GS2989 Dual-Slew-Rate, Dual-Output Cable Driver with 3Gb/s Capability
1 of 19GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
www.gennum.com
Features
• SMPTE 424M, SMPTE 292M and SMPTE 259M
compliant
• Supports DVB-ASI at 270Mb/s
• Supports data rates from 270Mb/s to 2.97Gb/s
• Wide common-mode range input buffer
100mV sensitivity
supports DC-coupling to industry-standard
differential logic
on-chip 100Ω differential data input termination
• Input signal trace equalization
• Dual differential coaxial-cable-driving outputs
selectable slew rates
adjustable output swing from 500mVpp to
1800mVpp
independent DISABLE controls for each output
• Robust output signal presence function
• Excellent output eye quality
• 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)
new dual-output pin out
use the GS2988 for a single-output variant that is
drop-in compatible to the GS2978
• Pb-free and RoHS compliant
Applications
• SMPTE 424M, SMPTE 292M and SMPTE 259M coaxial
cable serial digital interfaces
Description
The GS2989 is a high-speed BiCMOS integrated circuit
designed to drive one to four 75Ω coaxial cables.
The GS2989 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.
The GS2989 accepts industry-standard differential input
levels including LVPECL and CML.
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.
The DISABLE1 and DISABLE2 pins power-down the first
and second output drivers respectively, leaving the serial
data outputs in a high-impedance state. When applied
simultaneously, the entire device is powered-down.
The GS2989 features adjustable output swing using an
external bias resistor. The single-ended output swing is
adjustable from 500mVpp to 1800mVpp.
An output signal presence function, the OSP pin, indicates
whether an active signal is present at the output of the
GS2989.
The GS2989 can be powered from either a 3.3V or a 2.5V
supply. Power consumption is typically 110mW using a
2.5V power supply with one output enabled.
The GS2989 is Pb-free, and the encapsulation compound
does not contain halogenated flame retardant.
This component and all homogeneous subcomponents are
RoHS compliant.
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
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Functional Block Diagram
Revision History
Version ECR PCN Date Changes and/or Modifications
4 155552 – December 2010 Correction to Marking Diagram.
3 155359 – November 2010 Clarified the functionality of the EQ_EN pin in Table
1-1: Pin Descriptions and throughout the document.
2 155070 – October 2010 Updated Typical Application Circuit.
1 153602 – February 2010 Converted to Data Sheet.
0 152844 – October 2009 Converted to Preliminary Data Sheet. Updates
throughout.
B 152691 – October 2009 Updates to Section 2. Electrical Characteristics.
Corrections to Section 3. Input/Output Circuits.
A 151623 – April 2009 New document.
DDI
DDI
RSET
Equalizer
OSP
EQ_EN SD/HD
SDO1
SDO1
SDO2
SDO2
DISABLE2
DISABLE1
Band Gap Reference
&
Output Control
Output
Signal
Presence
Slew Rate
Control
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
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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 ............................................................................................................................6
2.1 Absolute Maximum Ratings ..........................................................................................................6
2.2 DC Electrical Characteristics ........................................................................................................6
2.3 AC Electrical Characteristics ........................................................................................................7
3. Input/Output Circuits ..................................................................................................................................9
4. Detailed Description.................................................................................................................................. 10
4.1 Serial Data Input ............................................................................................................................ 10
4.2 Input Trace-equalization ............................................................................................................. 10
4.3 Serial Data Output ......................................................................................................................... 10
4.3.1 Slew Rate Selection (Rise/Fall Time Requirement)................................................. 10
4.4 Output Disable ................................................................................................................................ 11
4.5 Output Signal Presence Indicator (OSP) ................................................................................. 11
4.6 Output Amplitude (RSET) ........................................................................................................... 12
4.7 Output Return Loss Measurement ........................................................................................... 13
5. Application Information .......................................................................................................................... 14
5.1 PCB Layout ....................................................................................................................................... 14
5.2 Typical Application Circuit ........................................................................................................ 15
6. Package & Ordering Information.......................................................................................................... 16
6.1 Package Dimensions ..................................................................................................................... 16
6.2 Recommended PCB Footprint ................................................................................................... 17
6.3 Packaging Data ............................................................................................................................... 17
6.4 Solder Reflow Profiles .................................................................................................................. 18
6.5 Marking Diagram ........................................................................................................................... 18
6.6 Ordering Information ................................................................................................................... 19
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
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1. Pin Out
1.1 Pin Assignment
Figure 1-1: 16-Pin QFN
1.2 Pin Descriptions
5678
1615 14 13
DDI
1
2
3
4
DDI
12
11
10
9
VCC
VEE
Ground Pad
(bottom of package)
RSET
DISABLE1
DISABLE2
VCC
SD/HD
OSP
VEE
SDO1
SDO1
SDO2
SDO2
GS2989
16-pin QFN
(top view)
EQ_EN
Table 1-1: Pin Descriptions
Pin Number Name Ty p e Description
1, 8 VCC Power Most positive power supply connection for the input buffer and core.
Connect to 3.3V or 2.5V.
2, 3 DDI, DDI Input Serial data differential input.
4, 13 VEE Power Most negative power supply connection for the input buffer and core.
Connect to GND.
5 RSET Input External output amplitude control resistor connection.
6* DISABLE1 Input Control signal input.
When set LOW, the first serial data output is disabled (powered-down) and the
SDO1/SDO1 pins are set to high-impedance. When set HIGH, the SDO1/SDO1 pins will
output a serial data signal.
NOTE: if this pin is left floating, the first serial data output will be enabled.
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
5 of 19
7* DISABLE2 Input Control signal input.
When set LOW, the second serial data output is disabled (powered-down) and the
SDO2/SDO2 pins are set to high-impedance.
When set HIGH, the SDO2/SDO2 pins will output a serial data signal.
NOTE: if this pin is left floating, the second serial data output will be disabled.
9,10 SDO2/
SDO2
Output Serial data differential output of second output buffer.
11,12 SDO1/
SDO1
Output Serial data differential output of first output buffer.
14 OSP Output 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.
15 SD/HD Input Control signal input.
When set HIGH, the serial data outputs will meet the SMPTE 259M rise/fall time
specification.
When set LOW, the serial outputs will meet the SMPTE 292M and SMPTE 424M rise/fall
time specification.
NOTE: if this pin is left floating, the serial data outputs will meet the SMPTE 259M
rise/fall time specification.
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 17.
*NOTE: When pins 6 and 7 are driven LOW together (or similarly when pin 6 is driven LOW while pin 7 is left floating), the
entire device is powered-down. In this state, minimum power consumption occurs.
Table 1-1: Pin Descriptions
Pin Number Name Ty p e Description
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
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2. Electrical Characteristics
2.1 Absolute Maximum Ratings
2.2 DC Electrical Characteristics
Parameter Value
Supply Voltage -0.5V to 3.6 VDC
Input ESD Voltage 2.5kV
Storage Temperature Range -50°C < Ts < 125°C
Input Voltage Range (any input) -0.3 to (VCC +0.3)V
Operating Temperature Range -40°C to +85°C
Solder Reflow Temperature 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.
Table 2-1: DC Electrical Characteristics
VCC = 3.3V ±5% or 2.5V ±5%; TA = -40°C to +85°C, unless otherwise shown
Parameter Symbol Conditions Min Typ Max Units Notes
Supply Voltage VCC 3.3V Typical 3.135 3.3 3.465 V –
2.5V Typical 2.375 2.5 2.625 V –
Power Consumption
(2.5V)
PDSDO1/SDO1 enabled,
SDO2/SDO2 disabled
– 110 130 mW 1
SDO1/SDO1 and
SDO2/SDO2 enabled
– 180 215 mW 1
SDO1/SDO1 and
SDO2/SDO2 disabled
–35mW1
Power Consumption
(3.3V)
SDO1/SDO1 enabled,
SDO2/SDO2 disabled
– 155 183 mW 1
SDO1/SDO1 and
SDO2/SDO2 enabled
– 250 300 mW 1
SDO1/SDO1 and
SDO2/SDO2 disabled
–46mW1
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
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2.3 AC Electrical Characteristics
Supply Current IS1 channel, VCC = 3.3V – 47 53 mA 1
1 channel, VCC = 2.5V – 44 50 mA 1
2 channels, VCC = 3.3V – 76 87 mA 1
2 channels, VCC = 2.5V – 72 82 mA 1
Power-down – 1 1.8 mA 1
Output Voltage VCMOUT Common mode – VTERM - VOUT –V–
Input Voltage VCMIN Common mode 1.4 + ΔVDDI/2 – VCC - ΔVDDI/2 V –
SD/HD, DISABLE,
EQ_EN Input
VIH I
IH <= 150μA1.7––V–
VIL IIL <= 150μA––0.8V–
OSP Drive Strength – – 2 – – mA –
NOTES:
1. Power consumed in GS2989 only. Termination resistors draw extra current with output swing = 800mV.
Table 2-1: DC Electrical Characteristics
VCC = 3.3V ±5% or 2.5V ±5%; TA = -40°C to +85°C, unless otherwise shown
Parameter Symbol Conditions Min Typ Max Units Notes
Table 2-2: AC Electrical Characteristics
VCC = 3.3V ±5% or 2.5V ±5%; TA = -40°C to +85°C, unless otherwise shown
Parameter Symbol Conditions Min Typ Max Units Notes
Serial input data rate DRSDO –.27–2.97Gb/s 1
Additive jitter – 2.97Gb/s – 10 – psp-p 2
– 1.485Gb/s – 10 – psp-p 2
– 270Mb/s – 30 – psp-p 2
Rise/Fall time tr, tfSD/HD=0 – – 135 ps 3
tr, tfSD/HD=1 400 – 800 ps 3
Mismatch in rise/fall time Utr, UtfHD/3G modes only – – 35 ps –
Duty cycle distortion – SD/HD=0, 2.97Gb/s – – 14 ps 4, 5
– SD/HD=0, 1.485Gb/s – – 20 ps 4, 5
– SD/HD=1 – – 50 ps 4, 5
Overshoot – SD/HD=0, – – 10 % 4
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
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Output Return Loss ORL 5 MHz – 1.485GHz 17 19 – dB 6
1.485GHz – 2.97GHz 13 15 – dB 6
Output Voltage Swing VOUT RSET = 750Ω750 800 850 mVp-p 4
Input Voltage Swing UVDDI Guaranteed
functional.
100 – 250 mVp-pd –
Guaranteed to meet all
published
specifications.
250 2200 mVp-pd –
Output Enable Delay – – – – 100 ns –
Output Disable Delay – – – – 80 ns –
NOTES:
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% applies to 800mV output swing only.
4. Single-ended into a 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 GS2989 achieves this specification on Gennum's evaluation boards.
Table 2-2: AC Electrical Characteristics
VCC = 3.3V ±5% or 2.5V ±5%; TA = -40°C to +85°C, unless otherwise shown
Parameter Symbol Conditions Min Typ Max Units Notes
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
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3. Input/Output Circuits
Figure 3-1: Differential Input Stage (DDI/DDI)Figure 3-2: Differential Output Stage (SDO1/SDO1,
SDO2/SDO2)
Figure 3-3: Control Input (DISABLE1, SD/HD, EQ_EN)Figure 3-4: Control Input (DISABLE2)
V
CC
V
CC
DDI DDI
50 50
5k
10k
EQ RC*
V
CC
700p
*RC Network
for Trace Equalization
Vcc
IREF
SDO SDO
V
CC
IN
VREF
Pull-up
80μA typical
(50-150μA)
IN
VREF
Pull-down
80μA typical
(50-150μA)
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
10 of 19
4. Detailed Description
4.1 Serial Data Input
The GS2989 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 GS2989 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.
4.3 Serial Data Output
The GS2989 features dual current-mode differential output drivers 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 SDO1/SDO1 and SDO2/SDO2 pins of the device provide the serial data outputs.
4.3.1 Slew Rate Selection (Rise/Fall Time Requirement)
The GS2989 supports two user-selectable output slew rates.
Table 4-1: Input Trace-Equalization
EQ_EN Function
0 Typical 3dB Trace Equalization
1Trace Equalization OFF
Floating Trace Equalization OFF
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
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Control of the slew rate is determined by the setting of the SD/HD input pin.
4.4 Output Disable
The GS2989 supports an output disable function for each serial data differential output.
Control of this function is determined by the setting of the DISABLE1 and DISABLE2
control pins.
The serial output disables (DISABLE1 and DISABLE2), disable power to the current mode
serial data output drivers. When asserted LOW, the SDO/SDO output drivers are
powered-down.
When DISABLE1 and DISABLE2 are driven LOW simultaneously, the entire device is
powered down, and the power consumption is minimized.
4.5 Output Signal Presence Indicator (OSP)
The GS2989 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 4-2: Slew Rate Selection
SD/HD Rise/Fall Time
0 SMPTE 424M & 292M compliant
1 SMPTE 259M compliant
Floating SMPTE 259M compliant
Table 4-3: Output Disable
DISABLE1 DISABLE2 SDO1/SDO1 SDO2/SDO2
0 0 or Floating All Chip Power Down
0 1 High-Impedance Operational
1 or Floating 0 or Floating Operational High-Impedance
1 or Floating 1 Operational Operational
Floating Floating Operational High-Impedance
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
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4.6 Output Amplitude (RSET)
The output amplitude of the GS2989 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.
The RSET resistor is part of an internal DC feedback loop in the GS2989. 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.
Figure 4-1: VOUT vs. RSET
Table 4-4: Output Signal Presence Indicator
Pre-Driver Output OSP Pin
Valid signal present 0
No valid signal present 1
1.75
1.5
1.25
1.0
0.75
0.5
0.25
2.0
0.250 0.500 0.750 1.0 1.25 1.5
RSET (kΩ)
VOUT (V)
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
13 of 19
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
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.
4.7 Output Return Loss Measurement
The GS2989 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 both serial data differential outputs,
effectively stopping all outputs at the output common mode voltage level. Gennum
recommends using BALANCE mode when measuring ORL with 2.5V termination
voltage.
Table 4-5: Typical RSET Values
Output Swing (mV) RSET (Ω)
1800* 332
800 750
500 1210
*NOTE: In order to generate output swings greater than 1040mV, VCC_TERM must be
connected to a 5V supply.
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
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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 GS2989 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 GS2989 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 round-curved (rather than 45° or 90° angles) 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).
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
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5.2 Typical Application Circuit
Figure 5-1: Typical Application Circuit
DDI
2
DDI
3
VCC 1
VCC 8
VEE
4
VEE
13
SDO1 12
SDO1 11
SDO2 10
SDO2 9
RSET
5
DISABLE1 6
DISABLE2 7
**EQ_EN 16
SD/HD 15
OSP
14
GS2989
VCC_Term
10n GND
75R
4u7
4u7
4u7
4u7
75R
VCC_Term
VCC_Term
10n
75R
10n
GND
GND
4u7
4u7
75R
75R
75R
75R
75R
5n6*
5n6*
GND
VCC
GND
VCC
10n 10n
R*
* 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
and 3.3V operation.
4n7 is the optimum value for an 800mV output swing and
2.5V operation.
6n8 is the optimum value for an 1800mV output swing.
NOTE: All resistors in Ohms, capacitors in Farads,
and inductors in Henrys, unless otherwise stated.
*Customer to choose resistor value.
5n6*
5n6*
**Please refer to section 4.2.
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
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6. Package & Ordering Information
6.1 Package Dimensions
4.00+/-0.05
B
4.00+/-0.05
2X
2X
0.15
0.15
C
C
0.10 C
16X
0.08 C
SEATING PLANE
0.85+/-0.05
0.00-0.05
0.65/2
0.65
DETAIL B
SCALE:NTS
DATUM A OR B
TERMINAL TIP
0.20 REF
DATUM B
DETAIL B
0.65
16X
0.35+/-0.05
0.10
0.05 C
AB
C
DATUM A
2.76+/-0.10
0.40+/-0.05
2.76+/-0.10
DETAIL B
CENTER TAB
PIN 1 AREA
A
C
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
17 of 19
6.2 Recommended PCB Footprint
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 JEDEC M0220
Moisture Sensitivity Level 3
Junction to Case Thermal Resistance, θj-c 31.0°C/W
Junction to Air Thermal Resistance, θj-a (at zero airflow) 43.8°C/W
Psi, Ψ11.0°C/W
Pb-free and RoHS compliant, Halogen-free Yes
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
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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.
Figure 6-1: Maximum Pb-free Solder Reflow Profile (Preferred)
6.5 Marking Diagram
25°C
150°C
200°C
217°C
260°C
250°C
Time
Temperature
8 min. max
60-180 sec. max
60-150 sec.
20-40 sec.
3°C/sec max
6°C/sec max
Instructions:
GS2989 Package Mark
XXXX Last 4 digits (excluding decimal) of
SAP Batch Assembly (FIN) as listed
on Packing Slip
E3 Pb-free & Green indicator
YYWW Date Code
Pin 1
Indicator
GS2989
XXXXE3
YYWW
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Kanata, Ontario K2K 2A1
Canada
Phone: +1 (613) 270-0458
Fax: +1 (613) 270-0429
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Calgary, Alberta T2L 2K7
Canada
Phone: +1 (403) 284-2672
UNITED KINGDOM
South Building, Walden Court
Parsonage Lane,
Bishop’s Stortford Hertfordshire, CM23 5DB
United Kingdom
Phone: +44 1279 714170
Fax: +44 1279 714171
INDIA
#208(A), Nirmala Plaza,
Airport Road, Forest Park Square
Bhubaneswar 751009
India
Phone: +91 (674) 653-4815
Fax: +91 (674) 259-5733
SNOWBUSH IP - A DIVISION OF GENNUM
439 University Ave. Suite 1700
Toronto, Ontario M5G 1Y8
Canada
Phone: +1 (416) 925-5643
Fax: +1 (416) 925-0581
E-mail: sales@snowbush.com
Web Site: http://www.snowbush.com
MEXICO
288-A Paseo de Maravillas
Jesus Ma., Aguascalientes
Mexico 20900
Phone: +1 (416) 848-0328
JAPAN KK
Shinjuku Green Tower Building 27F
6-14-1, Nishi Shinjuku
Shinjuku-ku, Tokyo, 160-0023
Japan
Phone: +81 (03) 3349-5501
Fax: +81 (03) 3349-5505
E-mail: gennum-japan@gennum.com
Web Site: http://www.gennum.co.jp
TA I W A N
6F-4, No.51, Sec.2, Keelung Rd.
Sinyi District, Taipei City 11502
Taiwan R.O.C.
Phone: (886) 2-8732-8879
Fax: (886) 2-8732-8870
E-mail: gennum-taiwan@gennum.com
GERMANY
Hainbuchenstraße 2
80935 Muenchen (Munich), Germany
Phone: +49-89-35831696
Fax: +49-89-35804653
E-mail: gennum-germany@gennum.com
NORTH AMERICA WESTERN REGION
691 South Milpitas Blvd., Suite #200
Milpitas, CA 95035
United States
Phone: +1 (408) 934-1301
Fax: +1 (408) 934-1029
E-mail: naw_sales@gennum.com
NORTH AMERICA EASTERN REGION
4281 Harvester Road
Burlington, Ontario L7L 5M4
Canada
Phone: +1 (905) 632-2996
Fax: +1 (905) 632-2055
E-mail: nae_sales@gennum.com
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.
GS2989 Dual-Slew-Rate, Dual-Output Cable Driver
with 3Gb/s Capability
Data Sheet
52133 - 4 December 2010
19 of 19
19
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
GENNUM CORPORATE HEADQUARTERS
4281 Harvester Road, Burlington, Ontario L7L 5M4 Canada
Phone: +1 (905) 632-2996 Fax: +1 (905) 632-2055
E-mail: corporate@gennum.com www.gennum.com
CAUTION
ELECTROSTATIC SENSITIVE DEVICES
DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A
STATIC-FREE WORKSTATION
6.6 Ordering Information
Part Number Package Temperature Range
GS2989 GS2989-INE3 16-pin QFN -40°C to 85°C
GS2989 GS2989-INTE3 16-pin QFN
250pc Reel
-40°C to 85°C
GS2989 GS2989-INTE3Z 16-pin QFN
2,500pc Reel
-40°C to 85°C