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Product Detailed Parameters
- Description：IC 4MHZ Z80 NMOS SIO/4 44-PLCC
- Series：-
- Mfr：Zilog
- Package：Bulk
- Protocol：-
- Function：-
- Interface：-
- Standards：-
- Voltage - Supply：-
- Current - Supply：-
- Operating Temperature：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The Z0844404VSC is a Serial Input/Output Controller manufactured by Zilog. It implements the SIO/4 architecture based on the Z80 NMOS technology. The device operates at a maximum clock frequency of 4 MHz and supports data transfer rates up to 0.25 MBps. It features two independent serial channels for communication control. The component is housed in a 44-pin Plastic Leaded Chip Carrier (PLCC) package, specifically designated as PQCC44.
Feature Summary
- Dual-channel serial input/output control capability
- Integration of SIO/4 architecture within a single integrated circuit
- NMOS fabrication process ensuring compatibility with standard logic levels
Applications
- Serial communication interface design
- Microcontroller peripheral expansion
- Data acquisition systems requiring serial I/O
Procurement Notes
Verify the specific suffix 'VSC' against manufacturer documentation to confirm package type and lead-free status. Ensure the 44-PLCC footprint matches the target PCB layout. Confirm RoHS compliance requirements if applicable to the end product. Cross-reference the part number with official Zilog or authorized distributor catalogs to avoid counterfeit components.
Selection Notes
Select this component when dual asynchronous serial ports are required without external UART chips. Consider the 4 MHz operational limit and NMOS power characteristics. Evaluate the PLCC44 package constraints for board space and thermal management. Compare against newer CMOS alternatives if lower power consumption is a critical system requirement.
Part Context
This controller belongs to the Zilog SIO family, designed to provide serial communication capabilities for microprocessor-based systems. It complements other Z80-compatible peripherals by handling data transmission and reception tasks, reducing the processing load on the central CPU.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify pin-to-pin compatibility with any potential replacements using official cross-reference guides.
