Compaq PC-CARD manual Specifications, Digital input/output, Power consumption, Miscellaneous

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

+5 Volts DC	Available at I/O connector (+5V Power)
	Protected by resettable fuse:
	ƒ	Hold current:	350 mA
	ƒ	Trip current:	700 mA
	ƒ	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

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