DS2408S+T&R

Overview

The DS2408S+T&R is an 8-channel programmable I/O device utilizing the 1-Wire interface, housed in a 16-pin SO package. It operates within a voltage range of 2.8V to 5.25V and supports temperatures from -40°C to +85°C. The component features open-drain outputs with a maximum on-resistance of 100Ω and typical off-resistance of 10MΩ. It communicates at standard speeds up to 15.3kbps or overdrive speeds up to 100kbps. Each unit contains a unique factory-lasered 64-bit registration number for addressing. Standby supply current is typically 1µA.

Feature Summary

• Eight independent programmable I/O channels with open-drain outputs
• Individual activity latches capture asynchronous state changes for bus master interrogation
• Built-in multidrop controller ensures compatibility with other 1-Wire network products
• Supports conditional search commands based on programmable PIO conditions

Applications

• Port expander for microcontrollers
• Remote multichannel sensor and actuator systems
• Communication and control units for microterminals
• Network interface for microcontroller applications

Procurement Notes

Verify the specific ordering suffix T&R indicates tape and reel packaging when sourcing this component. Confirm that the lead-free designation (+) aligns with environmental compliance requirements for your assembly process. Ensure the 16-pin SO package dimensions match your PCB footprint specifications before finalizing procurement orders.

Selection Notes

Select this component when a single digital signal is required to control multiple independent I/O lines. It is suitable for applications requiring robust communication over long distances using the 1-Wire protocol. Consider the optional VCC pin for maintaining PIO states during bus power absence. Verify that the open-drain output characteristics meet the load requirements of the connected peripheral devices.

Part Context

This part belongs to the DS2408 series of 1-Wire addressable switches manufactured by Analog Devices Inc./Maxim Integrated. It shares functional similarities with other members of the family but is distinguished by its specific 8-channel configuration and 16-pin SO package. The T&R suffix denotes the specific tape and reel packaging format used for automated surface-mount assembly processes.

Replacement Considerations

The DS2408S+ is the tube-packaged equivalent of this component. Verify that the package type change from tape and reel to tube does not impact automated assembly workflows. No alternative part numbers are confirmed as direct functional substitutes in the provided documentation.