Preliminary
PM8620 NSE-20G
20G Narrowband Switch Element
OVERVIEW
The PM8620 NSE-20G is a monolithic
CMOS integrated circuit that performs
DS0 and above granularity Space (cross
bar ) switching on 32 full duplex STS-12
streams.
The device provides 20Gb/s (258,048
DS0s, 10,752 T1s/VT1.5s, 8064
E1s/VT2s, 384 DS3s/E3s) switching.
The NSE-20G can be combined in appli-
cations with the PM5372 TSE and
PM5310 TBS devices from the PMC
CHESS™ product family and with the
PM8610 SBS and PM8611 SBSLITE.
•
E1, VT1.5, VT2, DS3 and E3
tributaries.
The NSE-20G can be used with the
companion SBS devices to implement
a switch fabric scaleable to 20Gb/s.
In TelecomBus, switches VT1.5, VT2,
or STS-1 tributaries.
Supports switching of arbitrary non-
standard octet aggregates.
Supports unicast, multicast, and
broadcast for all switching modes.
Supports full-duplex, in-band
communication channels from the NSE
to each SBS or SBSLITE device.
These channels can be used to
initialize and control the SBS's for
fabric monitoring and maintenance.
Supports "1+1" or "1:n" fabric
redundancy in conjunction with the
SBS™ or SBSLITE™ devices.
Supports two sets of switch settings
and a controlled method of changing
settings on STS-12 frame boundaries.
PHYSICAL CHARACTERISTICS
• Supports an IEEE P1149.1 JTAG test
port.
• Provides 32-bit microprocessor bus
interface for configuration, control and
status monitoring.
• Low power 1.8 V / 3.3 V 0.18
µm
CMOS technology.
• Available in a high density 480 ball
35 mm x 35 mm UBGA.
• -40°C to +85°C Industrial temperature
Operation.
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APPLICATIONS
• T1/E1 SONET/SDH Cross-connects.
• T1/E1 SONET/SDH Add-Drop
Multiplexors.
• OC-48 Multiservice Access
Multiplexors.
• Channelized OC-12/OC-48 Any
Service Any Port Switches.
• Voice Gateways.
FEATURES
• Supports 32 STS-12 equivalent serial
ports via 777.6MHz, 8B/10B encoded
LVDS links. Each port can be either
Serial TelecomBus or Serial SBI336S.
• In SBI mode, switches DS0 or NxDS0
for all T1 and E1 tributaries and
aggregate columns for switching T1,
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•
BLOCK DIAGRAM
RP[0]
RN[0]
LVDS Receiver, Data Recovery Unit,
Receive Decoder and In-Band Link
Controller
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•
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LVDS Transmitter, Transmit
Serializer, Transmit Encoder and
In-Band Link Controller
TP[0]
TN[0]
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RP[31]
RN[31]
•
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LVDS Receiver, Data Recovery Unit,
Receive Decoder and In-Band Link
Controller
•
•
•
LVDS Transmitter, Transmit
Serializer, Transmit Encoder and
In-Band Link Controller
•
•
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TP[31]
TN[31]
•
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•
DSO Crossbar Switch
(DCB)
RC1FP
CMP
SYSCLK
Clock
Synthesis
Units (2)
Tx ReF
Microprocessor
Interface
JTAG
PMC-2000171 (P4)
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
© Copyright PMC-Sierra, Inc. 2001.
PMC [ PMC-SIERRA, INC ]
