JAM1LOS/SD2VCC_R3RXOUT-4RXOUT+5VCC_R6GND_T7TXIN+8TXIN-9GND_T10MODSET11TXDIS12VCC_T13MOD-14MOD+15VCC_T16VCC_T17GND_T18LOS/SD_S19GND_R20RXIN+21RXIN-22GND_R23LOSLVL24EP25