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HIGH PERFORMANCE GTL/ECL Viking
TERMINATION NETWORK—RA2
Product Description
The RA-2 is a high performance bus termination network ideal for high speed bus termination
applications. The RA-2 meets all intel® Pentium termination specifications as well as the termination
requirements of other high-speed microprocessors such as the DEC Alpha, Motorola PowerPC, SGI
MIPS, and Sun SPARC. A 300-line termination solution can be achieved with just 14 RA-2 networks.
A terminating resistor is used to eliminate unwanted transmission line effects such as ringing,
overshoots and undershoots on printed circuit board traces, and/or provide DC pull-up/pull-down.
Proper resistor termination requires a resistor whose value closely matches the characteristic
impedance of the transmission line. Thin film networks offer significant advantages over conventional
thick film processes in terms of tighter absolute and ratio tolerances, greater stability, lower noise,
and Temperature Coefficient of Resistance (TCR). Furthermore, they offer superior high frequency
performance with minimal parasitic inductance and capacitance. Integrated thin film networks also
afford the benefits of board space savings, reduced assembly costs, and increased reliability with
fewer components.
Features Schematic Power Derating
-22-Line high-speed termination
-Stable thin-film-on-silicon technology
-Miniaturized package as QSOP
Applications
-Servers, Desktops & mobile
-Computing Devices
-High speed microprocessor system termination
-GTL / ECL Termination
Specifications1 How to Order
Resistance Values
Resistance (Ω) 33 47 50 56 68 75 90
Correspondent Value Code 330 470 500 560 680 750 900
Standard Packages Options
Viking is capable of supply following options based on customer’s
demand
Packages → TSSOP 24 Pin
Resistance Variation → 10~10KΩ
Packing → Wafer form
Description Values
Absolute Tolerance (R) ±2% ±5%
TCR ±100ppm/℃
TTCR (Typical) ±25ppm/℃
Power Rating / Resistor @Ta=70℃ 0.100 watt
Package Power Rating @ Ta=70℃ 1.00watt / QSOP
Maximum Operating Voltage 50V
Operation Temperature -55℃ ~ 125℃
Storage Temperature -65℃ ~ 150℃
Note 1: A Non-Recurring Engineering (NRE) charge and a minimum
order/lot size may apply for all fully customized requirements.
R
pin # 24
pin # 1
1.00
25 1251007550 150
WATTS
AMBIENT TEMPERATURE( )
℃
QSOP 24
RA2 330 JQS 24 R
Packing
R=Re e l
T=Tube
Pin Count
QSOP=24 P in
Package Type
QS=QSOP
Standard Grade Tolerance
J=±5%, ±100ppm/0C
G=±2%, ±100ppm/0C
Va lu e Co d e
(Re fer to R Value Ta ble )
Product Code
RA2=Busse d Te rminator
Pin No. Ea.tube
QSOP 24 50