Features: · Minimal ground bounce, crosstalk· Stable 1% absolute tolerance elements· 16 terminating lines per QSOP package· Saves board space and reduces assembly costApplication· HSTL termination· Thevenin terminatio· ECL, TTL terminationDescriptionHigh speed logic devices like HSTL (High Speed T...
PAC004DTFQR: Features: · Minimal ground bounce, crosstalk· Stable 1% absolute tolerance elements· 16 terminating lines per QSOP package· Saves board space and reduces assembly costApplication· HSTL termination· ...
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Features: ·Minimal Ground Bounce, Cross-Talk·Stable 1% Absolute Tolerance elements·6 terminating l...
US $.36 - .4 / Piece
Wirewound Resistors - Through Hole 1watt 50ohms 1% 100ppm
High speed logic devices like HSTL (High Speed Transceiver Logic)PAC004DTFQR demand unique, high speed bus terminations. The dual Th¨|venin termination networ rovides 16 terminating channels per package, and optimizes signal integrity by reducing reflections and ringing. The terminations of PAC004DTFQR are available in a range of standard values and are ideal for use in HSTL busses.
As seen in the schematic, R1 is typically tied to VCCandserves as a pull-up resistor, while R2 functions as a pull- down resistor and is tied to ground (or the most negative supply voltage). In addition, the equivalent Th¨|veni resistance (R1 in parallel with R2) should match the impedance of the trace. Ground-bounce and crosstalk of PAC004DTFQR are virtually eliminated using a proprietary lead-frame which includes four direct ground connections to the die substrate, as well as four double-bonded connections to VCC, for a total of 8 commons. In addition, the resistors are trimmed to a tight absolute tolerance of 1% which provides tight impedance-matching and results in greatly reduced reflections. This unique proprietary design of PAC004DTFQR provides optimal signal integrity.