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SM5844 Datasheet

  • SM5844

  • Nippon Precision Circuits Inc [Asynchronous Sample Rate Con...

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SM5844AF
NIPPON PRECISION CIRCUITS LTD.
Asynchronous Sample Rate Converter
APPLICATIONS
s
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 铿乴ter and digital
attenuator.
The SM5844AF operates from a 5 V supply, and is
available in 44-pin QFPs.
s
s
Digital audio equipment, sample rate conversion
(audiovisual ampli铿乪rs, CD-R, DAT, MD and 8
mm VTRs)
Commercial recording/editing equipment, sample
rate conversion
Input data jitter elimination
PINOUT
THRUN
BCKO
LRCO
OCLK
OCKSL
SLAVE
DOUT
DI
FEATURES
Functions
s
s
s
s
s
s
PACKAGE DIMENSIONS
Unit: mm
44-pin QFP
12.80 + 0.30
-
10.00
s
s
s
12.80 + 0.30
-
MLEN/DEEM
OW18N
DMUTE
VDD
s
s
s
s
s
s
0.17 + 0.05
-
0 to 0.20
NIPPON PRECISION CIRCUITS鈥?
1.75MAX
Left/right-channel processing (stereo)
Input sample rate (fsi) ranges
鈥?24 to 48 kHz (256fsi mode)
鈥?27 to 55 kHz (384fsi mode)
Output sample rate (fso) range
鈥?20 to 100 kHz
Sample rate conversion ratio (fso/fsi)
鈥?0.5 to 2.0 times
Asynchronous input and output timing (clock
inputs)
System clock inputs (input and output clocks
independent)
鈥?256fsi or 384fsi input system clock
鈥?256fso or 384fso output system clock
Deemphasis 铿乴ter
鈥?IIR-type 铿乴ter
鈥?44.1, 48 or 32 kHz
Digital attenuator
鈥?11-bit data for 1025 levels
鈥?Smooth, incremental attenuation change
鈥?+12 dB gain shift function
Direct mute function
Through mode operation
鈥?Input to output direct
Output data clocks (LRCO, BCKO)
鈥?External input (slave mode)
鈥?Output system clock generated internally
(master mode)
CMOS-level input/outputs
5 V (standard) single supply
44-pin QFP
Molybdenum-gate CMOS process
VSS
SM5844AF
BCKI
LRCI
ICLK
ICKSL
IFM1
IFM2
RSTN
TST2N
TST1N
STATE
IISN
OW20N
MCOM
MDT/FSI1
MDT/FSI2
10.00
0.60 + 0.20
-
0.80
0.35 + 0.10
-
1.45
0 to 10

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