GS9077 HD-LINX® III SD-SDI Cable Driver
GS9077 Data Sheet Features • • • • • • • • SMPTE 344M and SMPTE 259M compliant Dual coaxial cable driving outputs Selectable power down mode 50Ω differential PECL input Pb-free and RoHS compliant Seamless interface to other HD-LINX® III family products Single 3.3V power supply operation Operating temperature range: 0°C to 70°C Description The GS9077 is a high-speed BiCMOS integrated circuit designed to drive one or two 75Ω co-axial cables. The GS9077 may drive data rates up to 540Mb/s and provides a disable pin that may be used to power down the output stage. The GS9077 accepts a LVPECL level differential input that may be AC coupled. External biasing resistors at the inputs are not required. Power consumption is typically 168mW using a 3.3V power supply. The GS9077 is Pb-free, and the encapsulation compound does not contain halogenated flame retardant. This component and all homogeneous subcomponents are RoHS compliant.
Applications • SMPTE 344M and SMPTE 259M Coaxial Cable Serial Digital Interfaces.
BANDGAP REFERENCE AND BIASING CIRCUIT
RSET
DDI DDI
INPUT DIFFERENTIAL PAIR
SDO OUTPUT STAGE & CONTROL SDO
DISABLE
Functional Block Diagram
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GS9077 Data Sheet
Contents
Features ........................................................................................................................1 Applications...................................................................................................................1 Description ....................................................................................................................1 1. Pin Out ......................................................................................................................3 1.1 Pin Assignment ...............................................................................................3 1.2 Pin Descriptions ..............................................................................................3 2. Electrical Characteristics ...........................................................................................4 2.1 Absolute Maximum Ratings ............................................................................4 2.2 DC Electrical Characteristics ..........................................................................4 2.3 AC Electrical Characteristics ...........................................................................5 2.4 Solder Reflow Profiles .....................................................................................6 3. Input / Output Circuits ...............................................................................................7 4. Detailed Description ..................................................................................................8 4.1 Input Interfacing ..............................................................................................8 4.2 Output Interfacing ...........................................................................................8 4.2.1 Output Amplitude (RSET) ......................................................................9 4.2.2 Output Disable .......................................................................................9 4.3 Output Return Loss Measurement ..................................................................9 5. Application Information............................................................................................10 5.1 PCB Layout ...................................................................................................10 5.2 Typical Application Circuit .............................................................................10 6. Package & Ordering Information .............................................................................11 6.1 Package Dimensions ....................................................................................11 6.2 Recommended PCB Footprint ......................................................................12 6.3 Packaging Data .............................................................................................12 6.4 Marking Diagram ...........................................................................................13 6.5 Ordering Information .....................................................................................13 7. Revision History ......................................................................................................14
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GS9077 Data Sheet
1. Pin Out
1.1 Pin Assignment
NC NC NC NC 13 12 SDO 11 GS9077 (top view) VEE 3 10 NC
16 DDI 1
15
14
DDI
2
SDO
RSET
4 5 NC 6 DISABLE 7 RSVD 8
9
VCC
Center Pad (bottom of package)
Figure 1-1: 16-Pin QFN
1.2 Pin Descriptions
Table 1-1: Pin Descriptions Pin Number
1,2 3 4 5,8,10,13,14, 15,16 6
Name
DDI, DDI VEE RSET NC DISABLE
Timing
Analog – Analog – Non Synchronous – – Analog –
Type
Input Power Input – Input
Description
Serial digital differential input. Most negative power supply connection. Connect to GND. External output amplitude control resistor. No Connect. Not bonded internally. Serial output disable. When asserted LOW, the SDO/SDO output driver is powered off. SDO/SDO will float to VCC through the pull-up resistor. Do not connect. Most positive power supply connection. Connect to +3.3V. Serial digital differential output. Connect to most negative power supply plane following the recommendations in Recommended PCB Footprint on page 12.
7 9 11,12 –
RSVD VCC SDO, SDO Center Pad
Reserved Power Output Power
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GS9077 Data Sheet
2. Electrical Characteristics
2.1 Absolute Maximum Ratings
Parameter
Supply Voltage Input ESD Voltage Storage Temperature Range Input Voltage Range (any input) Operating Temperature Range Solder Reflow Temperature
Value
-0.5V to 3.6 VDC 4kV -50°C < Ts < 125°C -0.3 to (VCC +0.3)V 0°C to 70°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 2-1: DC Electrical Characteristics
VCC = 3.3V ±5%; TA = 0°C to 70°C, unless otherwise shown
Parameter
Supply Voltage Power Consumption
Symbol
VCC PD
Conditions
– TA = 25°C, SDO/SDO enabled TA = 25°C, SDO/SDO disabled
Min
3.135 –
Typ
3.3 168
Max
3.465 –
Units
V mW
–
96
–
mW
Supply Current
Is
TA = 25°C, SDO/SDO enabled TA = 25°C, SDO/SDO disabled
–
51
–
mA
–
29
–
mA
Output Voltage Input Voltage DISABLE Input
VCMOUT VCMIN VIH VIL
Common mode Common mode IIH
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