Rainbow Electronics MAX3805 - Manual

General Description
The MAX3805 is designed to provide up to 30in
(0.75m) reach on 6-mil differential FR-4 transmission
line, or up to 24ft (8m) on RG-188A/U type coaxial
cable, for PRBS data from 9.95Gbps to 10.7Gbps. The
MAX3805 adaptive equalizer reduces intersymbol inter-
ference, resulting in 20ps residual jitter after equaliza-
tion. An internal feedback network controls the
equalizer to automatically match frequency-dependent
skin effect and dielectric losses. The MAX3805 pro-
vides LVCMOS-compatible output-enable and signal-
detect functions.
The MAX3805 has separate supply connections for the
internal logic and I/O circuits. This allows the current-
mode logic (CML) input and CML output to be connect-
ed to isolated supplies for independent DC-coupled
interfaces to 1.8V, 2.5V, or 3.3V ICs. The MAX3805
comes in a very small 3mm x 3mm package and con-
sumes only 135mW.
Applications
OC-192, 10GbE Switches and Routers
OC-192, 10GbE Serial Modules
High-Speed Signal Distribution
Features
♦ 3mm x 3mm Package
♦ Spans 30in (0.75m) of 6-mil FR-4
♦ Spans 24ft (8m) of Coax
♦ Automatic Receive Equalization to Reduce ISI
Caused by Path Losses
♦ Up to 10.7Gbps NRZ Data Operating Range
♦ Signal-Detect Output
♦ Output-Enable Control
♦ 135mW Power Consumption
♦ DC-Coupled Input and Output to Terminations as
Low as 1.65V
♦ Differential or Single-Ended Operation
♦ +3.3V Core Power Supply
MAX3805
10.7Gbps Adaptive Receive Equalizer
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2936; Rev 0; 7/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PART TEMP RANGE
PIN-
PACKAGE PACKAGE
CODE
MAX3805ETE -40 °C to +85°C 16 Thin QFN T1633F-3
MAX3805
Tx
Rx
10Gbps
CDR/SERDES
10Gbps
SWITCH
FR-4 STRIPLINE
FR-4 STRIPLINE
SDI
2
2
V CC1 V CC V CC2
SDO
+3.3V
2.5V
2
Rx
Tx
1.8V
2
SDI
V CC1
V CC
V CC2
SDO
2
1.8V
2 2
+3.3V
PC BOARD BACKPLANE
2
2.5V
SD EN
SD EN
MAX3805
LINE CARD SWITCH CARD
Typical Operating Circuit
Pin Configuration appears at end of data sheet.