GS2989-INTE3Z [SEMTECH]
Dual-Slew-Rate, Dual-Output Cable Driver with 3Gb/s Capability;
| 型号： | GS2989-INTE3Z |
| 厂家： | 
SEMTECH CORPORATION |
| 描述： | Dual-Slew-Rate, Dual-Output Cable Driver with 3Gb/s Capability |
| 文件： | 总20页 (文件大小：664K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
GS2989
Dual-Slew-Rate, Dual-Output Cable
Driver with 3Gb/s Capability
Features
Description
The GS2989 is a high-speed BiCMOS integrated circuit
•
SMPTE 424M, SMPTE 292M, and SMPTE 259M
designed to drive one to four 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 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.
100mV sensitivity
The GS2989 accepts industry-standard differential input
levels including LVPECL and CML.
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.
On-chip 100Ω differential data input termination
•
•
Input signal trace equalization
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.
Dual differential coaxial-cable-driving outputs
Selectable slew rates
Adjustable output swing from 500mV to
pp
1800mV
pp
The GS2989 features adjustable output swing using an
external bias resistor. The single-ended output swing is
Independent DISABLE controls for each output
adjustable from 500mV to 1800mV
.
pp
pp
•
•
•
•
•
•
Robust output signal presence function
Excellent output eye quality
An output signal presence function, the OSP pin, indicates
whether an active signal is present at the output of the
GS2989.
Power supply operation at 3.3V or 2.5V
135mW power consumption (2.5V supply)
Operating temperature range: -40°C to +85°C
Small footprint QFN package (4mm x 4mm)
The GS2989 can be powered from either a 3.3V or a 2.5V
supply. Power consumption is typically 135mW 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.
New dual-output pin out
Use the GS2988 for a single-output variant that is
drop-in compatible to the GS2978
This component and all homogeneous subcomponents are
RoHS compliant.
•
Pb-free and RoHS compliant
Applications
•
SMPTE 424M, SMPTE 292M, and SMPTE 259M coaxial
cable serial digital interfaces
GS2989
Final Data Sheet
1 of 20
Semtech
www.semtech.com
Rev.6
GENDOC-052133 July 2015
EQ_EN
SD/HD
DISABLE1
SDO1
SDO1
DDI
DDI
Output
Signal
Presence
OSP
Slew Rate
Control
Equalizer
SDO2
SDO2
Band Gap Reference
&
Output Control
RSET
DISABLE2
Functional Block Diagram
Revision History
Version
ECO
Date
Changes and/or Modifications
6
026765
158155
155552
155359
July 2015
June 2012
Updated to the newest document template.
Corrections to Table 2-2: DC Electrical Characteristics
and Table 2-3: AC Electrical Characteristics.
5
4
3
December 2010 Correction to Marking Diagram.
Clarified the functionality of the EQ_EN pin in Table
November 2010
1-1: Pin Descriptions and throughout the document.
Updated Typical Application Circuit.
Converted to Data Sheet.
2
1
155070
153602
October 2010
February 2010
Converted to Preliminary Data Sheet. Updates
throughout.
0
152844
October 2009
Updates to Section 2. Electrical Characteristics.
Corrections to Section 3. Input/Output Circuits.
B
152691
151623
October 2009
April 2009
A
New document.
GS2989
Final Data Sheet
GENDOC-052133 July 2015
2 of 20
Semtech
www.semtech.com
Rev.6
Contents
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).................................................. 11
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 ............................................................................................ 14
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
Final Data Sheet
3 of 20
Semtech
www.semtech.com
Rev.6
GENDOC-052133 July 2015
1. Pin Out
1.1 Pin Assignment
16
15
14
13
12
11
10
9
1
VCC
SDO1
GS2989
16-pin QFN
(top view)
DDI
DDI
VEE
2
3
4
SDO1
SDO2
SDO2
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
Most positive power supply connection for the input buffer and core.
Connect to 3.3V or 2.5V.
1, 8
2, 3
4, 13
5
VCC
DDI, DDI
VEE
Power
Input
Power
Input
Serial data differential input.
Most negative power supply connection for the input buffer and core.
Connect to GND.
RSET
External output amplitude control resistor connection.
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.
6*
DISABLE1
Input
Note: if this pin is left floating, the first serial data output will be enabled.
GS2989
Final Data Sheet
4 of 20
Semtech
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Rev.6
GENDOC-052133 July 2015
Table 1-1: Pin Descriptions (Continued)
Pin Number
Name
Type
Description
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.
7*
DISABLE2
Input
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.
SDO2/
SDO2
9,10
Output
Output
Serial data differential output of second output buffer.
Serial data differential output of first output buffer.
SDO1/
SDO1
11,12
Output signal presence status signal output.
Signal levels are LVCMOS/LVTTL compatible.
Indicates presence of a valid output signal.
14
15
OSP
Output
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.
Control signal input.
When set HIGH, the serial data outputs will meet the SMPTE 259M rise/fall time
specification.
SD/HD
Input
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.
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.
16
—
EQ_EN
Input
Connect to most negative power supply plane following the recommendations in
Recommended PCB Footprint on page 17.
Center Pad
Power
*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.
GS2989
Final Data Sheet
5 of 20
Semtech
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Rev.6
GENDOC-052133 July 2015
2. Electrical Characteristics
2.1 Absolute Maximum Ratings
Table 2-1: Absolute Maximum Ratings
Parameter
Value
-0.5V to 3.6 VDC
Supply Voltage
Input ESD Voltage
2.5kV
-50°C < Ts < 125°C
Storage Temperature Range
-0.3 to (VCC +0.3)V
Input Voltage Range (any input)
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.
2.2 DC Electrical Characteristics
Table 2-2: DC Electrical Characteristics
VCC = 3.3V 5ꢀ or 2.5V 5ꢀ% TA = -40°C to +85°C, unless otherwise shown
Parameter
Symbol Conditions
Min
Typ
Max
Units Notes
3.3V Typical
VCC
3.135
2.375
3.3
2.5
3.465
2.625
V
V
—
—
Supply Voltage
2.5V Typical
SDO1/SDO1 enabled,
SDO2/SDO2 disabled
—
—
—
—
—
—
135
205
3
160
242
5
mW
mW
mW
mW
mW
mW
1
1
1
1
1
1
Power Consumption
(2.5V)
SDO1/SDO1 and
SDO2/SDO2 enabled
SDO1/SDO1 and
SDO2/SDO2 disabled
PD
SDO1/SDO1 enabled,
SDO2/SDO2 disabled
185
284
4
222
340
6
Power Consumption
(3.3V)
SDO1/SDO1 and
SDO2/SDO2 enabled
SDO1/SDO1 and
SDO2/SDO2 disabled
GS2989
Final Data Sheet
6 of 20
Semtech
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Rev.6
GENDOC-052133 July 2015
Table 2-2: DC Electrical Characteristics (Continued)
VCC = 3.3V 5ꢀ or 2.5V 5ꢀ% TA = -40°C to +85°C, unless otherwise shown
Parameter
Symbol Conditions
1 channel, VCC = 3.3V
Min
Typ
Max
Units Notes
—
56
64
mA
mA
mA
mA
mA
V
1
1
1 channel, VCC = 2.5V
2 channels, VCC = 3.3V
2 channels, VCC = 2.5V
Power-down
—
54
61
IS
Supply Current
—
86
98
1
—
82
92
1
—
—
1
1.8
—
1
VCMOUT
VCMIN
VIH
V
TERM - VOUT
Output Voltage
Input Voltage
Common mode
—
1.4 + ΔVDDI/2
VCC - ΔVDDI/2
Common mode
IIH <= 150μA
IIL <= 150μA
—
—
—
—
—
V
V
—
—
—
—
1.7
—
2
—
0.4
—
SD/HD, DISABLE,
EQ_EN Input
VIL
V
OSP Drive Strength
—
mA
Notes:
1. Power consumed in GS2989 only. Termination resistors draw extra current with output swing = 800mV.
2.3 AC Electrical Characteristics
Table 2-3: AC Electrical Characteristics
VCC = 3.3V 5ꢀ or 2.5V 5ꢀ% TA = -40°C to +85°C, unless otherwise shown
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Notes
DRSDO
Serial input data rate
—
.27
—
—
10
10
30
—
—
2.97
—
Gb/s
pspp
pspp
pspp
1
2
2
2
3
3
—
—
2.97Gb/s
1.485Gb/s
270Mb/s
SD/HD=0
SD/HD=1
Additive jitter
—
—
—
—
—
tr, tf
—
135
800
ps
ps
Rise/Fall time
tr, tf
400
Utr, Utf
Mismatch in rise/fall time
HD/3G modes only
SD/HD=0, 2.97Gb/s
SD/HD=0, 1.485Gb/s
SD/HD=1
—
—
—
—
—
—
—
—
—
—
35
14
20
50
10
ps
ps
ps
ps
ꢀ
—
4, 5
4, 5
4, 5
4
—
—
—
—
Duty cycle distortion
Overshoot
SD/HD=0,
GS2989
Final Data Sheet
7 of 20
Semtech
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Rev.6
GENDOC-052133 July 2015
Table 2-3: AC Electrical Characteristics (Continued)
VCC = 3.3V 5ꢀ or 2.5V 5ꢀ% TA = -40°C to +85°C, unless otherwise shown
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Notes
5 MHz — 1.485GHz
1.485GHz — 2.97GHz
RSET = 750Ω
17
13
19
15
—
—
dB
dB
6
6
4
Output Return Loss
ORL
VOUT
mVpp
Output Voltage Swing
750
800
850
mVppd
Guaranteed functional.
100
—
250
—
UVDDI
Guaranteed to meet all
published
specifications.
Input Voltage Swing
Output Disable Delay
Output Enable Delay
Notes:
mVppd
250
2200
—
—
—
—
—
—
—
—
80
4
ns
—
—
All outputs disabled to
any output enabled.
μs
One output enabled to
both outputs enabled.
—
—
—
500
ns
7
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 20ꢀ and 80ꢀ 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 Semtech's evaluation boards.
7. This Output Enable Delay applies only to the newly enabled output. The output that is already enabled is not impacted in this case.
GS2989
Final Data Sheet
8 of 20
Semtech
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Rev.6
GENDOC-052133 July 2015
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 3-2: Differential Output Stage (SDO1/SDO1,
SDO2/SDO2)
Figure 3-1: Differential Input Stage (DDI/DDI)
V
CC
Pull-up
80μA typical
(50-150μA)
IN
IN
Pull-down
80μA typical
(50-150μA)
VREF
VREF
Figure 3-3: Control Input (DISABLE1, SD/HD, EQ_EN)
Figure 3-4: Control Input (DISABLE2)
GS2989
Final Data Sheet
GENDOC-052133 July 2015
9 of 20
Semtech
www.semtech.com
Rev.6
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.
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 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.
GS2989
Final Data Sheet
10 of 20
Semtech
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Rev.6
GENDOC-052133 July 2015
4.3.1 Slew Rate Selection (Rise/Fall Time Requirement)
The GS2989 supports two user-selectable output slew rates.
Control of the slew rate is determined by the setting of the SD/HD input pin.
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 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.
Table 4-3: Output Disable
DISABLE1
DISABLE2
SDO1/SDO1
SDO2/SDO2
0
0 or Floating
All Chip Power Down
0
1
0 or Floating
1
High-Impedance
Operational
Operational
High-Impedance
Operational
1 or Floating
1 or Floating
Floating
Operational
Floating
Operational
High-Impedance
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.
GS2989
Final Data Sheet
11 of 20
Semtech
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Rev.6
GENDOC-052133 July 2015
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 GS2989 can be adjusted by changing the value of the RSET
resistor as shown in Figure 4-1. For an 800mV output with a nominal 7ꢀ tolerance, a
pp
value of 750Ω is required. A 1ꢀ 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 R pin, and connected directly to the VCC
SET
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.
GS2989
Final Data Sheet
12 of 20
Semtech
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Rev.6
GENDOC-052133 July 2015
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: V
vs. RSET
OUT
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.
GS2989
Final Data Sheet
13 of 20
Semtech
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Rev.6
GENDOC-052133 July 2015
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 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. Semtech
recommends using Balance mode when measuring ORL with 2.5V termination voltage.
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
GS2989
Final Data Sheet
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Semtech
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Rev.6
GENDOC-052133 July 2015
•
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 Semtech’s GS2989 Design Guide
(Doc ID 52070).
5.2 Typical Application Circuit
VCC
**Please refer to section 4.2.
VCC_Term
10n
10n
GND
5n6*
10n
75R
GND
12
11
4u7
4u7
SDO1
SDO1
75R
4u7
4u7
75R
2
3
DDI
DDI
VCC_Term
10n
5n6*
75R
75R
GS2989
GND
VCC
5n6*
5
10
9
4u7
4u7
RSET
SDO2
SDO2
75R
75R
R*
VCC_Term
10n
5n6*
75R
GND
*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
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.
Figure 5-1: Typical Application Circuit
GS2989
Final Data Sheet
15 of 20
Semtech
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Rev.6
GENDOC-052133 July 2015
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
Figure 6-1: Package Dimensions
GS2989
Final Data Sheet
16 of 20
Semtech
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Rev.6
GENDOC-052133 July 2015
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
Figure 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
Table 6-1: Packaging Data
Parameter
Value
16-pin QFN / 4mm x 4mm /
0.65mm
Package type / dimensions / pad pitch
Package Drawing Reference
JEDEC M0220
3
Moisture Sensitivity Level
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
11.0°C/W
Yes
Psi, Ψ
Pb-free and RoHS compliant, Halogen-free
GS2989
Final Data Sheet
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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 6-3.
Temperature
60-150 sec.
20-40 sec.
260°C
250°C
3°C/sec max
217°C
6°C/sec max
200°C
150°C
25°C
Time
60-180 sec. max
8 min. max
Figure 6-3: Maximum Pb-free Solder Reflow Profile (Preferred)
6.5 Marking Diagram
Pin 1 Indicator
GS2989
XXXX - Last 4 digits of Assembly Lot
YYWW - Date Code
XXXXE3
YY -
2-digit year
2-digit week number
YYWW
WW -
Figure 6-4: Marking Diagram
GS2989
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6.6 Ordering Information
Table 6-2: Ordering Information
Part Number
Package
Temperature Range
GS2989
GS2989
GS2989-INE3
16-pin QFN
-40°C to 85°C
16-pin QFN
250pc Reel
GS2989-INTE3
GS2989-INTE3Z
-40°C to 85°C
-40°C to 85°C
16-pin QFN
2,500pc Reel
GS2989
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Final Data Sheet
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IMPORTANT NOTICE
Information relating to this product and the application or design described herein is believed to be reliable, however such information is
provided as a guide only and Semtech assumes no liability for any errors in this document, or for the application or design described herein.
Semtech reserves the right to make changes to the product or this document at any time without notice. Buyers should obtain the latest relevant
information before placing orders and should verify that such information is current and complete. Semtech warrants performance of its
products to the specifications applicable at the time of sale, and all sales are made in accordance with Semtech’s standard terms and conditions
of sale.
SEMTECH PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS,
DEVICES OR SYSTEMS, OR IN NUCLEAR APPLICATIONS IN WHICH THE FAILURE COULD BE REASONABLY EXPECTED TO RESULT IN PERSONAL
INJURY, LOSS OF LIFE OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. INCLUSION OF SEMTECH PRODUCTS IN SUCH APPLICATIONS IS
UNDERSTOOD TO BE UNDERTAKEN SOLELY AT THE CUSTOMER’S OWN RISK. Should a customer purchase or use Semtech products for any such
unauthorized application, the customer shall indemnify and hold Semtech and its officers, employees, subsidiaries, affiliates, and distributors
harmless against all claims, costs damages and attorney fees which could arise.
The Semtech name and logo are registered trademarks of the Semtech Corporation. All other trademarks and trade names mentioned may be
marks and names of Semtech or their respective companies. Semtech reserves the right to make changes to, or discontinue any products
described in this document without further notice. Semtech makes no warranty, representation or guarantee, express or implied, regarding the
suitability of its products for any particular purpose. All rights reserved.
© Semtech 2015
Contact Information
Semtech Corporation
200 Flynn Road, Camarillo, CA 93012
Phone: (805) 498-2111, Fax: (805) 498-3804
www.semtech.com
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