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Model/Specs, DigiKey CA Link | ||||
|---|---|---|---|---|
$/ct (DigiKey) | ~$34.52 CAD | ~$50.54 CAD | ~$54.23 CAD | ~$63.99 CAD |
Stock (DigiKey) | ~200 | ~1,236 | ~236 | ~37 |
Dimensions | 19.9x23.6, 2.4mm | 19.9x23.6, 2.2mm | 19.9x23.6, 2.4mm | 22.5x26.5, 2.4mm |
Pin-to-pin compatible? | - | Kind of, footprint includes an arc-ed pad | Yes. (need confirmation from more eyes) | Yes (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 *EG915Q-AF model has bands 14 and 71 on top; however, can’t find it on DigiKey. | 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 |  |  |  |  |
Notes | The package of the EG916Q devices is slightly larger and heavier. The pins are placed in physically identical positions. |
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Due to this being several mm bigger than the EG915N, the existing placement and routing would have to be heavily adjusted. |
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)
Final Selection
EG915Q-NA selected. See chat in #rpi-interface-rev-c for more.
Model is available on DigiKey Canada
2 SIM connections, USB 2.0
Has bands 12 and 13, the low frequency bands best for long-range communications
Missing 7 and 71 but these high-speed bands matter less for the purpose of the device
Exact same footprint as EG915N-EA (routing won’t have to be redone)
Layout
Collection of hardware design guideline excerpts from various component datasheets.
Quectel_EG915N_Series_Hardware_Design_V1.2.pdf
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https://www.quectel.com/download/quectel_eg91xq_series_hardware_design_v1-3/
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