ADG3249BRJ-REEL

Analog Switches, Multiplexers, Demultiplexers Overview

The ADG3249 is a 2.5 V/3.3 V, high-performance 2:1 multiplexer/demultiplexer bus switch designed on a low voltage CMOS process. It features extremely low propagation delay of 225 ps and small signal bandwidth of 610 MHz. The device supports selectable level shifting between 3.3 V to 2.5 V, 3.3 V to 1.8 V, and 2.5 V to 1.8 V via the SEL pin. On-resistance is typically 4.5 Ω with matching of 0.5 Ω max. It operates from a single supply of 2.3 V to 3.6 V and offers break-before-make switching action.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Ultra-low propagation delay of 225 ps for high-speed data routing
• Selectable voltage level translation between 3.3 V, 2.5 V, and 1.8 V domains
• Break-before-make switching prevents momentary shorting during channel transitions
• Compact 8-lead SOT-23 package suitable for space-constrained designs

Analog Switches, Multiplexers, Demultiplexers Applications

• Voltage translation between 3.3 V and 1.8 V logic interfaces
• Memory bank switching to reduce capacitive loading and noise
• Docking station signal routing and bus isolation
• High-speed digital bus interconnects requiring minimal skew

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific ordering suffix (R, REEL, or REEL7) against the required tape and reel quantity configuration. Confirm that the B version temperature range of –40°C to +85°C meets the operational environment requirements. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS input structure.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when bidirectional level translation is required alongside low insertion loss. The SEL pin allows dynamic adjustment of output clamping voltages, making it suitable for mixed-voltage systems. Consider the 4.5 Ω typical on-resistance for signal integrity analysis in high-current applications. The SOT-23 package limits thermal dissipation compared to larger footprints.

Analog Switches, Multiplexers, Demultiplexers Part Context

The ADG3249 belongs to Analog Devices' family of high-speed bus switches and multiplexers. It complements other devices like the ADG3243 by offering a 2:1 mux topology rather than a simple pass gate. This specific part is optimized for applications needing both signal switching and active voltage level translation within a minimal footprint.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Publicly confirmed substitutes include the ADG3243BRJ-REEL, which shares similar voltage levels but lacks the 2:1 multiplexer functionality. Designers must verify pin compatibility and ensure the replacement supports the required break-before-make timing characteristics for the specific application.