Specifications

Digi m10 Hardware Reference v 1.20
Digi International, Inc. © 2009
Page 21 of 36
3.2.2 Digital Input / Output Specifications
The output pins can source / sink up to 10mA. For higher currents, the outputs must be buffered.
Table 9: Digital I/O Electrical Specifications
Parameter Min (V) Max (V) Maximum Recommended Load
V
Input Low
0 0.8 Not applicable (NA)
V
Input High
2.0 3.3 NA
V
Output Low
0 0.4 2 mA
V
Output High
2.4 3.3 2 mA
3.2.3 Lifespan
3.2.3.1 Design
Each major component has a product roadmap of pin-compatible replacements for a
minimum of 3 years.
3.2.3.2 Failure Rate
The Digi m10 has a Mean Time between Failure (MTBF) of at least 43,800 hours with a
transmitter duty cycle of 0.05% and receiver duty cycle of 99.95% over the entire period.
Refer to Section 2.2.9 Reliability of the ORBCOMM Subscriber Communicator (SC)
Standards and Specifications.
3.3 Mechanical
This section describes the mechanical specification of the Digi m10.
3.3.1 Module Size
The Digi m10 (see Figure 9 has a maximum footprint of 2.96" x 1.81" x 0.52" (75.30 mm x 46.20
mm x 13.35 mm) with all the RFI covers in place.