hardware design v2.00
Table Of Contents
- Contents
- Version History
- 1 Introduction
- 2 SIM908 Overview
- 3 Package Information
- 4 GSM Application Interface
- 4.1 Power Supply
- 4.2 Power on/down Scenarios
- 4.3 Power Saving Mode
- 4.4 Charging Interface
- 4.5 RTC Backup
- 4.6 Serial Interfaces
- 4.7 Audio Interfaces
- 4.8 SIM Card Interface
- 4.9 LCD Display/SPI Interface
- 4.10 Keypad Interface
- 4.11 ADC
- 4.12 RI Behaviors
- 4.13 Network Status Indication
- 4.14 General Purpose Input/Output (GPIO)
- 4.15 PWM
- 4.16 I2C Bus
- 4.17 GSM Antenna Interface
- 5 GPS Application Interface
- 6 Electrical, Reliability and Radio Characteristics
- 6.1 Absolute Maximum Ratings
- 6.2 Recommended Operating Conditions
- 6.3 Digital Interface Characteristics
- 6.4 SIM Card Interface Characteristics
- 6.5 VDD_EXT Characteristics
- 6.6 SIM_VDD Characteristics
- 6.7 VRTC Characteristics
- 6.8 Current Consumption (VBAT = 3.8V, GPS engine is powered down)
- 6.9 Electro-Static Discharge
- 6.10 Radio Characteristics
- 6.11 Module label information
- Appendix
Smart Machine Smart Decision
3.4 Mechanical Dimensions of the RF Connector
The RF connector in the module side is an ultra small surface mount coaxial connectors (Part Number:
U.FL-R-SMT, vended by HRS). It has high performance with wide frequency range, surface mountable and
reflows solder able. Following figure are the related parameters. Certainly user can visit
http://www.hirose-connectors.com/
for more information.
To get good RF performance in user’s design, SIMCom suggests user to use the matching RF adapter cable
which is also supplied by HRS (Part Number: U.FL-LP（V）-040), the following figure is the dimensions of U.FL
series RF adapter cable. User can contact SIMCom for more information.
Figure 5: U.FL-R-SMT (Unit:mm)
Figure 6: U.FL series RF adapter cable (Unit:mm)
SIM908_Hardware Design_V2.00 2012.05.07
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