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SM5844AF Datasheet(PDF) 1 Page - Nippon Precision Circuits Inc |
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SM5844AF Datasheet(HTML) 1 Page - Nippon Precision Circuits Inc |
1 / 26 page SM5844AF NIPPON PRECISION CIRCUITS—1 NIPPON PRECISION CIRCUITS LTD. Asynchronous Sample Rate Converter OVERVIEW The SM5844AF is a digital audio signal, asynchronous sample rate converter LSI. It reads 16 or 20-bit word length input data, and writes 16, 18, or 20-bit word length output data. It also features a built-in digital deemphasis filter and digital attenuator. The SM5844AF operates from a 5 V supply, and is available in 44-pin QFPs. FEATURES Functions s Left/right-channel processing (stereo) s Input sample rate (fsi) ranges • 24 to 48 kHz (256fsi mode) • 27 to 55 kHz (384fsi mode) s Output sample rate (fso) range • 20 to 100 kHz s Sample rate conversion ratio (fso/fsi) • 0.5 to 2.0 times s Asynchronous input and output timing (clock inputs) s System clock inputs (input and output clocks independent) • 256fsi or 384fsi input system clock • 256fso or 384fso output system clock s Deemphasis filter • IIR-type filter • 44.1, 48 or 32 kHz s Digital attenuator • 11-bit data for 1025 levels • Smooth, incremental attenuation change • +12 dB gain shift function s Direct mute function s Through mode operation • Input to output direct s Output data clocks (LRCO, BCKO) • External input (slave mode) • Output system clock generated internally (master mode) s CMOS-level input/outputs s 5 V (standard) single supply s 44-pin QFP s Molybdenum-gate CMOS process APPLICATIONS s Digital audio equipment, sample rate conversion (audiovisual amplifiers, CD-R, DAT, MD and 8 mm VTRs) s Commercial recording/editing equipment, sample rate conversion s Input data jitter elimination PINOUT PACKAGE DIMENSIONS Unit: mm 44-pin QFP DI BCKI LRCI ICLK ICKSL IFM1 IFM2 OW20N IISN STATE TST1N TST2N RSTN VSS 10.00 0.80 12.80 0.30 +- 0.35 0.10 +- +- 0.60 0.20 |
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