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Renesas IDT821054APF
- Part No.:
- IDT821054APF
- Manufacturer:
- Renesas
- Category:
- CODECS
- Package:
- 64-LQFP
- Datasheet:
-
IDT821054APF.pdf
- Description:
- IC PCM CODEC QUAD MPI 64-TQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
IDT821054APF from Integrated Device Technology is a quad-channel, single-chip PCM CODEC with integrated digital filters, +5 V single-supply operation, industrial temperature range (–40°C to +85°C), and 64-pin TQFP package. It performs A-law/µ-law and linear companding (14 effective bits + 2 sign bits), supports dual programmable PCM buses up to 8.192 Mbits/s, and delivers analog voice I/O for SLIC interfacing in telephony infrastructure.
For engineers reviewing the IDT821054APF datasheet, IDT821054APF pinout, IDT821054APF application, or IDT821054APF equivalent, key selection criteria include its hardware ring trip capability, per-channel dual tone generators, programmable chopper clocks, MPI-controlled Coe-RAM coefficient loading, and support for AC-impedance matching and transhybrid balance in time-division multiplexed voice systems.
Technical Context
The IDT821054APF integrates four independent voice channels, each with dedicated ADC/DAC paths, oversampling converters, and a shared programmable DSP core. Its digital filtering implements AC impedance matching, transhybrid balance, frequency response correction, and gain adjustment - all configurable via Coe-RAM coefficients loaded through the MPI interface.
It supports two fully independent PCM highways (DR1/DX1 and DR2/DX2) with programmable sampling edge, frame sync offset (0–7 BCLK cycles), and flexible time-slot assignment (up to 128 slots). The MPI interface (CCLK/CS/CI/CO) operates at up to 8.192 MHz and controls global/local registers and coefficient memory, enabling real-time adaptation to line conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent voice channels with full-duplex analog I/O and separate SLIC signaling control. |
| Companding | A-law, µ-law, or linear coding (14-bit effective resolution + 2 sign bits) selectable per channel via software. |
| PCM Data Rate | 512 kbits/s to 8.192 Mbits/s; supports 8–128 time slots depending on BCLK frequency (64 kHz increments). |
| Master Clock | 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 - determines DSP timing and sample rate. |
| Analog Drive | 300 Ω AC load drive capability; VOUT pins directly interface with transformers or SLICs without external buffering. |
| Power Supply | +5 V single supply; separate analog (VDDA12/VDDA34/VDDB) and digital (VDDD) rails with dedicated ground pins (GNDA1–4, GNDD). |
| Operating Temp | –40°C to +85°C industrial grade; validated across full voltage and clock range per DSC-6224/3 specification. |
Pinout & Package
Package: 64-pin Thin Quad Flat Package (TQFP), lead-free and RoHS-compliant per ordering information in datasheet DSC-6224/3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1–VIN4 | Analog Input | Four differential-capacitor-coupled voice inputs (0.22 µF), each tied to SLIC receive path; referenced to respective GNDAx. |
| VOUT1–VOUT4 | Analog Output | Four transformer-capable outputs driving 300 Ω AC loads; direct SLIC transmit interface with rail-to-rail swing. |
| SI1_(1–4), SI2_(1–4) | SLIC Signaling Input | Eight debounced signaling inputs (2 per channel) for off-hook/on-hook detection and line state monitoring. |
| SO1_(1–4), SO2_(1–4) | SLIC Signaling Output | Eight open-drain outputs (2 per channel) for battery feed control, loop closure, and supervisory signaling. |
| SB1–SB3_(1–4) | Bi-directional SLIC I/O | Twelve programmable bidirectional pins (3 per channel) supporting custom signaling protocols and polarity reversal. |
| DX1/DX2, DR1/DR2 | PCM Data I/O | Dual independent PCM highways: DX1/DR1 and DX2/DR2 support time-slot-multiplexed voice data transfer up to 8.192 Mbits/s. |
| FS, BCLK, MCLK | Timing Inputs | Frame sync (8 kHz), bit clock (512 kHz–8.192 MHz), and master clock (9 standard frequencies) define PCM framing, sampling, and DSP operation. |
| CHCLK1/CHCLK2 | Chopper Clock Outputs | Two programmable clocks: CHCLK1 (2–28 ms pulse width), CHCLK2 (256 kHz / 512 kHz / 16.384 MHz) for SLIC chopping control. |
| TSX1/TSX2 | Transmit Indicator | Open-drain active-low flags indicating PCM transmission activity on DX1 or DX2 - used for synchronization and diagnostics. |
| INT12/INT34 | Interrupt Outputs | Two open-drain interrupt lines (channels 1–2 and 3–4) reporting SLIC input transitions - enables efficient polling-free event handling. |
| CCLK/CS/CI/CO | MPI Interface | 4-wire serial control bus (up to 8.192 MHz) for configuring registers, loading Coe-RAM coefficients, and reading status. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Ring Trip | Immediate reversal of ringing output upon off-hook detection - eliminates need for external logic or software polling delay. |
| Dual Tone Generators per Channel | Independent programmable generators per channel producing DTMF, ringing, and test tones without host CPU intervention. |
| Programmable Digital Filters | Configurable AC impedance matching, transhybrid balance, and frequency response correction via user-loaded Coe-RAM coefficients. |
| Flexible PCM Interface | Two independent buses with programmable edge sampling, frame offset (0–7 BCLK), and dynamic time-slot assignment (up to 128 slots). |
| Comprehensive Loopback Testing | 3 analog and 5 digital loopback modes plus level metering - enables in-system diagnostics and maintenance without external equipment. |
Applications
| Central Office Switch | PBX Systems |
|---|---|
|
Use Scenario: Line card in Class 5 central office switch handling 4 subscriber lines per device with E&M or FXS signaling. IC Role / Device Role / Timing Role: Quad-channel voice codec providing A-law companding, SLIC interface control, and hardware ring trip for immediate call setup. Use Value: Reduces component count by integrating filters, tone generation, and chopper clocks - eliminates discrete op-amps and timing ICs per channel. |
Use Scenario: Voice port module in enterprise PBX supporting analog station and trunk interfaces with DTMF detection/generation. IC Role / Device Role / Timing Role: PCM CODEC performing linear-to-A-law conversion, dual-tone generation, and SLIC signaling I/O for hybrid analog/digital gateways. Use Value: Enables simultaneous DTMF tone generation and voice encoding on same channel - avoids time-slicing or external tone resources. |
| DLC Remote Terminal | VoIP/IAD Gateway |
|
Use Scenario: Digital loop carrier remote terminal serving rural analog lines over T1/E1 backhaul with low-latency echo cancellation prep. IC Role / Device Role / Timing Role: Front-end CODEC delivering programmable transhybrid balance and frequency response correction to optimize hybrid performance before DSP echo cancellation. Use Value: Improves echo return loss enhancement (ERLE) by >12 dB via on-chip adaptive impedance matching - reduces DSP resource load. |
Use Scenario: Integrated Access Device bridging POTS lines to VoIP networks using G.711-compliant encoding and SIP signaling. IC Role / Device Role / Timing Role: Standards-compliant PCM interface meeting ITU-T G.711–G.714 for voice digitization, with MPI-configurable parameters for interoperability. Use Value: Ensures bitstream compatibility with legacy PSTN and modern VoIP gateways - eliminates transcoding latency and quality loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel PCM CODEC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TLV320AIC3254 | Low-power stereo audio CODEC with integrated miniDSP; lacks SLIC signaling pins, chopper clocks, and hardware ring trip. | Targeted at portable audio and voice UI; not designed for telephony line-card SLIC control or industrial temperature operation. | Select IDT821054APF when SLIC interface, hardware ring trip, and industrial-grade reliability are required - TLV320AIC3254 suits battery-powered endpoints. |
| Maxim MAX11046BCUI+ | Octal 16-bit SAR ADC with serial interface; no DAC, PCM interface, tone generation, or SLIC support - purely data acquisition. | Used in sensor monitoring and industrial DAQ; cannot perform voice encoding/decoding or telephony signaling functions. | IDT821054APF is functionally distinct: it is a complete voice CODEC with telephony-specific features absent in MAX11046BCUI+. |
Compared with TLV320AIC3254 and MAX11046BCUI+, the IDT821054APF uniquely combines quad-channel voice CODEC functionality, SLIC signaling I/O, hardware ring trip, and programmable chopper clocks - making it irreplaceable in carrier-grade telephony line cards where standards compliance and real-time analog control are mandatory.
Availability
IDT821054APF is available at Aetrix Electronics and suitable for Central Office Switch, PBX, DLC, and VoIP/IAD gateway designs requiring stable component supply, long-term lifecycle support, and industrial temperature assurance.
Supply support for IDT821054APF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions.
The IDT821054APF belongs to IDT's telephony CODEC product line, engineered specifically for digital switching infrastructure requiring G.711 compliance, SLIC integration, and programmable signal conditioning in harsh industrial environments.
FAQ
What is the primary function of the IDT821054APF in telephony systems?
The IDT821054APF serves as a quad-channel PCM CODEC that converts analog voice signals to digital PCM streams and vice versa while providing on-chip digital filtering, SLIC signaling control, hardware ring trip, and dual-tone generation. It enables direct interface between analog telephone lines and time-division multiplexed digital backplanes in Central Office Switches, PBXs, and IADs - all within a single +5 V supply and industrial temperature range.
Does the IDT821054APF support both A-law and µ-law companding?
Yes, the IDT821054APF supports software-selectable A-law and µ-law companding per channel, in full compliance with ITU-T G.711. This allows seamless interoperability with North American (µ-law) and European (A-law) PSTN networks. Linear coding (14-bit effective + 2 sign bits) is also supported for applications requiring higher dynamic range or DSP preprocessing.
How does the hardware ring trip feature work in the IDT821054APF?
The IDT821054APF implements a dedicated hardware ring trip mechanism: when an off-hook condition is detected on any SI1/SI2 input pin, the device immediately reverses the corresponding SO1/SO2 output to terminate ringing voltage - bypassing software polling or interrupt latency. This ensures sub-millisecond response critical for regulatory compliance and user experience in telephony line cards.
What are the supported master clock frequencies for the IDT821054APF?
The IDT821054APF accepts nine discrete master clock frequencies: 1.536 MHz, 1.544 MHz, 2.048 MHz, 3.072 MHz, 3.088 MHz, 4.096 MHz, 6.144 MHz, 6.176 MHz, and 8.192 MHz. These frequencies align with standard telephony sampling rates (8 kHz × N) and determine the internal DSP clock domain, enabling precise G.711-compliant voice sampling and filtering.
Can the IDT821054APF operate with different PCM data rates on its two buses?
Yes, the IDT821054APF supports independent configuration of its two PCM buses (DR1/DX1 and DR2/DX2). Each bus can be assigned different BCLK frequencies (512 kHz to 8.192 MHz in 64 kHz steps), frame sync edges, and time-slot offsets - allowing mixed-rate operation such as legacy T1 (1.544 MHz) on one highway and E1 (2.048 MHz) on the other, all under unified MPI control.
IDT821054APF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- PCM, Filter
- Data Interface:
- PCM Audio Interface
- Resolution (Bits):
- -
- Number of ADCs / DACs:
- 4 / 4
- Sigma Delta:
- No
- S/N Ratio, ADCs / DACs (db) Typ:
- -
- Dynamic Range, ADCs / DACs (db) Typ:
- -
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TQFP (14x14)
IDT821054APF FAQ
1.How can I place an order for IDT821054APF through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT821054APF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for IDT821054APF reliable?
The price and inventory of IDT821054APF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT821054APF is usually 5 days.
3.What payment methods are accepted for IDT821054APF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT821054APF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT821054APF?
IDT821054APF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT821054APF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for IDT821054APF?
For technical support, including IDT821054APF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT821054APF requirements.
6.How does Aetrix verify that IDT821054APF is sourced from the original manufacturer or authorized distributors?
All IDT821054APF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that IDT821054APF meets industry standards.
7.What is the process for return or replacement of IDT821054APF?
All IDT821054APF units undergo pre-shipment inspection (PSI). If there is an issue with IDT821054APF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The IDT821054APF part is unused and in its original packaging.
Return procedure for IDT821054APF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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