OVERVIEW
The SM6452AM/BM are serial-control electronic variable volume ICs for audio applications. They provide electronic volume control for 6 channels, with independent channel gain, attenuation and muting. They feature enhanced digital zip noise suppression. The serial control options are 3-wire interface (SM6452AM) and I2C bus (SM6452BM). The SM6452AM/BM are available in 24-pin SSOP packages.

FEATURES
■ 6-channel input/output (positive-phase-sequence output)
■ Attenuation function
    • 6-channel independent control
    • +16 to 0 to −79dB variable range
    • 1.0 dB/step adjustment
    • Mute function
■ Microcontroller interface
    • 3-wire serial data interface (SM6452AM)
    • I2C bus format 2-wire control (SM6452BM)*1
    • I2C address = 1000000
■ Low noise
    • ≤ 0.002% THD + noise
    • ≤ 10µVrms residual noise
■ 0.5AVDD analog reference voltage source built-in
■ Power supply
    • 7 to 13V analog supply
    • 2.7 to 5.5V digital supply
■ Molybdenum-gate CMOS process
■ 24-pin SSOP