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Part: SAA2521
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INTEGRATED CIRCUITS
DATA SHEET
SAA2521 Masking threshold processor for MPEG layer 1 audio compression applications
Preliminary specification File under Integrated Circuits, IC01 August 1993
Philips Semiconductors
Preliminary specification
Masking threshold processor for MPEG layer 1 audio compression applications
FEATURES · Stereo or 2-channel mono encoding · Status may be read continuously · Microcontroller interface · I2S-interfaces · Allocation algorithm including optional emphasis correction (for 44.1 kHz) · Reduced power consumption · 4 V nominal operating voltage capability. ORDERING INFORMATION EXTENDED TYPE NUMBER SAA2521GP Note 1. SOT205-1; 1996 August 23. PACKAGE PINS 44 PIN POSITION QFP MATERIAL plastic GENERAL DESCRIPTION
SAA2521
The SAA2521 performs the adaptive allocation and scaling function for calculating the masking thresholds and sub-band sample accuracy in MPEG layer 1 applications. The SAA2521 is intended for use in conjunction with the stereo filter codec SAA2520.
CODE SOT205AG(1)
August 1993
2
Philips Semiconductors
Preliminary specification
Masking threshold processor for MPEG layer 1 audio compression applications
SAA2521
VDD
handbook, full pagewidth
SWS FS256
31 39
14,24,40
33 FDAF 34 INTERFACE COMPENSATION DELAY INTERFACE 32
FDAC SCL
NODONE RESOL0 RESOL1 FDIR FRESET FSYNC SCALE TEST3 TEST4
20 21 22 37 36 35 38 15 16 CONTROL
SAA2521
ALLOCATION AND SCALING CALCULATION
LTDATA LTCNT1 LTCNT0 LTENA LTCLK CLK24 RESET PWRDWN
5 1 2 3 4 26 23 30
LT INTERFACE
11 7 8 9 10
LTDATAC LTCNT1C LTCNT0C LTENC LTCLKC
6,25,44 VSS
MLB137
Fig.1 Block diagram.
August 1993
3
Others parts begin by sa
SA-1 SA-2 SA-3 SA-4 SA-5 SA-6 SA-7 SA-8 SA-9 SA-10 SA-11 SA-12 SA-13 SA-14 SA-15 SA-16 SA-17 SA-18 SA-19 SA-20 SA-21 SA-22 SA-23 SA-24 SA-25 SA-26 SA-27 SA-28 SA-29 SA-30
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