參數(shù)資料
型號: DS26334GNA3+
廠商: Maxim Integrated Products
文件頁數(shù): 49/121頁
文件大?。?/td> 0K
描述: IC LIU E1/T1/J1 3.3V 256-CSBGA
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 90
類型: 線路接口裝置(LIU)
驅(qū)動器/接收器數(shù): 16/16
規(guī)程: IEEE 1149.1
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 256-LBGA,CSBGA
供應(yīng)商設(shè)備封裝: 256-CSBGA(17x17)
包裝: 托盤
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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