DG508AEWE+ Equivalent & Substitute Parts

Part Overview

The DG508AEWE+ is an 8:1 analog multiplexer/demultiplexer IC manufactured by Analog Devices Inc./Maxim Integrated, designed for signal routing and switching applications in analog circuits. This surface-mount component operates with dual supply voltages (±4.5V to ±18V) and features a maximum on-state resistance of 450Ω, making it suitable for precision signal conditioning and data acquisition systems. The part is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified when they maintain functional compatibility across the 8:1 multiplexer topology, package form factor (16-SOIC), and operating temperature range while meeting the electrical parameter requirements of the application.

Substiute Parts

DG508AEWE+

Analog Devices Inc./Maxim IntegratedIn Stock: 1090DG508AEWE+ Datasheet

Current PartRFQ

DG508AEWE+

Analog Devices Inc./Maxim IntegratedIn Stock: 1090DG508AEWE+ Datasheet

DirectRFQ

MPC508AU

Texas InstrumentsIn Stock: 3835MPC508AU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DG508AEWE+ is determined by strict adherence to the following criteria:

Primary Substitution Criteria:

• Multiplexer/Demultiplexer topology: 8:1 configuration
• Single circuit count: 1
• Package form factor: 16-SOIC surface mount
• Operating temperature range: -40°C to 85°C (TA)
• Dual supply voltage compatibility: ±4.5V minimum to ±18V maximum

Secondary Electrical Parameters:

• On-state resistance specifications must not exceed application requirements
• Channel capacitance values (CS(off), CD(off)) must remain within acceptable limits for signal integrity
• Leakage current specifications must support application precision requirements
• Switch timing characteristics must meet application bandwidth and settling time requirements

The MPC508AU from Texas Instruments qualifies as a manufacturer-recommended substitute based on identical 8:1 multiplexer topology, 16-SOIC package, and overlapping operating temperature range. However, electrical parameter differences exist and must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

DG508AEWE+ (Primary Selection): The DG508AEWE+ remains the primary component choice when the application requires the specified 450Ω on-state resistance and 27Ω channel-to-channel matching. This part carries active product status, ROHS3 compliance, and MSL 1 rating, indicating superior moisture handling characteristics and unlimited shelf life under standard storage conditions. Current inventory availability is 1003 units.

MPC508AU (Manufacturer-Recommended Substitute): The MPC508AU qualifies as a manufacturer-recommended substitute when application requirements permit higher on-state resistance (1.5kΩ maximum) and faster switching characteristics are beneficial. This part maintains identical 8:1 topology, 16-SOIC package, and -40°C to 85°C operating range. The MPC508AU features faster switch times (200ns/250ns typical versus 1.5µs/1µs maximum) and lower typical leakage current (500pA typical). However, the MSL 2 rating requires 1-year shelf life management. Current inventory availability is 3743 units. Substitution is valid only when circuit design accommodates the higher on-state resistance specification.

Compliance Considerations: Both parts maintain ROHS3 compliance and EAR99 export classification. Selection between these parts should prioritize application electrical requirements over inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the MPC508AU directly replace the DG508AEWE+ in all applications?

A: Direct replacement is valid only when the application circuit design accommodates the MPC508AU's higher on-state resistance (1.5kΩ versus 450Ω). The 3.3× increase in on-state resistance will affect signal attenuation, impedance matching, and settling time characteristics. Applications requiring the specified 450Ω resistance or 27Ω channel matching must use the DG508AEWE+.

Q: What are the key electrical differences between these parts?

A: The primary differences are on-state resistance (450Ω versus 1.5kΩ), switch timing (1.5µs/1µs maximum versus 200ns/250ns typical), and leakage current specifications (1nA maximum versus 500pA typical). Channel capacitance values are identical (5pF, 25pF). Supply voltage ranges overlap but differ slightly (±4.5V–±18V versus ±5V–±22V).

Q: Are the package dimensions identical?

A: Yes. Both parts use 16-SOIC surface-mount packaging with identical dimensions (0.295" width, 7.50mm). PCB layout and footprints are interchangeable.

Q: What is the significance of the MSL rating difference?

A: The DG508AEWE+ carries MSL 1 (unlimited shelf life), while the MPC508AU carries MSL 2 (1-year shelf life). MSL 2 components require controlled storage conditions and have a defined floor life. For applications with extended component storage or inventory management requirements, the DG508AEWE+ offers superior handling flexibility.

Q: Can I use the MPC508AU if my application requires faster switching?

A: The MPC508AU's faster switching characteristics (200ns/250ns typical) may benefit applications requiring higher bandwidth. However, substitution must still satisfy the on-state resistance requirement. If the application can tolerate 1.5kΩ on-state resistance, the faster switching of the MPC508AU is available as a secondary benefit.

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes. No compliance advantage exists between the two parts.