DG428DN Equivalent & Substitute Parts

Part Overview

The DG428DN is an 8:1 analog multiplexer/demultiplexer IC manufactured by Vishay Siliconix, designed for signal routing applications in interface circuits. This device features a single 8:1 switching circuit with 100Ohm on-state resistance in a 20-PLCC surface mount package. The DG428DN is classified as obsolete, which necessitates identification of equivalent and substitute parts for new designs and ongoing production requirements. Active alternatives from both Vishay Siliconix and Analog Devices Inc. are available to maintain design continuity and ensure component availability.

Key Parameters

Parameter	Value
Multiplexer/Demultiplexer Circuit Configuration	8:1
Number of Circuits	1
On-State Resistance (Max)	100Ohm
Voltage - Supply, Single (V+)	12V
Voltage - Supply, Dual (V±)	±15V
Switch Time (Ton, Toff) (Max)	150ns, 150ns
Charge Injection	1pC
Channel Capacitance (CS(off), CD(off))	11pF, 40pF
Current - Leakage (IS(off)) (Max)	500pA
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-LCC (J-Lead)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the DG428DN is determined by strict equivalence across the following critical parameters:

Multiplexer/Demultiplexer circuit configuration: 8:1
Number of circuits: 1
On-state resistance: 100Ohm maximum
Supply voltage compatibility: 12V single supply and ±15V dual supply
Switch timing: 150ns maximum for both Ton and Toff
Package type: 20-PLCC (9x9) surface mount
Operating temperature range: -40°C to 85°C

Substitute parts must maintain identical or superior electrical performance within these parameters. Packaging format (tube, tape & reel) represents a logistical variation only and does not affect electrical compatibility. RoHS compliance status and product lifecycle status (active vs. obsolete) are secondary considerations for component selection but are documented for procurement and regulatory purposes.

Parameter Comparison

Parameter	DG428DN (Vishay)	DG428DN-E3 (Vishay)	ADG428BPZ (Analog Devices)	ADG428BPZ-REEL (Analog Devices)
Manufacturer	Vishay Siliconix	Vishay Siliconix	Analog Devices Inc.	Analog Devices Inc.
Product Status	Obsolete	Active	Active	Active
Multiplexer Configuration	8:1	8:1	8:1	8:1
On-State Resistance (Max)	100Ohm	100Ohm	100Ohm	100Ohm
Channel-to-Channel Matching (ΔRon)	5Ohm	5Ohm	10Ohm	10Ohm
Voltage - Supply, Single (V+)	12V	12V	12V	12V
Voltage - Supply, Dual (V±)	±15V	±15V	±15V	±15V
Switch Time (Ton, Toff) (Max)	150ns, 150ns	150ns, 150ns	150ns, 150ns	150ns, 150ns
Charge Injection	1pC	1pC	4pC	4pC
Channel Capacitance (CS(off), CD(off))	11pF, 40pF	11pF, 40pF	11pF, 40pF	11pF, 40pF
Current - Leakage (IS(off)) (Max)	500pA	500pA	500pA	500pA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	20-LCC (J-Lead)	20-LCC (J-Lead)	20-LCC (J-Lead)	20-LCC (J-Lead)
Packaging Format	Standard	Tube	Tube	Tape & Reel (TR)
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All four parts listed maintain functional equivalence for 8:1 multiplexing applications with identical supply voltage requirements and switching performance. Selection between these alternatives is determined by product lifecycle and regulatory compliance requirements:

DG428DN-E3 represents the direct Vishay Siliconix equivalent with active product status and ROHS3 compliance. This part maintains identical electrical specifications to the obsolete DG428DN, including superior channel-to-channel matching (5Ohm vs. 10Ohm) and lower charge injection (1pC vs. 4pC). The DG428DN-E3 is the preferred substitution path for designs currently using the DG428DN.

ADG428BPZ and ADG428BPZ-REEL are Analog Devices Inc. alternatives with active product status and ROHS3 compliance. These parts exhibit slightly relaxed channel-to-channel matching (10Ohm) and increased charge injection (4pC) compared to the Vishay variants, but maintain all critical switching parameters and supply voltage specifications. The ADG428BPZ-REEL variant is supplied in tape & reel format for high-volume automated assembly, while ADG428BPZ is supplied in tube format for lower-volume applications.

For new designs and production requiring RoHS3 compliance, DG428DN-E3, ADG428BPZ, or ADG428BPZ-REEL are all acceptable selections. For legacy designs currently using the obsolete DG428DN without RoHS compliance requirements, DG428DN-E3 provides the most direct electrical replacement.

Frequently Asked Questions (FAQ)

Q: Can the DG428DN-E3 be used as a direct replacement for the DG428DN?

A: Yes. The DG428DN-E3 maintains identical electrical specifications for all critical parameters including on-state resistance, supply voltage, switching time, and operating temperature range. The primary difference is product status (active vs. obsolete) and RoHS3 compliance. Both parts use the same 20-PLCC package and are pin-compatible.

Q: What are the differences between the Vishay DG428DN-E3 and the Analog Devices ADG428BPZ?

A: Both parts are functionally equivalent 8:1 multiplexers with identical on-state resistance, supply voltage, and switching time specifications. The DG428DN-E3 offers superior channel-to-channel matching (5Ohm vs. 10Ohm) and lower charge injection (1pC vs. 4pC). The ADG428BPZ is an alternative from a different manufacturer with equivalent core functionality. Selection between these parts is based on supplier availability, procurement preference, and the specific application's tolerance for charge injection and matching characteristics.

Q: What is the difference between ADG428BPZ and ADG428BPZ-REEL?

A: These parts are electrically identical. The difference is packaging format only. ADG428BPZ is supplied in tube format for manual or lower-volume pick-and-place assembly. ADG428BPZ-REEL is supplied in tape & reel format optimized for high-speed automated assembly lines. Selection depends on production volume and assembly equipment capabilities.

Q: Are all substitute parts RoHS3 compliant?

A: The DG428DN-E3, ADG428BPZ, and ADG428BPZ-REEL are all ROHS3 compliant. The original DG428DN is RoHS non-compliant. For applications requiring RoHS3 compliance, any of the three active alternatives are acceptable.

Q: Can I use these parts interchangeably in my existing design?

A: Yes, provided your design accommodates the electrical parameter variations documented in the parameter comparison table. The primary consideration is charge injection: the Analog Devices variants (ADG428BPZ, ADG428BPZ-REEL) exhibit 4pC charge injection compared to 1pC for the Vishay variants. In applications sensitive to charge injection effects, the Vishay DG428DN-E3 is the preferred selection. All parts share identical package geometry and pin configuration.

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