Document
19-2192; Rev 0; 10/01
Dual-Rate Fibre Channel Repeaters
General Description
The MAX3772–MAX3775 are dual-rate (1.0625Gbps and 2.125Gbps) fibre channel repeaters. They are optimized for use in fibre channel arbitrated loop applications and operate from a +3.3V supply. The MAX3772–MAX3775 exceed fibre channel jitter tolerance requirements and can recover data signals with up to 0.7 unit interval (UI) jitter. The circuit’s fully integrated phase-locked loop (PLL) provides a frequency lock indication and does not need an external reference clock. These repeaters provide low-jitter CML clock and data outputs, and are pin compatible with the MAX3770 repeater (except RATESEL pin and exposed paddle). The MAX3773/MAX3774 can also be used for impedance transformation between 100Ω (differential) and 150Ω (differential) systems. To reduce the number of external components, all signal inputs and outputs are internally terminated. The MAX3772–MAX3775 are available in 16-pin QSOP-EP packages.
Features
o Pin Selectable 1.0625Gbps/2.125Gbps Dual-Rate Fibre Channel Operation o Exceeds Fibre Channel Jitter Tolerance Requirements o 1400mV Differential Output Swing o +3.0V to +3.6V Operation o No Reference Clock Required o Frequency Lock Indication o 290mW Power Consumption (MAX3775) at +3.3V o 100Ω/150Ω (differential) Input/Output Terminations
MAX3772–MAX3775
Ordering Information
PART MAX3772CEE MAX3773CEE MAX3774CEE MAX3775CEE TEMP. RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C PIN-PACKAGE 16 QSOP-EP 16 QSOP-EP 16 QSOP-EP 16 QSOP-EP
Applications
1.0625Gbps/2.125Gbps Dual-Rate Fibre Channel Fibre Channel Data Storage Systems Storage Area Networks Fibre Channel Hubs 100Ω/150Ω (Differential) Impedance Transformation
Pin Configuration appears at end of data sheet. Selector Guide appears at end of data sheet.
Typical Operating Circuits
0.047µF
LOUT+
LOCK
LIN-
LIN+
LOUT+
LINSEL
LOUT-
CLK+ CLK-
IN+
OUT+
Zo = 75Ω Zo = 75Ω
IN+ IN-
MAX3750
INVCC SEL OUTGND
MAX3775
RATESEL
OUT+ OUT-
Zo = 75Ω Zo = 75Ω
IN+
LOUT-
OUT+
MAX3750
INVCC OUTGND
CLKEN
3.3V 0.1µF
3.3V 0.1µF
GND
VCC
3.3V 0.1µF
PORT BYPASS CIRCUIT
FIBRE CHANNEL REPEATER
PORT BYPASS CIRCUIT
________________________________________________________________ Maxim Integrated Products
LIN+
CF+
CF-
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.
Dual-Rate Fibre Channel Repeaters MAX3772–MAX3775
ABSOLUTE MAXIMUM RATINGS
VCC ........................................................................-0.5V to +5.0V Pin Voltage Levels (IN±, CF±, RATESEL, CLKEN, LOCK) .....................-0.5V to (VCC + 0.5V) Current into LOCK...............................................-1mA to +10mA CML Output Currents (OUT±, CLK±), ROUT = 75Ω ........ +22mA CML Output Currents (OUT±, CLK±), ROUT = 50Ω ........ +33mA Continuous Power Dissipation (TA = +70°C) 16-Pin QSOP-EP (derate 18.9mW/°C abo.