User Guide

28／35
VBAT
Module power
supply
3.3 3.6 V
4.3 I/O Interface
Table 15 shows the I/O interface of the M3B module.
Table 15 I/O Interface
Parameter Description Min. Max. Unit
V
IH
High Level Input Voltage 0.7*VDDIO
1)
VDDIO
1)
+0.3 V
V
IL
Low Level Input Voltage -0.3 0.3*VDDIO
1)
V
V
OH
High Level Input Voltage VDDIO
1)
-0.5 VDDIO
1)
V
V
OL
Notes
Low Level Input Voltage 0 0.4 V
1. The voltage of PERST# and W_DISABLE VIL
(max)
is 0.5V.
2. VDDIO voltage is 1.8V
4.4 RF Specifications
Table 16 shows the RF output power and RF receiving sensitivity of the M3B module.
Table 16 RF Output Power
Band Max Min
GSM900 33dBm±2dB 5dBm±5dB
DCS1800 30dBm±2dB 0dBm±5dB
GSM900 (8-PSK) 27dBm±3dB 5dBm±5dB
DCS1800 (8-PSK) 26dBm±3dB 0dBm±5dB
WCDMA B1/B8 24dBm+1/-3dB <-49dBm
uCloudlink M3B Mini PCIe-C _Hardware Design Guide_V1.0