Renesas IDT821054APF8

Overview

IDT821054APF8 from Integrated Device Technology is a quad-channel, programmable PCM CODEC with integrated digital filters, MPI control interface, and SLIC signaling support. It performs A-law/µ-law and linear 14-bit+2-sign-bit companding, supports dual PCM buses up to 8.192 Mbps, and delivers 300 Ω AC analog drive capability. Used in central office switches and VoIP IADs for voice channel interfacing.

For engineers reviewing the IDT821054APF8 datasheet, IDT821054APF8 pinout, IDT821054APF8 application, or IDT821054APF8 equivalent, key selection criteria include its 64-pin TQFP package, dual programmable chopper clocks (2–28 ms / 256–16.384 MHz), hardware ring trip mechanism, and four independent SLIC signaling channels with debounced inputs.

Technical Context

The IDT821054APF8 integrates a dedicated DSP core for real-time AC impedance matching, transhybrid balance, frequency response correction, and gain adjustment across all four channels. Its digital filtering is implemented via programmable Coe-RAM coefficients, enabling system-specific tailoring without external components.

It features two independent PCM highways (DR1/DX1 and DR2/DX2) with configurable sampling edge (rising/falling BCLK), up to 7-BCLK transmit/receive frame offset, and time-slot assignment flexibility - supporting 8 to 128 slots depending on BCLK (512 kHz–8.192 MHz). All timing parameters are controlled via global register GREG7.

Key Specifications

Pinout & Package

Package: 64-pin TQFP (Thin Quad Flat Package), 10 mm × 10 mm, 0.5 mm pitch, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel PCM CODEC applications.

Compared with TI TLV320AIC3254 and MAX11046BCJ+, the IDT821054APF8 uniquely combines quad-channel A/µ-law CODEC, SLIC signaling I/O, hardware ring trip, and dual chopper clocks - making it irreplaceable for telecom line interface applications requiring ITU-T G.711–G.714 compliance and direct SLIC integration.

Availability

IDT821054APF8 is available at Aetrix Electronics and suitable for central office switches, PBX systems, Integrated Access Devices (IADs), and Digital Loop Carrier (DLC) platforms requiring stable component supply, long-lifecycle support, and industrial temperature operation.

Supply support for IDT821054APF8 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 for communications and computing infrastructure.

The IDT821054APF8 belongs to IDT's legacy telecom CODEC product line, designed specifically for digital telephony line cards requiring integrated SLIC control, hardware-based ring supervision, and programmable voiceband filtering in industrial environments.

FAQ

What is the primary function of the IDT821054APF8 in a telecom system?

The IDT821054APF8 serves as a quad-channel PCM CODEC that digitizes and reconstructs analog voice signals while providing full SLIC signaling control, programmable digital filtering, and hardware ring trip. In telecom systems like central office switches or IADs, the IDT821054APF8 bridges analog subscriber lines to digital TDM networks - performing A/µ-law companding, time-slot assignment, and real-time impedance adaptation without external components.

Does the IDT821054APF8 support both A-law and µ-law companding?

Yes, the IDT821054APF8 supports software-selectable A-law and µ-law companding per channel, as specified in ITU-T G.711. This selection is configured via local registers and applies to both transmit and receive paths. The IDT821054APF8 also supports linear 14-bit + 2 sign-bit coding, allowing flexible integration into systems requiring uncompressed PCM or proprietary encoding schemes.

How does the hardware ring trip feature work in the IDT821054APF8?

The hardware ring trip feature in the IDT821054APF8 detects an off-hook condition on any SLIC signaling input (SI1/SI2) and immediately reverses the state of the corresponding SO1 or SO2 output pin - stopping the ringing voltage without CPU intervention. This deterministic, sub-millisecond response is implemented in dedicated logic within the IDT821054APF8 and requires no firmware polling or interrupt servicing.

What are the supported master clock frequencies for the IDT821054APF8?

The IDT821054APF8 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. These values align with standard T1/E1, ISDN, and VoIP sampling rates. The MCLK frequency determines internal DSP timing and must be selected to match the target PCM data rate and frame structure.

Can the IDT821054APF8 operate with a single +5 V supply?

Yes, the IDT821054APF8 operates from a single +5 V supply, with separate analog (VDDA12, VDDA34, VDDB) and digital (VDDD) power domains internally. Each analog supply pin requires a 0.1 µF bypass capacitor to ground, and the CNF pin requires a 0.22 µF capacitor. This architecture ensures low-noise analog performance while maintaining TTL/CMOS-compatible digital I/O levels - all powered from one regulated +5 V rail.