Specifications - IBM RT Series Hardware Reference Manual

Specifications
The following figures list characteristics of the output driver.
Sink current 24 rnA
Max
Source current -2.6 rnA Max
High-level output voltage 2.4 Vdc Min
Low-level output voltage 0.5 Vdc Max
Parallel Data and Processor IRQ
Sink current 16 rnA Max
Source current 0.55 rnA Max
High level output voltage 5Vdc Minus pull-up
Low level output voltage 0.4 Vdc Max
Parallel Control
Sink current 24 rnA Max
Source current
-15 rnA
Max
High level output voltage 2.0 Vdc Min
Low level output voltage
0.5 Vdc Max
Parallel Processor Interface (except IRQ)
The following are the specifications for the serial interface.
Function Condition
On Spacing condition (binary 0, positive voltage).
Off Marking condition (binary 1, negative voltage).
Voltage Function
above +15 Vdc Invalid
+3 Vdc to +15 Vdc On
-3 Vdc to +3 Vdc Invalid
-3 Vdc to -15 Vdc Off
Below -15 Vdc Invalid
Serial Port Functions
24 Serial/Parallel Adapter