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MAX3785UTT fiches techniques PDF

Maxim Integrated - 6.25Gbps / 1.8V PC Board Equalizer

Numéro de référence MAX3785UTT
Description 6.25Gbps / 1.8V PC Board Equalizer
Fabricant Maxim Integrated 
Logo Maxim Integrated 





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MAX3785UTT fiche technique
19-2630; Rev 1; 8/03
6.25Gbps, 1.8V PC Board Equalizer
General Description
The MAX3785 6.25Gbps equalizer operates from a sin-
gle 1.8V supply and compensates for transmission-
medium losses encountered with FR4 transmission
lines. Optimized for low-voltage, high-density, DC-cou-
pled interconnections between the line card and switch
card, the MAX3785 enables a system upgrade path
while maintaining a legacy rate of 2.5Gbps to
3.125Gbps. Roughly the size of two 0603 passive com-
ponents, the MAX3785 easily provides placement and
routing flexibility.
The MAX3785 is comprised of an equalizer, limiting
amplifier, and output driver. For data rates of 3.2Gbps
and lower, the MAX3785 equalizes signals for spans up
to 40in of FR4 board material. For data rates up to
6.25Gbps, the MAX3785 compensates for 30in of FR4
board material. The MAX3785 is coding independent,
functioning equally well for 8b/10b or scrambled signals.
The MAX3785 features DC-coupled current-mode logic
(CML) data inputs and outputs. It is packaged in a tiny
1.5mm 1.5mm chip-scale package (USCP™) and a
6-pin TDFN package.
Applications
HSBI for 6.4Gbps
Double IEEE 802.3ae XAUI
Double STM-16/OC-48
UCSP is a trademark of Maxim Integrated Products, Inc.
Features
o Single 1.8V Supply
o Very Low Power, 60mW
o Spans 30in with FR4 at 6.25Gbps
o Operates from 1.0Gbps to 6.4Gbps
o Coding Independent, 8b/10b or Scrambled
o DC-Coupled CML Inputs and Outputs
o Small 1.5mm × 1.5mm Footprint
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
PACKAGE CODE
MAX3785UBL 0°C to +85°C 6 UCSP (3 × 3)
MAX3785UTT 0°C to +85°C 6 TDFN
T633-1
Pin Configuration
TOP VIEW (BUMPS ON BOTTOM OF DIE)
A1
IN-
A2 A3
GND OUT-
MAX3785UBL
C1 C2 C3
IN+ VCC OUT+
3 x 3 UCSP
IN- 1
6 IN+
GND 2 MAX3785UTT 5 VCC
OUT- 3
TDFN
4 OUT+
Typical Application Circuit
LINE CARD
BACKPLANE
SWITCH CARD
MAC
Rx Tx
Tx Rx
1.8V
VCC
OUT
MAX3785
IN
6.25Gbps
1.8V
VCC
IN MAX3785
OUT
30in (0.75m)
SWITCH
ASIC WITH
SERDES
Rx
Tx
________________________________________________________________ Maxim Integrated Products 1
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.

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