Features: *4 channel CODEC with on-chip digital filters
*Software selectable compressed (A/m-law) or linear code con-version
*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
*GCI (IOM-2) control interface
*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
*FSK generator
*Two programmable chopper clocks
*Master clock frequency selectable: 2.048 MHz or 4.096 MHz
*Advanced test capabilities
- 3 analog loop back tests
- 5 digital loop back tests
- Level metering function
*High analog driving capability (300W AC)
*TTL and CMOS compatible digital I/O
*CODEC identification
*+5 V single power supply
*Low power consumption
*Operating temperature range: -40 to +85
*Package available: 64 pin PQFP
Pinout
Specifications
| Rating |
Com'I &Ind'I |
Unit |
| Power Supply Voltage |
6.5 |
V |
Voltage on Any Pin with Respect
to Ground |
-0.5 to 5.5 |
V |
| Package Power Dissipation |
1.5 |
W |
| Storage Temperature |
-65 to +150 |
|
DescriptionThe IDT821064 is a feature rich, single-chip, programmable 4 chan-nel PCM CODEC with on-chip filters. Besides the m-Law/A-Law companding and linear coding/decoding (14 effective bits + 2 extra sign bits), IDT821064 also provides 1 FSK generator (can be used for sending Caller-ID messages), 2 programmable Tone generators per channel (which can also generate ring signals) together with 2 programmable chopper clocks for SLIC.
The digital filters in IDT821064 provide the necessary transmit and receive filtering for voice telephone circuit to interface with time-division multiplexed systems. An integrated programmable DSP realizes AC Impedance Matching, Transhybrid Balance, Frequency Response Correction and Gain Setting functions. The device also provides 7 signaling pins to SLIC on per channel basis.
The IDT821064 has a General Control Interface (GCI), which is also known as ISDN Oriented Module (IOM® -2). The IDT821064 supports both compressed and linear data format. This function provides convenience for the VoXXX applications.
IDT821064 also offers strong test capability with several analog/digital loopbacks and level metering function. It brings convenience to system maintenance and diagnosis.
A unique feature of !(R)Hardware Ring Trip! is implemented in IDT82106 When off-hook signal is detected, IDT821064 can reverse an output pin to stop ringing immediately.
The IDT821064 can be used in Integrated Access Devices (IADs), i.e.VoIP and VoDSL.
IDT821064 Data Sheet
