Renesas TW2866-LC1-CRR5456

Overview

TW2866-LC1-CRR5456 from Intersil is a 4-channel analog video decoder, audio codec, and single-channel NTSC/PAL video encoder IC for security DVR systems. It integrates four 10-bit ADCs, adaptive 4H comb filters, IF compensation, CTI, and programmable peaking per channel; supports full D1/CIF time-multiplexed BT.656 output at 54/108 MHz; includes five audio ADCs and one DAC with I²S/DSP interface; and delivers ultra-low power consumption (666.84 mW typical) in a 128-pin LQFP package.

For engineers reviewing the TW2866-LC1-CRR5456 datasheet, TW2866-LC1-CRR5456 pinout, TW2866-LC1-CRR5456 application, or TW2866-LC1-CRR5456 equivalent, key selection considerations include simultaneous 4-channel NTSC/PAL/SECAM decoding with auto-detection, integrated video encoder + dual 10-bit DACs for CVBS/YC output, multi-channel audio mixing capability, and support for both master/slave audio clock modes across industrial-grade surveillance platforms.

Technical Context

The TW2866-LC1-CRR5456 implements four independent analog front ends-each with anti-aliasing filter, 10-bit CMOS ADC, clamp/gain control, and adaptive 4H comb filtering-to separate luminance and chrominance while minimizing cross-color noise. Its digital video path supports ITU-R BT.656 output formatting with selectable time-multiplexed configurations (4× CIF @ 54 MHz or 4× D1 @ 108 MHz).

The device embeds a dedicated video encoder with two 10-bit video DACs driving CVBS and YC outputs, plus an integrated audio subsystem featuring five 10-bit audio ADCs, one 10-bit DAC, decimation/interpolation filters, and configurable I²S/DSP serial interfaces for recording, playback, and mixing-all synchronized via a shared clock PLL generating 108 MHz.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (14 mm × 14 mm), Pb-free, matte tin e3 termination per IPC/JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-channel video decoder and audio codec applications.

Compared with TW2866-LC1-CRR5456, TW2864-LC1-CR reduces integration but increases system-level component count and layout complexity, while ADV7180BCPZ offers higher channel density per mm² only when replicated - neither provides the combined 4-channel decode + encode + 5-input audio mixing in one 128-pin LQFP package.

Availability

TW2866-LC1-CRR5456 is available at Aetrix Electronics and suitable for 4-channel DVR systems, analog-to-IP migration gateways, and embedded security NVR modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for TW2866-LC1-CRR5456 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

Intersil (now part of Renesas Electronics) is a U.S.-based semiconductor company specializing in precision analog, power management, and video interface ICs for industrial, automotive, and communications markets.

The TW2866-LC1-CRR5456 belongs to Intersil's TW28xx family of highly integrated video surveillance processors, designed specifically to consolidate analog video decoding, audio acquisition, and re-encoding functions into a single chip for cost- and space-constrained DVR/NVR platforms.

FAQ

What video standards does the TW2866-LC1-CRR5456 support?

The TW2866-LC1-CRR5456 supports all major analog broadcast standards including NTSC (M/4.43), PAL (B/D/G/H/I/K/L/M/N/60), and SECAM with automatic detection per channel. This ensures compatibility with globally deployed analog CCTV cameras without manual configuration. Each of the four integrated decoders independently identifies and locks to incoming signal standards, enabling mixed-standard operation in multi-camera installations. The TW2866-LC1-CRR5456 also maintains consistent timing alignment across all channels during standard transitions.

Does the TW2866-LC1-CRR5456 include both video decoding and encoding functionality?

Yes, the TW2866-LC1-CRR5456 integrates four independent NTSC/PAL/SECAM video decoders and one dedicated NTSC/PAL video encoder with dual 10-bit CMOS DACs. The encoder drives both CVBS (composite) and Y/C (S-video) analog outputs simultaneously, allowing loop-through or local monitoring while digitizing input feeds. This dual-direction capability makes the TW2866-LC1-CRR5456 uniquely suited for DVR architectures requiring analog passthrough alongside digital recording - a feature not found in decoder-only alternatives like the TW2864-LC1-CR.

How many audio channels can the TW2866-LC1-CRR5456 process simultaneously?

The TW2866-LC1-CRR5456 includes five independent analog audio inputs (AIN1–AIN5) and one stereo-capable audio DAC, supporting simultaneous acquisition and mixing of up to five audio channels. Its integrated audio controller generates digital outputs for recording/mixing via I²S/DSP interface and accepts digital input for playback. The hardware mixer sums all five channels into a single analog output (AOUT), eliminating need for external op-amp networks. This capability is directly implemented in the TW2866-LC1-CRR5456 silicon and verified in the FN8253 datasheet functional description.

What digital video output formats does the TW2866-LC1-CRR5456 support?

The TW2866-LC1-CRR5456 supports ITU-R BT.656-compliant 8-bit parallel output with embedded sync, configurable for either 4× CIF time-multiplexed mode at 54 MHz or 4× D1 time-division-multiplexed mode at 108 MHz. Both modes deliver pixel-accurate timing and frame synchronization across all four channels. The device also supports time-multiplexed output without BT.656 framing for custom FPGA or ASIC interfaces. These output configurations are defined in the TW2866-LC1-CRR5456 register map and validated in the datasheet timing diagrams on pages 134–137.

Is the TW2866-LC1-CRR5456 pin-compatible with other devices in the TW28xx family?

No, the TW2866-LC1-CRR5456 is not pin-compatible with other TW28xx variants such as TW2864-LC1-CR or TW2865-LC1-CR. While sharing the same 128-pin LQFP package footprint, pin assignments differ significantly - particularly for video data buses (VDx), audio interfaces (AINx, AOUT), and control signals (e.g., MPPx, CLKPOx). The TW2866-LC1-CRR5456 pin diagram on page 5 of FN8253 confirms unique signal mapping, and the datasheet explicitly states no mechanical or electrical interchangeability. Board redesign is required when substituting between TW28xx family members.