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Modem Re-Selection

Regional Band Compatibility

We initially selected the EG915N-EA, which only includes bands optimized for usage in Europe and Asia.

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To watch for when selecting a new modem: We want a pin compatible model with the EG915N, as we have already done extensive layout considerations around this footprint, and we want to maintain the 2 supported SIMs. We want bands 7, 12, 13, and 71.

Other models

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https://www.quectel.com/lte-iot-modules/

https://www.quectel.com/download/quectel_eg91xqbg9xeg9x_series_compatible_design_v1-1/

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EG915N-EA

https://www.quectel.com/download/quectel_eg915n_series_hardware_design_v1-2/

Quectel_EG915N_Series_LTE_Standard_Specification_V1.3

BG95M3

https://www.quectel.com/download/quectel_bg95_series_hardware_design_v1-6/

Quectel_BG95_Series_LPWA_Specification_V2.0-4-1.pdf

EG915Q-NA / EG916Q-GL

https://www.quectel.com/download/quectel_eg91xq_series_hardware_design_v1-3/

Quectel_EG916Q-GL_LTE_Standard_Specification_V1.1

Model/Specs, DigiKey CA Link

EG915N-EA (original model)

BG95M3 Series

EG915Q-NA Series

EG916Q-GL Series

$/ct (DigiKey CA)

~$34.52 CAD

~$50.54 CAD

~$54.23 CAD

~$63.99 CAD

Stock (DigiKey CA)

~200

~1,236

~236

~37

Pin-to-pin compatible?

-

Kind of, footprint includes an arc-ed pad

Yes. (need confirmation from more eyes)

Yes . (need confirmation from more eyes)(with few changes, listed below).

LTE Bands

LTE-FDD: B1 / 3 / 7 / 8 / 20 / 28

Cat M1: B1 / 2 / 3 / 4 / 5 / 8 / 12 / 13 / 18 / 19 / 20 / 25 / 26 / 27 / 28 / 66 / 85

Cat NB2: The above and 71, without 26 and 27

LTE-FDD: B2 / 4 / 5 / 12 / 13 / 66

LTE-FDD: B1 / 2/ 3/ 4/ 5/ 7/ 8/ 12/ 13/ 18/ 19/ 20/ 25/ 26/ 28/ 66

LTE-TDD: B34 / 38/ 39/ 40/ 41

# of SIM Interfaces

2

1

2

2

Specs Screenshot

image-20241122-180252.png

image-20241122-180142.pngimage-20241122-182641.png

image-20241122-184757.png

Notes

The package of the EG916Q devices is slightly larger and heavier. The pins are placed in physically identical positions.

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Notable pinout differences between EG915N-EA and EG916Q-GL (includes all EG91xQ-series devices):

  • GNSS debug pins on Q model (109, 110)

  • AUX_RTS and AUX_CTS removed on Q model (now RESERVED pins)

  • USIM2 no longer has a DET pin on Q model (no card detect)

  • Q model uses previously RESERVED pins for CAM SPI functionality (95, 78, 97, 98, 115, 93, 94)

  • Q model has backup power pins for the GNSS antenna (117, 118, 112)

  • Pins for SLEEP and WAKEUP have been renamed (among others)

  • MIC-related pins have been removed (now RESERVED pins: 119, 121, 122, 126, 120)

Layout

Collection of hardware design guideline excerpts from various component datasheets.

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