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Max Iout of HMC914 ?

Question asked by taehankim on Aug 2, 2017
Latest reply on Dec 19, 2017 by taehankim

Hello,

 

Can I get the output drive capability information of HMC914 ?

I am struggling with the circuit as attached since HMC914's are dying

after short time of operation. As can be seen from the attached schematic,

HMC914 is driving CML output to CML receiver. The receiver device has

50 ohm pull-up resistor to VCC3V3 power. These output and input pins

are directly connected. As a result, the output transistor of HMC914 will

experience 25ohm pull-up to the 3.3V power. If HMC914 tries to swing

0.5V, the output transistor should sink 20mA (i=V/R=0.5/25=0.02).

Is 20mA allowed current output for HMC914 ?

I cannot find any information about the rated current sink from the datasheet.

 

Any advice will be appreciated.

Thanks in advance.

Tae-Han

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