MCP23017

Absolute Maximum Ratings(†)
Ambient temperature under bias...........................-40°C to +125°C
Storage temperature .............................................65°C to +150°C
Voltage on V_DD with respect to V_SS ...............................0.3 to +5.5V
Voltage on all other pins with respect to V_SS .. -0.6V to (V_DD + 0.6V)
Total power dissipation(note) ................................................700mW
Max. current out of V_SS pin .....................................................150mA
Max. current into V_DD pin .......................................................125 mA
Input clamp current, I_IK (V_I < 0 or V_I > V_DD).........................±20 mA
Output clamp current, I_OK (V_O < 0 or V_O > V_DD) ...................±20 mA
Max. output current sunk by any I/O pin ..................................25 mA
Max. output current sourced by any I/O pin .............................25 mA

Note : Power dissipation is calculated as follows:
           PD_IS = V_DD x {I_DD I_OH} + {(V_DD V_OH) x I_OH} + (V_OL x I_OL)