User's Manual
Table Of Contents
- SB555 Hardware Integration
- Contact Information
- Table of Contents
- 1: About this Guide
- 2: Mechanical Integration
- 3: Electrical Integration
- 4: Serial Interfaces
- 5: Voice Interface
- 6: Control Signals
- 7: RF Integration
- Appendix A: Host Connector Pinouts
- Appendix B: Sample Integration
- Appendix C: Electrostatic Discharge
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3: Electrical Integration
• Introduction
• Specifications
• General
requirements
• Power supply
• Electrostatic
discharge
Introduction
This chapter covers the integration requirements
and issues related to the general electrical
connection of the SB555 modem, and the power
supply in particular. RF issues are covered in
Chapter 7:RF Integration on page 79.
The SB555 embedded modem presents all
electrical interfaces on the single 40-pin host
connector. This chapter covers:
• The connector and the general electrical
characteristics of the modem
• Power supply considerations
• Electrostatic Discharge (ESD) protection
The elements of integrating each of the modem
interfaces (serial, voice, and control signals) are
covered in subsequent chapters.
Modem specifications
The SB555 embedded modem provides a single
40-pin (2x20) header. The connector pinouts are
specified in Appendix A:Host Connector Pinouts
on page 89.
All signals are 3.0 V, HCMOS logic compatible.