Product Summary

The IDT821068 is a feature rich, single-chip, programmable 8channel PCM CODEC with on-chip filters. Besides the A-Law/ -Lawcompanding and linear coding/decoding (16-bit 2’s complement),IDT821068 provides 2 programmable Tone generators per channel(which can also generate ring signals), 1 FSK generator, 1 program-mable Teletax Signal generator and 2 programmable chopper clocksfor SLIC.The digital filters in IDT821068 provide the necessary transmit andreceive filtering for voice telephone circuit to interface with time-divisionmultiplexed systems. An integrated programmable DSP realizes ACImpedance Matching, Transhybrid Balance, Frequency ResponseCorrection and Gain Setting functions. The IDT821068 supports 2PCM buses with programmable sampling edge, that allows an extradelay of up to 7 clocks. Once the delay is determined, it is effective toPIN CONFIGURATIONSSB2_5SO1_5SO2_5SO3_5GND56MPICSCCLK/TSCI/DOUBLECOINTNCNCNCNCNCNCNCNCRESETNCGND12SO3_1SO2_1SO1_1SB2_1?IOM-2 is a registered trademark of Siemens AG.INDUSTRIAL TEMPERATURE RANGEall eight channels of IDT821068. The device also provides 7 signalingpins to SLIC on per channel basis

Parametrics

Specifications of IDT821068PX
Number Of Adc's 8 Number Of Dac's 8
Interface Type Serial Power Supply Type Analog/Digital
Operating Supply Voltage (min) 4.75V Operating Supply Voltage (typ) 5V
Operating Supply Voltage (max) 5.25V Pin Count 128
Operating Temperature (min) -40C Operating Temperature (max) 85C
Screening Level Industrial Package Type PQFP
Mounting Surface Mount Lead Free Status / Rohs Status Not Compliant

Features

8 channel CODEC with on-chip digital filtersProgrammable A/ -law compressed or linear code conversionMeets ITU-T G.711 - G.714 requirementsProgrammable digital filter adapting to system demands:- AC impedance matching- Transhybrid balance- Frequency response correction- Gain settingSupports two programmable PCM buses and one GCI busFlexible PCM interface with up to 128 programmable time slots,data rate from 512 kbits/s to 8.192 Mbits/sBroadcast mode for coefficient setting7 SLIC signaling pins (including 2 debounced pins) per channelFast hardware ring trip mechanismTwo programmable tone generators per channel for testing,ringing and DTMF generationFUNCTIONAL BLOCK DIAGRAMVIN1VOUT12 Inputs2 I/OsSLIC Signaling3 OutputsMCLKPLL and ClockCHCLK1GenerationCHCLK2The IDT logo is a registered trademark of Integrated Device Technology, IncINDUSTRIAL TEMPERATURE RANGE2003 Integrated Device Technology, Inc.OCTAL PROGRAMMABLE PCM CODECProgrammable teletax signal generation (12 kHz or 16 kHz)FSK generatorTwo programmable chopper clocksMaster clock frequency selectable: 1.536 MHz, 1.544 MHz, 2.048MHz, 3.072 MHz, 3.088 MHz, 4.096 MHz, 6.144 MHz, 6.176 MHz or8.192 MHzAdvanced test capabilities- 3 analog loopback tests- 5 digital loopback tests- Level metering functionHigh analog driving capability (300TTL and CMOS compatible digital I/OCODEC identification+5 V single power supplyOperating temperature range: - 40°C to + 85°CPackage available: 128 pin PQFP

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