MAX4521CUE+

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX4521CUE+ is a quad, low-voltage, single-pole/single-throw (SPST) analog switch manufactured by Analog Devices Inc./Maxim Integrated. It features four normally closed (NC) switches within a 16-pin Thin-Shrink Small Outline Package (TSSOP). The device operates with dual power supplies ranging from ±2V to ±6V or a single supply between +2V and +12V. Key electrical specifications include a maximum on-resistance of 100Ω, an on-resistance flatness of 12Ω max, and channel-to-channel matching of 4Ω max. Off-leakage current is specified at 1nA at +25°C and 10nA at +85°C. The component supports fully rail-to-rail analog signal handling and provides TTL/CMOS logic compatibility.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Quad SPST configuration with four internally matched normally closed analog switches
• Low voltage operation supporting both single (+2V to +12V) and dual (±2V to ±6V) power supplies
• Rail-to-rail analog signal path capability with high off-isolation characteristics
• TTL and CMOS compatible digital input thresholds for direct interface with standard logic families

Analog Switches, Multiplexers, Demultiplexers Applications

• Battery-operated equipment requiring low power consumption
• Data acquisition systems utilizing multiplexed signal paths
• Audio signal routing and switching matrices
• Test and measurement instrumentation
• Avionics control circuits

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the ordering suffix 'C' confirms the commercial temperature range of 0°C to +70°C and the 'U' indicates the TSSOP package. Confirm the '+' suffix denotes compliance with current environmental directives. Cross-reference the manufacturer's latest documentation to ensure the specific batch aligns with the required RoHS status and material declarations before finalizing procurement orders.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when a normally closed analog switching topology is required for low-voltage applications. Ensure the system voltage remains within the +2V to +12V single supply or ±2V to ±6V dual supply limits. Verify that the 100Ω maximum on-resistance meets the signal integrity requirements of the application. Consider the TSSOP package dimensions if board space constraints are critical compared to larger DIP or SOIC alternatives.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the MAX4521/MAX4522/MAX4523 family of quad, low-voltage SPST analog switches. While the MAX4522 offers normally open switches and the MAX4523 provides a mixed NC/NO configuration, the MAX4521 specifically utilizes four normally closed switches. All variants share identical pinouts and electrical characteristics regarding on-resistance and leakage, differing only in the default state of the internal CMOS switches.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Direct functional substitutes within the same package and specification profile include the MAX4521EUE for extended temperature ranges (-40°C to +85°C). Other package variations such as MAX4521CSE (SOIC) or MAX4521CEE (QSOP) offer pin-compatible alternatives if footprint changes are permissible. Verify that any replacement maintains the normally closed configuration and single/dual supply compatibility.