
4.25 Gbps,
16 × 16, Digital Crosspoint Switch
Data Sheet
Rev. A
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FEATURES
DC to 4.25 Gbps per port NRZ data rate
Programmable receive equalization
12 dB boost at 2 GHz
Compensates 40 inches of FR4 at 4.25 Gbps
Programmable transmit preemphasis/deemphasis
Up to 12 dB boost at 4.25 Gbps
Compensates 40 inches of FR4 at 4.25 Gbps
Low power: 130 mW per channel at 3.3 V (outputs enabled)
16 × 16, fully differential, nonblocking array
Double rank connection programming with dual
connection maps
Low jitter, typically 20 ps
Flexible I/O supply range
DC- or ac-coupled differential CML inputs
Programmable CML output levels
Per-lane input P/N pair inversion for routing ease
50 Ω on-chip I/O termination
Supports 8b/10b, scrambled or uncoded NRZ data
Serial (I2C slave or SPI) control interface
100-lead TQFP, Pb-free package
APPLICATIONS
Fiber optic network switching
High speed serial backplane routing to OC-48 with FEC
XAUI: 10GBASE-KX4
Gigabit Ethernet over backplane: 1000BASE-KX
1×, 2×, and 4× Fibre Channel
InfiniBand
Digital video (HDMI, DVI, DisplayPort, 3G-/HD-/SD-SDI)
Data storage networks
FUNCTIONAL BLOCK DIAGRAM
EQ
RX
TX
PRE-
EMPHASIS
16 × 16
SWITCH
MATRIX
CONNECTION
MAP 0
CONNECTION
MAP 1
SERIAL
INTERFACE
CONTROL
LOGIC
PER-PORT
OUTPUT
LEVEL
SETTINGS
OUTPUT
LEVEL
HOOKUP
TABLE
ADN4604
VCC
VEE
DVCC
OP[15:0]
VTTON,
VTTOS
ON[15:0]
IP[15:0]
VTTIE,
VTTIW
IN[15:0]
I2C/SPI
ADDR1/SDI
SDA/SDO
SCL/SCK
RESET
UPDATE
ADDR0/CS
07934-
001
Figure 1.
GENERAL DESCRIPTION
The ADN4604 is a 16 × 16 asynchronous, protocol agnostic,
digital crosspoint switch, with 16 differential PECL-/CML-
compatible inputs and 16 differential CML outputs.
The ADN4604 is optimized for nonreturn-to-zero (NRZ) sig-
naling with data rates of up to 4.25 Gbps per port. Each port
offers a fixed level of input equalization and programmable
output swing and output preemphasis.
The ADN4604 nonblocking switch core implements a 16 × 16
crossbar and supports independent channel switching through
the serial control interface. The ADN4604 has low latency and
very low channel-to-channel skew.
An I2C or SPI interface is used to control the device and pro-
vide access to advanced features, such as additional levels of
preemphasis and output disable.
The ADN4604 is packaged in a 100-lead TQFP package and
operates from 40°C to +85°C.