参数资料
型号: DS26334GNA3+
厂商: Maxim Integrated Products
文件页数: 49/121页
文件大小: 0K
描述: IC LIU E1/T1/J1 3.3V 256-CSBGA
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 90
类型: 线路接口装置(LIU)
驱动器/接收器数: 16/16
规程: IEEE 1149.1
电源电压: 3.135 V ~ 3.465 V
安装类型: 表面贴装
封装/外壳: 256-LBGA,CSBGA
供应商设备封装: 256-CSBGA(17x17)
包装: 托盘
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
33 of 121
5.8.2
Digital Loopback
The transmit system data TPOS, TNEG, and TCLK will be looped back to output on RCLK, RPOS, and RNEG. The
data input at TPOS and TNEG is output on TTIP and TRING. All ones can also be output when selected by the
Transmit All Ones Enable Register (TAOE). Signals at RTIP and RRING will be ignored. This loopback is
conceptually shown in Figure 5-11.
Figure 5-11. Digital Loopback
Line
Driver
H D B 3/
B 8Z S
E n c o der
O pt i ona l
J it t e r
A t t e nu at or
T r a n s m it
D i gi t al
T r ans m i t
A na l og
TCLK
TPOS
TNEG
H D B 3 /
B 8Z S
D e c o d er
O pt i onal
J it t e r
A t t e nuat or
R e c e i v e
D i g i t al
R e c e i v e
A na l og
RCLK
RPOS
RNEG
RTIP
RRING
TPOS
TNEG
5.8.3
Remote Loopback
The inputs at RTIP and RRING are looped back to TTIP and TRING. The inputs at TCLK, TPOS, and TNEG are
ignored during a remote loopback. This loopback is conceptually shown in Figure 5-12.
Note: Remote loopback does not take precedence over transmit power-down and requires TCLK to operate. The
transmitters will use the recovered RCLK in remote loopback. TCLK is still required because if it is removed the
transmitters will power-down (TCLK held low) or transmit all ones (TCLK held high).
Figure 5-12. Remote Loopback
Line
Driver
H D B 3/
B 8Z S
E n c o der
O pt i ona l
J it t e r
A t t e nu at or
T r a n s m it
D i gi t al
T r ans m i t
A na l og
TCLK
TPOS
TNEG
H D B 3 /
B 8Z S
D e c o d e r
O pt i onal
J it t e r
A t t e nuat or
R e c e i v e
D i g i t al
R e c ei v e
A na l og
RCLK
RPOS
RNEG
RTIP
RRING
TPOS
TNEG
TTIP
TRING
TTIP
TRING
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