Data Sheet

QPRO Technical Data Sheet
Document 1137-0901, REV K 23
To increase current drive, insert a buffer with high input impedence between the DIGX_IF configured as an
output and the load as shown below. A typical buffer might be a 74 series 126 with a part number of
74LVC1G126DBV. This will increase the drive to > +/- 20 milliamps.
Figure 4-6, Buffer for DIO as Output
4.1.2.3 Switched Digital Relay
There are four available on Pins 18/19 and 20/21 :
• Two pins route the supplied input voltage on Pins 18 and 19.
• Two pins provide switch closure to ground Pins 20 and 21.
Two of the inputs can source (pulls to input voltage) and two sink (pulls to ground) at ambient temperatures
and are de-rated as seen in the chart below.
.
DIGX_IF
Buffered
Output
BUFFER
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