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©2016 Integrated Device Technology, Inc

Revision B November 16, 2016

831724 Datasheet

3. Calculations and Equations.

The purpose of this section is to calculate power dissipation on the IC per HCSL output pair.

HCSL output driver circuit and termination are shown in Figure 5.

Figure 5. HCSL Driver Circuit and Termination

HCSL is a current steering output which sources a maximum of 17mA of current per output. To calculate worst case on-chip power dissipation,

use the following equations which assume a 50

 load to ground.

The highest power dissipation occurs at VDD_MAX.

Power

= (VDD_MAX – VOUT) * IOUT,

since VOUT = IOUT * RL

Power

= (VDD_MAX – IOUT * RL) * IOUT

Power

= (3.6V – 17mA * 50

) * 17mA

Total Power Dissipation per output pair = 46.8mW

VDD

VOUT

RL

50



IC

IOUT = 17mA

RREF =

475

 ± 1%