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| SK2111 1:10 Differential LVDS Clock Driver TEST AND MEASUREMENT PRODUCTS Description SK2111 is a 1 to 10 data/clock distributor utilizing LVDS (Low Voltage Differential Signaling) technology for high speed operation. Data paths are fully differential from input-to-output for low noise generation and low pulse width distortion. The design allows connection of 1 input to all 10 outputs. LVDS I/O enable high speed data transmission for point-to-point interconnects. This device can be used as a high speed differential 1 to 10 signal distribution / fanout replacing multi-drop bus applications for higher speed links with improved signal quality. It can also be used for clock distribution up to 800 MHz. The SK2111 accepts LVDS signal levels, LVPECL levels directly or PECL with attenuation network resistors. The inputs of SK2111 have an on-chip 100 termination resistors to minimize the component count. The OE input is synchronous so that the outputs will only be enabled/disabled when they are already in the low state. This feature prevents generating any runt clocks. The EDQUAD LQFP package has an exposed heatslug which is connected to VEE substrate. Features Supply Voltage Range: +3.0V to +3.6V Part-to-part skew 75 ps (Max.) Output channel-to-channel skew is 60 ps (Max.) 800 MHz minimum toggle frequency Differential output voltage (DVOUT) is 350 mV (typical) with 100 termination load LVDS receiver inputs accept LVPECL signals On-chip 100 input termination resistor Fast propagation delay of 500 ps (typical) Receiver input threshold <100 mV VREF for LVDS single-ended input applications ESD Protection of >4000V Industrial Temperature Range: -40oC to +85oC Available in Thermally Enhanced EDQUAD 32 Pin LQFP Package Conforms to ANSI/TIA/EIA-644 LVDS standard Pin Description Q3* Q4* Q5* Q6* 17 16 15 14 13 Q3 Q4 Q5 Functional Block Diagram VCC 25 26 27 28 29 30 31 32 24 23 22 21 20 19 Q6 18 VCC Q7 Q7* Q8 Q8* Q9 Q9* VCC 10 CLK1 Q2* Q2 CLK1* 100 Q0:Q9 Q0*:Q9* LEN Q VREF 1.2V Q1* Q1 Q0* Q0 VCC SK2111 12 11 10 9 OE D 1 2 3 4 5 6 7 8 NC CLK1 CLK1* VCC NC OE Pin Names Pi n CLK1, CLK1* Q0, Q9, Q0*, Q9* V REF OE Function Differential LVDS Input Pair Differential LVDS Outputs LVDS Reference Voltage 1.2V Output Enable Input LV TTL / LVCMOS OE 0 1 Q0-Q9 LOW Qn VREF Q0*-Q9* HIGH Qn* Truth Table VEE Revision 3 / April 24, 2003 1 www.semtech.com SK2111 TEST AND MEASUREMENT PRODUCTS Package Information Thermally Enhanced EDQUAD 32 Pin LQFP Package D D1 N EXPOSED HEATSINK 4.32 .12 DIAMETER HEATSINK INSTRUSION .0127 MAX. 1 -A- -B- E1 E NOTES: 1. All dimensions are in millimeters (mm). 2. Dimensions shown are nominal with tolerance as indicated. 3. L / F: EFTEC 64T copper, or equivalent, 0.127 mm (.005) thick. 4. Foot length L is measured at gage plane, at 0.25 above the seating plane. -D- DIMS. 12 Typ. TOL. 0.2 Millimeters 1.4 Min./1.6 Max. .05 Min./.15 Max A A1 A2 A A2 D D1 E E1 .05 .20 .10 .20 .10 +.15/-.10 BASIC .05 1.40 9.00 7.00 9.00 7.00 .60 .80 .35 0- 7 A1 12 Typ. e 0.20 RAD. TYP . L e 0.20 RAD. TYP . b ddd MAX. MAX. .20 .10 6 4 A .25 STANDOFF A1 SEATING PLANE ccc -C- Revision 3 / April 24, 2003 q L 0.17 MAX. b ddd M C A - B S D S LEAD COPLANARITY ccc C 2 www.semtech.com SK2111 TEST AND MEASUREMENT PRODUCTS Absolute Maximum Ratings* Sy mb ol V CC VI IIN P aram et er Pow er Su p p l y In p u t Vol tag e In p u t Cu rren t O u t p u t Cu rren t Con t i n u ou s Su rg e T h ermal R esi stan ce ( J u n cti on -to-amb i en t) at 400 L FPM, 4 l ay er b oard T h ermal R esi stan ce ( J u n cti on -to-amb i en t) at Sti l l A i r, 4 l ay er b oard Storag e Temp eratu re R an g e Val u e -0.3 to 4.6 -0.3 to V CC + 0.3 20 50 10 0 29.8 44 -40 to 125 Unit V V mA mA mA oC/W oC/W oC I OU T JA for EDQUA D LQFP JA for EDQUA D LQFP Tstg * Maximum Ratings are those beyond which damage to the device may occur. DC Characteristics SK2111 LVCMOS/LVTTL DC Electrical Characteristics (VCC = 3.0V to 3.6V, VEE = 0V) TA = -40o C Symbol VI H VI L VC L TA = 0o C Max Min 2.0 0.8 0.8 -1.5 -0.8 -1.5 TA = 25o C Max Min 2.0 0.8 -0.8 -1.5 TA = 85o C Max Min 2.0 0.8 -0.8 IC L = 18 mA Characteristics Input HIGH Voltage Input LOW Voltage Input Clamp Voltage Min 2.0 Typ Typ Typ Typ Max Conditions U n i ts V V V -1.5 -0.8 Revision 3 / April 24, 2003 3 www.semtech.com SK2111 TEST AND MEASUREMENT PRODUCTS DC Characteristics (continued) SK2111 LVDS Input/Output DC Electrical Characteristics (VCC = 3.0V to 3.6V, VEE = 0V) TA = - 40o C Symbol VIH VIL VO H VO L V PP DV O U T VR E F RI N TA = 0o C Min 0.9 0.65 1.25 0.95 0.1 0.25 1.1 80 0.37 1.2 100 TA = 25o C Max 2.6 2.4 1.8 1.5 1.0 0.47 1.3 120 TA = 85o C Max 2.6 2.4 1.8 1.5 1.0 Characteristics Input High Voltage Input Low Voltage Output High Voltage Output Low Voltage Peak-to-Peak Input Swing Peak-to-peak Voltage 1 LVDS Reference Voltage Input Impedance Min 0.9 0.65 1.25 0.95 0.1 0.25 1.1 80 Typ Max 2.6 2.4 1.8 1.5 1.0 Typ Min 0.9 0.65 1.25 0.95 0.1 0.25 1.1 80 Typ Min 0.9 0.65 1.25 0.95 0.1 0.25 1.1 80 Typ Max 2.6 2.4 1.8 1.5 1.0 U n i ts V V V V V V V 0.35 1.2 95 0.47 1.3 120 0.39 1.2 105 0.47 1.3 120 0.4 1.2 110 0.47 1.3 120 SK2111 Power Supply DC Electrical Characteristics (VCC = 3.0V to 3.6V, VEE = 0V) TA = - 40o C Symbol IC C TA = 0o C Max 230 TA = 25o C Max 230 TA = 85o C Max 230 Characteristics Total Supply Current4 Min 120 Typ 165 Min 120 Typ 175 Min 120 Typ 185 Min 120 Typ 190 Max 230 U n i ts mA Revision 3 / April 24, 2003 4 www.semtech.com SK2111 TEST AND MEASUREMENT PRODUCTS AC Characteristics SK2111 AC Electrical Characteristics (VCC = 3.0V to 3.6V, VEE = 0V) TA = -40o C Symbol FM A X tPLH t P HL t r, t f TC C S TA = 0o C Max Min 800 TA = 25o C Max Min 800 TA = 85o C Max Min 800 Characteristics Max Toggle Frequency 2 Propagation Delay CLK to Output Output Rise and Fall Time (20% to 80% ) Output Channel-to-Channel Skew Min 800 400 150 Typ Typ Typ Typ Max U n i ts MHz 485 570 320 60 390 155 480 570 330 60 410 160 495 580 340 60 430 165 515 600 360 60 ps ps ps NOTES: 1. DVOUT is obtained as follows: Voltages of Q and Q* outputs with respect to VEE are measured. The absolute difference between the high and the low is equal to DVOUT. 2. 250 mV minimum output peak-to-peak swing for Max toggle frequency. 3. For part ordering information, see HPP Part Ordering Information Data Sheet 4. RL = 100, 800 MHz, OE = High Revision 3 / April 24, 2003 5 www.semtech.com SK2111 TEST AND MEASUREMENT PRODUCTS AC Characteristics (continued) AC Timing Diagrams PIN Descriptions R1+ R150 50 CL Pulse Generator R D CL RL OUT+ OUT- Figure 1: LVDS Output Load Ordering Information O r d er i n g C o d e SK2111A XF SK2111A XFT Packag e ID 32-LQFP-EDQU A D 32-LQFP-EDQU A D Contact Information Semtech Corporation Test and Measurement Division 10021 Willow Creek Rd., San Diego, CA 92131 Phone: (858) 695-1808 FAX: (858) 695-2633 6 www.semtech.com Revision 3 / April 24, 2003 |
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