LM567CM

The Texas Instruments LM567CM is a versatile tone decoder IC designed for general-purpose applications. It provides a saturated transistor switch to ground when an input signal is present within its passband. The device utilizes a voltage-controlled oscillator, allowing external components to independently set the center frequency, bandwidth, and output delay.

Key electrical specifications include an adjustable frequency range with a typical ratio of 20:1, a center frequency adjustable from 0.01 Hz to 500 kHz, and a bandwidth adjustable from 0 to 14%. It offers a logic-compatible output with 100-mA current sinking capability. The operating supply voltage ranges from 4.75V to 9V, with a typical current consumption of 12mA and a power rating of 1.1W.

This tone decoder is housed in an 8-SOIC surface-mount package, measuring 4.9mm x 3.91mm. The operating temperature range is from 0°C to 70°C. Its design provides high rejection of out-of-band signals and noise, along with immunity to false signals, making it suitable for various frequency monitoring and control tasks.

Applications for the LM567CM include touch-tone decoding, precision oscillators, frequency monitoring, wideband FSK demodulation, ultrasonic controls, and carrier current remote controls.