MAX3784 Datasheet, PDF (1/7 Pages) Maxim Integrated Products – 5Gbps PCB Equalizer

19-2565; Rev 4; 10/07
5Gbps PCB Equalizer
General Description
The MAX3784/MAX3784A 5Gbps equalizers provide
compensation for transmission-medium losses in up to
40in of FR-4. They are optimized for short-run length
and balanced codes such as 8b10b, as found in multi-
plexed 1.25Gbps Ethernet systems and 4.25Gbps
Fibre Channel.
The equalizers use differential CML data inputs and
outputs. A standby mode reduces power consumption
when the parts are not in use. The MAX3784/
MAX3784A are available in a 4mm × 4mm, 16-pin QFN
package that consumes only 185mW at +3.3V.
Features
♦ Spans 40in (1m) of FR-4 PCB
♦ 0.18UI Deterministic Jitter Up to 40in
♦ Low Power Consumption: 185mW (MAX3784)
♦ Equalization Reduces Intersymbol Interference
♦ Single +3.3V Supply
♦ Standby Mode
♦ Small 4mm × 4mm, 16-Pin QFN Package
Pin Configurations
TOP VIEW
12
11
10
9
EN 13
8 N.C.
N.C. 14
N.C. ₁₅
MAX3784/
MAX3784A
7 V_CC
6 GND
N.C. 16
*EP
5 N.C.
1
2
3
4
QFN
* THE EXPOSED PAD MUST BE SOLDERED TO SUPPLY GROUND
FOR CORRECT THERMAL AND ELECTRICAL PERFORMANCE.
Pin Configurations continued at end of data sheet.
Applications
Chassis Life Extension
4.25Gbps Fibre Channel
4x Multiplexed 1.25Gbps Ethernet (5Gbps)
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
MAX3784UGE 0°C to +85°C 16 QFN-EP*
MAX3784UTE+ 0°C to +85°C 16 TQFN-EP*
MAX3784AUGE 0°C to +85°C 16 QFN-EP*
MAX3784AUTE+ 0°C to +85°C 16 TQFN-EP*
+Denotes a lead-free package.
*Exposed pad.
PKG
CODE
G1644-1
T1644-3
G1644-1
T1644-3
Typical Application Circuit
LINE CARD
PCB
BACKPLANE
SWITCH CARD
1.25Gbps
Rx
T/R 1
Tx
1.25Gbps
Rx
Tx ^{T/R 2}
1.25Gbps
Rx
Tx ^{T/R 3}
1.25Gbps
Rx
T/R 4
Tx
T/R 1
Tx
T/R 2
T/R 3
Rx
T/R 4
+3.3V
OUT ^MAX3784/ IN
MAX3784A
EQUALIZER
5Gbps
+3.3V
IN
MAX3784/
MAX3784A
OUT
EQUALIZER
SWITCH
Rx
Tx
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.