参数资料
型号: XRT83L34IVTR
厂商: Exar Corporation
文件页数: 20/99页
文件大小: 0K
描述: IC LIU T1/E1/J1 QUAD 128TQFP
标准包装: 750
类型: 线路接口装置(LIU)
驱动器/接收器数: 4/4
规程: T1,E1,J1
电源电压: 3.135 V ~ 3.465 V
安装类型: 表面贴装
封装/外壳: 128-LQFP
供应商设备封装: 128-TQFP(14x20)
包装: 带卷 (TR)
xr
XRT83L34
QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR REV. 1.0.1
24
TERSEL0
TERSEL1
113
112
I
Termination Impedance Select pin 0
Termination Impedance Select pin 1
In the Hardware mode and in the internal termination mode (TXTSEL=”1”
and RXTSEL=”1”), TERSEL[1:0] control the transmit and receive termination
impedance according to the following table.
In the internal termination mode, the receiver termination of each receiver
is realized completely by internal resistors or by the combination of internal
and one fixed external resistor (see description of RXRES[1:0] pins).
In the internal termination mode the transformer ratio of 1:2 and 1:1 is
required for transmitter and receiver respectively with the transmitter output
AC coupled to the transformer.
NOTES:
1.
This pin is internally pulled "Low" with a 50k
resistor.
2.
In Hardware Mode all channels share the same TERSEL control
function.
ICT
120
I
In-Circuit Testing (active "Low"):
When this pin is tied “Low”, all output pins are forced to a “High” impedance
state for in-circuit testing.
Pulling RESET and ICT pins “Low” simultaneously will put the chip in factory
test mode. For normal operation, the user should either leave this input pin
"floating" or pull it to a logic "HIGH" level.
NOTE: Internally pulled “High” with a 50k
resistor.
SIGNAL NAME
PIN #TYPE
DESCRIPTION
0
1
0
1
0
100
110
75
120
Termination
TERSEL1
TERSEL0
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