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19-2258; Rev 0; 12/01
MAX3772-MAX3775 Evaluation Kits
General Description
The MAX3772-MAX3775 evaluation kits (EV kits) simplify evaluation of the MAX3772-MAX3775 Fibre Channel repeater ICs. These fully assembled and factory-tested EV kits enable testing of all the devices' functions. 50 SMA connectors and controlled-impedance transmission lines are provided for the differential data inputs and outputs, as well as the voltage-controlled oscillator (VCO) clock outputs. A test/calibration path enables the user to calibrate test equipment so accurate measurements can be taken. On-board 75 to 50 impedancetransformation networks simplify interfacing with standard 50 test equipment. Jumpers allow the user to enable or disable the repeater IC frequency lock indicator and the VCO's clock outputs. The VCO frequency lock can be monitored at the LOCK test point.
Features
o SMA Connectors for All High-Speed Inputs and Outputs o On-Board 75 to 50 Impedance-Conversion Networks o Jumpers for Controlling the Clock Output and Rate Select Function o Frequency Lock Indicator o Test Strip for Board Characterization o Fully Assembled and Tested
Evaluate: MAX3772-MAX3775
Ordering Information
PART MAX3772EVKI MAX3773EVKI MAX3774EVKI TEMP RANGE 0C to +70C 0C to +70C 0C to +70C 0C to +70C IC PACKAGE 16 QSOP-EP* 16 QSOP-EP* 16 QSOP-EP* 16 QSOP-EP*
Component Suppliers
SUPPLIER AVX Coilcraft Murata Venkel PHONE 843-946-0238 847-639-6400 770-436-1300 800-950-8365 FAX 843-626-3123 847-639-1469 770-436-3030 512-794-0087
MAX3775EVKI
Selector Guide
PART MAX3772EVKIT MAX3773EVKIT MAX3774EVKIT MAX3775EVKIT DIFFERENTIAL INPUT TERMINATION 100 150 100 150 DIFFERENTIAL OUTPUT TERMINATION 100 100 150 150
Note: Please indicate that you are using the MAX3772-MAX3775 when contacting these component suppliers.
MAX3772 Component List
DESIGNATION C1-C6, C8, C9, C12-C15 QTY 12 DESCRIPTION 0.1F 10% ceramic capacitors (0805) Murata GRM21BR71E104KA01C 0.047F 10% ceramic capacitor (0603) Murata GRM188R71E473KA01B 2.2F 10% ceramic capacitor (1206) Murata GRM31MR71C225KC11B DESIGNATION C11 J1-J6, J10-J13 J8, J9 L1 R1, R2, R4, R5, R7, R8, R11, R12, R14, R15 QTY 1 10 2 1 DESCRIPTION 33F tantalum capacitor AVX TAJC336K016R SMA connectors (edge mount) 3-pin headers (0.1in centers) 56nH inductor Coilcraft 0805HT-56NTKBC 0 resistors (0402)
C7
1
C10
1
10
________________________________________________________________ Maxim Integrated Products
1
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MAX3772-MAX3775 Evaluation Kits Evaluate: MAX3772-MAX3775
MAX3772 Component List (continued)
DESIGNATION R3, R6, R9, R13, R16 VCC, GND, J7 U1 None None None QTY 5 3 1 2 1 1 Open Test points MAX3772CEE 16-pin QSOP-EP Shunts for J8 and J9 MAX3772-MAX3775 data sheet MAX3772-MAX3775 EV kit circuit board, rev B C10 1 C7 1 DESCRIPTION
MAX3774 Component List
DESIGNATION C1-C6, C8, C9, C12-C15 QTY 12 DESCRIPTION 0.1F 10% ceramic capacitors (0805) Murata GRM21BR71E104KA01C 0.047F 10% ceramic capacitor (0603) Murata GRM188R71E473KA01B 2.2F 10% ceramic capacitor (1206) Murata GRM31MR71C225KC11B 33F tantalum capacitor AVX TAJC336K016R SMA connectors (edge mount) 3-pin headers (0.1in centers) 56nH inductor Coilcraft 0805HT-56NTKBC 0 resistors (0402) Open 43.2 1% resistors (0402) 178 1% resistors (0402) Test points MAX3774CEE 16-pin QSOP-EP Shunts for J8 and J9 MAX3772-MAX3775 data sheet MAX3772-MAX3775 EV kit circuit board, rev B
MAX3773 Component List
DESIGNATION C1-C6, C8, C9, C12-C15 QTY 12 DESCRIPTION 0.1F 10% ceramic capacitors (0805) Murata GRM21BR71E104KA01C 0.047F 10% ceramic capacitor (0603) Murata GRM188R71E473KA01B 2.2F 10% ceramic capacitor (1206) Murata GRM31MR71C225KC11B 33F tantalum capacitor AVX TAJC336K016R SMA connectors (edge mount) 3-pin headers (0.1in centers) 56nH inductor Coilcraft 0805HT-56NTKBC 43.2 1% resistors (0402) 178 1% resistor (0402) 0 resistors (0402)
C11 J1-J6, J10-J13 J8, J9 L1 R1, R2, R11, R12, R14, R15 R3, R13, R16 R4, R5, R7, R8 R6, R9 VCC, GND, J7 U1 None None None
1 10 2 1 6 3 4 2 3 1 2 1 1
C7
1
C10
1
C11 J1-J6, J10-J13 J8, J9 L1 R1, R2 R3 R4, R5, R7, R8, R11, R12, R14, R15 R6, R9, R13, R16 VCC, GND, J7 U1 None None None
1 10 2 1 2 1 8
MAX3775 Component List
DESIGNATION C1-C6, C8, C9, C12-C15 QTY 12 DESCRIPTION 0.1F 10% ceramic capacitors (0805) Murata GRM21BR71E104KA01C 0.047F 10% ceramic capacitor (0603) Murata GRM188R71E473KA01B 2.2F 10% ceramic capacitor (1206) Murata GRM31MR71C225KC11B
4 3 1 2 1 1
Open Test points MAX3773CEE 16-pin QSOP-EP Shunts for J8 and J9 MAX3772-MAX3775 data sheet MAX3772-MAX3775 EV kit circuit board, rev B
C7
1
C10
1
2
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MAX3772-MAX3775 Evaluation Kits
MAX3775 Component List (continued)
DESIGNATION C11 J1-J6, J10-J13 J8, J9 L1 R1, R2, R4, R5, R7, R8, R11, R12, R14, R15 R3, R6, R9, R13, R16 VCC, GND, J7 U1 None None None QTY 1 10 2 1 DESCRIPTION 33F tantalum capacitor AVX TAJC336K016R SMA connectors (edge mount) 3-pin headers (0.1in centers) 56nH inductor Coilcraft 0805HT-56NTKBC 43.2 1% resistors (0402)
4) Connect the data and the clock outputs (OUT+, OUT-, CLK+, and CLK-) through a 50 matchedimpedance cable to a 50 oscilloscope with a bandwidth of at least 3GHz. 5) Power up the EV kit with a 3.3V supply. The scope shows an output waveform for the MAX3772/ MAX3773 of approximately 1400mVP-P, while the MAX3774/MAX3775 shows approximately 600mVPP. Some high-speed sampling oscilloscopes are not capable of displaying input voltages of this magnitude. Use appropriate attenuators to ensure the waveforms are not visually distorted.
Evaluate: MAX3772-MAX3775
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Detailed Description
The MAX3772-MAX3775 EV kits simplify the evaluation of the MAX3772-MAX3775 Fibre Channel compliant repeaters. The EV kits operate from a single 3.3V power supply and come complete with all the external components necessary to interface with 50 test equipment.
5 3 1 2 1 1
178 1% resistors (0402) Test points MAX3775CEE 16-pin QSOP-EP Shunts for J8 and J9 MAX3772-MAX3775 data sheet MAX3772-MAX3775 EV kit circuit board, rev B
Connections
SMA connectors are provided for all high-speed inputs and outputs. All 75 inputs and outputs are AC-coupled through a 75 to 50 impedance-conversion network, while devices with 50 terminations are connected only through AC-coupling capacitors and 0 series resistors to the input SMAs. SMA connectors are also provided for the calibration test strip. Power-supply connections (VCC and ground) are provided through a 2-pin header. A test point is provided to monitor the frequency LOCK output. The control inputs (RATESEL and CLKEN, see Table 1) are connected to individual 3-pin headers that allow the selection of VCC or GND with a shunt.
Quick Start
1) Select the data rate with J8 (see Table 1). Shorting pins 2 and 3 connects RATESEL to VCC for 2.125Gbps operation. Shorting pins 1 and 2 connects RATESEL to GND for 1.0625Gbps operation. 2) Connect a differential signal source to the SMA connectors at IN+ and IN-. Set the differential signal amplitude to 500mVP-P. Set the input signal's data rate to 2.125Gbps or 1.0625Gbps, depending on the selected data rate. 3) Connect a shunt across pins 2 and 3 of J9 to connect CLKEN to VCC to enable the clock output. Shunt pins 1 and 2 to connect CLKEN to GND if no clock output is desired (see Table 1).
Control Functions
The MAX3772-MAX3775 EV kits are equipped with two 3-pin headers that allow the user to enable/disable the clock output, and select the data rate. Pin 1 is connected to ground for both headers, pin 2 is connected to the device's control inputs, and pin 3 is connected to VCC. See Table 1 for RATESEL and CLKEN selections.
Table 1. Controls and LOCK Indicator
HEADER J8 J9 NAME RATESEL CLKEN FUNCTION SHUNT POSITIONS 1 AND 2 1.0625Gbps operation Disable clock output at CLK (normal operating mode) SHUNT POSITIONS 2 AND 3 2.125Gbps operation Enable clock output at CLK (test mode)
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MAX3772-MAX3775 Evaluation Kits Evaluate: MAX3772-MAX3775
Input and Output Impedance Conversion
This Maxim family of dual-rate CDRs is designed to operate in 50, 75, and mixed impedance environments. Impedance-conversion networks are included on the MAX3773/MAX3774/MAX3775 EV kits for interfacing to standard 50 test equipment. An EV kit for a device with a 50 input and/or 50 outputs has the pads for an impedance-conversion network, but the pads are populated only with 0 series resistors to keep the impedance seen by test equipment to 50 (see Figures 1-4 for the MAX3772-MAX3775 schematics). The impedance-transformation networks introduce signal attenuation when converting from a 75 to a 50 environment. The input signal is attenuated by a factor of 0.64, and the output signal is attenuated by a factor of 0.43. For example, a 600mV differential signal applied to the input terminals of the MAX3775 EV kit will produce a 381mV differential input signal across the device's input pins. If a 600mV differential signal is observed at the output terminals of the MAX3775 EV kit, the device's actual output is a 1400mV differential signal.
Test/Calibration Circuit
The test/calibration signal path contains the same type of SMA connectors, transmission line layout, and
J7 LOCK
C7 0.047F 1 C1 0.1F J1 IN2 C2 0.1F J2 INR3 OPEN 2 R1 0 3 4 5 6 R2 0 7 8 CF+ CFGND IN+ INGND VCC VCC LOCK 16 15 14 13 12 11 10 9
R4 0
C3 0.1F J3 CLK+ C4 0.1F J4 CLK-
U1
CLK+ CLKCLKEN GND OUT+ OUTRATESEL
R6 R5 OPEN 0
MAX3772
R7 0
C5 0.1F J5 OUT+ C6 0.1F J6 OUT-
R9 R8 OPEN 0 J8 J9 CLKEN
RATESEL
L1 56nH VCC J14 GND C12 0.1F J10 TEST2+ R13 C13 OPEN 0.1F J11 TEST2C14 0.1F C11 33F C10 2.2F C9 0.1F C8 0.1F
R11 0
R14 0
J12 TEST1+ R16 OPEN C15 0.1F J13 TEST1-
R12 0
R15 0
Figure 1. MAX3772 EV Kit Schematic 4 _______________________________________________________________________________________
MAX3772-MAX3775 Evaluation Kits
impedance-transformation networks as provided for the data repeater IC's signal I/Os. The test/calibration circuit can be used for PC board characterization and jitter calibration.
Layout Considerations
The performance of these dual-rate repeaters can be greatly affected by circuit board layout and design. Use good high-frequency design technique; including minimizing ground inductances and using fixed-impedance transmission lines on the data and clock signals.
Evaluate: MAX3772-MAX3775
Lock Monitor
The MAX3772-MAX3775 EV kits are provided with a frequency lock test point. A logic-level low indicates that the phase-lock loop has lost lock to the incoming data frequency. A logic-level high indicates that the device is locked to the incoming data, or the input signal amplitude is below the phase-detector threshold and the VCO is free-running.
J7 LOCK C7 0.047F 1 C1 0.1F J1 IN2 C2 0.1F J2 IN2 R1 43.2 3 4 R3 178 5 6 R2 43.2 7 8 CF+ CFGND IN+ INGND VCC VCC LOCK 16 15 14 13 12 11 10 9 R7 0 C5 0.1F J5 OUT+ C6 0.1F J6 OUTR6 R5 OPEN 0 C4 0.1F J4 CLKR4 0 C3 0.1F J3 CLK+
U1
CLK+ CLKCLKEN GND OUT+ OUTRATESEL
MAX3773
R9 R8 OPEN 0 J8 J9 CLKEN
RATESEL
L1 56nH VCC J14 GND C12 0.1F J10 TEST2+ R13 C13 OPEN 0.1F J11 TEST2C14 0.1F C11 33F C10 2.2F C9 0.1F C8 0.1F
R11 0
R14 0
J12 TEST1+ R16 OPEN C15 0.1F J13 TEST1-
R12 0
R15 0
Figure 2. MAX3773 EV Kit Schematic _______________________________________________________________________________________ 5
MAX3772-MAX3775 Evaluation Kits Evaluate: MAX3772-MAX3775
J7 LOCK C7 0.047F 1 C1 0.1F J1 IN2 C2 0.1F J2 INR3 OPEN 2 R1 0 3 4 5 6 R2 0 7 8 CF+ CFGND IN+ INGND VCC VCC LOCK 16 15 14 13 12 11 10 9 R7 43.2 C5 0.1F J5 OUT+ R9 R8 178 43.2 J8 J9 CLKEN C8 0.1F C6 0.1F J6 OUTR6 R5 178 43.2 C4 0.1F J4 CLKR4 43.2 C3 0.1F J3 CLK+
U1
CLK+ CLKCLKEN GND OUT+ OUTRATESEL
MAX3774
RATESEL
L1 56nH VCC J14 GND C12 0.1F J10 TEST2+ R13 C13 OPEN 0.1F J11 TEST2C14 0.1F C11 33F C10 2.2F C9 0.1F
R11 0
R14 0
J12 TEST1+ R16 OPEN C15 0.1F J13 TEST1-
R12 0
R15 0
Figure 3. MAX3774 EV Kit Schematic
6
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MAX3772-MAX3775 Evaluation Kits Evaluate: MAX3772-MAX3775
J7 LOCK C7 0.047F 1 C1 0.1F J1 IN2 C2 0.1F J2 IN2 R1 43.2 3 4 R3 178 5 6 R2 43.2 7 8 CF+ CFGND IN+ INGND VCC VCC LOCK 16 15 14 13 12 11 10 9 R7 43.2 C5 0.1F J5 OUT+ R9 R8 178 43.2 J8 J9 CLKEN C8 0.1F C6 0.1F J6 OUTR6 R5 178 43.2 C4 0.1F J4 CLKR4 43.2 C3 0.1F J3 CLK+
U1
CLK+ CLKCLKEN GND OUT+ OUTRATESEL
MAX3775
RATESEL
L1 56nH VCC J14 GND C12 0.1F J10 TEST2+ R13 C13 178 0.1F J11 TEST2C14 0.1F C11 33F C10 2.2F C9 0.1F
R11 43.2
R14 43.2
J12 TEST1+ R16 178 C15 0.1F J13 TEST1-
R12 43.2
R15 43.2
Figure 4. MAX3775 EV Kit Schematic
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MAX3772-MAX3775 Evaluation Kits Evaluate: MAX3772-MAX3775
Figure 5. MAX3772-MAX3775 EV Kit Component Placement Guide--Component Side
8
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MAX3772-MAX3775 Evaluation Kits Evaluate: MAX3772-MAX3775
Figure 6. MAX3772-MAX3775 EV Kit PC Board Layout--Component Side
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MAX3772-MAX3775 Evaluation Kits Evaluate: MAX3772-MAX3775
Figure 7. MAX3772-MAX3775 EV Kit PC Board Layout--Solder Side
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MAX3772-MAX3775 Evaluation Kits Evaluate: MAX3772-MAX3775
Figure 8. MAX3772-MAX3775 EV Kit PC Board Layout--Ground Plane
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MAX3772-MAX3775 Evaluation Kits Evaluates: MAX3772-MAX3775
Figure 9. MAX3772-MAX3775 EV Kit PC Board Layout--Power Plane
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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