Z84C9010VSG

Specialized Overview

The Z84C9010VSG is a CMOS Serial/Parallel Counter/Timer KIO peripheral manufactured by Zilog. It integrates a Z84C30 CTC, a Z84C20 PIO, and a Z84C4x SIO into a single 84-pin PLCC package. The device supports bus clock frequencies of 8, 10, and 12.5 MHz; the VSG suffix denotes the 10 MHz variant. It operates on a single +5 V power supply with a voltage range of 4.5 V to 5.5 V. Electrical characteristics specify a maximum operating temperature of +70°C and a minimum of 0°C. The component includes an on-chip oscillator/driver and supports software/hardware resets.

Specialized Feature Summary

• Integrates two independent synchronous/asynchronous serial channels, three 8-bit parallel ports, and four independent counter/timer channels within a single package.
• Features an on-chip clock oscillator/driver that accepts crystal or TTL-compatible inputs to generate MOS-compatible clock outputs.
• Supports Z80 Family interrupt daisy chain with programmable priority levels for internal peripherals.
• Includes command logic for configuring internal interrupt sequences and providing individual software-controlled hardware resets.

Specialized Applications

• System environments requiring integrated serial communication via Monosync, Bisync, or SDLC/HDLC protocols.
• Applications utilizing event counting, interval timing, or serial baud rate clock generation through the CTC unit.
• Interfaces connecting keyboards, printers, or EPROM/PAL programmers using the parallel input/output logic.
• Systems needing bit-programmable I/O expansion via the Parallel Interface Adapter (PIA) port.

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm frequency ratings and package type. Confirm RoHS compliance status as manufacturing processes may have changed over time. Check for moisture sensitivity level requirements during storage and handling. Ensure the source document matches the exact part number to avoid confusion with other frequency variants in the Z84C90 series.

Specialized Selection Notes

Select this component when a Z80-based system requires consolidated I/O functionality without external discrete logic. The 10 MHz speed rating suits systems operating at that specific bus frequency. Consider the 84-pin PLCC package constraints for PCB layout. Evaluate if the integrated serial and parallel capabilities meet the total channel requirements before opting for separate interface chips.

Specialized Part Context

The Z84C9010VSG belongs to the Z84C90 KIO family, which combines multiple Zilog peripheral functions. It is distinct from the Z84C9008VSC (8 MHz) and Z84C9012VSC (12 MHz) due to its specific clock speed designation. The 'V' indicates the PLCC package, while 'S' typically refers to the lead-free or specific environmental compliance variant depending on the revision date.

Specialized Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. The Z84C9010ASC serves as the 10 MHz equivalent in a 100-pin LQFP package but requires different pin mapping and footprint adjustments.