GS2988-INTE3 [GENNUM]

Dual-Slew-Rate, Cable Driver with 3Gb/s Capability;
GS2988-INTE3
型号: GS2988-INTE3
厂家: GENNUM CORPORATION    GENNUM CORPORATION
描述:

Dual-Slew-Rate, Cable Driver with 3Gb/s Capability

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GS2988 Dual-Slew-Rate, Cable Driver with 3Gb/s Capability  
Features  
Description  
SMPTE 424M, SMPTE 292M and SMPTE 259M  
The GS2988 is a high-speed BiCMOS integrated circuit  
designed to drive one to two 75Ω coaxial cables.  
compliant  
Supports DVB-ASI at 270Mb/s  
Supports data rates from 270Mb/s to 2.97Gb/s  
Wide common-mode range input buffer  
The GS2988 may drive data rates up to 2.97Gb/s and  
provides two selectable slew rates in order to achieve  
compliance to SMPTE 424M, SMPTE 292M and SMPTE  
259M.  
Š
100mV sensitivity  
The GS2988 accepts industry-standard differential input  
levels including LVPECL and CML.  
Š
supports DC-coupling to industry-standard  
differential logic  
Input trace equalization compensates for up to 10 inches of  
FR4 trace loss while in HD and 3G modes. This feature can  
be disabled using the EQ_EN pin.  
Š
on-chip 100Ω differential data input termination  
Input signal trace equalization  
The DISABLE pin powers-down the entire device.  
Differential coaxial-cable-driving output  
The GS2988 features adjustable output swing using an  
external bias resistor. The single-ended output swing is  
adjustable from 500mVpp to 1800mVpp.  
Š
selectable slew rates  
Š
adjustable output swing from 500mVpp to  
1800mVpp  
An output signal presence function, the OSP pin, indicates  
whether an active signal is present at the output of the  
GS2988.  
Š
DISABLE control  
Robust output signal presence function  
Excellent output eye quality  
The GS2988 can be powered from either a 3.3V or a 2.5V  
supply. Power consumption is typically 110mW using a  
2.5V power supply.  
Power supply operation at 3.3V or 2.5V  
110mW power consumption (2.5V supply)  
Operating temperature range: -40°C to +85°C  
Small footprint QFN package (4mm x 4mm)  
The GS2988 is Pb-free, and the encapsulation compound  
does not contain halogenated flame retardant.  
This component and all homogeneous subcomponents are  
RoHS compliant.  
Š
Drop-in compatible to the GS2978  
Pb-free and RoHS compliant  
Applications  
SMPTE 424M, SMPTE 292M and SMPTE 259M coaxial  
cable serial digital interfaces  
GS2988 Dual-Slew-Rate, Cable Driver with 3Gb/s  
Capability  
Data Sheet  
1 of 17  
www.gennum.com  
52131 - 4  
December 2010  
EQ_EN  
SD/HD  
DISABLE  
DDI  
DDI  
SDO  
SDO  
Slew Rate  
Control  
Equalizer  
Output  
Signal  
OSP  
Presence  
Band Gap Reference  
&
Output Control  
RSET  
Functional Block Diagram  
Revision History  
Version  
ECR  
PCN  
Date  
Changes and/or Modifications  
4
3
155552  
155359  
December 2010  
November 2010  
Corrected the Marking Diagram.  
Clarified the functionality of the EQ_EN pin in Table  
1-1: Pin Descriptions and throughout the document.  
2
1
0
155070  
153602  
153455  
October 2010  
February 2010  
January 2010  
Updated Typical Application Circuit.  
Converted document to Data Sheet.  
Converted document to Preliminary Data Sheet.  
Changed Additive jitter numbers in Table 2-2: AC  
Electrical Characteristics.  
B
152690  
151623  
October 2009  
April 2009  
Updates to Section 2. Electrical Characteristics.  
Corrections to Section 3. Input/Output Circuits.  
A
New document.  
GS2988 Dual-Slew-Rate, Cable Driver with 3Gb/s  
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Capability  
Data Sheet  
52131 - 4  
December 2010  
Contents  
Features.................................................................................................................................................................1  
Applications.........................................................................................................................................................1  
Description...........................................................................................................................................................1  
Revision History .................................................................................................................................................2  
1. Pin Out...............................................................................................................................................................4  
1.1 Pin Assignment ..................................................................................................................................4  
1.2 Pin Descriptions ................................................................................................................................4  
2. Electrical Characteristics ............................................................................................................................5  
2.1 Absolute Maximum Ratings ..........................................................................................................5  
2.2 DC Electrical Characteristics ........................................................................................................6  
2.3 AC Electrical Characteristics ........................................................................................................7  
3. Input/Output Circuits ..................................................................................................................................8  
4. Detailed Description.....................................................................................................................................9  
4.1 Serial Data Input ...............................................................................................................................9  
4.2 Input Trace-equalization ................................................................................................................9  
4.3 Serial Data Output ............................................................................................................................9  
4.3.1 Slew Rate Selection (Rise/Fall Time Requirement)....................................................9  
4.4 Output Disable ................................................................................................................................ 10  
4.5 Output Signal Presence Indicator (OSP) ................................................................................. 10  
4.6 Output Amplitude (RSET) ........................................................................................................... 10  
4.7 Output Return Loss Measurement ........................................................................................... 12  
5. Application Information .......................................................................................................................... 13  
5.1 PCB Layout ....................................................................................................................................... 13  
5.2 Typical Application Circuit ........................................................................................................ 13  
6. Package & Ordering Information .......................................................................................................... 14  
6.1 Package Dimensions ..................................................................................................................... 14  
6.2 Recommended PCB Footprint ................................................................................................... 15  
6.3 Packaging Data ............................................................................................................................... 15  
6.4 Solder Reflow Profiles .................................................................................................................. 16  
6.5 Marking Diagram ........................................................................................................................... 16  
6.6 Ordering Information ................................................................................................................... 17  
GS2988 Dual-Slew-Rate, Cable Driver with 3Gb/s  
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Capability  
Data Sheet  
52131 - 4  
December 2010  
1. Pin Out  
1.1 Pin Assignment  
16  
15  
14  
13  
12  
11  
10  
9
1
DDI  
SDO  
GS2988  
16-pin QFN  
(top view)  
2
DDI  
SDO  
3
SD/HD  
VEE  
4
VCC  
RSET  
5
6
7
8
Ground Pad  
(bottom of package)  
Figure 1-1: 16-Pin QFN  
1.2 Pin Descriptions  
Table 1-1: Pin Descriptions  
Pin Number  
Name  
Type  
Description  
1, 2  
3
DDI, DDI  
VEE  
Input  
Serial data differential input.  
Power  
Most negative power supply connection for the input buffer and core.  
Connect to GND.  
4
RSET  
N/C  
Input  
External output amplitude control resistor connection.  
5, 7, 8, 13, 15  
No Connect.  
These pins are not connected internally.  
6
9
DISABLE  
Input  
Control signal input.  
When set LOW, the entire device is powered-down.  
When set HIGH, the SDO/SDO pins will output a serial data signal.  
NOTE: if this pin is left floating, the serial data output will be enabled.  
VCC  
Power  
Most positive power supply connection.  
Connect to 3.3V or 2.5V.  
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Capability  
Data Sheet  
52131 - 4  
December 2010  
Table 1-1: Pin Descriptions  
Pin Number  
Name  
Type  
Description  
10  
SD/HD  
Input  
Control signal input.  
When set HIGH, the serial data output will meet the SMPTE 259M rise/fall time  
specification.  
When set LOW, the serial output will meet the SMPTE 292M and SMPTE 424M rise/fall  
time specification.  
NOTE: if this pin is left floating, the serial data output will meet the SMPTE 259M  
rise/fall time specification.  
11, 12  
14  
SDO/  
SDO  
Output  
Output  
Serial data differential output.  
OSP  
Output signal presence status signal output.  
Signal levels are LVCMOS/LVTTL compatible.  
Indicates presence of a valid output signal.  
When the OSP pin is LOW, a good input signal has been detected within the output  
stage pre-driver.  
When this pin is HIGH, the output signal is invalid at the output of the pre-driver.  
16  
EQ_EN  
Input  
Control signal input.  
When set LOW, trace-equalization is turned ON.  
When set HIGH, trace-equalization is turned OFF.  
NOTE 1: if this pin is left floating, trace-equalization is turned OFF.  
NOTE 2: this pin must be pulled HIGH or left floating for operation in SD mode.  
Center Pad  
Power  
Connect to most negative power supply plane following the recommendations in  
Recommended PCB Footprint on page 15.  
2. Electrical Characteristics  
2.1 Absolute Maximum Ratings  
Parameter  
Value  
Supply Voltage  
-0.5V to 3.6 V  
2.5kV  
DC  
Input ESD Voltage  
Storage Temperature Range  
-50°C < T < 125°C  
s
Input Voltage Range (any input)  
-0.3 to (V +0.3)V  
CC  
Operating Temperature Range  
Solder Reflow Temperature  
-40°C to +85°C  
260°C  
NOTE: Absolute Maximum Ratings are those values beyond which damage to the device may  
occur. Functional operation under these conditions or at any other condition beyond those  
indicated in the AC/DC Electrical Characteristic sections is not implied.  
GS2988 Dual-Slew-Rate, Cable Driver with 3Gb/s  
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Capability  
Data Sheet  
52131 - 4  
December 2010  
2.2 DC Electrical Characteristics  
Table 2-1: DC Electrical Characteristics  
V
= 3.3V 5ꢀ or 2.5V 5ꢀ; T = -40°C to +85°C, unless otherwise shown  
A
CC  
Parameter  
Symbol Conditions  
Min  
Typ  
Max  
Units  
Notes  
Supply Voltage  
V
3.3V Typical  
3.135  
3.3  
2.5  
110  
3
3.465  
2.625  
130  
5
V
1
1
1
1
1
1
1
CC  
2.5V Typical  
2.375  
V
Power Consumption  
(2.5V)  
P
SDO/SDO enabled  
SDO/SDO disabled  
SDO/SDO enabled  
SDO/SDO disabled  
VCC = 3.3V  
mW  
mW  
mW  
mW  
mA  
mA  
mA  
V
D
Power Consumption  
(3.3V)  
155  
4
183  
6
Supply Current  
I
47  
44  
1
53  
S
VCC = 2.5V  
50  
Power-down  
1.8  
Output Voltage  
Input Voltage  
V
Common mode  
V
- V  
CMOUT  
TERM OUT  
V
Common mode  
1.4 + ΔV /2  
V
- ΔV /2  
V
V
CMIN  
DDI  
CC  
DDI  
SD/HD, DISABLE,  
EQ_EN Input  
V
I
I
<= 150μA  
<= 150μA  
1.7  
0.8  
IH  
IH  
IL  
V
V
IL  
OSP Drive Strength  
2
mA  
NOTES:  
1. Power consumed in GS2988 only. Termination resistors draw extra current.  
GS2988 Dual-Slew-Rate, Cable Driver with 3Gb/s  
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Capability  
Data Sheet  
52131 - 4  
December 2010  
2.3 AC Electrical Characteristics  
Table 2-2: AC Electrical Characteristics  
V
= 3.3V 5ꢀ or 2.5V 5ꢀ; T = -40°C to +85°C, unless otherwise shown  
A
CC  
Parameter  
Symbol  
Conditions  
Min  
.27  
Typ  
Max  
2.97  
Units  
Notes  
Serial input data rate  
Additive jitter  
DR  
Gb/s  
1
2
2
2
3
3
SDO  
2.97Gb/s  
10  
10  
30  
ps  
ps  
ps  
p-p  
p-p  
p-p  
1.485Gb/s  
270Mb/s  
Rise/Fall time  
t , t  
SD/HD=0  
SD/HD=1  
HD/3G modes only  
135  
800  
35  
ps  
r
f
f
t , t  
400  
ps  
ps  
r
Mismatch in rise/fall time  
Duty cycle distortion  
Ut , Ut  
r
f
SD/HD=0, 2.97Gb/s  
SD/HD=0, 1.485Gb/s  
SD/HD=1  
14  
20  
50  
10  
ps  
ps  
ps  
dB  
dB  
4, 5  
4, 5  
4, 5  
4
Overshoot  
SD/HD=0,  
Output Return Loss  
ORL  
5 MHz – 1.485GHz  
1.485GHz – 2.97GHz  
17  
13  
750  
19  
15  
800  
6
6
Output Voltage Swing  
Input Voltage Swing  
V
R
= 750Ω  
850  
mV  
4
OUT  
SET  
p-p  
UV  
Guaranteed  
100  
250  
mV  
DDI  
p-pd  
functional.  
Guaranteed to meet all  
published  
250  
2200  
mV  
p-pd  
specifications.  
Output Enable Delay  
Output Disable Delay  
NOTES:  
100  
80  
ns  
ns  
1. The input coupling capacitor must be set accordingly for lower data rates.  
2. Turning on input trace equalization will reduce jitter in most applications.  
3. Rise/Fall time measured between 20% and 80%.  
4. Single-ended into 75Ω external load.  
5. Calculated as the actual positive bit-width compared to the expected positive bit-width using a 1010 pattern.  
6. ORL depends on board design. The GS2988 achieves this specification on Gennum's evaluation boards.  
GS2988 Dual-Slew-Rate, Cable Driver with 3Gb/s  
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Capability  
Data Sheet  
52131 - 4  
December 2010  
3. Input/Output Circuits  
V
V
CC  
CC  
DDI  
DDI  
EQ RC*  
SDO  
SDO  
V
cc  
V
CC  
I
REF  
5k  
50  
50  
10k  
*RC Network  
700p  
for Trace Equalization  
Figure 3-1: Differential Input Stage (DDI/DDI)  
Figure 3-2: Differential Output Stage (SDO/SDO)  
V
CC  
Pull-up  
80μA typical  
(50-150μA)  
IN  
VREF  
Figure 3-3: Control Input (DISABLE, SD/HD, EQ_EN)  
GS2988 Dual-Slew-Rate, Cable Driver with 3Gb/s  
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Data Sheet  
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December 2010  
4. Detailed Description  
4.1 Serial Data Input  
The GS2988 features a differential input buffer with on-chip 100Ω differential  
termination.  
The serial data input signal is connected to the DDI and DDI input pins of the device.  
Input signals can be single-ended or differential, DC or AC-coupled.  
The serial data input buffer is capable of operation with any binary coded signal that  
meets the input signal level requirements, in the range of 270Mb/s to at least 2.97Gb/s.  
The input circuit is self-biasing to allow for simple AC or DC-coupling of input signals to  
the device.  
4.2 Input Trace-equalization  
The GS2988 features fixed trace-equalization to compensate for PCB trace dielectric  
losses.  
NOTE: This feature is not available in SD mode, and therefore trace-equalization must  
be disabled when operating in this mode.  
The trace-equalization has two settings, OFF and ON. ON invokes a typical 3dB gain  
value at 1.5GHz. This value is optimized for compensating the high-frequency losses  
associated with approximately 10 inches of 5-mil stripline in FR4 material.  
Table 4-1: Input Trace-Equalization  
EQ_EN  
Function  
0
1
Typical 3dB Trace Equalization  
Trace Equalization OFF  
Floating  
Trace Equalization OFF  
4.3 Serial Data Output  
The GS2988 features a current-mode differential output driver capable of driving up to  
1800mVpp single-ended into a 1m length of 75Ω cable terminated at both ends.  
The output signal amplitude or swing is user configurable using an external RSET  
resistor.  
The SDO/SDO pin of the device provide the serial data outputs.  
4.3.1 Slew Rate Selection (Rise/Fall Time Requirement)  
The GS2988 supports two user-selectable output slew rates.  
Control of the slew rate is determined by the setting of the SD/HD input pin.  
GS2988 Dual-Slew-Rate, Cable Driver with 3Gb/s  
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Capability  
Data Sheet  
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December 2010  
Table 4-2: Slew Rate Selection  
SD/HD  
Rise/Fall Time  
0
1
SMPTE 424M & 292M compliant  
SMPTE 259M compliant  
Floating  
SMPTE 259M compliant  
4.4 Output Disable  
The GS2988 supports an output disable function for the serial data differential output.  
Control of this function is determined by the setting of the DISABLE control pin.  
The serial output disable (DISABLE), disables power to the entire device. When asserted  
LOW, the SDO/SDO output driver is powered-down.  
Table 4-3: Output Disable  
DISABLE  
SDO/SDO  
0
1
All Chip Power Down  
Operational  
Floating  
Operational  
4.5 Output Signal Presence Indicator (OSP)  
The GS2988 supports an output signal presence indicator function.  
The output signal presence pin (OSP) is an active-low output that indicates when a valid  
output signal has been detected at the pre-driver output.  
The output signal presence function measures signal-edge energy to indicate that the  
pre-driver to the serial data outputs is toggling.  
Table 4-4: Output Signal Presence Indicator  
Pre-Driver Output  
OSP Pin  
Valid signal present  
0
1
No valid signal present  
4.6 Output Amplitude (RSET)  
The output amplitude of the GS2988 can be adjusted by changing the value of the RSET  
resistor as shown in Figure 4-1. For an 800mVp-p output with a nominal ±7% tolerance,  
a value of 750Ω is required. A ±1% SMT resistor should be used.  
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Data Sheet  
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December 2010  
The RSET resistor is part of an internal DC feedback loop in the GS2988. The resistor  
should be placed as close as possible to the RSET pin, and connected directly to the VCC  
plane (traces/wires may cause instability). In addition, the PCB capacitance should be  
minimized at this node by removing the PCB groundplane beneath the RSET resistor and  
the RSET pin.  
NOTE: Care should be taken when considering layout of the RSET resistor. Please refer  
to Section 5.1 for more details.  
2.0  
1.75  
1.5  
1.25  
1.0  
0.75  
0.5  
0.25  
0.250  
0.500  
0.750  
1.0  
1.5  
1.25  
RSET (kΩ)  
Figure 4-1: VOUT vs. RSET  
In order to determine the best starting value for Rset, the following formula should be  
used:  
Rset = 8*(Rtrm/VoutppSE)  
Where VoutppSE is in Volts, and both resistances are in Ω.  
Rtrm is the value of the termination resistors, which should be equal to the  
characteristic impedance of the cable, and is typically 75Ω.  
The cable must be short (1m), and terminated at both ends for the formula to be valid.  
Example: For a 75Ω cable, Rtrm = 75Ω (at both ends), VoutppSE = 800mV  
Rset = 8*(75/0.8) = 750Ω  
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Data Sheet  
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December 2010  
This formula is not valid for long, unterminated, or improperly terminated cables.  
This formula should be considered as a starting point, and actual swing values may vary  
based on layout. Also, for large output swings (>1040mV), smaller Rset values may be  
required in order to achieve the desired output swing level at HD and 3G data rates.  
Table 4-5: Typical RSET Values  
Output Swing (mV)  
RSET (Ω)  
1800*  
800  
332  
750  
500  
1210  
*NOTE: In order to generate output swings greater than 1040mV, VCC_TERM must be  
connected to a 5V supply.  
4.7 Output Return Loss Measurement  
The GS2988 has a feature which allows users to measure ORL reliably while the device  
is still powered. The device can be put into a BALANCE mode which prevents the  
outputs from toggling while the device is powered on, allowing the ORL to be measured  
while the device is still powered.  
When EQ_EN is LOW while SD/HD is HIGH, the device goes into BALANCE mode. This  
mode is used during ORL measurement, disabling the AC signal path of the device  
without powering it down. When in BALANCE mode, the device produces equal  
pull-down currents in both differential shoulders of the serial data differential output,  
effectively stopping the output at the output common mode voltage level. Gennum  
recommends using BALANCE mode when measuring ORL with 2.5V termination  
voltage.  
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Data Sheet  
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December 2010  
5. Application Information  
5.1 PCB Layout  
Special attention must be paid to component layout when designing serial digital  
interfaces for HDTV.  
An FR-4 dielectric can be used, however, controlled impedance transmission lines are  
required for PCB traces longer than approximately 1cm. Note the following PCB artwork  
features used to optimize performance:  
The PCB trace width for HD rate signals is closely matched to SMT component  
width to minimize reflections due to changes in trace impedance  
The PCB ground plane is removed under the GS2988 output components to  
minimize parasitic capacitance (NOTE: care should be taken, as removing too much  
of the plane will make the system susceptible to EMI)  
The PCB ground plane is removed under the GS2988 RSET pin and resistor to  
minimize parasitic capacitance. The RSET resistor should be directly connected to  
the VCC plane  
Input and output BNC connectors are surface mounted in-line to eliminate a  
transmission line stub caused by a BNC mounting via high-speed traces  
High-speed traces are curved to minimize impedance variations due to change of  
PCB trace width  
NOTE: For more recommendations on Trace Lengths, ORL Inductor Values and other  
PCB Layout Considerations, please refer to Gennum’s GS2989 Design Guide  
(Doc ID 52070).  
5.2 Typical Application Circuit  
VCC  
**Please refer to section 4.2.  
10n  
10n  
9
16 10  
6
VCC_Term  
GND  
4u7  
4u7  
GND  
5n6*  
1
2
10n  
DDI  
DDI  
75R  
75R  
12  
11  
4u7  
4u7  
SDO  
SDO  
75R  
75R  
GS2988  
VCC  
VCC_Term  
5n6*  
4
RSET  
R*  
GND  
10n  
14  
3
*Customer to choose resistor value.  
GND  
NOTE: All resistors in Ohms, capacitors in Farads,  
and inductors in Henrys, unless otherwise stated.  
* Typical value: varies with layout, and represents a trade-off  
between good eye shape and output return loss.  
5n6 is the optimum value for an 800mV output swing.  
6n8 is the optimum value for an 1800mV output swing.  
Figure 5-1: Typical Application Circuit  
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Data Sheet  
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December 2010  
6. Package & Ordering Information  
6.1 Package Dimensions  
4.00+/-0.05  
2.76+/-0.10  
A
DATUM A  
B
PIN 1 AREA  
CENTER TAB  
DETAIL B  
2X  
C
0.15  
DATUM B  
2X  
C
0.15  
0.35+/-0.05  
0.10  
0.65  
16X  
A
B
C
0.05  
C
C
DATUM A OR B  
TERMINAL TIP  
0.10  
C
16X  
C
0.08  
0.65/2  
0.65  
SEATING PLANE  
DETAIL B  
SCALE:NTS  
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Data Sheet  
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December 2010  
6.2 Recommended PCB Footprint  
0.35  
0.65  
0.55  
3.70  
2.76  
CENTER PAD  
NOTE: All dimensions  
are in millimeters.  
2.76  
3.70  
The Center Pad should be connected to the most negative power supply plane (VEE) by  
a minimum of 5 vias.  
NOTE: Suggested dimensions only. Final dimensions should conform to customer  
design rules and process optimizations.  
6.3 Packaging Data  
Parameter  
Value  
Package type / dimensions / pad pitch  
16-pin QFN / 4mm x 4mm /  
0.65mm  
Package Drawing Reference  
Moisture Sensitivity Level  
JEDEC M0220  
3
Junction to Case Thermal Resistance, θ  
31.0°C/W  
j-c  
Junction to Air Thermal Resistance, θ (at zero airflow)  
43.8°C/W  
j-a  
Psi, Ψ  
11.0°C/W  
Yes  
Pb-free and RoHS compliant, Halogen-free  
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Data Sheet  
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December 2010  
6.4 Solder Reflow Profiles  
The device is manufactured with Matte-Sn terminations and is compatible with both  
standard eutectic and Pb-free solder reflow profiles. MSL qualification was performed  
using the maximum Pb-free reflow profile shown in Figure 6-1.  
Temperature  
60-150 sec.  
20-40 sec.  
26C  
250°C  
C/sec max  
217°C  
6°C/sec max  
200°C  
150°C  
25°C  
Time  
60-180 sec. max  
8 min. max  
Figure 6-1: Maximum Pb-free Solder Reflow Profile (Preferred)  
6.5 Marking Diagram  
Pin 1  
Indicator  
GS2988  
XXXXE3  
YYWW  
Instructions:  
GS2988  
Package Mark  
XXXX  
Last 4 digits (excluding decimal) of  
SAP Batch Assembly (FIN) as listed  
on Packing Slip  
Pb-free & Green indicator  
Date Code  
E3  
YYWW  
GS2988 Dual-Slew-Rate, Cable Driver with 3Gb/s  
16 of 17  
Capability  
Data Sheet  
52131 - 4  
December 2010  
6.6 Ordering Information  
Part Number  
Package  
Temperature Range  
GS2988  
GS2988  
GS2988-INE3  
GS2988-INTE3  
16-pin QFN  
-40°C to 85°C  
-40°C to 85°C  
16-pin QFN  
250pc Reel  
GS2988  
GS2988-INTE3Z  
16-pin QFN  
-40°C to 85°C  
2,500pc Reel  
CAUTION  
ELECTROSTATIC SENSITIVE DEVICES  
DOCUMENT IDENTIFICATION  
DATA SHEET  
The product is in production. Gennum reserves the right to make changes to  
the product at any time without notice to improve reliability, function or  
design, in order to provide the best product possible.  
DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A  
STATIC-FREE WORKSTATION  
Phone: +1 (905) 632-2996  
Fax: +1 (905) 632-2055  
www.gennum.com  
GENNUM CORPORATE HEADQUARTERS  
4281 Harvester Road, Burlington, Ontario L7L 5M4 Canada  
E-mail: corporate@gennum.com  
OTTAWA  
SNOWBUSH IP - A DIVISION OF GENNUM  
GERMANY  
232 Herzberg Road, Suite 101  
Kanata, Ontario K2K 2A1  
Canada  
439 University Ave. Suite 1700  
Toronto, Ontario M5G 1Y8  
Canada  
Gennum Canada Limited  
Niederlassung Deutschland  
München, Germany  
Phone: +1 (613) 270-0458  
Fax: +1 (613) 270-0429  
Phone: +1 (416) 925-5643  
Phone: +49 89 309040 290  
Fax: +1 (416) 925-0581  
Fax: +49 89 309040 293  
E-mail: sales@snowbush.com  
Web Site: http://www.snowbush.com  
E-mail: gennum-germany@gennum.com  
CALGARY  
Suite 320, 3553 31st St. N.W.  
Calgary, Alberta T2L 2K7  
Canada  
NORTH AMERICA WESTERN REGION  
691 South Milpitas Blvd., Suite #200  
Milpitas, CA 95035  
United States  
MEXICO  
Venustiano Carranza 122 Int. 1  
Centro, Aguascalientes  
Mexico CP 20000  
Phone: +1 (403) 284-2672  
Fax: +1 (905) 632-2055  
Phone: +1 (408) 934-1301  
Fax: +1 (408) 934-1029  
Phone: +1 (416) 848-0328  
UNITED KINGDOM  
South Building, Walden Court  
Parsonage Lane,  
Bishop’s Stortford Hertfordshire, CM23 5DB  
United Kingdom  
E-mail: naw_sales@gennum.com  
JAPAN KK  
Shinjuku Green Tower Building 27F  
6-14-1, Nishi Shinjuku  
Shinjuku-ku, Tokyo, 160-0023  
Japan  
NORTH AMERICA EASTERN REGION  
4281 Harvester Road  
Burlington, Ontario L7L 5M4  
Canada  
Phone: +44 1279 714170  
Fax: +44 1279 714171  
Phone: +81 (03) 3349-5501  
Phone: +1 (905) 632-2996  
Fax: +1 (905) 632-2055  
Fax: +81 (03) 3349-5505  
INDIA  
E-mail: gennum-japan@gennum.com  
Web Site: http://www.gennum.co.jp  
#208(A), Nirmala Plaza,  
Airport Road, Forest Park Square  
Bhubaneswar 751009  
India  
E-mail: nae_sales@gennum.com  
TAIWAN  
6F-4, No.51, Sec.2, Keelung Rd.  
Sinyi District, Taipei City 11502  
Taiwan R.O.C.  
Phone: +91 (674) 65304815  
Fax: +91 (674) 259-5733  
Phone: (886) 2-8732-8879  
Fax: (886) 2-8732-8870  
E-mail: gennum-taiwan@gennum.com  
Gennum Corporation assumes no liability for any errors or omissions in this document, or for the use of the circuits or devices described herein. The sale of  
the circuit or device described herein does not imply any patent license, and Gennum makes no representation that the circuit or device is free from patent  
infringement.  
All other trademarks mentioned are the properties of their respective owners.  
GENNUM and the Gennum logo are registered trademarks of Gennum Corporation.  
© Copyright 2009 Gennum Corporation. All rights reserved.  
www.gennum.com  
GS2988 Dual-Slew-Rate, Cable Driver with 3Gb/s  
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Capability  
Data Sheet  
17  
52131 - 4  
December 2010  

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