SM5951A

SEIKO NPC CORPORATION —1

8-channel DSD Editing System Signal Processor LSI

OVERVIEW

The SM5951A is an 8-channel DSD (Direct Stream Digital) editing system signal processor LSI. It takes 4

DSD input signals per channel, mixes them, and then converts the result back into 1-bit DSD data for output.

FEATURES

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DSD signal sampling rate: 5.6448MHz (128

× 44.1kHz) and 2.8224MHz (64 × 44.1kHz) supported

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8-channel DSD signal mixing

• 8-channel, 4 DSD signal inputs per channel mixing using arbitrary coefficients for each input

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Raw signal switching function (auto bypass)

• Automatically switches to raw signal output with no switching noise and no signal degradation when mix-

ing is not required, bypassing the mixing processing

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Input/output format

• Normal input/output format where the data changes are synchronized to the bit clock cycle, and Manches-

ter-type encoding input/output format where the data inverts during the bit clock cycle

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Monitor output: Simultaneous 64

× 44.1kHz monitor data output when in 128 × 44.1kHz sampling rate mode

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Microcontroller interface: Parallel bi-directional 8-bit/16-bit/32-bit data bus supported

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Master clock: 45.1584MHz (1024

× 44.1kHz) or 56.448MHz (1280 × 44.1kHz)

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2 voltage supplies: 3.3V (3.0 to 3.6V) and 2.5V (2.3 to 2.7V)

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Operating temperature range:

− 20 to 70°C

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Package: 160-pin QFP

PACKAGE DIMENSIONS

(Unit: mm)

ORDERING INFORMATION

Device

Package

SM5951AF

160-pin QFP

28.0 ± 0.1

0.8 ± 0.2

0.22 to 0.4

0.15

0.11 to 0.23

1.6

0.8

0.65

31.2 ± 0.4

15

15

0 to 10.0