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[FAQ] SN75LVPE5421: SN75LVPE5412 RSVD Pins 2 and 12 Tied to GND or Cap to GND?

Nasser Mohammadi
Guru* 93670 points
Part Number: SN75LVPE5421
Other Parts Discussed in Thread: SN75LVPE5412, DS160PR412

Tool/software:

First version of the data sheet required Cap to GND on RSVD pins 2 & 12. Then later revision called for zero-ohm Resistor to GND.

Whether we use 0-ohm resistor or Cap to GND this does not make a difference. SN75LVPE5412 schematic based on earlier version of the data sheet can continue using 0.1uF/0201 Cap to GND and this should not cause a problem.

Why was this done?

SN75LVPE5412 is pin compatible with DS160PR412. On DS160PR412 pins 2 and 12 are regulator pins and we required Cap to GND. In order for SN75LVPPE5412 to be pin compatible with DS160PR412, we recommended Cap to GND. In reality SN75LVPE5412 pins 2 & 12 can have either Cap to GND or tie to GND directly. If a customer wants to be pin compatible with DS160PR412 then we can use Cap to GND.

Regards, Nasser