Functional Diagram - Quectel EG91 Series Hardware Design

Physical Characteristics
Temperature Range
Firmware Upgrade
RoHS

2.3. Functional Diagram

The following figure shows a block diagram of EG91 series module and illustrates the major functional
parts.
 Power management
Baseband

DDR + NAND flash

 Radio frequency
 Peripheral interfaces
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EG91-AUX does not support Rx-diversity.
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GNSS antenna interface is only supported on EG91-AUX/-EX/-NA/-NAL/-NAX/-NAXD/-NAXDL/-VX.
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Within operating temperature range, the module is 3GPP compliant.
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Within extended temperature range, the module remains the ability to establish and maintain a voice, SMS, data
transmission, etc. There is no unrecoverable malfunction. There are also no effects on radio spectrum and no harm to radio
network. Only one or more parameters like Pout might reduce in their value and exceed the specified tolerances. When the
temperature returns to normal operating temperature levels, the module will meet 3GPP specifications again.
EG91_Series_Hardware_Design
 Rx-diversity antenna (ANT_DIV)
 GNSS antenna (ANT_GNSS)
 Size: (29.0 ±0.15) mm × (25.0 ±0.15) mm × (2.3 ±0.2) mm
 Package: LGA
 Weight: approx. 3.8 g
 Operating temperature range: -35 °C to +75 °C
 Extended temperature range: -40 °C to +85 °C
 Storage temperature range: -40 °C to +90 °C
 USB interface
 DFOTA
 All hardware components are fully compliant with EU RoHS directive
LTE Standard Module Series
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