QUAD NON-PROGRAMMABLE IDT821024 PCM CODEC DESCRIPTION FEATURES 4 channel CODEC with on-chip digital filters The IDT821024 is a single-chip, four channel PCM CODEC with on- Selectable A-law or m-law companding chip filters. The device provides analog-to-digital and digital-to-analog conversions and supports both a-law and -law companding. The digital Master clock frequency selection: 2.048 MHz, 4.096 MHz or filters in IDT821024 provides the necessary transmit and receive filtering 8.192 MHz for voice telephone circuit to interface with time-division multiplexed - Internal timing automatically adjusted based on MCLK and systems. All of the digital filters are performed in digital signal processors frame sync signal operating from an internal clock, which is derived from MCLK. The fixed Separate PCM and master clocks filters set the transmit and receive gain and frequency response. Single PCM port with up to 8.192 MHz data rate (128 time slots) In the IDT821024 the PCM data is transmitted to and received from Transhybrid balance impedance hardware adjustable via external the PCM highway in time slots determined by the individual Frame Sync components signals (FSR and FSX , where n = 1-4) at rates from 256 KHz to 8.192 n n MHz. Both Long and Short Frame Sync modes are available in the Transmit gains hardware adjustable via external components IDT821024. Low power +5.0 V CMOS technology The IDT821024 can be used in digital telecommunication applications +5.0 V single power supply such as PBX, Central Office Switch, Digital Telephone and Integrated Voice/ Package available: 32 pin PLCC, 44 pin TQFP Data Access Unit. FUNCTIONAL BLOCK DIAGRAM Anolog Front End IIN1 FSX1 PCM TSA 1 CH1 VOUT1 FSR1 FSX2 PCM TSA 2 FSR2 Anolog Front End IIN2 CH2 FSX3 VOUT2 PCM TSA 3 FSR3 DSP FSX4 Anolog Front End PCM TSA 4 IIN3 FSR4 CH3 VOUT3 DX TSC PCM Interface Anolog Front End IIN4 DR CH4 VOUT4 PCLK MCLK Clock PDN 1~ 4 & Control IREF A/m Reference Circuits CNF The IDT logo is a registered trademark of Integrated Device Technology, Inc INDUSTRIAL TEMPERATURE RANGE FEBRUARY 9, 2009 1 2003 Integrated Device Technology, Inc. DSC-6034/4 VCCA AGND VCCD DGNDIDT821024 QUAD NON-PROGRAMMABLE PCM CODEC INDUSTRIAL TEMPERATURE RANGE PIN CONFIGURATIONS PCLK IIN1 5 29 TSC 28 IIN2 6 DGND 27 VOUT2 7 DX VCCA 8 26 32-Pin VCCD 25 IREF 9 PLCC DR 24 AGND 10 FSR1 VOUT3 11 23 FSX1 22 IIN3 12 FSR2 21 IIN4 13 NC 33 1 IIN2 NC 32 2 VOUT2 TSC 3 31 NC DGND 30 4 NC 44-Pin NC 29 5 VCCA TQFP DX 6 28 IREF VCCD 27 7 AGND DR 26 8 NC FSR1 9 25 NC FSX1 24 10 VOUT3 FSR2 23 11 IIN3 2 12 IIN1 IIN4 44 13 VOUT1 VOUT4 43 14 NC 14 NC VOUT1 42 VOUT4 4 15 CNF 15 NC CNF 41 A/m 3 16 NC 16 A/m PDN1 40 FSX4 2 17 PDN1 17 NC PDN2 39 FSR4 1 18 PDN2 18 FSX4 PDN3 38 FSX3 32 19 PDN3 19 FSR4 PDN4 37 FSR3 31 20 PDN4 20 FSX3 MCLK 36 FSX2 30 21 MCLK FSR3 35 22 PCLK FSX2 34