Z8523320FSG

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 operates on CMOS technology with a gate count of approximately 7000 and supports clock frequencies up to 16 MHz. The device features a 4-byte transmit FIFO and an 8-byte receive FIFO to reduce CPU overhead. Standard test conditions specify a supply voltage range of +4.50 V to +5.50 V. Input high voltage minimums are 2.2 V, while input low voltage maximums are 0.8 V. Typical supply current is 8 mA at 10 MHz and 10 mA at 16 MHz.

Specialized Feature Summary

• Software compatible with existing SCC and ESCC designs while reducing interface logic requirements.
• Includes hardware enhancements such as transmit and receive FIFOs to improve packet handling in SDLC mode.
• Supports software generation of interrupt acknowledge signals to simplify CPU hardware interfaces.

Specialized Applications

• Full-duplex data communications controller applications
• Systems requiring popular serial communication protocols
• SDLC mode packet handling implementations

Specialized Procurement Notes

Verify the specific package variant required for your design, as the datasheet confirms availability in both PQFP and PLCC configurations. Confirm that the operating environment stays within the specified absolute maximum ratings to ensure device reliability. Check the ordering information section of the official documentation for precise temperature ranges and suffix definitions before finalizing procurement plans.

Specialized Selection Notes

Select this component when a single-channel serial controller is sufficient, as it lacks the second channel found in the Z85230. Ensure the system power supply remains stable between 4.5 V and 5.5 V to meet standard test conditions. Consider the reduced external logic benefits if interfacing with microprocessor families that have strict databus setup time requirements.

Specialized Part Context

The Z85233 belongs to the EMSCC family introduced by Zilog in 1981. It utilizes Superintegration Technology to offer improvements over the original SCC series. As a mono version of the Z85230 ESCC, it provides a cost-effective solution for systems needing only one serial channel while maintaining backward compatibility with established SCC software drivers.

Specialized Replacement Considerations

The Z85230 ESCC serves as the dual-channel counterpart to this device. If two independent serial channels are required, the Z85230 should be selected instead. Both devices share software compatibility and core architectural features.