Maxim Integrated 71M6521FE-IM/F Lead Free Status / Rohs Status: Lead free / RoHS Compliant Series: * Product Category: Metering Systems on a Chip - SoC RoHS: yes Core: 80515 Processor Series: 80515 Type: Energy Meter IC Maximum Clock Frequency: 64 Hz Program Memory Size: 32 KB Data RAM Size: 2 KB Interface Type: I2C, UART Number of Programmable I/Os: 18 On-Chip ADC: Yes Mounting Style: SMD/SMT Package / Case: QFN-68 Data Bus Width: 8 bit Maximum Operating Temperature: + 85 C Minimum Operating Temperature: - 40 C Operating Supply Voltage: 3.3 V Program Memory Type: Flash Part # Aliases: 90-W6520+X05