Electrical characteristics – Impulse 4030 User Manual
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© Sealevel Systems, Inc.
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PIO-48 User Manual
Electrical Characteristics
The PIO-48 uses 74LS245 octal bi-directional transceivers to provide TTL
input/output capabilities. Each bit is pulled to +5V through a 10K ohm pull-up
resistor to insure each bit is at a known state when not driven.
Specifications
Inputs
Logic High: Min 2VDC
Logic Low:
Max 0.8VDC
Outputs
Logic High: Min 2VDC @ 15 mA
Logic
Low
: Max 0.5VDC @ 24 mA
Temperature Range
Operating:
0°C – 70°C
Storage:
-50°C – 105°C
Power Requirements
+5VDC @ 200mA
+12VDC @ 25mA
Manufacturing
All Sealevel Systems Printed Circuit boards are built to UL 94V0 rating and are
100% electrically tested. These printed circuit boards are solder mask over bare
copper or solder mask over tin nickel.