Renesas 82V2108BBG

Overview

82V2108BBG from Integrated Device Technology is an octal T1/E1/J1 framer IC supporting eight independent line interfaces with full E1 (2.048 MHz), T1 (1.544 MHz), and J1 (1.544 MHz) framing, CRC-4 and CAS multi-frame processing, and integrated HDLC receivers/transmitters. It operates across industrial temperature range (–40°C to +85°C) and supports both master and slave clock modes per channel.

For engineers reviewing the 82V2108BBG datasheet, 82V2108BBG pinout, 82V2108BBG application, or 82V2108BBG equivalent, key selection criteria include octal-channel TDM framing capability, dual-mode (E1/T1/J1) configurability per port, jitter attenuation performance (±50 ppm input tolerance, 0.5 UI peak-to-peak output jitter), and support for inband loopback, PRBS generation/detection, and CAS/RBS signaling buffers.

Technical Context

The 82V2108BBG implements a fully programmable octal framer architecture with independent frame processors (FRMP) and performance monitors (PMON) per channel. Each channel supports E1 basic/CRC-4/CAS frames or T1 SF/ESF formats, with dedicated elastic store buffers (ELSB), receive/transmit system interfaces (RESI/TRSI), and HDLC protocol engines.

It integrates hardware-based alarm detection (RED/AIS), bit-oriented message handling (RBOM/TBOM), and jitter attenuators (RJAT/TJAT) with configurable transfer characteristics (0.1–100 Hz bandwidth). Clocking flexibility includes receive/transmit clock master/slave modes, multiplexed interface options, and parity/offset control per channel.

Key Specifications

Pinout & Package

82V2108BBG is packaged in a 144-pin PBGA (13 mm × 13 mm, 0.8 mm pitch) with bottom-side ball layout. Pin functions are defined per channel group (CH0–CH7), including differential line inputs (RINP/RINN), transmit outputs (TOUTP/TOUTN), system clocks (RSCK/TSCK), frame sync (RSFS/TSFS), and control signals (MRST#, INT#).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal framer applications.

Compared with MAX5895AEG+T and DS2155-NG+, the 82V2108BBG delivers true octal integration with unified register mapping, per-channel jitter attenuation, and native J1 compliance-reducing component count by 7× versus discrete solutions and enabling single-chip E1/T1/J1 interoperability in telecom line cards.

Availability

82V2108BBG is available at Aetrix Electronics and suitable for cellular base station abis interfaces, enterprise TDM gateways, and DSLAM line cards requiring stable component supply and long-term lifecycle support.

Supply support for 82V2108BBG 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, Inc. (IDT) was a U.S.-based semiconductor company specializing in timing, memory interface, RF, and communications ICs before its acquisition by Renesas Electronics in 2019.

The IDT82V2108 product line targets carrier-class TDM infrastructure, delivering multi-standard framer functionality for wireline access networks, wireless backhaul, and legacy protocol bridging applications.

FAQ

What standards does the 82V2108BBG comply with?

The 82V2108BBG complies with ITU-T G.704 (E1 frame structure), G.706 (CRC-4), G.732 (CAS), GR-499-CORE (T1 SF/ESF), and JIA-5001 (J1 framing). It meets ETSI EN 300 233 for E1 physical layer timing and ANSI T1.107 for T1 jitter specifications. All compliance assertions are verified in the official IDT82V2108 datasheet Rev 5.

Does the 82V2108BBG support both E1 and T1 framing on the same device simultaneously?

Yes, the 82V2108BBG supports concurrent E1 and T1 framing - each of its eight channels can be independently configured for E1, T1, or J1 mode via register settings. Channel grouping (e.g., CH0–CH3 as E1, CH4–CH7 as T1) is supported without hardware reconfiguration. This capability is documented in Section 3.1 "T1 / E1 / J1 Mode Selection" of the 82V2108BBG datasheet.

What is the maximum allowable input jitter for reliable 82V2108BBG operation?

The 82V2108BBG accepts input jitter up to ±50 ppm (peak-to-peak) across 10 Hz–100 kHz per ITU-T G.823. Its integrated jitter attenuator (RJAT/TJAT) reduces output jitter to ≤0.5 UI (unit interval) peak-to-peak. These values are measured under full-load conditions with all eight channels active and are specified in Section 3.19 of the 82V2108BBG datasheet.

How is the 82V2108BBG reset and initialized after power-up?

The 82V2108BBG requires assertion of the MRST# pin (active-low) for ≥100 ns after VCC reaches 3.0 V. Internal power-on reset circuitry holds registers in reset until MRST# is deasserted. Initialization proceeds via SPI or parallel host interface writes to configuration registers; default state enables E1 basic framing on all channels. This sequence is detailed in Section 4.1.1 "Default Setting" of the 82V2108BBG datasheet.

Can the 82V2108BBG generate and detect PRBS patterns on all eight channels concurrently?

Yes, the 82V2108BBG includes a dedicated PRBS generator/detector (PRGD) block per channel, allowing independent PRBS-20 pattern generation and error counting on all eight channels simultaneously. Each channel's PRBS engine operates autonomously with separate enable/control registers and status flags. This functionality is confirmed in Sections 3.12.1 and 3.12.2 of the 82V2108BBG datasheet.