19-1771; Rev 0; 9/00 Single/Dual LVDS Line Drivers with Ultra-Low Pulse Skew in SOT23 Features ♦ Low 250ps (max) Pulse Skew for High-Resolution Imaging and High-Speed Interconnect ♦ Space-Saving 8-Pin SOT23 and SO Packages ♦ Pin-Compatible Upgrades to DS90LV017/017A and DS90LV027/027A (SO Packages) ♦ Guaranteed 500Mbps Data Rate ♦ Low 22mW Power Dissipation at 3.3V (31mW for MAX9112) ♦ Conform to EIA/TIA-644 Standard ♦ Single +3.3V Supply ♦ Flow-Through Pinout Simplifies PC Board Layout ♦ Driver Outputs High Impedance when Powered Off Ordering Information ________________________Applications Laser Printers Network Switches/Routers Digital Copiers LCD Displays Cellular Phone Base Stations Backplane Interconnect Clock Distribution TEMP. RANGE PINPACKAGE TOP MARK MAX9110EKA-T -40°C to +85°C 8 SOT23-8 AADN MAX9110ESA -40°C to +85°C 8 SO MAX9112EKA-T -40°C to +85°C 8 SOT23-8 MAX9112ESA -40°C to +85°C 8 SO PART Telecom Switching Equipment — AADO — Typical Operating Circuit appears at end of data sheet. Pin Configurations/Functional Diagrams/Truth Table TOP VIEW MAX9110 MAX9110 MAX9112 MAX9112 VCC 1 8 DO- DIN 1 8 DO- VCC 1 8 DO1- DIN1 1 8 DO1- DIN 2 7 DO+ GND 2 7 DO+ DIN1 2 7 DO1+ GND 2 7 DO1+ N.C. 3 6 N.C. N.C. 3 6 N.C. DIN2 3 6 DO2+ DIN2 3 6 DO2+ GND 4 5 N.C. VCC 4 5 N.C. GND 4 5 DO2- VCC 4 5 DO2- SO DIN_ SOT23 SO SOT23 DO_+ L DO_H L H H L 0.8V < VDIN_ < 2.0V X X H = LOGIC LEVEL HIGH L = LOGIC LEVEL LOW X = UNDETERMINED ________________________________________________________________ Maxim Integrated Products 1 For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. MAX9110/MAX9112 General Description The MAX9110/MAX9112 single/dual low-voltage differential signaling (LVDS) transmitters are designed for high-speed applications requiring minimum power consumption, space, and noise. Both devices support switching rates exceeding 500Mbps while operating from a single +3.3V supply, and feature ultra-low 250ps (max) pulse skew required for high-resolution imaging applications, such as laser printers and digital copiers. The MAX9110 is a single LVDS transmitter, and the MAX9112 is a dual LVDS transmitter. Both devices conform to the EIA/TIA-644 LVDS standard. They accept LVTTL/CMOS inputs and translate them to low-voltage (350mV) differential outputs, minimizing electromagnetic interference (EMI) and power dissipation. These devices use a current-steering output stage, minimizing power consumption, even at high data rates. The MAX9110/MAX9112 are available in space-saving 8-pin SOT23 and SO packages. Refer to the MAX9111/ MAX9113 data sheet for single/dual LVDS line receivers. MAX9110/MAX9112 Single/Dual LVDS Line Drivers with Ultra-Low Pulse Skew in SOT23 ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC to GND) ..................................-0.3V to +4V Input Voltage (VDIN_ to GND).....................-0.3V to (VCC + 0.3V) Output Voltage (VDO_+, VDO_- to GND or VCC) ...-0.3V to +3.9V Output Short-Circuit Duration (DO_+, DO_- to VCC or GND) ................................Continuous ESD Protection (Human Body Model, DO_+, DO_-)..........±11kV Continuous Power Dissipation (TA = +70°C) 8-Pin SOT23 (derate 7.52mW/°C above +70°C)...........602mW 8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering,10s) ..................................+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VCC = +3.0V to +3.6V, RL = 100Ω ±1%, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25°C.) (Notes 1, 2) PARAMETER SYMBOL MIN TYP MAX UNITS Differential Output Voltage Change in Magnitude of Output Voltage for Complementary Output States Offset Voltage VOD Figure 1 250 350 450 mV ∆VOD Figure 1 0 2 35 mV VOS Figure 1 1.125 1.25 1.375 V Change in Magnitude of Offset Voltage for Complementary Output States ∆VOS Figure 1 0 2 25 mV +10 µA -20 mA Power-Off Leakage Current Short-Circuit Output Current IO(OFF) CONDITIONS VDO_ _ = 0 or VCC, VCC = 0 or open -10 DIN_ = VCC, VDO_+ = 0 or IO(SHORT) DIN_ = GND, VDO_- = 0 Input High Voltage VIH 2.0 VCC V Input Low Voltage VIL GND 0.8 V Input Current High IIH DIN_ = VCC or 2V Input Current Low IIL DIN_ = GND or 0.8V No-Load Supply Current ICC No load, DIN_ = VCC or 0 Supply Current ICC DIN_ = VCC or 0 0 10 20 µA -20 -3 0 µA mA 4.5 6 MAX9110 6.7 8 MAX9112 9.4 13 mA AC CHARACTERISTICS (VCC = +3.0V to +3.6V, RL = 100Ω ±1%, CL = 5pF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25°C.) (Notes 3, 4, 5; Figures 2, 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Differential High-to-Low Propagation Delay tPHLD 1 1.54 2.5 ns Differential Low-to-High Propagation Delay tPLHD 1 1.58 2.5 ns Differential Pulse Skew |tPHLD - tPLHD| (Note 6) tSKD1 40 250 ps Channel-to-Channel Skew (Note 7) tSKD2 70 400 ps 2 _______________________________________________________________________________________ Single/Dual LVDS Line Drivers with Ultra-Low Pulse Skew in SOT23 (VCC = +3.0V to +3.6V, RL = 100Ω ±1%, CL = 5pF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25°C.) (Notes 3, 4, 5; Figures 2, 3) PARAMETER SYMBOL Part-to-Part Skew CONDITIONS MIN TYP MAX tSKD3 (Note 8) 1 tSKD4 (Note 9) 1.5 UNITS ns High-to-Low Transition Time tTHL 0.25 0.6 1 ns Low-to-High Transition Time tTLH 0.25 0.6 1 ns Maximum Operating Frequency fMAX (Note 10) 250 MHz Note 1: Maximum and minimum limits over temperature are guaranteed by design. Devices are production tested at TA = +25°C. Note 2: By definition, current into the device is positive and current out of the device is negative. Voltages are referred to device ground except VOD. Note 3: AC parameters are guaranteed by design and characterization. Note 4: CL includes probe and fixture capacitance. Note 5: Signal generator conditions for dynamic tests: VOL = 0, VOH = 3V, f = 20MHz, 50% duty cycle, RO = 50Ω, tR ≤ 1ns, and tF ≤ 1ns (0 to 100%). Note 6: tSKD1 is the magnitude difference of differential propagation delays in a channel; tSKD1 = | tPHLD - tPLHD |. Note 7: tSKD2 is the magnitude difference of the tPLHD or tPHLD of one channel and the tPLHD or tPHLD of the other channel on the same device (MAX9112). Note 8: tSKD3 is the magnitude difference of any differential propagation delays between devices at the same VCC and within 5°C of each other. Note 9: tSKD4 is the magnitude difference of any differential propagation delays between devices operating over the rated supply and temperature ranges. Note 10: fMAX signal generator conditions: VOL = 0, VOH = +3V, frequency = 250MHz, tR ≤ 1ns, tF ≤ 1ns (0 to 100%) 50% duty cycle. Transmitter output criteria: duty cycle = 45% to 55%, VOD ≥ 250mV. Typical Operating Characteristics (VCC = +3.3V, RL = 100Ω, CL = 5pF, VIH = +3V, VIL = GND, fIN = 20MHz, TA = +25°C, unless otherwise noted.) (Figures 2, 3) 8.0 B C A MAX9110 toc02 7.2 7.1 7.0 6.9 6.8 6.7 6.6 7.0 2.0 1.8 PROPAGATION DELAY (ns) SUPPLY CURRENT (mA) 8.5 7.5 7.3 CURRENT SUPPLY (mA) A: VCC = +3.0V B: VCC = +3.3V C: VCC = +3.6V 9.0 7.4 MAX9110 toc01 9.5 DIFFERENTIAL PROPAGATION DELAY vs. SUPPLY VOLTAGE SUPPLY CURRENT vs. TEMPERATURE MAX9110 toc03 MAX9110 SUPPLY CURRENT vs. INPUT FREQUENCY tPLHD 1.6 tPHLD 1.4 1.2 1.0 6.5 0.8 6.4 6.5 1 100 10k 1M INPUT FREQUENCY (Hz) 100M 1G -40 -15 10 35 TEMPERATURE (°C) 60 85 3.0 3.1 3.2 3.3 3.4 3.5 3.6 SUPPLY VOLTAGE (V) _______________________________________________________________________________________ 3 MAX9110/MAX9112 AC CHARACTERISTICS (continued) Typical Operating Characteristics (continued) (VCC = +3.3V, RL = 100Ω, CL = 5pF, VIH = +3V, VIL = GND, fIN = 20MHz, TA = +25°C, unless otherwise noted.) (Figures 2, 3) DIFFERENTIAL PULSE SKEW vs. SUPPLY VOLTAGE tPHLD 1.4 1.2 1.0 60 40 20 0 0.8 -15 10 35 60 3.1 TRANSITION TIME vs. SUPPLY VOLTAGE 3.2 3.3 3.4 3.5 580 560 TRANSITION TIME (ps) 600 tTLH tTHL 450 350 300 3.2 3.3 540 520 tTHL 500 3.4 3.5 480 460 MAX9110 toc06 1.40 1.30 1.25 1.20 1.15 1.10 1.05 OUTPUT LOW 1.00 -40 -15 10 35 60 3.0 85 3.1 3.2 3.3 DIFFERENTIAL OUTPUT VOLTAGE vs. LOAD RESISTANCE DIFFERENTIAL OUTPUT VOLTAGE vs. SUPPLY VOLTAGE 375 350 325 300 275 450 DIFFERENTIAL OUTPUT VOLTAGE (mV) MAX9110 toc10 400 425 VCC = +3.3V 400 VCC = +3V 375 350 VCC = +3.6V 325 300 275 250 250 3.0 3.1 3.2 3.3 3.4 SUPPLY VOLTAGE (V) 3.5 3.6 3.4 SUPPLY VOLTAGE (V) TEMPERATURE (°C) 425 85 OUTPUT HIGH 1.35 420 450 60 1.45 440 3.6 35 OUTPUT VOLTAGE vs. SUPPLY VOLTAGE tTLH SUPPLY VOLTAGE (V) DIFFERENTIAL OUTPUT VOLTAGE (mV) 10 1.50 400 3.1 -15 TEMPERATURE (°C) TRANSITION TIME vs. TEMPERATURE 400 4 -40 MAX9110 toc08 650 3.0 20 3.6 600 MAX9110 toc07 700 500 40 SUPPLY VOLTAGE (V) TEMPERATURE (°C) 550 60 0 3.0 85 OUTPUT VOLTAGE (V) -40 80 MAX9110 toc09 1.6 80 100 MAX9110 toc11 tPLHD MAX9110 toc05 DIFFERENTIAL PULSE SKEW (ps) 1.8 PROPAGATION DELAY (ns) 100 MAX9110 toc04 2.0 DIFFERENTIAL PULSE SKEW vs. TEMPERATURE DIFFERENTIAL PULSE SKEW (ps) DIFFERENTIAL PROPAGATION DELAY vs. TEMPERATURE TRANSITION TIME (ps) MAX9110/MAX9112 Single/Dual LVDS Line Drivers with Ultra-Low Pulse Skew in SOT23 75.0 87.5 100.0 112.5 125.0 137.5 150.0 LOAD RESISTANCE (Ω) _______________________________________________________________________________________ 3.5 3.6 Single/Dual LVDS Line Drivers with Ultra-Low Pulse Skew in SOT23 OUTPUT LOW VOLTAGE vs. LOAD RESISTANCE OUTPUT HIGH VOLTAGE vs. LOAD RESISTANCE 1.09 1.42 1.41 VCC = +3V 1.40 1.39 MAX9110 toc13 VCC = +3.6V OUTPUT LOW VOLTAGE (V) OUTPUT HIGH VOLTAGE (V) 1.44 1.43 1.10 MAX9110 toc12 1.45 VCC = +3.3V 1.38 1.08 VCC = +3.6V 1.07 1.06 1.05 VCC = +3V 1.04 VCC = +3.3V 1.03 1.37 1.02 1.36 1.01 1.00 1.35 75.0 87.5 100.0 112.5 125.0 137.5 75.0 150.0 87.5 100.0 112.5 125.0 137.5 150.0 LOAD RESISTANCE (Ω) LOAD RESISTANCE (Ω) Pin Description PIN MAX9110 NAME MAX9112 FUNCTION SOT23 SO SOT23 SO 4 1 4 1 VCC 1 2 — — DIN — — 1, 3 2, 3 DIN1, DIN2 3, 5, 6 3, 5, 6 — — N.C. No Connection. Not internally connected. 2 4 2 4 GND Ground 7 7 — — DO+ — — 6, 7 6, 7 DO2+, DO1+ 8 8 — — DO- — — 5, 8 5, 8 DO2-, DO1- Positive Supply Transmitter Input Noninverting Transmitter Output Inverting Transmitter Output Detailed Description The MAX9110/MAX9112 single/dual LVDS transmitters are intended for high-speed, point-to-point, low-power applications. These devices accept CMOS/LVTTL inputs with data rates exceeding 500Mbps. The MAX9110/MAX9112 reduce power consumption and EMI by translating these signals to a differential voltage in the 250mV to 450mV range across a 100Ω load while drawing only 9.4mA of supply current for the dualchannel MAX9112. A current-steering approach induces less ground bounce and no shoot-through current, enhancing noise margin and system speed performance. The output _______________________________________________________________________________________ 5 MAX9110/MAX9112 Typical Operating Characteristics (continued) (VCC = +3.3V, RL = 100Ω, CL = 5pF, VIH = +3V, VIL = GND, fIN = 20MHz, TA = +25°C, unless otherwise noted.) (Figures 2, 3) CL DO_+ DO_ + RL/2 DIN_ S VCC VOS GND VOD DIN_ GENERATOR VO MAX9110/MAX9112 Single/Dual LVDS Line Drivers with Ultra-Low Pulse Skew in SOT23 RL/2 RL DO_ - 50Ω CL DO_- Figure 1. LVDS Transmitter VOD and VOS Test Circuit Figure 2. Transmitter Propagation Delay and Transition Time Test Circuit 3V DIN_ 1.5V 1.5V tPLHD tPHLD 0 DO_ - VOH 0V DIFFERENTIAL 0 DO_+ VOL 80% 0 VDIFF 80% VDIFF = VDO_+ - VDO_- 0 20% 20% tTLH tTHL Figure 3. Transmitter Propagation Delay and Transition Time Waveforms stage presents a symmetrical, high-impedance output, reducing differential reflection and timing distortion. The driver outputs are short circuit current limited and enter a high-impedance state when the device is not powered. LVDS Operation The LVDS interface standard is a signaling method intended for point-to-point communication over a controlled impedance medium as defined by the EIA/TIA644 LVDS standard. The LVDS standard uses a lower voltage swing than other common communication standards, achieving higher data rates with reduced power consumption while reducing EMI emissions and system susceptibility to noise. LVDS transmitters such as the MAX9110/MAX9112 convert CMOS/LVTTL signals to low-voltage differential signals at rates in excess of 500Mbps. The MAX9110/ MAX9112 current-steering architecture requires a resistive load to terminate the signal and complete the trans6 mission loop. Because the device switches the direction of current flow and not voltage levels, the actual output voltage swing is determined by the value of the termination resistor at the input of an LVDS receiver. Logic states are determined by the direction of current flow through the termination resistor. With a typical 3.5mA output current, the MAX9110/MAX9112 produce an output voltage of 350mV when driving a 100Ω load. The steady-state-voltage peak-to-peak swing is twice the differential voltage, or 700mV (typ). Applications Information Supply Bypassing Bypass VCC with high-frequency surface-mount ceramic 0.1µF and 0.001µF capacitors in parallel, as close to the device as possible, with the smaller valued capacitor the closest. For additional supply bypassing, place a 10µF tantalum or ceramic capacitor at the point where power enters the circuit board. _______________________________________________________________________________________ Single/Dual LVDS Line Drivers with Ultra-Low Pulse Skew in SOT23 Board Layout For LVDS applications, a four-layer PC board that provides separate power, ground, LVDS signals, and input signals is recommended. Isolate the input and LVDS signals from each other to prevent coupling. Separate the input and LVDS signal planes with the power and ground planes for best results. Maintain the distance between the differential traces to avoid discontinuities in impedance. Avoid 90° turns and minimize the number of vias to further prevent impedance discontinuities. Typical Operating Circuit +3.3V +3.3V Cables and Connectors Transmission media should have a differential characteristic impedance of about 100Ω. Use cables and connectors that have matched impedance to minimize impedance discontinuities. Avoid the use of unbalanced cables, such as ribbon or simple coaxial cable. Balanced cables, such as twisted pair, offer superior signal quality and tend to generate less EMI due to canceling effects. Balanced cables tend to pick up noise as common mode, which is rejected by the LVDS receiver. 0.001µF DIN_ 0.001µF 0.1µF RT = 100Ω DRIVER RECEIVER 0.1µF OUT_ LVDS MAX9110 MAX9112 MAX9111 MAX9113 Termination Termination resistors should match the differential characteristic impedance of the transmission line. Because the MAX9110/MAX9112 are current-steering devices, an output voltage will not be generated without a termination resistor. Output voltage levels are dependent upon the termination resistor value. Resistance values may range between 75Ω and 150Ω. Minimize the distance between the termination resistor and receiver inputs. Use a single 1% to 2% surfacemount resistor across the receiver inputs. Chip Information MAX9110 TRANSISTOR COUNT: 765 MAX9112 TRANSISTOR COUNT: 765 PROCESS: CMOS _______________________________________________________________________________________ 7 MAX9110/MAX9112 Differential Traces Output trace characteristics affect the performance of the MAX9110/MAX9112. Use controlled impedance traces to match trace impedance to both transmission medium impedance and termination resistor. Eliminate reflections and ensure that noise couples as common mode by running the differential traces close together. Reduce skew by matching the electrical length of the traces. Excessive skew can result in a degradation of magnetic field cancellation. Single/Dual LVDS Line Drivers with Ultra-Low Pulse Skew in SOT23 SOICN.EPS SOT23, 8L.EPS MAX9110/MAX9112 Package Information Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.