DG333ADW Equivalent & Substitute Parts

Part Overview

The DG333ADW is a 4-circuit SPDT analog switch IC manufactured by Vishay Siliconix, housed in a 20-SOIC surface mount package. This component functions as a 2:1 multiplexer/demultiplexer with 45Ohm on-state resistance, designed for signal routing and switching applications across industrial and commercial systems. The DG333ADW carries an obsolete product status, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SPDT (Single Pole Double Throw)
Number of Circuits	4
Multiplexer/Demultiplexer Circuit	2:1
On-State Resistance (Max)	45Ohm
Channel-to-Channel Matching (ΔRon)	2Ohm (Max)
Voltage - Supply, Single (V+)	5V ~ 40V
Voltage - Supply, Dual (V±)	±4V ~ 22V
Switch Time (Ton, Toff) (Max)	175ns, 145ns
Charge Injection	10pC
Channel Capacitance (CS(off), CD(off))	8pF
Current - Leakage (IS(off)) (Max)	250pA
Crosstalk	-80dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the DG333ADW is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Switch circuit configuration: SPDT with 4 circuits in 2:1 multiplexer/demultiplexer topology
On-state resistance: 45Ohm maximum
Package: 20-SOIC surface mount form factor
Operating temperature range: -40°C to 85°C minimum
Supply voltage compatibility: Single supply 5V ~ 40V or dual supply ±4V ~ 22V

Substitution Categories:

Direct Manufacturer Equivalent: DG333ADW-E3 maintains identical electrical specifications and is manufactured by the same supplier (Vishay Siliconix). This part differs only in packaging format (Tube) and carries Active product status with ROHS3 compliance.

Parametric Equivalent: DG333ALDW-E3 provides identical electrical performance and package specifications, also from Vishay Siliconix, with Active status and ROHS3 compliance.

Cross-Manufacturer Alternatives: ADG333ABRZ and ADG333ABRZ-REEL (Analog Devices Inc.) meet the core switching topology and package requirements. These parts feature improved performance characteristics including faster switch times (90ns/80ns typical versus 175ns/145ns) and lower charge injection (2pC versus 10pC), with supply voltage ranges of 3V ~ 30V single supply and ±3V ~ 20V dual supply.

Functional Alternatives with Parameter Deviations: MAX333ACWP+, MAX333ACWP+T, MAX333AEWP+, and MAX333AEWP+T (Analog Devices Inc./Maxim Integrated) maintain the 45Ohm on-state resistance and 4-circuit SPDT configuration. These parts operate within restricted supply voltage ranges (10V ~ 30V single supply, ±4.5V ~ 20V dual supply) and feature lower channel capacitance (5pF versus 8pF).

Limited Compatibility Alternatives: MAX333CWP+ and MAX333EWP+ feature significantly different on-state resistance (250Ohm versus 45Ohm) and are suitable only for applications where higher resistance is acceptable. These parts are not direct substitutes for the DG333ADW.

Parameter Comparison

Part Number	Manufacturer	Product Status	On-State Resistance (Max)	ΔRon (Max)	V+ Supply	V± Supply	Ton/Toff (Max)	Charge Injection	Channel Capacitance	Operating Temp	RoHS Status	Package
DG333ADW	Vishay Siliconix	Obsolete	45Ohm	2Ohm	5V ~ 40V	±4V ~ 22V	175ns, 145ns	10pC	8pF	-40°C ~ 85°C	Non-compliant	20-SOIC
DG333ADW-E3	Vishay Siliconix	Active	45Ohm	2Ohm	5V ~ 40V	±4V ~ 22V	175ns, 145ns	10pC	8pF	-40°C ~ 85°C	ROHS3 Compliant	20-SOIC
DG333ALDW-E3	Vishay Siliconix	Active	45Ohm	2Ohm	5V ~ 40V	±4V ~ 22V	175ns, 145ns	10pC	8pF	-40°C ~ 85°C	ROHS3 Compliant	20-SOIC
ADG333ABRZ	Analog Devices Inc.	Active	45Ohm	5Ohm	3V ~ 30V	±3V ~ 20V	90ns, 80ns (Typ)	2pC	7pF	-40°C ~ 85°C	ROHS3 Compliant	20-SOIC
ADG333ABRZ-REEL	Analog Devices Inc.	Active	45Ohm	5Ohm	3V ~ 30V	±3V ~ 20V	90ns, 80ns (Typ)	2pC	7pF	-40°C ~ 85°C	ROHS3 Compliant	20-SOIC
MAX333ACWP+	Analog Devices Inc./Maxim Integrated	Active	45Ohm	2Ohm	10V ~ 30V	±4.5V ~ 20V	175ns, 145ns	2pC	5pF	0°C ~ 70°C	ROHS3 Compliant	20-SOIC
MAX333ACWP+T	Analog Devices Inc./Maxim Integrated	Active	45Ohm	2Ohm	10V ~ 30V	±4.5V ~ 20V	175ns, 145ns	2pC	5pF	0°C ~ 70°C	ROHS3 Compliant	20-SOIC
MAX333AEWP+	Analog Devices Inc./Maxim Integrated	Active	45Ohm	2Ohm	10V ~ 30V	±4.5V ~ 20V	175ns, 145ns	2pC	5pF	-40°C ~ 85°C	ROHS3 Compliant	20-SOIC
MAX333AEWP+T	Analog Devices Inc./Maxim Integrated	Active	45Ohm	2Ohm	10V ~ 30V	±4.5V ~ 20V	175ns, 145ns	2pC	5pF	-40°C ~ 85°C	ROHS3 Compliant	20-SOIC
MAX333CWP+	Analog Devices Inc./Maxim Integrated	Active	250Ohm	—	10V ~ 30V	±5V ~ 18V	1µs, 500ns	—	5pF	0°C ~ 70°C	ROHS3 Compliant	20-SOIC
MAX333EWP+	Analog Devices Inc./Maxim Integrated	Active	250Ohm	—	10V ~ 30V	±5V ~ 18V	1µs, 500ns	—	5pF	-40°C ~ 85°C	ROHS3 Compliant	20-SOIC

Engineering Selection Recommendations

For Direct Replacement (Obsolete to Active Transition):

DG333ADW-E3 and DG333ALDW-E3 are the primary substitutes for the obsolete DG333ADW. Both parts are manufactured by Vishay Siliconix and maintain identical electrical specifications. DG333ADW-E3 carries Active product status and ROHS3 compliance, making it the preferred choice for new designs and production continuity. DG333ALDW-E3 provides an equivalent alternative with identical performance characteristics.

For Extended Temperature Range Applications:

MAX333AEWP+ and MAX333AEWP+T maintain the full -40°C to 85°C operating temperature range of the original DG333ADW while offering ROHS3 compliance and Active product status. These parts are suitable for industrial applications requiring extended temperature operation. The +T variant provides Tape & Reel packaging for automated assembly, while the standard variant offers Tube packaging.

For Restricted Supply Voltage Applications:

MAX333ACWP+ and MAX333ACWP+T are suitable only for applications operating within the 10V ~ 30V single supply or ±4.5V ~ 20V dual supply range. These parts feature identical on-state resistance and channel-to-channel matching to the DG333ADW but operate within a narrower voltage window. Operating temperature is limited to 0°C ~ 70°C.

For Performance-Enhanced Applications:

ADG333ABRZ and ADG333ABRZ-REEL (Analog Devices Inc.) offer improved switching performance with faster transition times (90ns/80ns typical) and lower charge injection (2pC), beneficial for high-speed signal routing applications. These parts support supply voltages of 3V ~ 30V single supply and ±3V ~ 20V dual supply. The -REEL variant provides Cut Tape & Digi-Reel packaging for high-volume production.

Not Recommended for Direct Substitution:

MAX333CWP+ and MAX333EWP+ feature 250Ohm on-state resistance, fundamentally different from the 45Ohm specification of the DG333ADW. These parts are suitable only for applications where higher on-state resistance is acceptable and should not be used as direct replacements.

Frequently Asked Questions (FAQ)

Q: Can DG333ADW-E3 be used as a direct replacement for the obsolete DG333ADW?

A: Yes. DG333ADW-E3 maintains identical electrical specifications including 45Ohm on-state resistance, 2Ohm channel-to-channel matching, supply voltage ranges (5V ~ 40V single, ±4V ~ 22V dual), and operating temperature range (-40°C ~ 85°C). The primary differences are Active product status and ROHS3 compliance. Packaging format differs (Tube versus original specification), but the 20-SOIC footprint remains unchanged.

Q: What is the key difference between MAX333AEWP+ and MAX333ACWP+?

A: Both parts maintain 45Ohm on-state resistance and identical switching characteristics. The primary difference is operating temperature range: MAX333AEWP+ supports -40°C ~ 85°C, while MAX333ACWP+ is limited to 0°C ~ 70°C. For applications requiring extended low-temperature operation, MAX333AEWP+ is the appropriate choice.

Q: Are ADG333ABRZ and DG333ADW-E3 interchangeable?

A: Both parts are functionally compatible as 4-circuit SPDT switches in 20-SOIC packages with 45Ohm on-state resistance. However, ADG333ABRZ features improved performance characteristics: faster switch times (90ns/80ns typical versus 175ns/145ns) and lower charge injection (2pC versus 10pC). Supply voltage ranges differ slightly (3V ~ 30V single supply versus 5V ~ 40V). Selection depends on application requirements for switching speed and supply voltage compatibility.

Q: Why are MAX333CWP+ and MAX333EWP+ listed as alternatives if they have 250Ohm resistance?

A: MAX333CWP+ and MAX333EWP+ are included for reference only and are not direct substitutes. The 250Ohm on-state resistance represents a fundamental specification change unsuitable for applications designed around the 45Ohm characteristic of the DG333ADW. These parts are listed to prevent accidental selection and to clarify that they do not meet substitution criteria.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Tube (standard packaging for manual assembly), Tape & Reel (TR) for automated pick-and-place assembly, and Cut Tape & Digi-Reel for high-volume production. Part number suffixes indicate packaging: +T denotes Tape & Reel, -REEL denotes Digi-Reel, and no suffix typically indicates Tube packaging.

Q: Are all substitute parts RoHS compliant?

A: The original DG333ADW is RoHS non-compliant. All listed substitute parts carry ROHS3 compliance, meeting current environmental and regulatory requirements. This compliance status is a key advantage of transitioning from the obsolete DG333ADW to active alternatives.

Q: What is the significance of channel-to-channel matching (ΔRon)?

A: Channel-to-channel matching specifies the maximum resistance variation between the four independent switch circuits within a single IC. The DG333ADW and most substitutes maintain 2Ohm maximum matching, ensuring uniform switching characteristics across all channels. ADG333ABRZ features 5Ohm matching, which may be acceptable for applications with less stringent matching requirements.

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