DS1481S+

Specialized Overview

The DS1481S+ is a dedicated 1-Wire timing generator and bus master designed for synchronous interface with Dallas Semiconductor 1-Wire devices. It operates on a single 5V supply with a typical active current of 500 µA. The device supports standard and overdrive communication speeds, enabling high-speed data transfer with compatible peripherals. Packaged in a space-saving 14-pin SOIC (150 mil) format, it features dual busy outputs to allow host processors to perform other tasks during I/O operations. Recommended for short networks under 3 inches.

Specialized Feature Summary

• Provides a synchronous interface to 1-Wire devices while allowing print spoolers and other processes to run concurrently.
• Supports cascading multiple units to extend network reach beyond the capabilities of a single device.
• Enables coexistence with parallel port printers by utilizing specific input/output pins to manage busy states and printer signals.

Specialized Applications

• Interface between low-power parallel ports or microcontrollers and 1-Wire devices.
• Short-range 1-Wire networks requiring less than 3 inches of cable length.
• Systems requiring concurrent operation of 1-Wire I/O and host processor tasks such as print spooling.

Specialized Procurement Notes

Verify component authenticity through authorized channels due to discontinued status. Confirm package integrity and pin alignment against the 14-pin SOIC specification. Ensure voltage levels match the 2.7V to 5.5V operating range before integration into legacy systems.

Specialized Selection Notes

Select this component only for existing designs requiring a hardware-based 1-Wire master. Evaluate if software-driven bit-banging offers a more viable alternative for new projects. Consider the DS2480B for applications requiring longer cable lengths or more complex network topologies.

Specialized Part Context

This part belongs to the DS1481 series of 1-Wire bus masters manufactured by Analog Devices Inc./Maxim Integrated. It serves as a specialized interface solution for legacy parallel port environments. The series focuses on hardware-assisted timing generation to reduce host processor overhead during 1-Wire communications.

Specialized Replacement Considerations

Public confirmed substitute: DS1481S/T&R.