| Function Interface Number of Circuits Voltage - Supply Current - Supply Power (Watts) Operating Temperature Mounting Type Package / Case Supplier Device Package | Receiver, DTMF - 1 4.5 V ~ 5.5 V 3.4mA 650mW -40°C ~ 85°C Surface Mount 16-SSOP (0.173, 4.40mm Width) 16-SSOPA |