ASC8851ET/M2,557

Overview

The ASC8851ET/M2,557 is a single-chip system-on-chip (SoC) designed for full HD IP cameras. It integrates an ARM926EJ-S CPU running at up to 600 MHz with dedicated hardware for image processing and video compression. The device supports up to 12 MPixels raw data input and performs digital WDR, noise reduction, and auto white balance. It compresses video into H.264, MPEG-4, or MJPEG formats and transmits it via an integrated 10/100/1000 Ethernet MAC. Key specifications include support for up to 1080p @ 45 fps H.264 encoding, two SDRAM channels supporting up to 2 GB total memory, and advanced data encryption capabilities.

Feature Summary

• ARM926EJ-S processor operating at up to 600 MHz
• Supports up to 12 MPixels sensor resolution with 16-bit raw data input
• Hardware compression engine for H.264 (up to 1080p @ 45 fps), MPEG-4, and MJPEG
• Integrated 10/100/1000 Ethernet MAC and USB 2.0 OTG

Applications

• Security IP cameras
• Video conferencing systems
• Video door phones and intercoms
• Industrial vision applications

Procurement Notes

Verify the specific M2 suffix requirements against current NXP documentation, as datasheet notes indicate differences between M1 and M2 versions. Confirm availability status, as this component family may be subject to discontinuation notices. Ensure compatibility with required Linux 2.6 software development kits and reference designs for integration.

Selection Notes

Select the ASC8851ET/M2,557 when high-performance H.264 encoding at 1080p @ 45 fps is required. This model supports up to 12 MPixels sensor input, distinguishing it from lower-resolution variants like the ASC884x series. It provides dual SDRAM channels for up to 2 GB memory capacity, suitable for complex multi-stream encoding scenarios requiring significant buffer space.

Part Context

This component belongs to the NXP ASC884x and ASC885x family of SoCs. These products are pin-to-pin and software-compatible within the family, allowing for flexible design upgrades. The ASC885x series specifically targets higher resolution inputs (up to 12 MPixels) compared to the ASC884x series (up to 5 MPixels).

Replacement Considerations

The ASC884x series offers pin-to-pin compatibility but with lower maximum sensor resolutions (5 MPixels) and reduced CPU frequencies (400-500 MHz). Verify if the performance constraints of the ASC884x variants meet the application's bandwidth and resolution requirements before substitution.