Texas Instruments, DTMF Decoder, 0.5MHz 12mA, 8-Pin SOIC 10, Fabrication Technology: Bipolar, Mounting Type: Surface Mount, Dimensions: 4.9 x 3.9 x 1.45mm, Maximum Operating Supply Voltage: 9 V, Maximum Operating Temperature: +70 °C, Minimum Operating Supply Voltage: 4.75 V, MPN: LM567CM/NOPB