DG509ACWE Equivalent & Substitute Parts

Part Overview

The DG509ACWE is a dual-channel SP4T (single-pole, four-throw) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated. This component integrates two independent 4:1 multiplexer/demultiplexer circuits with 450Ohm on-state resistance in a 16-SOIC surface-mount package. The DG509ACWE is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

DG509ACWE

Analog Devices Inc./Maxim IntegratedIn Stock: 1832DG509ACWE Datasheet

Current PartRFQ

DG509ACWE+

Analog Devices Inc./Maxim IntegratedIn Stock: 1011DG509ACWE+ Datasheet

DirectRFQ

MPC509AU

Texas InstrumentsIn Stock: 6166MPC509AU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DG509ACWE is determined by the following critical parameters:

• Switch Circuit & Multiplexer Configuration: Must be SP4T with 4:1 multiplexer/demultiplexer topology and dual-channel architecture
• Package Compatibility: Must use 16-SOIC surface-mount package with identical pinout
• On-State Resistance: Maximum 450Ohm on-state resistance to maintain signal integrity in the target application
• Supply Voltage Range: Must support ±4.5V ~ 18V dual supply operation
• Channel Capacitance: Must match or be lower than 5pF (CS(off)) and 12pF (CD(off)) to preserve bandwidth characteristics
• Leakage Current: Must not exceed 1nA maximum off-state leakage

Two substitute parts meet these criteria:

1. DG509ACWE+ (Direct Manufacturer Upgrade): Identical electrical specifications with improved RoHS3 compliance and active product status
2. MPC509AU (Cross-Manufacturer Alternative): Functionally equivalent SP4T 4:1 dual-channel switch with different on-state resistance and performance characteristics

Parameter Comparison

Engineering Selection Recommendations

DG509ACWE+ (Direct Manufacturer Upgrade)

The DG509ACWE+ is the primary substitute for the obsolete DG509ACWE. This part maintains identical electrical specifications, including on-state resistance, channel capacitance, and supply voltage range. The DG509ACWE+ carries active product status and ROHS3 compliance, making it suitable for new designs and production transitions. The MSL rating of 1 (Unlimited) provides superior moisture handling compared to alternatives. Direct pinout compatibility and matching performance characteristics eliminate design re-qualification requirements.

MPC509AU (Cross-Manufacturer Alternative)

The MPC509AU from Texas Instruments provides a functionally equivalent SP4T 4:1 dual-channel switch architecture with identical package footprint. This part is suitable when supply chain constraints limit DG509ACWE+ availability. Key differences include higher on-state resistance (1.5kOhm versus 450Ohm), faster switch times (200ns/250ns typical versus 1.5µs/1µs maximum), and extended operating temperature range (-40°C ~ 85°C). The MPC509AU is ROHS3 compliant and carries active product status. Applications requiring the lower on-state resistance of the original DG509ACWE may require circuit re-evaluation with the MPC509AU due to its higher resistance specification.

Frequently Asked Questions (FAQ)

Q: Can DG509ACWE+ be used as a direct replacement for DG509ACWE without circuit modification?

A: Yes. The DG509ACWE+ maintains identical electrical specifications, including on-state resistance (450Ohm), supply voltage range (±4.5V ~ 18V), switch timing, and channel capacitance. Pinout compatibility is preserved. No circuit modification is required.

Q: What are the key differences between DG509ACWE+ and MPC509AU?

A: The primary difference is on-state resistance: DG509ACWE+ specifies 450Ohm maximum, while MPC509AU specifies 1.5kOhm maximum. MPC509AU offers faster switch times (200ns/250ns typical) and extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C). Both maintain identical package footprint and 4:1 dual-channel SP4T configuration.

Q: Is the MPC509AU suitable for applications originally designed for DG509ACWE?

A: The MPC509AU is functionally equivalent in topology and package. However, the 3.3x higher on-state resistance (1.5kOhm versus 450Ohm) may affect signal attenuation and impedance matching in the application circuit. Circuit re-evaluation is necessary to confirm compatibility with the higher resistance specification.

Q: What is the significance of the MSL rating difference between DG509ACWE+ and MPC509AU?

A: DG509ACWE+ carries MSL 1 (Unlimited moisture sensitivity), indicating no moisture-related storage restrictions. MPC509AU carries MSL 2 (1 Year), requiring controlled storage conditions and bake-out procedures before reflow soldering if storage exceeds one year. For high-volume production with extended inventory holding, DG509ACWE+ provides superior moisture handling.

Q: Are both substitute parts RoHS3 compliant?

A: Yes. Both DG509ACWE+ and MPC509AU are ROHS3 compliant. The original DG509ACWE is RoHS non-compliant, making either substitute necessary for applications requiring RoHS compliance.

Q: Can these parts be used interchangeably in the same PCB assembly?

A: DG509ACWE and DG509ACWE+ are fully interchangeable due to identical specifications and pinout. MPC509AU shares the same 16-SOIC package footprint and pinout but requires circuit evaluation due to the higher on-state resistance specification before confirming interchangeability in a specific application.