參數(shù)資料
型號： IDT82P2521BH
廠商： IDT, Integrated Device Technology Inc
文件頁數(shù)： 116/147頁
文件大小： 0K
描述： IC LIU E1 21+1CH SHORT 640-PBGA
標(biāo)準(zhǔn)包裝： 5
類型： 線路接口裝置（LIU）
規(guī)程： E1
電源電壓： 3.135 V ~ 3.465 V
安裝類型： 表面貼裝
封裝/外殼： 640-BGA 裸露焊盤
供應(yīng)商設(shè)備封裝： 640-PBGA-EP（31x31）
包裝： 托盤
其它名稱： 82P2521BH
IDT82P2521
21(+1) CHANNEL HIGH-DENSITY E1 LINE INTERFACE UNIT
Miscellaneous
70
December 7, 2005
4.3
POWER UP
No power up sequencing for the VDD inputs (1.8 V and 3.3 V) has to
be provided for the IDT82P2521. A Power-on reset will be initiated
during power up. Refer to Section 4.1 Reset.
4.4
HITLESS PROTECTION SWITCHING (HPS) SUM-
MARY
In today’s telecommunication systems, ensuring no traffic loss is
becoming increasingly important. To combat these problems, redun-
dancy protection must be built into the systems carrying this traffic.
There are many types of redundancy protection schemes, including 1+1
and 1:1 hardware protection without the use of external relays. Refer to
Figure-44, Figure-45 and Figure-46 for different protection schemes.
The IDT82P2521 provides an enhanced architecture to support both
protection schemes.
IDT82P2521 highlights for HPS support:
Independent programmable receive and transmit high impedance
for Tip and Ring inputs and outputs to support 1+1 and 1:1 redun-
dancy
Fully integrated receive termination, required to support 1:1 redun-
dancy
Enhanced internal architecture to guarantee High Impedance for
Tip and Ring Inputs and Outputs during Power Off or Power Fail-
ure
Asynchronous hardware control (OE, RIM) for fast global high
impedance of receiver and transmitter (hot switching between
working and backup board)
Figure-44 1+1 HPS Scheme, Differential Interface (Shared Common Transformer)
1:2
Tx
LIU on primary line card
LIU on backup line card
backplane
interface card
1:1
Tx
Rx
120
OE
RIM
OE
RIM
Hot switch control
VDDTn
VDDTn
VDDRn
VDDRn
VDDTn
VDDTn
VDDRn
VDDRn
Rx:
Partially Internal Impedance Matching mode. A fixed external 120
resistor is placed on the backplane and provides a common termination for
E1 applications. The R_TERM[2:0] bits (b2~0, RCF0,...) setting is as follows: ‘010’ for E1 120
twisted pair cable and ‘011’ for E1 75 coaxial
cable.
Tx:
Internal Impedance Matching mode. The
T_TERM[2:0] bits (b2~0, TCF0,...) setting is as follows: ‘010’ for E1 120 twisted pair cable and
‘011’ for E1 75
coaxial cable.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IDT82P2521BHBLANK 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:21(1) Channel High-Density E1 Line Interface Unit
IDT82P2521BHG 功能描述:IC LIU E1 21+1CH SHORT 640-PBGA RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:收發(fā)器 驅(qū)動器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
IDT82P2521BHGBLANK 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:21(1) Channel High-Density E1 Line Interface Unit
IDT82P2808 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:8(+1) Channel High-Density T1/E1/J1 Line Interface Unit
IDT82P2808BB 功能描述:IC LIU T1/J1/E1 8+1CH 416-PBGA RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:收發(fā)器 驅(qū)動器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR)
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