LTE Standard Module Series
EC21 Mini PCIe Hardware Design
EC21_Mini_PCIe_Hardware_Design 43 / 67
6.3. I/O Requirements
The following table shows the I/O requirements of EC21 Mini PCIe.
Table 21: I/O Requirements
1. The PCM and I2C interfaces belong to 1.8V power domain and other I/O interfaces belong to
VCC_3V3 power domain.
2. The maximum voltage value of V
IL
for PERST# signal and W_DISABLE# signal is 0.5V.
6.4. RF Characteristics
The following tables show the conducted RF output power and receiving sensitivity of EC21 Mini PCIe
module.
Table 22: Conducted RF Output Power of EC21 Mini PCIe
Parameter
Description
Min.
Max.
Unit
V
IH
Input High Voltage
0.7 × VCC_3V3
V 0.3
V
V
IL
Input Low Voltage
-0.3
0.3 × VCC_3V3
V
V
OH
Output High Voltage
VCC_3V3 - 0.5
VCC_3V3
V
V
OL
Output Low Voltage
0
0.4
V
Frequency Bands
Max.
Min.
GSM850/EGSM900
33dBm±2dB
5dBm±5dB
DCS1800/PCS1900
30dBm±2dB
0dBm±5dB
GSM850/EGSM900 (8-PSK)
27dBm±3dB
5dBm±5dB
DCS1800/PCS1900 (8-PSK)
26dBm±3dB
0dBm±5dB
WCDMA bands
24dBm+1/-3dB
< -49dBm
NOTES
