Ublox SARA-G450 Series User Manual

UBX-18046432 - R08 C1-Public www.u-blox.com
SARA-G450
Quad-band GSM/GPRS module
System integration manual
Abstract
This document describes the features and the system integration of the SARA-G450 quad-band
GSM/GPRS cellular modules. These modules are a complete and cost efficient solution offering voice
and/or data communication in the compact SARA form factor.

Ublox SARA-G450 Series Specifications

General

Product Category	GSM/GPRS Modules
Technology	GSM/GPRS
Data Transfer	GPRS Class 10
Operating Temperature	-40°C to +85°C
Frequency Bands	850/900/1800/1900 MHz
Data Rate	Up to 85.6 kbps
Interfaces	UART, GPIO, I2C, SPI
Certifications	CE, FCC, GCF, IC

Summary

SARA-G450 System Integration Manual Overview

System Description Overview and Architecture

Module Pin-out Definition

Details the pin-out of the SARA-G450 modules, grouped by function, including pin names, numbers, I/O, and descriptions.

Supply Interfaces: VCC, V_BCKP, and V_INT

Covers module power supply (VCC), RTC supply (V_BCKP), and digital interface supply (V_INT) with detailed requirements.

System Function Interfaces: Power Control and Voltage Selection

Antenna Interface Requirements and Design

Specifies requirements for the ANT RF interface and antenna detection (ANT_DET) with design guidelines.

SIM Interface and Card Detection

Serial Interfaces: UART, AUX UART, FT UART, and DDC (I2C)

Details the primary UART, auxiliary UART, FT UART for FW upgrade, and DDC (I2C) interface functionalities.

Audio Interfaces for Microphone and Speaker

System Features: Network, Antenna, Jamming, and Protocols

Firmware Upgrade, Last Gasp, and Power Saving

Design-in Guidelines for Optimal Integration

Supply Interfaces Design: VCC, V_BCKP, V_INT

Provides detailed guidelines for designing VCC, V_BCKP, and V_INT supply circuits, including component selection.

System Function Interfaces Design: Power and Voltage Control

Offers guidelines for designing PWR_ON, PWR_OFF, and VSEL circuits for proper module operation.

Antenna Interface Design: RF Connection and Detection

Details guidelines for antenna RF interface design, including selection, layout, and detection circuit implementation.

SIM Interface Connection and Layout Design

Covers guidelines for connecting SIM cards, chips, and dual SIM configurations with attention to layout.

Serial Interfaces Design: UART, AUX UART, FT UART, DDC (I2C)

Provides circuit and layout design guidelines for various serial interfaces including UART, AUX UART, FT UART, and DDC (I2C).

Audio Interface Design for Microphone and Speaker

GPIO Circuit Design and Layout Guidelines

Module Placement and Footprint Considerations

Design-in Checklist: Schematic, Layout, and Antenna

A checklist covering critical schematic, layout, and antenna design points for successful integration.

Handling and Soldering Procedures

Electro-Static Discharge (ESD) Sensitive Device Handling

Precautions and safety measures for handling ESD sensitive SARA-G450 modules.

Soldering Guidelines: Paste, Reflow, and Cleaning

Details on soldering paste, reflow soldering profiles, optical inspection, and cleaning procedures.

Soldering Process Recommendations: Repeated, Wave, Hand, Rework

Product Testing and OEM Manufacturer Focus

Functional Tests for RF Operation

Appendix: SARA Module Migration and Schematics

Pin-out Comparison for SARA Module Series

Example Schematic for SARA Module Integration