SY89329V - Electronic component Microchip - Free user manual and instructions

USER MANUAL SY89329V Microchip

The SY89329V evaluation board is designed for convenient setup and quick evaluation of the SY89329V. The boards are optimized to interface directly to a 50Ω oscilloscope.

The default evaluation board I/O configuration is AC-coupled. For applications that require a DC-coupled configuration, step-by-step instructions for modifying the board are included.

Data Sheets and Support documentation can be found on Micrel's website at www.micrel.com.

Features

• SY89329V
  • Single +3.3V or +5.0V power supply
  • AC-coupled configuration for ease-of-use
  • I/O interface includes on-board terminations
  • Fully assembled and tested
• Can be reconfigured for DC-coupled operation

Related Documentation

- SY89329V, 3.3V/5V 800MHz LVTTL/LVCMOS-to-DIFFERENTIAL LVPECL TRANSLATOR Data Sheet

Evaluation Board

MICREL SEMICONDUCTOR AC-COUPLED, Vcc = +3.3V, Vee = GND = 0V DC-COUPLED, Vcc = +2V, GND = 0V, Vee = -1.3V SMA1 R1 C1 R2 R3 C2 R4 SMA2 VCC R14 R15 VEE SMA3 R5 C3 R6 R7 C4 R8 SMA4 CSI-2391-00 J1 (J2) (GND) (VEE) +C11 C12 R13 C7 R17 R18 R16 C8 (VCC) C9 C10 R9 SMA7 R10 C5 R11 R12 C6 SMA6 SY89208U SY89222L SY89223L SY89311U SY89322V SY89323L SY89328L

Evaluation Board Description

AC-Coupled Evaluation Board: Direct 50Ω Scope Interface

The default configuration for the board is the AC-coupled configuration. The evaluation boards can be reconfigured in DC-coupled configuration; therefore the choice between two configurations offers flexibility for specific applications.

The AC-coupled configuration is suited to most customer applications and is preferred by the majority of users because of its ease-of-use. It requires only a single power supply of either 3.3V +10% or 5.0V +10% and offers the most flexibility in interfacing to a variety of signal sources.

DC-Coupled Evaluation Board

For DC-coupled operation, the board can be modified to interface directly to a PECL input on another device.

Step-by-step instructions for modifying an AC-coupled evaluation board for DC-coupled operation are supplied in the "Modifying your AC-Coupled Board for DC-Coupled Operation" section.

Evaluation Board

Vcc = 3.3V/5.0V SMA2 C2 NC G /Q NC 1 8 Vcc D NC 6 GND R14 180Ω R15 180Ω R17 50Ω SMA7 GND = 0V

SY89329V AC-Coupled Evaluation Board

AC-Coupled Evaluation Board Power Supply Connections
Power Supply	V_CC	GND	V_EE	I/O
3.3 Volt System	+3.3V	0V	0V	AC-Coupled Input/AC-Coupled Output
5.0 Volt System	+5.0V	0V	0V	AC-Coupled Input/AC-Coupled Output

Table 1: SY89329V AC-Coupled Configuration

AC-Coupled Evaluation Board Setup

Setting up the Evaluation Board

The following steps describe the procedure for setting up the evaluation board:

1. Set the voltage setting for a DC supply to 3.3V or 5.0V and turn off the supply.
2. Connect the GND terminal to the negative side of a DC power supply. This is the 0V ground potential.
3. Connect the V_cc terminal to the positive side of a DC power supply
4. Turn on the power supply and verify that the power supply current is <100mA.

5. Turn off the power supply.

6. Using a single-ended signal source set the V_OL = 0.4V and V_OH = 2.4V . Turn off or disable the outputs of the signal source.

7. Using a 50Ω impedance coaxial cable, connect the signal source to the input on the evaluation board (SMA7).
8. Using equal length 50Ω impedance coaxial cables, connect the outputs of the evaluation board (SMA2 and SMA3) to the oscilloscope or other measurement device that has an internal 50Ω termination.
9. Turn on the power and verify the current is <100mA.
10. Enable the signal source and monitor the outputs.

Bill of Material

AC-Coupled Evaluation Board

Item	Part Number	Manufacturer	Description	Qty.
C2, C3	VJ0402Y104KXXAT	Vishay^(1)	0.1μF, 25V, 10% Ceramic Capacitor, Size 0402, X7R Dielectric	4
C7, C8	VJ0402Y103KXXAT	Vishay^(1)	0.01μF, 25V, 10% Ceramic Capacitor, Size 0402, X7R Dielectric	2
C5	CRCW04020R00F	Vishay^(1)	Replace capacitor with 0Ω, 1/16W, 5% Thick-film Resistor, Size 0402	1
C9	293D685X0010	Vishay^(1)	6.8μF, 20V, Tantalum Electrolytic Capacitor, Size C	1
C10	VJ1206Y103JXJAT	Vishay^(1)	0.01μF, 25V, 10% Ceramic Capacitor, Size 0805	2
R14, R15	CRCW04021820F	Vishay^(1)	182Ω, 1/16W, 5% Thick-film Resistor, Size 0402	2
R17	CRCW040249R9F	Vishay^(1)	49.9Ω, 1/16W, 5% Thick-film Resistor, Size 0402	2
J1	111-0703-001	Johnson Components^(2)	Black Banana Jack	1
J3	111-0702-001	Johnson Components^(2)	Red Banana Jack	1
SMA2, SMA3, SMA7	142-0701-851	Johnson Components^(2)	Jack Assembly End Launch SMA	5
U1	SY89329V	Micrel^(3)	LVTTL/LVCMOS-to-Differential LVPECL Translator	1

Notes:

1. Vishay: www.vishay.com
2. Johnson Components: www.johnsoncomponents.com
3. Micrel: www.micrel.com

Evaluation Board Layout

PC Board Layout

The evaluation boards are constructed with Rogers 4003 material and are coplanar in design and fabricated to minimize noise, achieve high bandwidth and minimize crosstalk.

Layer	SY89329V
L1	GND and Signal
L2	Impedance GND
L3	V_CC and V_EE
L4	GND and Signal

Table 2: Layer Stack

Modifying AC-Coupled Outputs for DC-Coupled Operation

When DC-Coupling is Necessary

For applications where AC-coupling is not appropriate, the board can be reconfigured for DC-coupled operation. An example where DC-coupling is required is if the outputs will not be monitored by a scope with a 50Ω termination to ground, but will be driving another device with LVPECL inputs. The LVPECL inputs of the destination device must be terminated with the normal PECL load of 50Ω to V _cc -2V.

Reconfiguring an AC-Coupled Board into a DC-Coupled Board

The following procedure details the steps for converting an AC-coupled board to a DC-coupled board:

1. Remove resistors R14 and R15.
2. Replace capacitors C2 and C3 with 0Ω resistors.
3. For easy identification, remove the solder dot from the via adjacent to the AC-Coupled silkscreen label on the front of the board and add a solder dot to the DC-Coupled via.

Setting up the DC-Coupled Evaluation Board

The follow steps describe the procedure for setting up the DC-coupled evaluation board.

1. Set the voltage setting for a DC supply to 3.3V or 5.0V and turn off the supply.
2. Connect the GND terminal to the negative side of a DC power supply. This is the 0V ground potential.
3. Connect the V_cc terminal to the positive side of a DC power supply
4. Turn on the power supply and verify that the power supply current is < 100mA.
5. Turn off the power supply.
6. Using a single-ended signal source set the V_OL = 0.4V and V_OH = 2.4V . Turn off or disable the outputs of the signal source.
7. Using a 50Ω impedance coaxial cable, connect the signal source to the input on the evaluation board (SMA7).
8. Using equal length 50Ω impedance coaxial cables, connect the outputs of the evaluation board (SMA2 and SMA3) to the destination device that has the 50Ω termination to Vcc-2V.
9. Turn on the power and verify the current is <100mA.

Bill of Material

Additional Bill of Materials for DC-Coupled Evaluation Board

Item	Part Number	Manufacturer	Description	Qty.
C2, C3	CRCW0402000Z	Vishay(1)	Replace capacitors with resistors: 0Ω, 1/16W, 5% Thick-film Resistor, Size 0402.	2

Notes:

1. Vishay: www.vishay.com

Micrel Cross Reference

To find an equivalent Micrel part, go to Micrel's website at: http://www.micrel.com and following the steps below.

1. Click on Dynamic Cross Reference
2. Enter competitor's part number in the Dynamic Cross Reference field
3. To download a PDF version of this information, click on the Cross Reference PDF tab

HBW Support

Hotline: [phone]

Email Support: [e-mail]

Application Hints and Notes

For application notes on high speed termination on PECL and LVPECL products, clock synthesizer products, SONET jitter measurement, and other High Bandwidth product go to Micrel's website at http://www.micrel.com/. Once in Micrel's website, follow the steps below:

1. Click on "Product Info".
2. In the Applications Information Box, choose "Application Hints and Application Notes."

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