SARA-G3 and SARA-U2 series - System Integration Manual 
UBX-13000995 - R26    Appendix  
    Page 203 of 217 
A.4.7  GPIO pins 
The  same compatible external  circuit can be implemented  for SARA-G340  /  SARA-G350 and LISA  series:  four 
1.8 V GPIOs are provided by SARA-G340 / SARA-G350 modules, providing the same functionalities as LISA series 
modules except Module Status and Operating Mode Indications. The SIM_DET pin provides the SIM detection 
function on SARA modules rather than the GPIO5 pin as on LISA-U2 series modules. 
SARA-G300 and SARA-G310 modules do not provide GPIOs. 
 
A.4.8  Reserved pins 
SARA modules RSVD pin 33 must be connected to ground, as does the RSVD pin 5 on LISA modules. 
 
A.4.9  Pin-out comparison between LISA and SARA-G3 
Table 68 summarizes the pin electrical differences between LISA and SARA-G3 cellular modules. 
Normal op. range: 
 3.35 V – 4.5 V  
Extended op. range: 
 3.00 V – 4.5 V  
High  pulse  current 
due to GSM TDMA 
Normal op. range: 
 3.3 V – 4.4 V  
Extended op. range: 
 Not applicable 
No  high  pulse  current 
due to CDMA 
Normal op. range: 
 3.4 V – 4.2 V  
Extended op. range: 
 3.1 V – 4.2 V  
High  pulse  current  
due to GSM TDMA 
Normal op. range: 
 3.3 V – 4.4 V  
Extended op. range: 
 3.1 V – 4.5 V  
High  pulse  current  
due to GSM TDMA 
Output characteristics: 
 2.3 V typ, 2 mA max 
Input op. range: 
 1.0 V – 2.4 V  
Output characteristics: 
 2.3 V typ, 3 mA max 
Input op. range: 
 1.0 V – 2.5 V  
Output characteristics: 
 1.8 V typ, 3 mA max 
Input op. range: 
 1.0 V – 1.9 V  
Output characteristics: 
 1.8 V typ, 50 mA max 
Output characteristics: 
 1.8 V typ, 50 mA max 
Output characteristics: 
 1.8 V typ, 50 mA max 
Output characteristics: 
 1.8 V typ, 50 mA max 
RF input/output for Tx/Rx 
antenna  
RF input/output for 
Tx/Rx antenna  
RF input/output for 
Tx/Rx antenna  
RF input/output for 
main Tx/Rx antenna  
LISA-U230 only:  
 RF  input  for  
 Rx diversity antenna 
SARA-G340/SARA-G350: 
 Input for antenna  
 detection circuit 
Internal antenna 
detection circuit 
Internal antenna 
detection circuit 
No internal pull-up 
L-level: -0.10 V – 0.65 V  
H-level: 2.00 V – 4.50 V  
ON L-level time: 
 5 ms min 
OFF L-level pulse time: 
 Not Available 
180 k internal pull-up 
L-level: -0.30 V – 0.30 V  
H-level: 2.00 V – 4.70 V  
ON L-level pulse time: 
 150 ms min 
OFF L-level pulse time: 
 Not Available 
No internal pull-up 
L-level: -0.30 V –0.65 V  
H-level: 2.00 V – 4.50 V  
ON L-level pulse time: 
 5 ms min 
OFF L-level pulse time: 
 Not Available 
No internal pull-up 
L-level: -0.30 V – 0.65 V  
H-level: 1.50 V – 4.40 V  
ON L-level pulse time: 
 50 µs min / 80 µs max 
OFF L-level pulse time: 
 1 s min 
Internal diode & pull-up 
L-level: -0.30 V – 0.30 V  
H-level: 2.00 V – 4.70 V  
Reset L-level pulse time: 
 SARA-G340/SARA-G350: 
 50 ms min  
 SARA-G300/SARA-G310: 
 3 s min  
550  internal pull-up 
L-level: -0.30 V – 0.63 V  
H-level: 1.32 V – 2.10 V  
Reset L-level pulse time: 
 300 ms min 
10 k internal pull-up 
L-level: -0.30 V – 0.65 V  
H-level: 1.69 V – 2.48 V  
Reset L-level pulse time: 
 50 ms min 
10 k internal pull-up 
L-level: -0.30 V – 0.51 V  
H-level: 1.32 V – 2.01 V  
Reset L-level pulse time: 
 50 ms min