DS10BR150 1.0 Gbps LVDS Buffer / Repeater General Description Features The DS10BR150 is a single channel 1.0 Gbps LVDS buffer optimized for high-speed signal transmission over lossy FR-4 printed circuit board backplanes and balanced cables. Fully differential signal paths ensure exceptional signal integrity and noise immunity. Wide input common mode range allows the receiver to accept signals with LVDS, CML and LVPECL levels; the output levels are LVDS. A very small package footprint requires a minimal space on the board while the flow-through pinout allows easy board layout. The differential inputs and outputs are internally terminated with a 100Ω resistor to lower device input and output return losses, reduce component count and further minimize board space. ■ DC - 1.0 Gbps low jitter, high noise immunity, low power operation ■ On-chip 100Ω input and output termination minimizes insertion and return losses, reduces component count and minimizes board space ■ 7 kV ESD on LVDS I/O pins protects adjoining components ■ Small 3 mm x 3 mm 8-LLP space saving package Applications ■ Clock and data buffering ■ OC-12 / STM-4 ■ FireWire 800 Typical Application 30001710 © 2007 National Semiconductor Corporation 300017 www.national.com DS10BR150 1.0 Gbps LVDS Buffer / Repeater November 8, 2007 DS10BR150 Block Diagram 30001701 Pin Diagram 30001702 Pin Descriptions Pin Name Pin Name Pin Type Pin Description NC 1 NA "NO CONNECT" pin. IN+ 2 Input Non-inverting LVDS input pin. IN- 3 Input Inverting LVDS input pin. NC 4 NA "NO CONNECT" pin. NC 5 NA "NO CONNECT" pin. OUT- 6 Output Inverting LVDS output pin. OUT+ 7 Output Non-inverting LVDS Output pin. VCC 8 Power Power supply pin. GND DAP Power Ground pad (DAP - die attach pad) Ordering Code NSID Function DS10BR150TSD Buffer / Repeater www.national.com 2 If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) −0.3V to +4V LVDS Input Voltage (IN+, IN−) −0.3V to +4V LVDS Differential Input Voltage ((IN+) - (IN−)) 0V to 1V LVDS Output Voltage (OUT+, OUT−) −0.3V to (VCC +0.3V) LVDS Differential Output Voltage ((OUT+) - (OUT−)) 0V to 1V LVDS Output Short Circuit Current 5 ms Duration Junction Temperature +150°C Storage Temperature Range −65°C to +150°C Lead Temperature Range Soldering (4 sec.) +260°C Maximum Package Power Dissipation at 25°C SDA Package 2.08W Derate SDA Package 16.7 mW/°C above +25°C θJA +60.0°C/W θJC ESD Susceptibility HBM +12.3°C/W ≥7 kV ≥250V ≥1250V MM CDM Note 1: Human Body Model, applicable std. JESD22-A114C Note 2: Machine Model, applicable std. JESD22-A115-A Note 3: Field Induced Charge Device Model, applicable std. JESD22-C101-C Recommended Operating Conditions Supply Voltage (VCC) Receiver Differential Input Voltage (VID) Operating Free Air Temperature (TA) Min 3.0 0 Typ 3.3 Max 3.6 1 Units V V −40 +25 +85 °C DC Electrical Characteristics Over recommended operating supply and temperature ranges unless otherwise specified. (Notes 5, 6, 7) Symbol Parameter Conditions Min Typ Max Units 250 350 450 mV 35 mV 1.375 V 35 mV LVDS OUTPUT DC SPECIFICATIONS (OUT+, OUT-) VOD Differential Output Voltage ΔVOD Change in Magnitude of VOD for Complimentary Output States VOS Offset Voltage RL = 100Ω -35 1.05 1.2 ΔVOS Change in Magnitude of VOS for Complimentary Output States RL = 100Ω IOS Output Short Circuit Current (Note 8) OUT to GND -30 -50 mA OUT to VCC 7.5 50 mA -35 COUT Output Capacitance Any LVDS Output Pin to GND 1.2 pF ROUT Output Termination Resistor Between OUT+ and OUT- Pins 100 Ω LVDS INPUT DC SPECIFICATIONS (IN+, IN-) VID Input Differential Voltage 0 VCM = +0.05V or VCC-0.05V VTH Differential Input High Threshold VTL Differential Input Low Threshold VCMR Common Mode Voltage Range VID = 100 mV IIN Input Current VIN = 3.6V or 0V VCC = 3.6V or 0V CIN Input Capacitance RIN Input Termination Resistor 0 −100 Between IN+ and IN- Pins 1 V +100 mV 0 0.05 ±1 mV VCC 0.05 V ±10 μA 1.7 pF 100 Ω SUPPLY CURRENT ICCD Total Supply Current 16 3 21 mA www.national.com DS10BR150 Package Thermal Resistance Absolute Maximum Ratings (Note 4) DS10BR150 AC Electrical Characteristics (Note 9) Over recommended operating supply and temperature ranges unless otherwise specified. (Notes 5, 7) Symbol Parameter Conditions Min Typ Max Units 380 600 ps 410 600 ps LVDS OUTPUT AC SPECIFICATIONS (OUT+, OUT-) tPHLD2 Differential Propagation Delay High to Low tPLHD2 Differential Propagation Delay Low to High tSKD1 Pulse Skew |tPLHD − tPHLD| (Note 10) 30 150 ps tSKD2 Part to Part Skew (Note 11) 45 160 ps tLHT Rise Time 165 400 ps tHLT Fall Time 155 400 ps RL = 100Ω RL = 100Ω JITTER PERFORMANCE (Figure 5) tDJ tRJ tTJ Deterministic Jitter (Peak-to-Peak Value ) (Note 13) VID = 350 mV VCM = 1.2V K28.5 (NRZ) 622 Mbps 12 39 ps 1.06 Gbps 15 42 ps Random Jitter (RMS Value) (Note 12) VID = 350 mV VCM = 1.2V Clock (NRZ) 311 MHz 0.6 1.3 ps 503 MHz 0.6 1.1 ps Total Jitter (Peak to Peak Value) (Note 14) VID = 350 mV VCM = 1.2V PRBS-23 (NRZ) 622 Mbps 0.02 0.04 UIP-P 1.06 Gbps 0.02 0.05 UIP-P Note 4: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in the Recommended Operating Conditions is not implied. The Recommended Operating Conditions indicate conditions at which the device is functional and the device should not be operated beyond such conditions. Note 5: The Electrical Characteristics tables list guaranteed specifications under the listed Recommended Operating Conditions except as otherwise modified or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not guaranteed. Note 6: Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground except VOD and ΔVOD. Note 7: Typical values represent most likely parametric norms for VCC = +3.3V and TA = +25°C, and at the Recommended Operation Conditions at the time of product characterization and are not guaranteed. Note 8: Output short circuit current (IOS) is specified as magnitude only, minus sign indicates direction only. Note 9: Specification is guaranteed by characterization and is not tested in production. Note 10: tSKD1, |tPLHD − tPHLD|, is the magnitude difference in differential propagation delay time between the positive going edge and the negative going edge of the same channel. Note 11: tSKD2, Part to Part Skew, is defined as the difference between the minimum and maximum specified differential propagation delays. This specification applies to devices at the same VCC and within 5°C of each other within the operating temperature range. Note 12: Measured on a clock edge with a histogram and an acummulation of 1500 histogram hits. Input stimulus jitter is subtracted geometrically. Note 13: Tested with a combination of the 1100000101 (K28.5+ character) and 0011111010 (K28.5- character) patterns. Input stimulus jitter is subtracted algebraically. Note 14: Measured on an eye diagram with a histogram and an acummulation of 3500 histogram hits. Input stimulus jitter is subtracted. www.national.com 4 DS10BR150 DC Test Circuits 30001720 FIGURE 1. Differential Driver DC Test Circuit AC Test Circuits and Timing Diagrams 30001721 FIGURE 2. Differential Driver AC Test Circuit 30001722 FIGURE 3. Propagation Delay Timing Diagram 30001723 FIGURE 4. LVDS Output Transition Times 5 www.national.com DS10BR150 30001729 FIGURE 5. Jitter Measurements Test Circuit www.national.com 6 INPUT INTERFACING The DS10BR150 accepts differential signals and allows simple AC or DC coupling. With a wide common mode range, the DS10BR150 can be DC-coupled with all common differential drivers (i.e. LVPECL, LVDS, CML). The following three figures illustrate typical DC-coupled interface to common differential drivers. Note that the DS10BR150 inputs are internally terminated with a 100Ω resistor. 30001711 Typical LVDS Driver DC-Coupled Interface to DS10BR150 Input 30001712 Typical CML Driver DC-Coupled Interface to DS10BR150 Input 30001713 Typical LVPECL Driver DC-Coupled Interface to DS10BR150 Input 7 www.national.com DS10BR150 Device Operation DS10BR150 OUTPUT INTERFACING The DS10BR150 outputs signals are compliant to the LVDS standard. It can be DC-coupled to most common differential receivers. The following figure illustrates typical DC-coupled interface to common differential receivers and assumes that the receivers have high impedance inputs. While most differential receivers have a common mode input range that can accomodate LVDS compliant signals, it is recommended to check respective receiver's data sheet prior to implementing the suggested interface implementation. 30001714 Typical DS10BR150 Output DC-Coupled Interface to an LVDS, CML or LVPECL Receiver www.national.com 8 DS10BR150 Typical Performance 30001730 30001731 A 622 Mbps NRZ PRBS-7 Output Eye Diagram V:100 mV / DIV, H:200 ps / DIV A 1062.5 Mbps NRZ PRBS-7 Output Eye Diagram V:100 mV / DIV, H:150 ps / DIV 30001732 30001733 Total Jitter as a Function of Input Amplitude Total Jitter as a Function of Input Amplitude 9 www.national.com DS10BR150 Physical Dimensions inches (millimeters) unless otherwise noted Order Number DS10BR150TSD NS Package Number SDA08A (See AN-1187 for PCB Design and Assembly Recommendations) www.national.com 10 DS10BR150 Notes 11 www.national.com DS10BR150 1.0 Gbps LVDS Buffer / Repeater Notes For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Design Support Amplifiers www.national.com/amplifiers WEBENCH www.national.com/webench Audio www.national.com/audio Analog University www.national.com/AU Clock Conditioners www.national.com/timing App Notes www.national.com/appnotes Data Converters www.national.com/adc Distributors www.national.com/contacts Displays www.national.com/displays Green Compliance www.national.com/quality/green Ethernet www.national.com/ethernet Packaging www.national.com/packaging Interface www.national.com/interface Quality and Reliability www.national.com/quality LVDS www.national.com/lvds Reference Designs www.national.com/refdesigns Power Management www.national.com/power Feedback www.national.com/feedback Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www.national.com/led PowerWise www.national.com/powerwise Serial Digital Interface (SDI) www.national.com/sdi Temperature Sensors www.national.com/tempsensors Wireless (PLL/VCO) www.national.com/wireless THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. 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