LVPECL Terminators Technical Data Sheet RoHS Compliant Parts Available Features Description These integrated termination networks provide high performance line termination designs for both 2.5V & 3.3V LVPECL busses. Specifically designed shielding inside the package combined with a ceramic substrate virtually eliminates cross talk between channels that is common in other termination networks and resistor arrays. The BGA packaging has been proven to reduce rework and improve reliability. Style G • • • • • • • 8 Bit Thevenin Termination Set Compliant for LVPECL Termination Excellent High Frequency Performance Slim BGA Package 1% Resistor Tolerance Low Channel to Channel Cross Talk RoHS Compliant Designs Available • Compatible with both lead and leadfree processes LVPECL Thevenin Termination R1 3 Zo R1 R2 2 Zo = 50 Ohms VC C = 3.3 Volts VEE = 0 Volts Thevenin Vtt = 1.3Volts R1 = 127 Ohms R2 = 82.5 Ohms Zo = 50 Ohms VC C = 2.5 Volts VEE = 0 Volts Thevenin Vtt = 0.5 Volts R1 = 250 Ohms R2 = 62.5 Ohms R2 1 A B C D E F G H Electrical Specifications Resistor Tolerance: TCR Operating Temperature Range Maximum Resistor Power: RT1250 RT1250 RT1251 RT1251 Maximum Package Power: Process Requirements: Maximum Re-flow Temperature R1 R2 R1 R2 ± 1.0% ± 200 ppm/°C -55°C to +125°C B6-1.27mm Pitch 96mW 96mW 143mW 164mW 1.0 Watt at 70°C VEE Typical Application LVPECL DRIVERS VEE VC C R2 R1 LVPECL RECEVERS B7-1.00mm Pitch 60mW 66mW 91mW 105mW Per IPC/JEDEC J-STD-020C CTS RT2250/RT2251 Ordering Information Packaging Information Standard Part No. R1 Ω R2 Ω Bits Pitch (mm) RoHS Part No. RT1250B6* 127 82.5 8 1.27 RT2250B6* RT1250B7 127 82.5 8 1.00 RT1251B6 250 62.5 8 1.27 Suffix TR7 TR13 Tape Width 24 mm 24mm Carrier Pitch 8 mm 8 mm RT2250B7 Reel Diameter 7 inch 13 inch RT2251B6 Parts/Reel 1,000 4,000 RT1251B7 250 62.5 8 1.00 RT2251B7 *Indicates available Top Probe-able part numbers. Refer to the following link for detailed Top Side Probe-able information: www.ctscorp.com/components/clearone/TopProveClearOne.pdf Part Number Coding 7 inch reel, Add TR7 to part number, example RT2250B7TR7 13 inch reel, Add TR13 to part number, example RT2250B7TR13 (Bulk packaging is not available) Direction of Feed CTS Electronic Components www.ctscorp.com © 2006 CTS Corporation. All rights reserved. Information subject to change. Page 1 LVPECL Terminators October 07 Recommended Land Pattern BGA Routing Scheme Blind vias to VEE reference plane layer recommended on every other row as shown. Outline of Substrate Signal Lines 9 mil trace width or similar to achieve controlled 50 Ohm transmission line impedance Zo. Solder Mask Dia = Pad Diameter +.15mm (.006 inch) PCB Pad Diameter Blind vias to V CC reference plane layer recommended on every other row as shown. 1.00mm Pitch (B7) = 0.51mm/.020 inch (minimum) 1.27mm pitch (B6) = 0.64mm/.025 inch (minimum) For .006" Thick Solder Paste Stencil, Aperture Opening Should be Equal to the PCB Pad Diameter. Refer to www.ctscorp.com/components/clearone.asp for additional PCB design information Mechanical Diagram L W H RT_250B_ CTS YRWK P (Pitch) A1 Identifier K 1.00mm Pitch RT1250B7 RT2250B7 RT1251B7 RT2251B7 D L W H P D K mm 8.00±0.15 3.00±0.15 1.19±0.15 1.00±0.25 0.64±0.05 0.50±0.25 inch .315±.006 .118±.006 .047±.006 .039±.010 .025±.002 .020±.010 L W H P D K mm 10.16±0.15 3.81±0.15 1.32±0.15 1.27±0.25 0.76±0.05 0.64±0.25 inch .400±.006 .150±.006 .052±.006 .050±.010 .030±.002 .025±.010 1.27mm Pitch RT1250B6 RT2250B6 RT1251B6 RT2251B6 P (Pitch) Complete ClearONE Product, Processing, and Application Information can be found at the following link: http://www.ctscorp.com/components/clearone.asp CTS Electronic Components www.ctscorp.com © 2006 CTS Corporation. All rights reserved. Information subject to change. Page 2 LVPECL Terminators October 07