LC7537AN

Ordering number : EN2169C CMOS LSI LC7537, 7537AN, 7537NE Electronic Volume Control System for Audio Equipment Overview The LC7537N is an electronic control LSI capable of electronically controlling the volume, balance, loudness, fader, bass, and treble functions individually with fewer externally connected component parts. Package Dimensions unit : mm 3025B-DIP42S [LC7573N] Features Enables controlling the below-listed functions with 3line serial data, including CE, DI, and CLK. Also, due to 0 V to 5 V swing of the serial data input voltage, permits the use of a general purpose microcomputer. Volume : Separately controls the Lch and Rch volume levels across 81 positions over the 0 dB to –79 dB (in 1 dB steps) range and –∞, and consequently also serves balance control purposes. Loudness : By virtue of a center tap provided at the –20 dB position of the volume controlling ladder resistors, permits loudness to be controlled with externally connected CR components. Fader : By varying only the rear or front output level across 16 positions, provides fader functions (in 2 dB steps over the 0 dB to –20 dB range, and 5 dB steps over the –20 dB to –45 dB range, and at –∞, for a total of 16 positions). Bass/Treble : With CR components externally connected, forms an NF type tone control circuit (Baxandall type) to exercise control across 15 positions over both the bass and treble functions in 2 dB steps. By virtue of its CMOS structure, the LSI operates under a broad power sup...