Z8622912PSC

Overview

The Z8622912PSC is a standalone Line 21 decoder manufactured by ZiLOG, designed for closed-captioning and Extended Data Services (XDS) compliance with EIA-608 specifications. It processes Vertical Blanking Interval data from both video fields to extract text and XDS packets such as time of day and program blocking information. The device features programmable on-screen display capabilities for full-screen or Picture-in-Picture windows, violence blocking monitoring, and auto clock set functions. It communicates via an I2C serial bus supporting two selectable addresses and operates within a voltage range of 4.75 V to 5.25 V in a 18-pin DIP package.

Feature Summary

• Complete stand-alone Line 21 decoder providing full compliance with EIA-608 specifications for extended data services.
• Programmable on-screen display generator capable of creating full-screen OSD or captions within Picture-in-Picture windows.
• Automatic extraction and serial output of specific XDS packets including time of day, local time zone, and program blocking data.
• Supports dual selectable I2C communication addresses for flexible host processor integration.

Applications

• Closed captioning and text decoding in television receivers
• Extended Data Services (XDS) processing in set-top boxes
• Violence blocking monitoring inside Picture-in-Picture windows
• Auto clock set functionality for consumer electronics

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential availability constraints. Confirm RoHS compliance status prior to procurement as indicated by specific ordering suffixes. Ensure the selected package variant matches the required PCB footprint and thermal management specifications for the target application environment.

Selection Notes

Select this component when a dedicated hardware solution for NTSC Line 21 data extraction is required without complex microcontroller overhead. Consider the 18-pin DIP package for through-hole assembly requirements. Evaluate the need for dual I2C address support if multiple decoders share the same serial bus in the system design.

Part Context

This part belongs to the Z86229 series of logic ICs specifically engineered for television signal processing. It serves as a specialized peripheral for handling broadcast data streams, distinct from general-purpose microcontrollers. The device integrates video synchronization circuits and character generation logic tailored for legacy analog video standards.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pin compatibility and software register mapping before considering alternative Line 21 decoder components from other manufacturers.

FAQ

How does the Z86229 handle Extended Data Services filtering?

The device includes fully programmable XDS filters that allow the user to recover only specific XDS data packets selected by the host processor, ensuring compatibility with various TV and VCR applications.

What input signals are required for proper operation?

The Z86229 requires a composite NTSC video input (nominal 1.0V p-p) and a CMOS-level horizontal sync input (HIN). An external vertical input is also required if operating in external vertical lock mode for OSD display generation.

Can the device operate in SPI mode?

Yes, the Serial Control Port supports SPI mode operation when the SMS pin is High and the SEN pin is tied High. In this mode, serial data output is available on the SDO pin.