© 2006 CTS Corporation. All rights reserved. Information subject to change.
CTS Electronic Components Page 1 October 07
www.ctscorp.com
LVPECL Terminators
LVPECL Terminators
Technical Data Sheet
RoHS Compliant Parts Available
Packaging Information
Suffix TR7 TR13
Tape Width 24 mm 24mm
Carrier Pitch 8 mm 8 mm
Reel Diameter 7 inch 13 inch
Parts/Reel 1,000 4,000
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
Typical Application
LVPECL
RECEVERS
LVPECL
DRIVERS
CTS
RT2250/RT2251
V
CC
V
EE
R1R2
Features
• 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 lead-
free
rocesses
Ordering 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 RT2250B7
RT1251B6 250 62.5 8 1.27 RT2251B6
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
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.
Electrical Specifications
Resistor Tolerance:
± 1.0%
TCR
± 200 ppm/°C
Operating Temperature Range
-55°C to +125°C
B6-1.27mm Pitch B7-1.00mm Pitch
96mW
96mW
60mW
66mW
143mW 91mW
Maximum Resistor Power:
RT1250 R1
RT1250 R2
RT1251 R1
RT1251 R2
164mW 105mW
Maximum Package Power:
1.0 Watt at 70°C
Process Requirements:
Maximum Re-flow Temperature Per IPC/JEDEC J-STD-020C
V
EE
R1
R2
Zo
Zo = 50 Ohms Thevenin Vtt = 1.3Volts
V
CC
= 3.3 Volts R1 = 127 Ohms
V
EE
= 0 Volts R2 = 82.5 Ohms
Zo = 50 Ohms Thevenin Vtt = 0.5 Volts
V
CC
= 2.5 Volts R1 = 250 Ohms
V
EE
= 0 Volts R2 = 62.5 Ohms
LVPECL Thevenin Termination
R1
R2
Style G
DEFABC GH
1
2
3
