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Intel - T1/E1/J1 N+1 Protection Interface Unit

Numéro de référence LXT3008
Description T1/E1/J1 N+1 Protection Interface Unit
Fabricant Intel 
Logo Intel 





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LXT3008 fiche technique
LXetT43U0.c0o8mT1/E1/J1 N+1 Protection Interface Unit
She Preliminary Datasheet
ta The Intel® Protection Interface Unit (Intel® PIU), LXT3008, is a multiplexing element to be used
a in lieu of relays for more reliable and faster switching in a protection environment. It
.D incorporates eight receivers and eight drivers in a single 160 ball PBGA package. The PIU is
w used in an N+1 redundancy scheme for Short Haul (SH) applications. It is used in conjunction
w with the Intel® LXT38x family of Line Interface Units (LIUs).
w Each PIU contains eight three-state drivers and high impedance receivers. On the analog side,
mthese devices interface to the primary T1/E1 bus and can either drive it or stay in a non-intrusive,
high impedance state. On the digital side, the PIU provides recovered clock and data and also
oaccepts transmit input clock and data. The receive output clock and data signals can be tri-stated.
Therefore, multiple PIU elements can be connected in parallel.
.cIntel PIUs are controlled by hardware and therefore require no dedicated microprocessor. A 1x
reference clock (1.544 MHz for T1 and 2.048 MHz for E1) is required for clock recovery. A
single reference clock can feed all the PIUs in a protection matrix. Both the output analog drivers
Uand the receive clock and data digital buffers can be tri-stated. PIUs also include three line build-
out inputs (LEN0-2) for T1 DSX applications.
t4For further information on N+1 Protection, please see Application Note: N+1 Protection
Without Relays Using Intel® Protection Interface Units (Intel® PIUs) - Intel® LXT3008 for T1/
eE1/J1 (Order Number 249532).
es LOS per ITU G.775, ETS 300 233 and
hT1.231
s 4 wire serial control interface
Ss Hardware or serial host control mode
taLXT3008 Block Diagram
s JTAG Boundary Scan test port per IEEE
1149.1
s 160 ball PBGA package
s Tri-stateable analog and digital short haul
interface
aANALOG
.D DRIVER
x8
DIGITAL TX
INTERFACE
ww ANALOG
mRECEIVER
w ox8
et4U.cHARDWARE OR
eSERIAL CONTROL
www.DataShINTERFACE
DIGITAL RX
INTERFACE
TIMING
Order Number: 249531-003
June 2001

PagesPages 30
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