ADN4600 Datasheet, PDF (1/28 Pages) Analog Devices – 4.25 Gbps, 8 × 8, Asynchronous Crosspoint Switch

4.25 Gbps, 8 × 8,
Asynchronous Crosspoint Switch
ADN4600
FEATURES
Full 8 × 8 crossbar connectivity
Fully buffered signal path supports multicast and broadcast
operation
Optimized for dc to 4.25 Gbps data
Programmable receive equalization
Compensates for up to 30 in. of FR4 @ 4.25 Gbps
Programmable transmit pre-emphasis/de-emphasis
Compensates for up to 30 in. of FR4 @ 4.25 Gbps
Flexible 1.8 V to 3.3 V core supply
Per lane positive/negative (P/N) pair inversion for routing ease
Low power: 125 mW/channel at 4.25 Gbps
DC- or ac-coupled differential CML inputs
Programmable CML output levels
50 Ω on-chip termination
−40°C to +85°C temperature range operation
Supports 8b10b, scrambled or uncoded nonreturn-to-zero
(NRZ) data
I²C control interface
Package: 64-lead LFCSP
APPLICATIONS
1×, 2×, 4× FibreChannel
XAUI
Gigabit Ethernet over backplane
10GBase-CX4
InfiniBand®
50 Ω cables
GENERAL DESCRIPTION
The ADN4600 is an asynchronous, nonblocking crosspoint
switch with eight differential PECL-/CML-compatible inputs
with programmable equalization and eight differential CML
outputs with programmable output levels and pre-emphasis or
de-emphasis. The operation of this device is optimized for NRZ
data at rates up to 4.25 Gbps.
The receive inputs provide programmable equalization with
nine settings to compensate for up to 30 in. of FR4 and
programmable pre-emphasis with seven settings to compensate
for up to 30 in. of FR4 at 4.25 Gbps.
IP[7:0]
IN[7:0]
FUNCTIONAL BLOCK DIAGRAM
RECEIVE
EQUALIZATION
CROSSPOINT
ARRAY
ADN4600
TRANSMIT
PRE-EMPHASIS
EQ
PE
OP[7:0]
ON[7:0]
ADDR[1:0]
SCL
SDA
RESETB
CONTROL LOGIC
Figure 1.
The ADN4600 nonblocking switch core implements an 8 × 8
crossbar and supports independent channel switching through the
I²C control interface. Every channel implements an asynchronous
path supporting NRZ data rates from dc to 4.25 Gbps. Each
channel is fully independent of other channels. The ADN4600
has low latency and very low channel-to-channel skew.
The main application for the ADN4600 is to support switching
on the backplane, line card, or cable interface sides of serial links.
The ADN4600 is packaged in a 9 mm × 9 mm, 64-lead LFCSP
package and operates from −40°C to +85°C.
Rev. 0
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