CBTW28DD14ET,118

Overview

The CBTW28DD14ET,118 is a dual-channel I2C-bus and SMBus multiplexer switch manufactured by NXP Semiconductors. It facilitates the connection of multiple downstream devices to a single upstream I2C or SMBus host controller. The device supports standard-mode (100 kbit/s), fast-mode (400 kbit/s), and fast-mode-plus (1 MHz) data rates. It features independent channel control via address pins, allowing for flexible configuration of up to eight downstream ports using two address inputs. The component operates within a supply voltage range of 1.65 V to 5.5 V, ensuring compatibility with various logic families. It includes built-in glitch filtering on input lines to enhance signal integrity in noisy environments.

Feature Summary

• Dual-channel switching capability for I2C and SMBus protocols
• Independent channel control through dedicated address pins
• Glitch filtering on input lines for improved noise immunity
• Wide operating voltage range supporting diverse logic levels

Applications

• Connecting multiple sensors or peripherals to a single I2C bus master
• SMBus system management in industrial equipment
• Signal routing in embedded systems requiring bus expansion

Procurement Notes

Verify the complete ordering code including the suffix ',118' which indicates reel packing specifications. Confirm package type availability matches design requirements. Check for lifecycle status updates as components may transition to end-of-life phases. Ensure compatibility with existing PCB footprint dimensions during procurement planning.

Selection Notes

Select this component when bus isolation or selective routing between I2C/SMBus devices is required. Consider the operating voltage range relative to the system's power rails. Evaluate the number of downstream devices against the available address pin configurations. Verify signal speed requirements align with standard, fast, or fast-mode-plus capabilities.

Part Context

This part belongs to NXP's I2C-bus multiplexer family designed for system integration. It complements other bus interface solutions by providing scalable connectivity options. The component is commonly used alongside level shifters and buffer drivers in complex electronic architectures requiring robust communication pathways.

Replacement Considerations

Consult official replacement guides for compatible alternatives if this specific variant is unavailable. Verify pin-to-pin compatibility and electrical parameter equivalence before substitution. Review updated datasheets for any functional differences in recommended substitute parts.