MUX508ID

Overview

The MUX508ID is a precision analog multiplexer manufactured by Texas Instruments, housed in a 16-pin SOIC package. It provides an 8:1 single-ended switching configuration with one functional circuit. The device operates on a single supply voltage ranging from 10V to 36V or dual supplies of ±5V to ±18V. Key electrical parameters include a maximum on-state resistance (Ron) of 170 ohms and a channel-to-channel matching (ΔRon) of 2.4 ohms. It features low charge injection of 0.3pC and a typical on-state capacitance of 9.4pF. Switching times are characterized by a maximum turn-on time of 136ns and turn-off time of 75ns. The component supports a wide operating temperature range from -40°C to +125°C.

Feature Summary

• Rail-to-rail operation capability across wide power supply ranges
• Low charge injection for minimal signal distortion during switching
• TTL and CMOS logic input compatibility for versatile digital control
• Bidirectional analog channels allowing flexible signal routing

Applications

• Data acquisition systems requiring high-impedance source switching
• Portable instrumentation utilizing VTT discharge capabilities
• Precision measurement circuits demanding low leakage current
• Industrial control systems operating under varying power conditions

Procurement Notes

Verify the specific suffix 'ID' confirms the SOIC-16 narrow package variant when sourcing replacements. Ensure the order quantity aligns with manufacturer minimums if purchasing bulk reels versus cut tape options. Confirm RoHS compliance status matches project requirements, as indicated in official documentation. Cross-reference the datasheet revision date to ensure parameter consistency with existing design specifications.

Selection Notes

Select this component when an 8:1 single-ended multiplexing topology is required within a 16-pin surface-mount footprint. Consider the 170-ohm Ron limit for applications where signal attenuation must be minimized. Evaluate the 9.4pF capacitance against bandwidth requirements to prevent signal integrity issues at higher frequencies. Verify that the ±5V to ±18V dual supply range fits the system's power architecture constraints.

Part Context

This part belongs to the MUX50x family of modern CMOS analog multiplexers. It shares core architectural similarities with the MUX509, which offers differential or dual 4:1 configurations. Both devices utilize the same low-leakage CMOS technology but differ in channel count and switching topology. The MUX508ID specifically addresses applications needing eight single-ended inputs within a compact industrial-grade package.

Replacement Considerations

The MUX508IPWRG4 serves as a pin-compatible alternative in a TSSOP-16 package. Verify thermal performance differences between SOIC and TSSOP footprints before substitution. Ensure the replacement maintains the same 170-ohm Ron specification to preserve circuit accuracy.