DG408DY Equivalent & Substitute Parts

Part Overview

The DG408DY is an 8:1 multiplexer/demultiplexer IC manufactured by Analog Devices Inc./Maxim Integrated, housed in a 16-SOIC surface mount package. This component functions as a single-circuit analog switch with 100Ohm on-state resistance, designed for signal routing and selection applications across industrial and commercial systems.

The DG408DY carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support long-term production requirements for systems utilizing this interface component.

Substiute Parts

DG408DY

Analog Devices Inc./Maxim IntegratedIn Stock: 15493DG408DY Datasheet

Current PartRFQ

DG408DY+

Analog Devices Inc./Maxim IntegratedIn Stock: 5847DG408DY+ Datasheet

DirectRFQ

DG408DY-E3

Vishay SiliconixIn Stock: 5905DG408DY-E3 Datasheet

MFR RecommendedRFQ

DG408DY-T1-E3

Vishay SiliconixIn Stock: 20217DG408DY-T1-E3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DG408DY is determined by the following critical parameters:

Functional Equivalence: 8:1 multiplexer/demultiplexer configuration with single circuit topology and 100Ohm on-state resistance.

Electrical Performance: Supply voltage ranges, switch timing (150ns maximum), leakage current (500pA maximum), and operating temperature range (-40°C to 85°C).

Physical Compatibility: 16-SOIC surface mount package with identical footprint dimensions (0.154", 3.90mm width).

Packaging Format: Tube, Cut Tape (CT), Digi-Reel®, or Tape & Reel (TR) configurations are acceptable for substitution.

Substitute parts must maintain electrical performance within the specified parameters. Variations in channel-to-channel matching (ΔRon), charge injection, and crosstalk specifications are permitted when the substitute part meets or exceeds the functional requirements of the original design.

Parameter Comparison

Engineering Selection Recommendations

DG408DY+ (Analog Devices Inc./Maxim Integrated): This part is the direct successor to the DG408DY, maintaining identical electrical specifications including channel-to-channel matching (1.5Ohm) and charge injection (2pC). The DG408DY+ carries active product status and ROHS3 compliance, making it the preferred choice for new designs and production continuity. Packaging is available in Tube format.

DG408DY-E3 (Vishay Siliconix): This substitute maintains core functional equivalence with 8:1 multiplexer configuration and 100Ohm on-state resistance. The part features extended single supply voltage range (5V ~ 36V) and active product status with ROHS3 compliance. Channel-to-channel matching tolerance is relaxed to 15Ohm maximum, and charge injection increases to 20pC. This part is suitable for applications where the relaxed matching specification does not impact circuit performance. Packaging is available in Tube format.

DG408DY-T1-E3 (Vishay Siliconix): Electrically identical to DG408DY-E3 with the same performance characteristics and relaxed matching specification. This part is differentiated by packaging availability in Cut Tape (CT) and Digi-Reel® formats, supporting high-volume automated assembly operations. Active product status and ROHS3 compliance are maintained.

Selection between substitute parts should be based on packaging requirements, supply chain availability, and tolerance specifications acceptable to the application circuit.

Frequently Asked Questions (FAQ)

Q: Can DG408DY+ be used as a direct replacement for DG408DY?

A: Yes. DG408DY+ maintains identical electrical specifications including on-state resistance, channel-to-channel matching, charge injection, and operating temperature range. The 16-SOIC package footprint is identical. DG408DY+ is the recommended substitute for design continuity.

Q: What is the difference between DG408DY-E3 and DG408DY-T1-E3?

A: Both parts are electrically identical. The primary difference is packaging format: DG408DY-E3 is supplied in Tube format, while DG408DY-T1-E3 is supplied in Cut Tape (CT) and Digi-Reel® formats. Selection depends on assembly process requirements and volume handling.

Q: Are the Vishay Siliconix substitutes (DG408DY-E3, DG408DY-T1-E3) fully compatible with DG408DY?

A: Both Vishay parts maintain functional equivalence in 8:1 multiplexer configuration, 100Ohm on-state resistance, 150ns switch timing, and operating temperature range. Channel-to-channel matching tolerance is relaxed from 1.5Ohm to 15Ohm maximum, and charge injection increases from 2pC to 20pC. These differences are acceptable for most applications; however, circuits requiring tight matching specifications should use DG408DY+ instead.

Q: What is the impact of increased charge injection in Vishay substitutes?

A: Charge injection increases from 2pC (DG408DY, DG408DY+) to 20pC (DG408DY-E3, DG408DY-T1-E3). This parameter affects signal accuracy in precision analog switching applications. Applications with stringent charge injection requirements should use DG408DY+.

Q: Are all substitute parts RoHS compliant?

A: DG408DY is RoHS non-compliant. All substitute parts (DG408DY+, DG408DY-E3, DG408DY-T1-E3) are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: Can I mix packaging formats in production?

A: Yes. All substitute parts are electrically and mechanically identical within their respective electrical specification groups. Packaging format selection (Tube, Cut Tape, Digi-Reel®, Tape & Reel) depends on assembly equipment and handling requirements and does not affect electrical performance.

Q: What supply voltage range should I use for Vishay substitutes?

A: Vishay parts (DG408DY-E3, DG408DY-T1-E3) support extended single supply voltage range of 5V ~ 36V, compared to 5V ~ 30V for DG408DY and DG408DY+. Dual supply range remains ±5V ~ 20V across all parts. Design circuits to the most restrictive specification (5V ~ 30V) for compatibility across all substitutes.