Z8623012SSG

Overview

The Z86230 is a stand-alone integrated circuit designed to process Extended Data Services (XDS) located in Field 2 of the Vertical Blanking Interval (VBI). It conforms to EIA-608A and EIA-744A specifications. The device extracts XDS data from composite video inputs and provides a selectable Program Blocking (PB) signal or recovered XDS data packets via an I2C serial interface. It supports both NTSC and PAL video standards, operates on a 12-MHz internal VCO, and functions within a power supply range of 4.75 V to 5.25 V. The component is available in 18-pin DIP and SOIC packages.

Feature Summary

• Extracts XDS data from Line 21 of the incoming video signal for violence blocking and other services.
• Outputs a selectable Program Blocking (PB) signal based on user-defined content advisory ratings.
• Features a fully programmable I2C serial communication port with two selectable slave addresses.
• Supports configurable NTSC or PAL operation modes for global compatibility.

Applications

• Television sets requiring V-Chip functionality
• Video Cassette Recorders (VCRs)
• Set-top boxes

Procurement Notes

Verify that the specific ordering suffix matches the required package type, as the Z86230 is available in both 18-pin DIP and SOIC configurations. Confirm the I2C address selection pin state aligns with system design requirements before integration. Ensure external components such as the reference resistor and loop filter capacitors meet the specified tolerances for proper operation.

Selection Notes

Select this component when a dedicated hardware solution for NTSC or PAL XDS decoding is required without complex microcontroller overhead. Consider the availability of preprogrammed XDS filter parameters and the ability to output raw or filtered data through the serial port. Evaluate the need for dual slave address support if multiple devices share the same I2C bus in the target application.

Part Context

The Z86230 belongs to ZiLOG's family of video ICs specifically engineered for television decoder circuits. It serves as a specialized processor for vertical blanking interval data, distinct from general-purpose microcontrollers like the Z8 series. Its primary role is to handle compliance with television transmission standards regarding content advisory and program blocking.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should verify pinout and register compatibility if considering alternative vendors for similar Line 21 decoders.

FAQ

How does the Z86230 determine the correct horizontal timing?

The device uses either the HIN input signal or an external 32.768-kHz crystal connected to the XIN pin to bring the internal voltage-controlled oscillator close to the required operating frequency.

What is the function of the RREF pin?

The RREF pin requires an externally connected 10 kOhm ±2% resistor to establish the voltage and current reference levels used throughout the internal circuitry.

Can the Z86230 operate with PAL video signals?

Yes, the device can be configured to operate in PAL mode, where it decodes information encoded into VBI Line 22 using the waveform and command structure defined for NTSC Line 21.