DG407DW Equivalent & Substitute Parts

Part Overview

The DG407DW is a dual 8:1 multiplexer/demultiplexer IC manufactured by Vishay Siliconix, housed in a 28-SOIC surface mount package. This interface component features 100Ohm on-state resistance and operates across a wide supply voltage range (7.5V to 44V single supply, or ±5V to ±20V dual supply). The DG407DW is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support.

Key Parameters

Parameter	Value
Multiplexer/Demultiplexer Circuit Configuration	8:1
Number of Circuits	2
On-State Resistance (Max)	100Ohm
Channel-to-Channel Matching (ΔRon)	5Ohm
Voltage - Supply, Single (V+)	7.5V ~ 44V
Voltage - Supply, Dual (V±)	±5V ~ 20V
Switch Time (Ton, Toff) (Max)	200ns, 150ns
Charge Injection	15pC
Channel Capacitance (CS(off), CD(off))	8pF, 65pF
Current - Leakage (IS(off)) (Max)	500pA
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	28-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the DG407DW is determined by strict electrical and mechanical compatibility across the following critical parameters:

Primary Substitution Criteria:

Multiplexer/Demultiplexer circuit configuration: 8:1 (mandatory)
Number of circuits: 2 (mandatory)
On-state resistance: 100Ohm maximum (mandatory for direct substitution)
Package type: 28-SOIC surface mount (mandatory)
Operating temperature range: -40°C to 85°C minimum (mandatory)
Supply voltage compatibility: Dual supply ±5V to ±20V (mandatory)

Secondary Compatibility Factors:

Channel-to-Channel Matching (ΔRon): 5Ohm or better
Switch timing: 200ns Ton, 150ns Toff or faster
Charge injection: 15pC or lower
Channel capacitance: 8pF source, 65pF drain or lower
Leakage current: 500pA maximum

Substitute parts are grouped into two categories: direct electrical equivalents (matching 100Ohm on-state resistance) and functional alternatives (higher on-state resistance suitable for applications with relaxed impedance requirements).

Parameter Comparison

Part Number	Manufacturer	Product Status	On-State Resistance (Max)	ΔRon (Max)	V+ Supply	V± Supply	Ton/Toff (Max)	Charge Injection	CS(off)/CD(off)	IS(off) (Max)	Temp Range	Package	RoHS Status
DG407DW	Vishay Siliconix	Obsolete	100Ohm	5Ohm	7.5V ~ 44V	±5V ~ 20V	200ns, 150ns	15pC	8pF, 65pF	500pA	-40°C ~ 85°C	28-SOIC	Non-compliant
DG407DW-E3	Vishay Siliconix	Active	100Ohm	5Ohm	7.5V ~ 44V	±5V ~ 20V	200ns, 150ns	15pC	8pF, 65pF	500pA	-40°C ~ 85°C	28-SOIC	ROHS3 Compliant
DG407CWI+	Analog Devices Inc./Maxim Integrated	Active	100Ohm	1.5Ohm	5V ~ 30V	±4.5V ~ 20V	200ns, 150ns	2pC	8pF, 65pF	500pA	0°C ~ 70°C	28-SOIC	ROHS3 Compliant
DG407CWI+T	Analog Devices Inc./Maxim Integrated	Active	100Ohm	1.5Ohm	5V ~ 30V	±4.5V ~ 20V	200ns, 150ns	2pC	8pF, 65pF	500pA	0°C ~ 70°C	28-SOIC	ROHS3 Compliant
DG407EWI+	Analog Devices Inc./Maxim Integrated	Active	100Ohm	1.5Ohm	5V ~ 30V	±4.5V ~ 20V	200ns, 150ns	2pC	8pF, 65pF	500pA	-40°C ~ 85°C	28-SOIC	ROHS3 Compliant
DG407EWI+T	Analog Devices Inc./Maxim Integrated	Active	100Ohm	1.5Ohm	5V ~ 30V	±4.5V ~ 20V	200ns, 150ns	2pC	8pF, 65pF	500pA	-40°C ~ 85°C	28-SOIC	ROHS3 Compliant
DG407DYZ	Renesas Electronics Corporation	Active	100Ohm	5Ohm	5V ~ 34V	±5V ~ 20V	200ns, 150ns	40pC	8pF, 80pF	500pA	-40°C ~ 85°C	28-SOIC	ROHS3 Compliant
DG407DYZ-T	Renesas Electronics Corporation	Active	100Ohm	5Ohm	5V ~ 34V	±5V ~ 20V	200ns, 150ns	40pC	8pF, 80pF	500pA	-40°C ~ 85°C	28-SOIC	ROHS3 Compliant
MPC507AU	Texas Instruments	Active	1.5kOhm	—	—	±5V ~ 22V	200ns, 250ns (Typ)	—	5pF, 25pF	500pA (Typ)	-40°C ~ 85°C	28-SOIC	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Preferred):

DG407DW-E3 is the direct successor from Vishay Siliconix. It maintains identical electrical specifications and package configuration while achieving ROHS3 compliance. This part is recommended as the primary replacement for obsolete DG407DW units in new designs and production restocking.

Tier 2 - Electrical Equivalents with Enhanced Performance:

DG407EWI+ and DG407EWI+T (Analog Devices Inc./Maxim Integrated) provide superior electrical characteristics: reduced channel-to-channel matching (1.5Ohm vs. 5Ohm), lower charge injection (2pC vs. 15pC), and improved crosstalk performance (-92dB @ 100kHz). Both are ROHS3 compliant and active products. DG407EWI+ operates across the full -40°C to 85°C temperature range. DG407CWI+ and DG407CWI+T offer identical electrical performance but operate within a narrower temperature range (0°C to 70°C), suitable for commercial-grade applications only.

Tier 3 - Functional Equivalents:

DG407DYZ and DG407DYZ-T (Renesas Electronics Corporation) maintain 100Ohm on-state resistance and full temperature range operation (-40°C to 85°C). These parts exhibit higher charge injection (40pC vs. 15pC) and increased drain capacitance (80pF vs. 65pF), making them suitable for applications with relaxed analog signal integrity requirements. Both are ROHS3 compliant and active.

Alternative for High-Impedance Applications:

MPC507AU (Texas Instruments) features 1.5kOhm on-state resistance and is suitable only for applications where higher channel impedance is acceptable. This part is not a direct substitute for the DG407DW but serves as a functional alternative in specific circuit topologies. It is ROHS3 compliant and active.

Frequently Asked Questions (FAQ)

Q: Can DG407DW-E3 be used as a direct drop-in replacement for DG407DW?

A: Yes. DG407DW-E3 maintains identical electrical specifications, package configuration (28-SOIC), and pin assignment. The primary difference is ROHS3 compliance status. No circuit modifications are required.

Q: What is the key difference between DG407EWI+ and DG407DW?

A: DG407EWI+ provides superior performance with lower channel-to-channel matching (1.5Ohm vs. 5Ohm), significantly reduced charge injection (2pC vs. 15pC), and documented crosstalk performance (-92dB @ 100kHz). On-state resistance remains 100Ohm. The supply voltage range is narrower (5V to 30V single supply vs. 7.5V to 44V), which may limit applicability in high-voltage circuits.

Q: Is MPC507AU compatible with DG407DW circuits?

A: MPC507AU is not a direct substitute. Its 1.5kOhm on-state resistance is 15 times higher than the DG407DW's 100Ohm specification. Use MPC507AU only in applications where higher channel impedance is acceptable and circuit design has been verified for this parameter change.

Q: What packaging options are available for DG407 equivalents?

A: All substitute parts are available in 28-SOIC surface mount package. Packaging variants include Tube (standard) and Tape & Reel (TR) for automated assembly. DG407DW-E3, DG407DYZ, and DG407CWI+ are available in Tube packaging. DG407DYZ-T, DG407CWI+T, and DG407EWI+T are supplied in Tape & Reel format.

Q: Which substitute part is recommended for extended temperature range applications?

A: DG407EWI+, DG407EWI+T, DG407DYZ, and DG407DYZ-T all support the full -40°C to 85°C operating range. DG407CWI+ and DG407CWI+T are limited to 0°C to 70°C and are unsuitable for industrial or military temperature specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All active substitute parts listed (DG407DW-E3, DG407CWI+, DG407CWI+T, DG407EWI+, DG407EWI+T, DG407DYZ, DG407DYZ-T, and MPC507AU) are ROHS3 compliant. The original DG407DW is RoHS non-compliant.

Q: What is the significance of charge injection in multiplexer selection?

A: Charge injection affects analog signal accuracy. Lower charge injection (2pC for DG407EWI+ vs. 15pC for DG407DW) results in reduced signal distortion when switching analog signals. Applications requiring high-precision analog multiplexing benefit from parts with lower charge injection specifications.

Q: Can DG407DYZ be used in place of DG407DW in all applications?

A: DG407DYZ is electrically compatible for most applications but exhibits higher charge injection (40pC vs. 15pC) and increased drain capacitance (80pF vs. 65pF). Applications with stringent analog signal integrity requirements may experience performance degradation. Electrical simulation or bench testing is recommended for critical analog applications.

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