MAX4547CEE+

Analog Switches - Special Purpose Overview

The MAX4547CEE+ is a dual single-pole/double-throw (SPDT) low-voltage CMOS analog switch designed for RF and video signal routing. It operates with dual supplies from ±2.7V to ±6V or a single supply between +2.7V and +12V. The device features a T-switch architecture providing -80dB off isolation and crosstalk at 10MHz, with a -3dB bandwidth of 300MHz. On-resistance is typically 14Ω (max 20Ω) with ±5V supplies, matched to 1Ω max and flat to 0.5Ω max. Leakage current is <5nA at +25°C. Logic inputs are TTL/CMOS compatible with thresholds of 0.8V/2.4V.

Analog Switches - Special Purpose Feature Summary

• Dual SPDT configuration with T-switch construction for high-frequency performance
• Rail-to-rail analog signal handling capability in bidirectional paths
• TTL and CMOS logic input compatibility across standard supply voltages
• Low power consumption with minimal supply current draw

Analog Switches - Special Purpose Applications

• RF switching systems
• Video signal routing and multiplexing
• High-speed data acquisition front ends
• Automated test equipment signal paths
• Networking interface protection

Analog Switches - Special Purpose Procurement Notes

Verify the suffix 'CEE+' indicates the lead-free RoHS-compliant variant within the MAX4547 family. Confirm the package type corresponds to the specific pinout requirements of your design, as the datasheet lists multiple package options including QSOP and SSOP for this model number series. Ensure temperature range matches the 'C' designation for commercial operation.

Analog Switches - Special Purpose Selection Notes

Select the MAX4547 when dual SPDT switching functionality is required rather than the quad SPST (MAX4545) or mixed NO/NC (MAX4546) configurations. Consider the on-resistance flatness and matching specifications if signal linearity is critical. Verify that the system impedance aligns with the 50Ω or 75Ω optimization points for optimal insertion loss and isolation performance.

Analog Switches - Special Purpose Part Context

This component belongs to the MAX4545/MAX4546/MAX4547 family of low-voltage, bidirectional RF/video switches manufactured by Analog Devices Inc./Maxim Integrated. The family shares identical core T-switch technology and electrical characteristics, differing primarily in the number and type of internal switches provided per package.

Analog Switches - Special Purpose Replacement Considerations

Public confirmed substitutes include other Maxim Integrated SPDT CMOS switches such as the MAX4546 or MAX4545 if pinout flexibility allows. Cross-reference with Analog Devices' current portfolio for equivalent low-voltage RF switches, ensuring voltage ranges and isolation specs meet or exceed the original requirements.

Analog Switches - Special Purpose FAQ

How does the MAX4547 handle signals exceeding the supply rails?

Internal ESD protection diodes clamp any pin voltage exceeding V+ or V- by approximately 0.3V. Exceeding these limits can cause diode conduction and potential damage if current is not limited.

What is the impact of using a single supply instead of dual supplies?

Single-supply operation degrades AC and DC characteristics, including increased on-resistance, slower switching times, reduced off-isolation, and higher distortion compared to the optimized ±5V dual-supply operation.

Why are separate GND pins provided for each switch section?

Separate GND pins are not internally connected to improve high-frequency isolation and crosstalk performance. They allow flexible grounding strategies but must be connected to a solid ground plane for optimal RF operation.