Users Manual Part 1

SIM8260A_Hardware Design_V1.05
www.simcom.com 47 / 122
Figure 24: PCIe interface reference circuit (RC) for RTL8125B

The 220nF AC capacitors should be placed near the PCIe_TX

The PCIe control signal voltage domain of the module is 1.8V, through the level shifter, the
RTL8125B is 3.3V.

For more details about RTL8125B, please refer to Document [17] in the appendix.
Table 26: Recommended RTL8125B and RJ45 list
Name
Manufacturer
Model
RTL8125B
REALTEK
RTL8125B-CG
RJ45
ZhengGu
RJ45-114B4DZ-G020
3.6.3 PCIe Switch
When PCIe switch is added, the module can use W82 and others such as AQR113* at the same time. The
details design please refer to the QPS615 reference circuit document. The following figure is the PCIe
reference circuit.
NOTE