參數(shù)資料
型號： XRT75R03IVTR-F
廠商： Exar Corporation
文件頁數(shù)： 9/92頁
文件大小： 0K
描述： IC LIU E3/DS3/STS-1 3CH 128LQFP
標準包裝： 750
類型： 線路接口裝置（LIU）
驅(qū)動器/接收器數(shù)： 3/3
規(guī)程： DS3，E3，STS-1
電源電壓： 3.135 V ~ 3.465 V
安裝類型： 表面貼裝
封裝/外殼： 128-LQFP
供應(yīng)商設(shè)備封裝： 128-LQFP（14x20）
包裝： 帶卷 (TR)
xr
XRT75R03
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
REV. 1.0.8
14
66
RxClkINV/
CS
I
Receive Clock Invert Input - Chip Selectl:
In Hardware Mode is pin is used to configure the Receive Sections of the three
(3) channels in the XRT75R03 to either output the recovered data via the
RPOS_n or RNEG_n/LCV_n output pins upon either the rising or falling edge of
the RCLK_n clock output signal.
"Low" - Configures each of the Receive Sections to output the recovered data
via the RPOS_n and RNEG_n/LCV_n output pins upon the rising edge of the
RCLK_n output clock signal.
"High" - Configures each of the Receive Sections to output the recovered data
via the RPOS_n and RNEG_n/LCV_n output pins upon the falling edge of the
RCLK_n output clock signal.
NOTES:
1.
This input pin will function as the CS (Chip Select Input pin) of the
Microprocessor Serial Interface when the XRT75R03 has been
configured to operate in the Host Mode.
2.
This configuration setting applies globally to all three (3) of the
channels within the XRT75R03.
3.
If the Receive Sections are configured to operate in the Single-Rail
Mode, then the LCV_n output pin will be updated on the user-selected
edge of the RCLK_n signal, per this configuration selection.
106
SFM_EN
I
Single Frequency Mode Enable:
This input pin is used to configure the XRT75R03 to operate in the SFM (Single
Frequency) Mode.
When this feature is invoked the Single-Frequency Mode Synthesizer will
become active. By applying a 12.288MHz clock signal to pin 109, STS-1CLK/
12M the XRT75R03 will, depending upon which mode the user has configured
each of the three channels, generate all of the appropriate clock signals (e.g.,
34.368MHz, 44.736MHz or 51.84. Further, the XRT75R03 internal circuitry will
route each of these synthesized clock signals to the appropriate nodes of the
corresponding three channels in the XRT75R03.
"Low" - Disables the Single Frequency Mode. In this configuration setting, the
user is required to supply to the E3CLK, DS3CLK or STS-1CLK input pins all of
the relevant clock signals that are to be used within the chip.
"High" - Enables the Single-Frequency Mode. A 12.288MHz clock signal MUST
be applied to pin 109 (STS-1CLK/12M).
NOTE: This input pin is internally pulled low.
SYSTEM-SIDE RECEIVE OUTPUT AND RECEIVE CONTROL PINS
PIN #
SIGNAL NAME
TYPE
DESCRIPTION
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