Chapter 4
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in
italic text
are guaranteed by design.
Digital input/output
Table 1. Digital I/O specifications
Digital type
82C55
Configuration
4 banks of 8, 4 banks of 4, programmable by bank as input or output
Number of channels
48 I/O
Output high
3.0 volts min @ -2.5 mA
Output low
0.4 volts max @ 2.5 mA
Input high
2.0 volts min, +5.5 volts absolute max
Input low
0.8 volts max, -0.5 volts absolute min
Power-up / reset state
Input mode (high impedance)
Power consumption
Table 2. Power consumption specifications
+5V operating
37 mA typical, 55 mA max
Miscellaneous
Table 3. Miscellaneous specifications
Available at I/O connector (+5V Power)
+5 Volts DC
Protected by resettable fuse:
Hold current:
350 mA
Trip current:
700 mA
Trip and recovery time:
100 mS
Environmental
Table 4. Environmental specifications
Operating temperature range
0 to 70 °C
Storage temperature range
-40 to 100 °C
Humidity
0 to 95% non-condensing
17
Summary of Contents for PC-CARD
Page 1: ......
