参数资料
| 型号： | XRT73LC03AIV-F |
| 厂商： | Exar Corporation |
| 文件页数： | 19/61页 |
| 文件大小： | 0K |
| 描述： | IC LIU E3/DS3/STS-1 3CH 120LQFP |
| 标准包装： | 72 |
| 类型： | 线路接口装置（LIU） |
| 驱动器/接收器数： | 3/3 |
| 规程： | DS3，E3，STS-1 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 120-LQFP |
| 供应商设备封装： | 120-LQFP（14x20） |
| 包装： | 托盘 |
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XRT73LC03A
24
3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
REV. 1.0.4
SYSTEM DESCRIPTION
A functional block diagram of the XRT73LC03A E3/
DS3/STS-1 Transceiver IC is presented in Figure 13.
The XRT73LC03A contains three separate channels
with three distinct sections:
The Transmit Section - Channels 0, 1 and 2
The Receive Section - Channels 0, 1 and 2
The Microprocessor Serial Interface Section
THE TRANSMIT SECTION - CHANNELS 0, 1 AND 2
The Transmit Section, within each Channel, accepts
TTL/CMOS level signals from the Terminal Equip-
ment in either a Single-Rail or Dual-Rail format. The
Transmit Section then takes this data and does the
following:
Encode this data into the B3ZS format if the DS3 or
SONET STS-1 Modes has been selected or into
the HDB3 format if the E3 Mode has been selected.
Convert the CMOS level B3ZS or HDB3 encoded
data into pulses with shapes that are compliant with
the various industry standard pulse template
requirements.
Drive these pulses onto the line via the TTIP_(n)
and TRing_(n) output pins across a 1:1 Trans-
former.
NOTE: The Transmit Section drives a "1" (or a Mark) onto
the line by driving either a positive or negative polarity pulse
across the 1:1 Transformer within a given bit period. The
Transmit Section drives a "0" (or a Space) onto the line by
driving no pulse onto the line.
THE RECEIVE SECTION - CHANNELS 0, 1 AND 2
The Receive Section, within each Channel, receives
a bipolar signal from the line via the RTIP and RRing
signals through a 1:1 Transformer or 0.01F Capaci-
tor.
The recovered clock and data outputs to the Local
Terminal Equipment in the form of CMOS level sig-
nals via the RPOS_(n), RNEG_(n) and RxClk_(n)
output pins.
THE MICROPROCESSOR SERIAL INTERFACE
The XRT73LC03A can be configured to operate in ei-
ther the Hardware Mode or the HOST Mode.
The XRT73LC03A contains three identical channels.
The Microprocessor Interface Inputs are common to
all channels. The descriptions that follow refer to
Channel(n) where (n) represents channel 0, 1 or 2.
a. Operating in the Hardware Mode
When the XRT73LC03A is operating in the Hardware
Mode, then the following is true:
1. The Microprocessor Serial Interface block is dis-
abled.
2. The XRT73LC03A is configured via input pin set-
tings.
The XRT73LC03A can be configured to operate in
the Hardware Mode by tying the HOST/(HW) input
pin to GND.
Each of the pins associated with the Microprocessor
Serial Interface takes on their alternative role as de-
fined inTable 1.
When the XRT73LC03A is operating in the Hardware
Mode, all of the remaining input pins become active.
b. Operating in the HOST Mode
The XRT73LC03A can be configured to operate in
the HOST Mode by tying the HOST/(HW) input pin to
VDD.
When the XRT73LC03A is operating in the HOST
Mode, then the following is true.
1. The Microprocessor Serial Interface block is
enabled. Writing the appropriate data into the on-
chip Command Registers makes many configura-
tion selections.
2. All of the following input pins are disabled and
should be connected to ground:
Pins 8, 9 & 35 - TxLEV_(n)
Pins 6, 7 & 36 - TAOS_(n)
Pin 74, 82 & 100 - REQEN_(n)
Pin 69, 77 & 87 - RLB_(n)
Pin 68, 76 & 88 - LLB_(n)
Pin 92 & 102 - E3_(n)
Pin 65, 95 & 101 - STS1/DS3_(n)
In HOST Mode Operation, the TxOFF_(n) input pins
can be used to turn on or turn off the Transmit Output
Drivers within all Channels concurrently. The intent
behind this feature is to permit a system designed for
TABLE 1: ROLE OF MICROPROCESSOR SERIAL
INTERFACE PINS WHEN THE XRT73LC03A IS
OPERATING IN THE
HARDWARE MODE
PIN #PIN NAME
FUNCTION, WHILE IN
HARDWARE MODE
61
CS/(ENDECDIS)
ENDECDIS
62
SClk/(RxOFF_1)
RxOFF_1
63
SDI/(RxOFF_0)
RxOFF_0
64
SDO/(E3_0)
E3_0
96
REGR/(RxClkINV)
RxClkINV
相关PDF资料 |
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| XRT73LC04AIV-F | IC LIU E3/DS3/STS-1 4CH 144LQFP |
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| XRT73R12IB-L | IC LIU E3/DS3/STS-1 12CH 420TBGA |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XRT73LC04A | 制造商:EXAR 制造商全称:EXAR 功能描述:4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| XRT73LC04A_08 | 制造商:EXAR 制造商全称:EXAR 功能描述:4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| XRT73LC04AES | 功能描述:网络控制器与处理器 IC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| XRT73LC04AIV | 功能描述:外围驱动器与原件 - PCI RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| XRT73LC04AIV-F | 功能描述:外围驱动器与原件 - PCI 4-Ch DS3, E3, STS-1 RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
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