pixalynx/nrf9151-gps-tracker

research/sim-esim.md

# SIM switch and MFF2 eSIM notes (verified 2026-09-23)

## NX3DV2567 (Nexperia NX3DV2567-Q100 data sheet rev 1.1, 4 Oct 2023)

- 4PDT switch "optimized for switching WLAN-SIM supply, data and control signals", VCC 1.4-4.3 V, one select input S
  with a low threshold (1.8 V logic at VCC 3.6 V).
- Pins (HXQFN16 3 x 3, SOT1039-2): 1 1Y0, 2 S, 3 2Y1, 4 2Z, 5 2Y0, 6 GND, 7 3Y1, 8 3Z, 9 3Y0, 10 n.c., 11 4Y1, 12 4Z,
  13 4Y0, 14 VCC, 15 1Y1, 16 1Z. Switch 1 = supply switch (RON 0.5 Ω typ at 1.8 V), switches 2-4 = data (7 Ω).
- Function table: S = L → nZ-nY0, S = H → nZ-nY1. Break-before-make.
- JLC: C2652485 NX3DV2567HR-Q100X (22 in stock), C2652474 NX3DV2567HR,115, C52098293 NX3DV2567HR-TP (980, second
  source, same pin names in its EasyEDA symbol; footprint centre pad 1.6 mm vs 1.9 mm).

## nRF9151 DK (PCA10171) sheet 7 "SIM card, eSIM, and selection switch"

SiP SIM bus (1V8, RST, CLK, IO) → switch COM; NO path → TPD3F303 (D5) → nano-SIM J5 (C1 VSIM, C2 RST, C3 CLK,
C7 DATA, C5 GND, C48 10 nF on VSIM); NC path → U6 MFF2 footprint "MFFx_M2M_UICC" (not mounted): pin 8 SIM VCC,
7 SIM RST, 6 SIM CLK, 3 SIM DATA, 1 GND, 2/4/5 N.C., C49 N.C. The select line comes from the board controller with
R62 1 MΩ / R63 100 kΩ. This board uses the same topology with S driven by P0.25 and a 100 kΩ pull-down, so the
nano-SIM is selected at power-on.

## MFF2 (ETSI TS 102 671 V9.1.0, §6.2.2 and annex A)

- Body 6.00 x 5.00 mm, contacts b 0.40 x L 0.60 mm at 1.27 mm pitch on the 6 mm sides, exposed heat feature ≥ 3.30 x
  3.90 mm that is electrically insulated, orientation mark at contact C5.
- Package pin → contact: 1 C5 GND, 2 C6, 3 C7 I/O, 4 C8, 5 C4, 6 C3 CLK, 7 C2 RST, 8 C1 VCC (matches the DK).
- Annex A PCB layout: inner land edges 4.30 mm apart, outer 6.31 mm → 1.0 mm long lands centred ±2.65 mm.
- LCSC/JLC do not stock MFF2 eUICCs; they are ordered from the connectivity provider (e.g. Velocity IoT "VIoT-Flex"
  MFF2: Infineon SLM17ECB800B, Kigen OS, 1.62-5.5 V, classes A/B/C) and consigned.