Z8523310FSC

Specialized Overview

The Z85233 is an Enhanced Mono Serial Communication Controller (EMSCC) from Zilog, serving as a single-channel version of the Z85230 ESCC. It supports full-duplex data communications with software compatibility to the SCC family. The device features a 4-byte transmit FIFO and an 8-byte receive FIFO to reduce CPU overhead. It operates at clock speeds up to 16 MHz with a supply voltage range of 4.5V to 5.5V. Key interfaces include standard parallel databus connections and serial control signals like /INT, /DTR/REQA, and /RTSA.

Specialized Feature Summary

• Integrated 4-byte transmit and 8-byte receive FIFOs for improved data handling
• Automatic SDLC packet handling including flag transmission and frame reset
• Simplified CPU hardware interface with relaxed setup time requirements
• Software generation capability for interrupt acknowledge signals

Specialized Applications

• Full-duplex data communications controller systems
• SDLC protocol implementation requiring reduced driver complexity
• Microprocessor families needing less external interface logic

Specialized Procurement Notes

Verify the specific package variant required, as the datasheet details both PQFP and PLCC pin assignments. Confirm that the system design accommodates the specified 4.5V to 5.5V VCC range and 16 MHz maximum clock frequency. Ensure compatibility with existing SCC/ESCC designs if migrating from previous generations.

Specialized Selection Notes

Select this component when a single-channel serial communication solution is needed with enhanced FIFO capabilities compared to standard SCCs. It is suitable for applications requiring automatic SDLC handling and simplified bus interfacing. Consider the available packages (PQFP or PLCC) based on board layout constraints and verify support for the required operating temperature range.

Specialized Part Context

The Z85233 EMSCC belongs to Zilog's SCC family introduced in 1981, utilizing Superintegration Technology. It is functionally related to the Z85230 ESCC but provides only Channel A. The device represents an evolution in serial controllers by reducing CPU overhead through deeper FIFOs and automated protocol handling features.

Specialized Replacement Considerations

The Z85230 ESCC is the dual-channel counterpart. Standard SCC devices may be compatible but lack the enhanced FIFOs and automatic SDLC features. Verify pinout compatibility between PQFP and PLCC packages if substituting physical form factors.