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Renesas IDT821054APFG
- Part No.:
- IDT821054APFG
- Manufacturer:
- Renesas
- Category:
- CODECS
- Package:
- 64-LQFP
- Datasheet:
-
IDT821054APFG.pdf
- Description:
- IC PCM CODEC QUAD MPI 64-TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,651
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Product details
Overview
IDT821054APFG 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 packaging. It performs A-law/µ-law and linear companding (14 effective bits + 2 sign bits), supports two programmable PCM buses up to 8.192 Mbits/s, and delivers analog voice I/O for SLIC interfacing in telephony line cards.
For engineers reviewing the IDT821054APFG datasheet, IDT821054APFG pinout, IDT821054APFG application, or IDT821054APFG equivalent, key selection criteria include dual PCM highway flexibility, hardware ring trip response, programmable chopper clocks (256 kHz/512 kHz/16.384 MHz), on-chip DSP-based transhybrid balance, and MPI-controlled coefficient RAM for AC impedance matching.
Technical Context
The IDT821054APFG integrates four independent voice channels, each with dedicated ADC/DAC paths, oversampling converters, and decimation/interpolation filtering executed by both hardware accelerators and a programmable DSP core. Its signal processing engine implements real-time AC impedance matching, transhybrid balance, frequency response correction, and gain adjustment via coefficient-RAM-loaded digital filters.
It features two fully independent PCM interfaces (DR1/DX1 and DR2/DX2) with programmable sampling edge, frame sync offset (0–7 BCLK cycles), and time-slot assignment (up to 128 slots). Control is handled exclusively through a 4-wire SPI-like Microprocessor Interface (CCLK/CS/CI/CO) supporting up to 8.192 MHz clock and byte-aligned command/data transfers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent voice channels with full-duplex analog I/O and separate SLIC signaling per channel. |
| Companding | A-law, µ-law, or linear coding (14-bit effective resolution + 2 sign bits); selectable per channel via register control. |
| PCM Data Rate | 512 kbits/s to 8.192 Mbits/s; supports 8–128 time slots depending on BCLK frequency (64 kHz step increments). |
| Master Clock (MCLK) | 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 capability; VOUT pins drive transformers directly 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 range for Central Office and PBX deployment. |
Pinout & Package
Package: 64-pin Thin Quad Flat Package (TQFP), lead-free and RoHS-compliant per ordering suffix 'PFG'.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1–VIN4 | Analog Input | Four differential-capable analog voice inputs; each connects to SLIC via 0.22 µF AC-coupling capacitor. |
| VOUT1–VOUT4 | Analog Output | Four voice-frequency receiver outputs; capable of driving 300 Ω AC loads or transformer primaries directly. |
| SI1_(1–4), SI2_(1–4) | SLIC Signaling Input | Eight debounced signaling inputs (2 per channel) for off-hook/on-hook detection and line status monitoring. |
| SO1_(1–4), SO2_(1–4) | SLIC Signaling Output | Eight open-drain outputs (2 per channel) for battery feed control, ringing supervision, and hookswitch emulation. |
| SB1–SB3_(1–4) | Bi-directional SLIC I/O | Twelve programmable bidirectional pins (3 per channel) for flexible SLIC interface configuration (e.g., loop current sense, tip/ring control). |
| DX1/DX2, DR1/DR2 | PCM Data I/O | Dual independent PCM highways; TX/RX direction and time-slot routing controlled per channel via LREG5/LREG6. |
| CHCLK1, CHCLK2 | Chopper Clock Output | CHCLK1: programmable 2–28 ms pulse; CHCLK2: fixed 256 kHz, 512 kHz, or 16.384 MHz output for SLIC chopping. |
| INT12, INT34 | Interrupt Output | Two open-drain interrupt lines - INT12 for channels 1–2, INT34 for channels 3–4 - assert on SLIC input state change. |
| MCLK, BCLK, FS | Clock Inputs | MCLK drives internal DSP; BCLK clocks PCM data transfer; FS provides 8 kHz frame sync - all synchronous and phase-locked. |
| CCLK/CS/CI/CO | MPI Interface | 4-wire serial control bus (SPI-compatible) for configuring registers, Coe-RAM, and SLIC signaling logic. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Ring Trip | Immediate reversal of SOx output upon off-hook detection - eliminates need for software polling or external logic to stop ringing. |
| Programmable Digital Filters | On-chip DSP enables runtime reconfiguration of AC impedance matching, transhybrid balance, and frequency response correction per channel. |
| Dual Tone Generation | Two independent tone generators per channel support DTMF, ringing, and test tone generation without external components. |
| Advanced Test Capability | Three analog loopbacks (TX→RX, RX→TX, analog bypass) and five digital loopbacks enable in-system diagnostics and field maintenance. |
| Flexible PCM Bus Architecture | Two independent PCM highways with programmable edge sampling, frame offset, and time-slot assignment - simplifies integration into multi-processor or distributed switching systems. |
Applications
| Central Office Line Card | PBX Voice Gateway |
|---|---|
|
Use Scenario: High-density line interface in Class 5 telephone switches handling hundreds of subscriber lines. IC Role / Device Role / Timing Role: Primary voice CODEC providing A-law/µ-law conversion, SLIC signaling control, and hardware ring trip for POTS line termination. Use Value: Reduces system latency and improves call setup reliability via deterministic ring trip response and integrated transhybrid balance eliminating external echo cancellers. |
Use Scenario: Analog station port expansion in enterprise PBX systems supporting legacy telephones and fax machines. IC Role / Device Role / Timing Role: Quad-channel voice interface bridging analog phones to TDM backplane; synchronized to 2.048 MHz E1 clock domain. Use Value: Enables compact 4-port line cards with full-feature SLIC control (battery feed, supervision, ringing) and built-in DTMF/tone generation. |
| DLC Remote Terminal | VoIP Media Gateway |
|
Use Scenario: Digital Loop Carrier remote terminal serving rural or low-density areas over copper pairs. IC Role / Device Role / Timing Role: Voice conditioning and framing interface between SLICs and T1/E1 transport layer; operates at −40°C to +85°C ambient. Use Value: Ensures consistent voice quality across long loops via programmable digital filters for frequency response correction and gain tracking. |
Use Scenario: TDM-to-IP gateway converting legacy PSTN traffic to VoIP using DSP-based transcoding. IC Role / Device Role / Timing Role: Front-end CODEC providing linear or compressed PCM samples to host DSP; supports 8.192 Mbits/s data rate for high-channel-count gateways. Use Value: Offloads echo cancellation and line conditioning from host processor via on-chip DSP, reducing firmware complexity and memory footprint. |
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 headset interfaces - not designed for telephony line card or SLIC control. | Select only if replacing legacy analog phone interfaces with USB/I2S-connected endpoints and no SLIC integration required. |
| Maxim MAX11046BCJ+ | 16-bit, 8-channel simultaneous-sampling ADC; no DAC, no PCM interface, no SLIC support, no telephony-specific filtering. | Designed for precision data acquisition - no voiceband filtering, companding, or telephony timing compliance. | Not a functional alternative; consider only for non-telecom sensor data acquisition where CODEC functionality is irrelevant. |
Compared with IDT821054APFG, TI TLV320AIC3254 offers lower power and modern digital audio interfaces but omits telephony-specific features like SLIC signaling, hardware ring trip, and ITU-T G.711 compliance; MAX11046BCJ+ is an unrelated data converter with no CODEC or telephony capability - neither serves as a drop-in or functional substitute for IDT821054APFG in Central Office, PBX, or DLC applications.
Availability
IDT821054APFG is available at Aetrix Electronics and suitable for Central Office Switches, PBX voice gateways, and Digital Loop Carrier (DLC) remote terminals requiring stable component supply, long-lifecycle support, and industrial-grade thermal performance.
Supply support for IDT821054APFG 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.
IDT821054APFG belongs to IDT's legacy telecommunication interface product line, engineered specifically for carrier-grade voice infrastructure including CO switches, PBX systems, and integrated access devices compliant with ITU-T G.711–G.714 standards.
FAQ
What is the primary function of the IDT821054APFG in a telephony system?
The IDT821054APFG serves as a quad-channel PCM CODEC that converts analog voice signals from SLIC circuits into digital PCM streams (and vice versa), while providing integrated digital filtering, SLIC signaling control, hardware ring trip, and dual PCM highway support. It is designed to replace discrete analog front-ends in Central Office, PBX, and DLC systems - enabling compact, high-channel-density line cards with full telephony feature set and industrial temperature operation.
Does the IDT821054APFG support both A-law and µ-law companding?
Yes, the IDT821054APFG supports software-selectable A-law and µ-law companding, as well as linear coding, all configurable per channel via its MPI interface. This allows seamless interoperability with E1 (A-law) and T1 (µ-law) networks, and compatibility with legacy and modern telephony infrastructure without external conversion logic.
How does the hardware ring trip feature work in the IDT821054APFG?
The IDT821054APFG implements hardware ring trip by monitoring SI1/SI2 inputs for off-hook transitions; upon detection, it immediately reverses the state of the corresponding SO1/SO2 output pin to cut ringing voltage - all without CPU intervention or software delay. This deterministic response ensures rapid call establishment and meets strict ITU-T timing requirements for ringing supervision.
What are the supported master clock frequencies for the IDT821054APFG?
The IDT821054APFG accepts nine discrete master clock (MCLK) 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. Each frequency maps to specific telephony sampling rates and frame structures - for example, 2.048 MHz enables E1-aligned 8 kHz sampling, while 8.192 MHz supports high-bandwidth multi-channel configurations.
Can the IDT821054APFG operate with a single +5 V supply?
Yes, the IDT821054APFG operates from a single +5 V supply, with separate analog (VDDA12/VDDA34/VDDB) and digital (VDDD) power domains. All supply pins require local 0.1 µF decoupling to GNDA/GNDD, and CNF requires a 0.22 µF capacitor to ground - ensuring clean power delivery for high-fidelity voice conversion across the full industrial temperature range.
IDT821054APFG 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)
IDT821054APFG FAQ
1.How can I place an order for IDT821054APFG through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT821054APFG 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 IDT821054APFG reliable?
The price and inventory of IDT821054APFG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT821054APFG is usually 5 days.
3.What payment methods are accepted for IDT821054APFG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT821054APFG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT821054APFG?
IDT821054APFG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT821054APFG 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 IDT821054APFG?
For technical support, including IDT821054APFG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT821054APFG requirements.
6.How does Aetrix verify that IDT821054APFG is sourced from the original manufacturer or authorized distributors?
All IDT821054APFG 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 IDT821054APFG meets industry standards.
7.What is the process for return or replacement of IDT821054APFG?
All IDT821054APFG units undergo pre-shipment inspection (PSI). If there is an issue with IDT821054APFG, 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 IDT821054APFG part is unused and in its original packaging.
Return procedure for IDT821054APFG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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