PS508LEX

Overview

The PS508LEX is a CMOS analog multiplexer manufactured by Diodes Incorporated, featuring eight single-ended channels in a 16-pin TSSOP package. It supports dual supplies from ±5V to ±18V or a single supply from 10V to 36V. Key electrical parameters include a maximum on-resistance of 200Ω at ±15V and 430Ω at +12V, with an input leakage current of 1nA. The device operates within a temperature range of -40°C to +125°C, drawing 135µA typical supply current. It provides rail-to-rail signal handling, 2000V HBM ESD protection, and break-before-make switching action.

Feature Summary

• Rail-to-rail operation compatible with symmetric and asymmetric power supplies
• Break-before-make switching action prevents signal overlap during channel transitions
• TTL and CMOS logic compatibility for digital control inputs
• Low charge injection and off-leakage currents ensure minimal signal distortion

Applications

• Factory automation and industrial process controls
• Programmable Logic Controllers (PLC)
• Analog input modules
• ATE test equipment
• Digital multimeters

Procurement Notes

Verify the specific ordering code suffix against official documentation to confirm packaging details. The 'L' designation indicates a 16-pin TSSOP package, while the 'X' suffix specifies tape and reel delivery. Confirm RoHS compliance and lead-free status requirements prior to procurement to ensure alignment with manufacturing standards.

Selection Notes

Select the PS508LEX when eight single-ended analog channels require switching within a wide voltage range. This component is suitable for applications demanding low on-resistance and high isolation. Ensure the system voltage falls between 10V and 36V for single-supply configurations or ±5V to ±18V for dual-supply setups to maintain optimal performance.

Part Context

The PS508LEX belongs to the PS508/PS509 family of precision analog multiplexers produced by Diodes Incorporated. While the PS508 variant provides eight single-ended channels, the PS509 offers differential or dual single-ended configurations. Both share identical pinouts and operational characteristics, differing primarily in internal channel architecture.

Replacement Considerations

Direct functional equivalents within the same series include the PS508QEX (QSOP package) and PS508WEX (SOIC package). These parts share identical electrical specifications and pin assignments, allowing for potential board-level substitution if package footprint constraints permit.

FAQ

Can the PS508LEX operate with unsymmetric power supplies?

Yes, the device supports unsymmetric supply configurations, such as VDD = 12V and VSS = –5V, provided the total supply voltage remains within the specified limits.

What is the maximum ESD protection rating for this component?

The PS508LEX features electrostatic discharge protection rated at 2000V according to the Human-Body Model (HBM) standard.

How does the enable pin function affect the switch state?

The EN pin is active-high; when driven low, all switches are turned off regardless of address inputs. When high, the A0, A1, and A2 pins determine the active channel.