OCTAL PROGRAMMABLE PCM CODEC
IDT821068
· 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 W 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
FEATURES
· 8 channel CODEC with on-chip digital filters
· Programmable A/m-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
FUNCTIONAL BLOCK DIAGRAM
MPI INT RESET
CH1
CH5
General
Control Logic
Filter and A/D
Filter and A/D
VIN1
VIN5
D/A and Filter
D/A and Filter
SLIC Signaling
VOUT1
VOUT5
2 Inputs
2 I/Os
3 Outputs
2 Inputs
2 I/Os
3 Outputs
SLIC Signaling
DSP
CH2
CH3
CH6
CH7
Core
CH4
CH8
MCLK
CHCLK1
CHCLK2
DR1/DD
DR2
PLL and Clock
Generation
Serial Interface
PCM/GCI Interface
DX1/DU
DX2
TSX1 TSX2
FS BCLK
/FSC /DCL
CI/
DOUBLE
CCLK CS
/TS
CO
The IDT logo is a registered trademark of Integrated Device Technology, Inc
INDUSTRIAL TEMPERATURE RANGE
DECEMBER 08, 2003
1
ã 2003 Integrated Device Technology, Inc.
DSC-6033/7