Micrel, Inc.

SY898530U

November 2011

10

M9999-111011-C

Output Interface Applications

Figure 1. Parallel Termination-Thevenin Equivalent

Notes:

1. For +2.5V systems: R1 = 250Ω, R2 = 82.5Ω.

Figure 2. Three-Resistor “Y-Termination”

Notes:

1. Power-saving alternatives to Thevenin termination.

2. Place termination resistors as close to destination inputs as possible.

Figure 3. Terminating Unused I/O

Notes:

1. Unused output (/Q) must be terminated to balance the output.

2. For 2.5V systems: R1 = 250Ω, R2 = 62.5Ω, R3 = 1.25kΩ, R4 = 1.2kΩ.