OCTAL PROGRAMMABLE PCM CODEC
IDT821068
FEATURES
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8 channel CODEC with on-chip digital filters
Programmable A/µ-law compressed or linear code conversion
Meets ITU-T G.711 - G.714 requirements
Programmable digital filter adapting to system demands:
- AC impedance matching
- Transhybrid balance
- Frequency response correction
- Gain setting
Supports two programmable PCM buses and one GCI bus
Flexible PCM interface with up to 128 programmable time slots,
data rate from 512 kbits/s to 8.192 Mbits/s
Broadcast mode for coefficient setting
7 SLIC signaling pins (including 2 debounced pins) per channel
Fast hardware ring trip mechanism
Two programmable tone generators per channel for testing,
ringing and DTMF generation
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Programmable teletax signal generation (12 kHz or 16 kHz)
FSK generator
Two programmable chopper clocks
Master clock frequency selectable: 1.536 MHz, 1.544 MHz, 2.048
MHz, 3.072 MHz, 3.088 MHz, 4.096 MHz, 6.144 MHz, 6.176 MHz or
8.192 MHz
Advanced test capabilities
- 3 analog loopback tests
- 5 digital loopback tests
- Level metering function
High analog driving capability (300
Ω
AC)
TTL and CMOS compatible digital I/O
CODEC identification
+5 V single power supply
Operating temperature range: - 40°C to + 85°C
Package available: 128 pin PQFP
FUNCTIONAL BLOCK DIAGRAM
MPI
INT
RESET
CH1
VIN1
VOUT1
2 Inputs
2 I/Os
3 Outputs
Filter and A/D
D/A and Filter
General
Control Logic
CH5
Filter and A/D
D/A and Filter
VIN5
VOUT5
2 Inputs
2 I/Os
3 Outputs
SLIC Signaling
SLIC Signaling
CH2
CH3
DSP
Core
CH6
CH7
CH4
MCLK
CHCLK1
CHCLK2
CH8
DR1/DD
DR2
DX1/DU
DX2
PLL and Clock
Generation
Serial Interface
PCM/GCI Interface
CCLK
/TS
CS
CI/
CO
DOUBLE
FS BCLK
TSX1 TSX2
/FSC /DCL
The IDT logo is a registered trademark of Integrated Device Technology, Inc
INDUSTRIAL TEMPERATURE RANGE
1
©2003
Integrated Device Technology, Inc.
DECEMBER 08, 2003
DSC-6033/7
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
