参数资料
型号: XRT83VSH28IB
厂商: Exar Corporation
文件页数: 2/75页
文件大小: 0K
描述: IC LIU SH E1 OCTAL 225BGA
标准包装: 84
类型: 线路接口装置(LIU)
驱动器/接收器数: 8/8
规程: T1,E1,J1
电源电压: 3.14 V ~ 3.47 V
安装类型: 表面贴装
封装/外壳: 225-BGA
供应商设备封装: 225-BGA(19x19)
包装: 托盘
XRT83VSH28
7
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
REV. 2.0.0
RXRES1
RXRES0
R10
V10
I
Receive External Resistor Control Pins
Hardware mode Only
These pins are used in the Receive Internal Impedance mode for unique applica-
tions where an accurate resistor can be used to achieve optimal return loss. When
RxRES[1:0] are used, the LIU automatically sets the internal impedance to match
the line build out. For example: if 240
is selected, the LIU chooses an internal
impedance such that the parallel combination equals the impedance chosen by
TERSEL[1:0].
"00" = No External Fixed Resistor
"01" = 320
"10" = 280
"11" = 190
NOTE: These pins are internally pulled “Low” with a 50k
resistor. This feature is
available in Host mode by programming the appropriate channel register.
RCLKE/
PTS1
J16
I
Receive Clock Edge
Hardware Mode
This pin is used to select which edge of the recovered clock is used to update data to
the receiver on the RPOS/RNEG outputs. By default, data is updated on the risinge
edge. To udpdate data on the falling edge, this pin must be pulled "High".
Host Mode
PTS[2:1] pins are used to select the type of microprocessor to be used for Host
communication.
"00" = 8051 Intel Asynchronous
"01" = 68K Motorola Asynchronous
"10" = Power PC 403
"11" = MPC8xx Power PC Synchronous
NOTE: This pin is internally pulled “Low” with a 50k
resistor.
SIGNAL NAME
BGA
LEAD #
TYPE
DESCRIPTION
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