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GS8000 DVI / HDMI Extender
GS8000 Data Sheet Key Features
* * * * * * * * * * * extends cable length of the TMDS and DDC channels of a DVI or HDMI link DVI 1.0-compliant and HDMI 1.1-compliant input and output signalling one device supports a complete single link DVI 1.0 or HDMI interface (two devices for a dual link DVI interface) operational at TMDS rates from 252Mb/s to 1.65Gb/s supports display resolutions up to UXGA at 60Hz in 24-bit true colour pixel format integrated user-tunable input termination resistors automatic identification of link inactivity with carrier detect output output signal swing adjustable from 200mV to 2000mV differential into 100 load output enable function superior noise immunity small footprint (44-pin QFN)
Description The GS8000 is Gennum's DVI 1.0-compliant and HDMI 1.1-compliant automatic cable extender. When used in front of a DVI/HDMI receiver, it produces a receive solution with longer cable length. A DVI link of 20 to 30 metres at UXGA 60Hz (162Mb/s) can be realized with the GS8000 provided the DVI transmitter is within the DVI specification for jitter and voltage swing and that high quality DVI cable is used. The GS8000 contains an Output Enable input and Carrier Detect output to allow for auto muting of the clock and data outputs upon link inactivity. Excellent power supply and common mode noise rejection is employed to ensure robust operation in noisy environments. The differential outputs are adjustable and compatible with the DVI 1.0 and HDMI 1.1 receiver specifications for input common mode voltage and swing. The GS8000 is designed in a CMOS process requiring a 3.3V power supply. The analog I/O and digital core power supply voltages may be individually provided.
Applications A DVI or HDMI input that will only be connected to a DVI output with launch amplitude between 800mV and 1200mV differential. Since many DVI graphics cards transmit at amplitudes outside this range, the GS8000 is not recommended for a generic DVI input.
OE
Signal Monitor & Control oe
SCDT
RXC RXC
LONG REACH
TM
TMDS
TXC TXC
RX0 RX0
LONG REACH
TM
TX0 TMDS TX0
RX1 RX1
LONG REACH
TM
TX1 TMDS TX1
RX2 RX2
LONG REACH
TM
TMDS
TX2 TX2
DDC_SDA DDC_SCL
LONG REACH
TM
DDC
GS8000 Functional Block Diagram
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GS8000 Data Sheet
Contents
Key Features .................................................................................................................1 Applications...................................................................................................................1 Description ....................................................................................................................1 1. Pin Out ......................................................................................................................3 1.1 Pin Assignment ...............................................................................................3 1.2 Pin Descriptions ..............................................................................................3 2. Electrical Characteristics ...........................................................................................5 2.1 DC Electrical Characteristics ..........................................................................5 2.2 AC Electrical Characteristics ...........................................................................7 3. Detailed Description ..................................................................................................9 3.1 Differential Inputs ............................................................................................9 3.2 LONG REACHTM DVI / HDMI .........................................................................9 3.2.1 LONG REACHTM TMDS ........................................................................9 3.2.2 LONG REACHTM DDC...........................................................................9 3.3 Differential Outputs .......................................................................................10 3.4 Signal Monitoring and Control .......................................................................10 3.4.1 Sync Detect Output..............................................................................10 3.4.2 Output Enable......................................................................................10 3.5 System Considerations .................................................................................11 3.5.1 Device Power Up .................................................................................11 3.5.2 ESD Protection ....................................................................................11 3.5.3 Cable Use ............................................................................................11 3.5.4 Complete LONG REACHTM Receive Solution .....................................12 4. Application Reference Design .................................................................................13 4.1 Typical Application Circuit .............................................................................13 4.2 ESD Diodes ..................................................................................................14 4.3 PCB Layout ...................................................................................................14 5. References ..............................................................................................................14 6. Package & Ordering Information .............................................................................15 6.1 Package Dimensions ....................................................................................15 6.2 Ordering Information .....................................................................................15 7. Revision History ......................................................................................................16
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GS8000 Data Sheet
1. Pin Out
1.1 Pin Assignment
DDC_SDA DDC_GND OUT_SWING DDC_VDD DDC_SCL
A_GND
A_VDD
NC
RX2 RX2 GND GND RX1 RX1 VDD VDD RX0 RX0 GND
1
34
GNDQ
TX2 TX2 VDDQ VDDQ TX1 TX1 GNDQ GNDQ TX0 TX0
23
VDD
GS8000 (Top View)
NC
12
VDDQ
GND
RXC
RXC
VDD
EXT_RES
D_GND
OE
SCDT
D_VDD
TXC
TXC
1.2 Pin Descriptions
Table 1-1: Pin Descriptions Pin Number
1, 2 3, 4, 11, 12 7, 8, 15, 44 5, 6 9, 10 13, 14 16
Name
RX2, RX2 GND VDD RX1, RX1 RX0, RX0 RXC, RXC EXT_RES
Timing
Analog Analog Analog Analog Analog Analog Non Synchronous
Type
Input Power Power Input Input Input Input
Description
Transition minimized differential signal (TMDS) data input 2. Differential input buffer ground connection. Power supply for the differential input buffers. Connect to +3.3V DC. Transition minimized differential signal (TMDS) data input 1. Transition minimized differential signal (TMDS) data input 0. Transition minimized differential signal (TMDS) input clock. Termination for differential inputs. An external resistor connected from this input to D_GND is used to set the input termination. Use 500 to set the input termination to 50.
17
D_GND
Non Synchronous
Power
Digital core ground connection.
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GS8000 Data Sheet
Table 1-1: Pin Descriptions (Continued) Pin Number
18
Name
OE
Timing
Non Synchronous
Type
Input
Description
CONTROL SIGNAL INPUT Output enable (active HIGH). When set HIGH, the differential signal outputs will be active. When set LOW, the differential signal outputs will mute.
19
SCDT
Non Synchronous
Output
CONTROL SIGNAL OUTPUT Sync detect (active HIGH). Will be set HIGH when a valid signal has been detected at the RXC/RXC pins. NOTE: The SCDT pin can be connected to the OE pin to enable an auto mute upon link inactivity function.
20 21, 22 23, 30, 31 24, 25 26, 27, 34 28, 29 32, 33 35
D_VDD TXC, TXC VDDQ TX0, TX0 GNDQ TX1, TX1 TX2, TX2 OUT_SWI NG
Non Synchronous Analog Analog Analog Analog Analog Analog Analog
Power Output Power Output Power Output Output Input
Digital core power supply. Connect to +3.3V DC. Transition minimized differential signal (TMDS) output clock. Power supply for the differential output cable drivers. Connect to +3.3V DC. Transition minimized differential signal (TMDS) data output 0. Differential output cable driver ground connection. Transition minimized differential signal (TMDS) data output 1. Transition minimized differential signal (TMDS) data output 2. Differential output signal amplitude. An external 1% resistor connected from this input to GNDQ is used to set the differential output signal amplitude. Use 2k to set the differential output signal swing to 1V.
36, 37 38 39 40 41 42 43
NC DDC_GND DDC_VDD DDC_SCL DDC_SDA A_GND A_VDD
- Analog Analog Non Synchronous Non Synchronous Analog Analog
- Power Power I/O I/O Power Power
No connection - leave floating. LONG REACHTM DDC ground connection. LONG REACHTM DDC power supply. Connect to +5V DC. Connect to display data channel (DDC) buffered serial clock (SCL). Connect to display data channel (DDC) buffered serial data (SDA). Analog GND connection. Analog power supply. Connect to +3.3V DC.
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GS8000 Data Sheet
2. Electrical Characteristics
Table 2-1: Absolute Maximum Ratings Parameter
Supply Voltage Input Voltage Range (any input) Operating Temperature Range Storage Temperature Range Lead Temperature (soldering 10 sec.)
Value
-0.3V to +3.6V -2.0V to +5.25V -20C to 85C -50C to 125C 260C
2.1 DC Electrical Characteristics
Table 2-2: DC Electrical Characteristics
VDD = 3.0V to 3.3V, TA = 0C to 70C, unless otherwise shown
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Test Level
Notes
System
Operating Temperature Range TA - 0 -20 Supply Voltage Supply Voltage for LONG REACHTM DDC Supply Current VDD DDC_VDD ID - - VDD = 3.3V, TA = 25C O/P Swing = 1000mV Supply Current for LONG REACHTM DDC System Power - PD DDC_VDD = 5V VDD = 3.3V, TA = 25C O/P Swing = 1000mV ESD Protection - All pins 2 - - kV - 3 - - - 519 15 - mA mW 1 5 - - 3.0 4.75 - 25 - 3.3 5.0 157 70 85 3.6 5.25 - C C V V mA - - 1 1 1 1 2 1 1 -
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GS8000 Data Sheet
Table 2-2: DC Electrical Characteristics (Continued)
VDD = 3.0V to 3.3V, TA = 0C to 70C, unless otherwise shown
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Test Level
Notes
Digital I/O
Input Voltage, Logic LOW (OE) Input Voltage, Logic HIGH (OE) Output Voltage, Logic LOW (SCDT) Output Voltage, Logic HIGH (SCDT) VIL VIH VOL VOH - - Sync Detect Current = +1.25mA Sync Detect Current = -1.25mA - 2.0 - 2.4 - - - - 0.70 - 0.4 - V V V V 1 1 1 1 - - - -
Differential Signal Inputs
Common Mode Input Voltage Range Single Ended Standby Input Voltage VCMIN - - Transmitter Disabled or Disconnected VDD-0.4 - - VDD VDD - V V 6,7 9 - -
Differential Signal Outputs
Common Mode Output Voltage Range Single Ended Standby Output Voltage Single Ended High Level Output Voltage TEST LEVELS 1. Production test at room temperature and nominal supply voltage with guardbands for supply and temperature ranges. 2. Production test at room temperature and nominal supply voltage with guardbands for supply and temperature ranges using correlated test. 3. Production test at room temperature and nominal supply voltage. 4. QA sample test. 5. Calculated result based on Level 1, 2, or 3. 6. Not tested. Guaranteed by design simulations. 7. Not tested. Based on characterization of nominal parts. 8. Not tested. Based on existing design/characterization data of similar product. 9. Indirect test. VCMOUT - - - 50 Loads, Output Muted 50 Loads VDD-0.5 - - NOTES 1. All DC and AC electrical parameters within specification. 2. Guaranteed functional. 3. MIL STD 883 ESD protection is applied to all pins on the device. 4. Compatible with far end termination at 3.3V or 1.8V. - VDD VDD VDD - - - V V 6,7 1 1 4 - -
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GS8000 Data Sheet
2.2 AC Electrical Characteristics
Table 2-3: AC Electrical Characteristics
VDD = 3.0V to 3.6V, TA = 0C to 70C, unless otherwise shown
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Test Level
Notes
System
Output High Impedance Response Time Additive Jitter tRHIGHZ tIJ OE = LOW 1650Mb/s, 2m cable length 1650Mb/s, 20m cable length DDC Bus Rate - Up to 10k pull-up resistors - - - - 20 - - - - 303 303 400 ns ps ps kHz - 1 1 2 - 2 2 -
Differential Signal Input
Serial Input Date Rate Differential Input Resistance Input Capacitance DRRX RIN CIN - - - 250 - - - 100 2 1650 - - Mb/s pF - 1 - - 1 1
Differential Signal Output -- Data Channels
Serial Output Data Rate Serial Output Rise/Fall Time Mismatch in Rise/Fall Time Serial Output Overshoot Serial Output Undershoot Inter-Channel Skew Differential Output Signal Swing DRTX tr, tf - - - - VTX - 20% ~ 80% - Single-Ended, Normalized to Differential p-p Single-Ended, Normalized to Differential p-p 1650 Mbps, 0m cable RLOAD = 100 250 - - - - - 200 - 145 - 9.5 3.1 0 - 1650 - 5 - - - 2000 Mb/s ps % % % ps mVp-p - 6,7,9 7 7 7 6 2 - - - 3 3 - -
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GS8000 Data Sheet
Table 2-3: AC Electrical Characteristics (Continued)
VDD = 3.0V to 3.6V, TA = 0C to 70C, unless otherwise shown
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Test Level
Notes
Differential Signal Output -- Clock Channel
Serial Output Data Rate Serial Output Rise/Fall Time Mismatch in Rise/Fall Time Duty-Cycle Distortion Differential Output Signal Swing Range - tr, tf - - VTXC - 20% ~ 80% - - RLOAD = 100 Range controlled using external resistor 25 - - - 200 - 145 - - - 165 - 5 2 2000 MHz ps % % mV - 6,7,9 7 7 2 - - - - -
TEST LEVELS 1. Production test at room temperature and nominal supply voltage with guardbands for supply and temperature ranges. 2. Production test at room temperature and nominal supply voltage with guardbands for supply and temperature ranges using correlated test. 3. Production test at room temperature and nominal supply voltage. 4. QA sample test. 5. Calculated result based on Level 1, 2, or 3. 6. Not tested. Guaranteed by design simulations. 7. Not tested. Based on characterization of nominal parts. 8. Not tested. Based on existing design/characterization data of similar product. 9. Indirect test.
NOTES 1. Includes pin and bonding parasitics. 2. See Typical Additive Jitter vs. Cable Length graph below 3. Based on Gennum's characterization board
0.9 0.8 0.7
1650 Mb/s 1080 Mb/s
650 Mb/s 0.6 Jitter (UI) 0.5 0.4 252 Mb/s 0.3 0.2 0.1 0 10 20 Cable Length (m) 30
379 Mb/s
Figure 2-1: Typical Additive Jitter vs. Cable Length
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GS8000 Data Sheet
3. Detailed Description
3.1 Differential Inputs
The GS8000 contains four current mode differential signal input buffers. These allow the device to be connected to a DVI 1.0 compliant data stream consisting of three transition minimized differential signals (TMDS) and a clock signal at one tenth the data rate. All input buffers have internal user programmable input termination pull-up resistors. A resistor value of 500 should be connected between the EXT_RES pin and D_GND to set the input termination to 50. The input buffers use a separate power supply of +3.3V DC (VDD and GND) and have a wide common mode operating point.
3.2 LONG REACHTM DVI / HDMI
3.2.1 LONG REACHTM TMDS
Gennum's patented DVI technology restores the received signals to the input level defined in the DVI 1.0 and HDMI 1.1 specifications. Four gain stages are provided, three of which extend TMDS data at rates from 250Mb/s to 1.65Gb/s. The fourth gain stage is optimized to extend the clock signal at one tenth the received TMDS data rate. These stages operate under the assumption that the input signal was launched at an amplitude of between 800mV and 1200mV differential.
3.2.2 LONG REACHTM DDC
The DDC Extend block manages DDC traffic in both directions by restoring incoming signals and boosting outgoing signals to meet the DDC specification. Connect the DDC_SDA and DDC_SCL pins to the DDC bus at the closest location to the GS8000. See Figure 3-2: LONG REACHTM DVI or HDMI Receive Solution. NOTE: If a level shifter is necessary, the GS8000 must be placed on the 5V side (connector side) as shown in Figure 3-2: LONG REACHTM DVI or HDMI Receive Solution. NOTE: The 5V present on the DVI and HDMI connectors can be significantly reduced over long ranges of cable. Therefore, it is recommended that this voltage not be used as the supply voltage for the LONG REACHTM DDC.
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GS8000 Data Sheet
3.3 Differential Outputs
The GS8000 contains four current mode differential signal output buffers capable of driving a DVI 1.0-compliant or HDMI 1.1-compliant receiver. The TMDS outputs are compatible with the DVI 1.0 or HDMI 1.1 specifications for input common mode and swing. The signal swing of each output is adjustable from 200mV to 2000mV differential for a 100 load. An external 1% resistor connected from the OUT_SWING pin to GNDQ sets the differential output signal amplitude. NOTE: The differential outputs are designed to interface directly to a DVI 1.0-compliant or HDMI 1.1-compliant receiver. They are not buffered to drive any cable. All differential outputs can be muted by setting the OE pin LOW. In this case, the output buffers will become high impedance and device power will be reduced. The output buffers use a separate power supply of +3.3V DC at the VDDQ and GNDQ pins.
3.4 Signal Monitoring and Control
The signal monitoring and control block analyzes the signal received at the RXC and RXC pins.
3.4.1 Sync Detect Output
When a valid signal is detected at the RXC/RXC pins, the sync detect (SCDT) output pin will be set HIGH.
3.4.2 Output Enable
The GS8000's differential signal outputs may be muted by setting the OE pin LOW. This causes the output buffers to become high impedance. To implement an auto mute on loss of input function, the SCDT output pin can be connected externally to the OE input.
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GS8000 Data Sheet
3.5 System Considerations
3.5.1 Device Power Up
Because the GS8000 was designed to operate in a multi-volt environment, any power up sequence is allowed. The internal core and differential signal I/O buffers may be powered up in any order. Device pins may also be driven prior to power up without causing damage.
3.5.2 ESD Protection
The GS8000 has 2kV ESD protection on all pins. In addition, the device was designed to work with ESD diodes on the input connectors. These external diodes work with the chip to significantly increase overall system ESD protection. The ESD diodes used in Gennum's Application Reference Design (4.2 ESD Diodes) provide ESD protection of greater than 8kV through air (test conducted in accordance with IEC 61000-4-2 standard "Electrostatic Discharge Immunity Test").
3.5.3 Cable Use
The GS8000 was designed for best performance when used with DVI 1.0-compliant and HDMI 1.1-compliant cables meeting the approximate loss characteristic shown in Figure 3-1: Cable Loss Characteristic.
1M 0 -10 15m -20 10M 100M 1G 10G
Attenuation (dB)
-30 30m -40 -50 50m -60 -70 -80
Frequency (Hz)
Figure 3-1: Cable Loss Characteristic
While the GS8000 will extend a range of DVI cable types and qualities, the device gives optimum performance when used to extend high-quality cable. Important parameters to consider when choosing a high quality DVI cable include inter-pair and intra-pair skew. Cable length extension is maximized when cable with low inter-pair and intra-pair skew is used. The GS8000 does not add significant amounts of intra-pair or inter-pair skew. However, the skew added by some long DVI cables can exceed the tolerance of some DVI receivers.
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GS8000 Data Sheet
3.5.4 Complete LONG REACHTM Receive Solution
Figure 3-2: LONG REACHTM DVI or HDMI Receive Solution shows a complete DVI / HDMI receive solution implementing the GS8000 with a DVI or HDMI Receiver and local EDID PROM.
HDCP Key EEPROM
RGB or YCbCr TMDS GS8000 DVI or HDMI Connector DDC_SDA DDC_SCL LEVEL SHIFTER DDC Bus *HDMI only EDID EEPROM VIDEO TMDS DVI or HDMI Receiver with HDCP CTL1-2 AUDIO* HSYNC VSYNC DE
Figure 3-2: LONG REACHTM DVI or HDMI Receive Solution
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GS8000 Data Sheet
4. Application Reference Design
4.1 Typical Application Circuit
DDC_SDA DDC_SCL 10K
10nF
5V 1K
3V3
44 43 42 41 40 39 38 37 36 35 34
DDC_VDD DDC_GND NC NC OUT_SWING GNDQ
VDD A_VDD A_GND DDC_SDA DDC_SCL
3V3 10nF
TX2 TX2 VDDQ VDDQ TX1 TX1 GNDQ GNDQ TX0 TX0 VDDQ
RX2 RX2
3V3
RX1 RX1
RX0
10nF RX0
1 2 3 4 5 6 7 8 9 10 11
RX2 RX2 GND GND RX1 RX1 VDD VDD RX0 RX0 GND
GS8000
33 32 31 30 29 28 27 26 25 24 23
TX2 TX2
TX1 TX1
TX0 TX0
GND RXC RXC VDD EXT_RES D_GND OE SCDT D_VDD TXC TXC
3V3 10nF
12 13 14 15 16 17 18 19 20 21 22
3V3
RXC RXC
500
TXC TXC
3V3 150 10nF D1
3V3
10nF 321
3V3
OE
10K
Q2 3904
Notes 1. The GS8000 must always be used with a DVI receiver. Do not concatenate two equalizers without reclocking in between. If the GS8000 is to be used directly in front of another device with internal equalization, disable the equalization on that device. 2. Adding proper decoupling capacitors between power supplies and ground is critical to the proper performance and operation of the GS8000.
Figure 4-1: Typical application circuit
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GS8000 Data Sheet
4.2 ESD Diodes
3V3 5V
A1
A1
A1
C2
C2
C2
C2
C2
C2
C2
C2
C2
A1
A1
C2
A1
A1
A1
A1
A2C1
A2C1
A2C1
A2C1
A2C1
A2C1
A2C1
A2C1
A2C1
A2C1 DDC_SCL MA157 MA157
RX0
Note: For the DDC link to be active when the device is powered down, the 5V power to the DDC ESD diodes must be supplied by the DVI transmitter.
4.3 PCB Layout
Special attention must be paid to component layout when designing DVI 1.0-compliant HDMI 1.1-compliant interfaces. The following layout recommendations are to ensure optimal performance of the GS8000. * * * * Signal traces for TMDS DATA and CLOCK channels must be 100 differential controlled impedance traces. Differential signal trace spacing should be kept consistent throughout the entire trace length. Traces should be curved to minimize impedance changes. An FR-4 dielectric may be used. The GS8000 should be placed as close as possible to the input connector, and the trace length from connector to device should be kept as short as possible. All differential signal traces should be kept on the same PCB layer as the GS8000. External ESD protection diodes should be fast switching with a small terminal capacitance (less than or equal to 2pF). Panasonic's MA157A or similar switching diodes are recommended. Placing sufficiently large power and ground planes in board layout is critical to the proper performance and operation of the GS8000.
* *
*
5. References
Digital Visual Interface -- DVI (Digital Display Working Group - Revision 1.0, 02 April 1999). HIgh-Definition Multimedia Interface -- HDMI (HDMI Licensing LLC - Revision 1.1, 20 May 2004).
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DDC_SDA
MA157
MA157 RX1
MA157 RX1
MA157 RX2
MA157 RX2
MA157 RXC
MA157 RXC
MA157
RX0
A1
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GS8000 Data Sheet
6. Package & Ordering Information
6.1 Package Dimensions
7.00 5.57+/-0.10
DETAIL B
7.00
0.50
0.27+/-0.03
SEATING PLANE
0.9+0.10 +0.03 0.02 -0.02 R0.135 0.50+/-0.10
0.50 DETAIL B
6.2 Ordering Information
Part Number
GS8000ACNE3
Package
44-PIN QFN
Temperature Range
0C to 70C
Max Pixel Clock Rate
165 MHz
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GS8000 Data Sheet
7. Revision History
Version
0
ECR
132311
Date
October 2003
Changes and/or Modifications
Modify specified values based on characterization. Turn into Preliminary Data Sheet. Modify DC Electrical characteristics and Section 3.5.2. Update package dimensions. Add note to Section 3.3 and Section 4.2. Included references to HDMI interface in text and in diagrams. Removed hyphens from LONG-REACH trademark text. Added technical information of powerplane and power supply decoupling. GS8000 has an ESD Protection of 2kV.
1
133756
June 2004
2
134675
September 2004
3
135724
May 2005
CAUTION
ELECTROSTATIC SENSITIVE DEVICES DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A STATIC-FREE WORKSTATION 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.
GENNUM CORPORATION
Mailing Address: P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 Shipping Address: 970 Fraser Drive, Burlington, Ontario, Canada L7L 5P5 Tel. +1 (905) 632-2996 Fax. +1 (905) 632-5946
GENNUM JAPAN CORPORATION
Shinjuku Green Tower Building 27F, 6-14-1, Nishi Shinjuku, Shinjuku-ku, Tokyo, 160-0023 Japan Tel. +81 (03) 3349-5501, Fax. +81 (03) 3349-5505
GENNUM UK LIMITED
25 Long Garden Walk, Farnham, Surrey, England GU9 7HX Tel. +44 (0)1252 747 000 Fax +44 (0)1252 726 523 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. GENNUM and the G logo are registered trademarks of Gennum Corporation. (c) Copyright 2002 Gennum Corporation. All rights reserved. Printed in Canada. www.gennum.com
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