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SM5844AF Datasheet(PDF) 1 Page - Nippon Precision Circuits Inc

No. de pieza SM5844AF
Descripción Electrónicos  Asynchronous Sample Rate Converter
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Fabricante Electrónico  NPC [Nippon Precision Circuits Inc]
Página de inicio  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM5844AF Datasheet(HTML) 1 Page - Nippon Precision Circuits Inc

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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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