Datasheet

SN75468
,
SN75469
SLRS023E DECEMBER 1976REVISED JANUARY 2015
www.ti.com
11 Power Supply Recommendations
This part does not need a power supply; however, the COM pin is typically tied to the system power supply.
When this is the case, it is very important to make sure that the output voltage does not heavily exceed the COM
pin voltage. This will heavily forward bias the fly-back diodes and cause a large current to flow into COM,
potentially damaging the on-chip metal or over-heating the part.
12 Layout
12.1 Layout Guidelines
Thin traces can be used on the input due to the low current logic that is typically used to drive SN75468. Care
must be taken to separate the input channels as much as possible, as to eliminate cross-talk. Thick traces are
recommended for the output, in order to drive whatever high currents that may be needed. Wire thickness can be
determined by the trace material's current density and desired drive current.
Since all of the channels currents return to a common emitter, it is best to size that trace width to be very wide.
Some applications require up to 2.5 A.
12.2 Layout Example
Figure 22. Package Layout
14 Submit Documentation Feedback Copyright © 1976–2015, Texas Instruments Incorporated
Product Folder Links: SN75468 SN75469