Specifications

Cinterion
®
ELS81-US Hardware Interface Description
Contents
107
 els81-us_hid_v01.004 2017-09-27
Confidential / Preliminary
Page 4 of 107
3.2.2.1 Restart ELS81-US via AT+CFUN Command ...................... 59
3.2.2.2 Restart ELS81-US Using EMERG_RST ............................. 60
3.2.3 Signal States after Startup .................................................................. 61
3.2.4 Turn off ELS81-US.............................................................................. 62
3.2.4.1 Switch off ELS81-US Using AT Command.......................... 62
3.2.5 Automatic Shutdown ........................................................................... 64
3.2.5.1 Thermal Shutdown .............................................................. 64
3.2.5.2 Undervoltage Shutdown...................................................... 65
3.2.5.3 Overvoltage Shutdown........................................................ 65
3.3 Power Saving................................................................................................... 66
3.3.1 Power Saving while Attached to WCDMA Networks .......................... 66
3.3.2 Power Saving while Attached to LTE Networks.................................. 67
3.3.3 Wake-up via RTS0.............................................................................. 68
3.4 Power Supply................................................................................................... 69
3.4.1 Power Supply Ratings......................................................................... 69
3.4.2 Measuring the Supply Voltage (VBATT+)........................................... 72
3.4.3 Monitoring Power Supply by AT Command ........................................ 72
3.5 Operating Temperatures.................................................................................. 73
3.6 Electrostatic Discharge .................................................................................... 74
3.6.1 ESD Protection for Antenna Interfaces ............................................... 74
3.7 Blocking against RF on Interface Lines ........................................................... 75
3.8 Reliability Characteristics................................................................................. 77
4 Mechanical Dimensions, Mounting and Packaging...............................................78
4.1 Mechanical Dimensions of ELS81-US ............................................................. 78
4.2 Mounting ELS81-US onto the Application Platform ......................................... 80
4.2.1 SMT PCB Assembly ........................................................................... 80
4.2.1.1 Land Pattern and Stencil..................................................... 80
4.2.1.2 Board Level Characterization.............................................. 82
4.2.2 Moisture Sensitivity Level ................................................................... 82
4.2.3 Soldering Conditions and Temperature .............................................. 83
4.2.3.1 Reflow Profile ...................................................................... 83
4.2.3.2 Maximum Temperature and Duration.................................. 84
4.2.4 Durability and Mechanical Handling.................................................... 85
4.2.4.1 Storage Conditions.............................................................. 85
4.2.4.2 Processing Life.................................................................... 86
4.2.4.3 Baking ................................................................................. 86
4.2.4.4 Electrostatic Discharge ....................................................... 86
4.3 Packaging ........................................................................................................ 87
4.3.1 Tape and Reel .................................................................................... 87
4.3.1.1 Orientation........................................................................... 87
4.3.1.2 Barcode Label ..................................................................... 88
4.3.2 Shipping Materials .............................................................................. 89
4.3.2.1 Moisture Barrier Bag ........................................................... 89
4.3.2.2 Transportation Box .............................................................. 91
4.3.3 Trays ................................................................................................... 92