev. 1.10
Transmitters
This device contains four identical ITU G.703 compliant
transmitters. The output stage of each transmitter is a
differential voltage driver. External resistors need to be
connected to the primary of output transformer. This is
necessary to maintain an accurate source impedance
that ensures compliance to ETSI 300 166 return loss
requirement.
TTL compatible dual rail transmit data signals are
supplied to TXPOS and TXNEG inputs. The transmitter
differentialoutputs TTIP andTRING are connectedtothe
outputtransformerprimary throughseries 9.1
resistors.
All the four transmitters can be operated in two distinct
modes ofoperationreferredtoas “clocked”or“clockless”
modes. The operationalmode is selected automatically
basedonthe signalprovidedtoTXCLK input. Ifa clock is
present at this pin, the transmitter detects its presence
and operates in the clocked mode. In this mode, the
transmit input should be supplied with full-width NRZ
pulses. Ifa clock is notpresentatthe TXCLK input(pinis
leftopen), the partoperates inthe clockless mode. Inthis
mode, RZ data should be supplied to the device. Each
transmitchannelofXRT5897 has a duty cycle correction
circuitry.
This enables the device to produce output
bipolar pulses fully compliant with G.703 despite having
TXCLK signal with 30% to 70% duty cycle.
Figure 4. CCITT G.703 Pulse Template
20%
488 ns
(244 + 244)
219 ns
(244 -- 25)
0%
50%
V = 100%
269 ns
(244 + 25)
194 ns
(244 -- 50)
Nominal pulse
244 ns
10%
10%
10%
10%
10%
10%
20%
20%
Note:
V corresponds to the nominal peak value
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| XRT5897ES | 功能描述:外圍驅(qū)動器與原件 - PCI 7 CH E1 AFE RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XRT5897IV | 功能描述:外圍驅(qū)動器與原件 - PCI 7CH E1 LIU RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XRT5897IV-F | 功能描述:外圍驅(qū)動器與原件 - PCI 7 Ch.E1LIU3.3/5.5V RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XR-T5990CN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone/Pulse Telephone Dialer |
| XR-T5990CP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone/Pulse Telephone Dialer |
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