MAX-8 / MAX-M8 - Hardware Integration Manual 
UBX-15030059 - R05  Migration to u-blox 8 / M8 modules  Page 19 of 31 
Production Information     
Pin   MAX-6    MAX-8/M8     Remarks for Migration 
Pin Name  Typical Assignment  Pin Name  Typical Assignment 
11  RF_IN  Matched RF-Input, DC 
block inside. 
RF_IN  Matched RF-Input, DC 
block inside. 
No difference 
12  GND  GND  GND  GND  No difference 
13  ANT_ON  Active antenna or ext. 
LNA control pin in 
power save mode. 
ANT_ON pin voltage 
level: MAX-6 -> 
VCC_RF (pull-up) 
LNA_EN
Ext. LNA control pin in 
power save mode. 
LNA_EN pin voltage level: 
MAX-M8 -> VCC_IO 
(push-pull) 
On MAX-6, ANT_ON pin voltage level 
is with respect to VCC_RF, on MAX-
8 / M8 to VCC_IO 
(only relevant when VCC_IO does not 
share the same supply with VCC)  
 
14  VCC_RF  Can be used for active 
antenna or external 
LNA supply. 
VCC_RF  Can be used for active 
antenna or external LNA 
supply. 
No difference 
15  RESERVED  Leave open.  RESERVED 
(MAX-M8W: 
V_ANT ) 
Leave open.  No difference 
16  SDA  DDC Data  SDA  DDC Data  No difference 
17  SCL  DDC Clock  SCL  DDC Clock  No difference 
18 
SAFEBOOT_N 
Leave open. 
SAFEBOOT_N 
Leave open.  No difference 
Table 5: Pin-out comparison MAX-6 vs. MAX-8 / MAX-M8  
3.3  Software migration 
☞  For an overall description of the module software operation, see the 
u-blox 8 / u-blox M8 Receiver 
Description Including Protocol Specification
 [3]. 
☞  For migration, see 
u-blox M8 FW SPG3.01 Migration Guide
 [8].