DG444DY Equivalent & Substitute Parts

Part Overview

The DG444DY is a 4-circuit SPST-NC (Single Pole Single Throw - Normally Closed) analog switch IC manufactured by Vishay Siliconix in 16-SOIC surface mount packaging. This interface component operates across a wide supply voltage range (5V to 36V single supply, or ±5V to ±20V dual supply) with 85Ohm on-state resistance and 250ns/140ns switching times. The DG444DY is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Active alternatives from Analog Devices, Renesas, and other manufacturers provide direct or functional replacements with improved compliance status and availability.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NC (Single Pole Single Throw - Normally Closed)
Number of Circuits	4
Multiplexer/Demultiplexer Configuration	1:1
On-State Resistance (Max)	85Ohm
Voltage Supply - Single (V+)	5V ~ 36V
Voltage Supply - Dual (V±)	±5V ~ 20V
Switch Time Ton (Max)	250ns
Switch Time Toff (Max)	140ns
Charge Injection	-1pC
Channel Capacitance (CS(off), CD(off))	4pF, 4pF
Current - Leakage (IS(off)) Max	500pA
Crosstalk	-100dB @ 1MHz
Operating Temperature	-40°C ~ 85°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the DG444DY is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria (Must Match):

Switch circuit type: SPST - NC
Number of circuits: 4
Multiplexer configuration: 1:1
Package type: 16-SOIC surface mount
Operating temperature range: -40°C to 85°C (or compatible subset)
Leakage current: 500pA maximum

Secondary Compatibility Parameters (Allowable Variation):

On-state resistance: 85Ohm nominal (70Ohm acceptable for improved performance)
Supply voltage ranges: Must support at least 5V to 36V single supply or equivalent dual supply
Switch timing: 250ns/140ns or faster
Charge injection and capacitance: Minor variations acceptable within functional limits
Crosstalk: -100dB @ 1MHz or better

Compliance Considerations:

RoHS3 compliance preferred for new designs
MSL rating of 1 or 3 acceptable for standard assembly processes
Active product status required for long-term availability

Substitutes are grouped into three categories: direct parametric equivalents (identical specifications), performance-enhanced alternatives (improved electrical characteristics), and functional alternatives (different base part numbers with compatible operation).

Parameter Comparison

Part Number	Manufacturer	On-State Resistance (Max)	V+ Supply Range	V± Supply Range	Ton/Toff (Max)	Charge Injection	Operating Temp	Product Status	RoHS Status	Packaging
DG444DY	Vishay Siliconix	85Ohm	5V ~ 36V	±5V ~ 20V	250ns, 140ns	-1pC	-40°C ~ 85°C	Obsolete	Non-compliant	Tube
DG444DY-E3	Vishay Siliconix	85Ohm	5V ~ 36V	±5V ~ 20V	250ns, 140ns	-1pC	-40°C ~ 85°C	Active	ROHS3 Compliant	Tube
DG444DY+	Analog Devices Inc./Maxim Integrated	85Ohm	10V ~ 30V	±4.5V ~ 20V	250ns, 140ns	5pC	-40°C ~ 85°C	Active	ROHS3 Compliant	Tube
DG444DY+T	Analog Devices Inc./Maxim Integrated	85Ohm	10V ~ 30V	±4.5V ~ 20V	250ns, 140ns	5pC	-40°C ~ 85°C	Active	ROHS3 Compliant	Tape & Reel (TR)
DG444CY+	Analog Devices Inc./Maxim Integrated	85Ohm	10V ~ 30V	±4.5V ~ 20V	250ns, 140ns	5pC	0°C ~ 70°C	Active	ROHS3 Compliant	Tube
DG444DYZ	Renesas Electronics Corporation	85Ohm	5V ~ 34V	±5V ~ 22V	250ns, 140ns	-1pC	-40°C ~ 85°C	Active	ROHS3 Compliant	Tube
DG444DYZ-T	Renesas Electronics Corporation	85Ohm	5V ~ 34V	±5V ~ 22V	250ns, 140ns	-1pC	-40°C ~ 85°C	Active	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®
ADG444BRZ	Analog Devices Inc.	70Ohm	12V	±15V	110ns, 60ns	1pC	-40°C ~ 85°C	Active	ROHS3 Compliant	Tube
ADG444BRZ-REEL	Analog Devices Inc.	70Ohm	12V	±15V	110ns, 60ns	1pC	-40°C ~ 85°C	Active	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®
MAX312CSE+	Analog Devices Inc./Maxim Integrated	10Ohm	4.5V ~ 30V	±4.5V ~ 20V	225ns, 185ns	20pC	0°C ~ 70°C	Active	ROHS3 Compliant	Tube
MAX312CSE+T	Analog Devices Inc./Maxim Integrated	10Ohm	4.5V ~ 30V	±4.5V ~ 20V	225ns, 185ns	20pC	0°C ~ 70°C	Active	ROHS3 Compliant	Tape & Reel (TR)

Engineering Selection Recommendations

Direct Parametric Equivalents (Preferred for Pin-Compatible Replacement):

DG444DY-E3 is the primary direct equivalent, offering identical electrical specifications to the original DG444DY while maintaining active product status and ROHS3 compliance. This part is suitable for designs requiring no circuit modification.

DG444DYZ and DG444DYZ-T (Renesas) provide equivalent performance with slightly extended supply voltage ranges (5V to 34V single supply, ±5V to ±22V dual supply) and active status. These parts are suitable for applications requiring extended voltage margins.

Active Alternatives with Identical Switching Characteristics:

DG444DY+ and DG444DY+T (Analog Devices/Maxim) maintain 85Ohm on-state resistance and identical switching times but operate within narrower supply ranges (10V to 30V single supply, ±4.5V to ±20V dual supply). These parts are suitable for designs with fixed supply voltages within the specified ranges.

DG444CY+ operates identically to DG444DY+ but with a reduced operating temperature range (0°C to 70°C). This part is suitable for commercial-grade applications not requiring extended temperature operation.

Performance-Enhanced Alternatives:

ADG444BRZ and ADG444BRZ-REEL (Analog Devices) offer improved performance with 70Ohm on-state resistance (15% lower than DG444DY) and faster switching times (110ns/60ns versus 250ns/140ns). These parts operate at fixed supply voltages (12V single, ±15V dual) and are suitable for designs where lower on-state resistance and faster switching are beneficial and supply voltages are compatible.

Low-Resistance Alternative:

MAX312CSE+ and MAX312CSE+T (Analog Devices/Maxim) provide significantly lower on-state resistance (10Ohm) for applications requiring minimal signal attenuation. These parts operate across 4.5V to 30V single supply and ±4.5V to ±20V dual supply ranges but are limited to 0°C to 70°C operating temperature and have higher charge injection (20pC). These parts are suitable for low-impedance signal switching applications within the commercial temperature range.

Compliance and Availability:

All recommended substitutes carry ROHS3 compliance and active product status, ensuring long-term availability and regulatory compliance for new designs. Packaging options (Tube, Tape & Reel, Cut Tape) are available across multiple manufacturers to accommodate different assembly processes and volume requirements.

Frequently Asked Questions (FAQ)

Q: Can DG444DY-E3 be used as a direct replacement for DG444DY?

A: Yes. DG444DY-E3 is a direct parametric equivalent with identical electrical specifications, 16-SOIC package, and pin configuration. The primary difference is active product status and ROHS3 compliance. No circuit modifications are required.

Q: What is the key difference between DG444DY+ and DG444DY?

A: DG444DY+ maintains identical on-state resistance (85Ohm) and switching times (250ns/140ns) but operates within narrower supply voltage ranges (10V to 30V single supply versus 5V to 36V). DG444DY+ is suitable for designs with fixed supply voltages within this range. Charge injection is higher (5pC versus -1pC), which may affect precision analog applications.

Q: Is ADG444BRZ compatible with DG444DY in all applications?

A: ADG444BRZ is electrically compatible but operates at fixed supply voltages (12V single, ±15V dual) compared to DG444DY's wide range (5V to 36V single, ±5V to ±20V dual). ADG444BRZ offers superior performance with 70Ohm on-state resistance and faster switching (110ns/60ns). Compatibility depends on whether your design's supply voltages match the ADG444BRZ specifications.

Q: Can MAX312CSE+ replace DG444DY?

A: MAX312CSE+ is functionally compatible as a 4-circuit SPST-NC switch in 16-SOIC packaging but differs significantly in on-state resistance (10Ohm versus 85Ohm), operating temperature range (0°C to 70°C versus -40°C to 85°C), and charge injection (20pC versus -1pC). Use MAX312CSE+ only when lower on-state resistance is required and operating temperature does not exceed 70°C.

Q: What packaging options are available for DG444DY substitutes?

A: Substitutes are available in three packaging formats: Tube (standard for manual assembly), Tape & Reel (TR) for automated pick-and-place assembly, and Cut Tape (CT) & Digi-Reel® for mixed-volume production. Select packaging based on your assembly process and volume requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitute parts carry ROHS3 compliance. The original DG444DY is RoHS non-compliant, making RoHS3-compliant substitutes necessary for designs subject to RoHS regulations.

Q: What is the difference between DG444DYZ and DG444DY-E3?

A: Both are direct equivalents to DG444DY with identical switching characteristics and 85Ohm on-state resistance. DG444DYZ (Renesas) offers slightly extended supply voltage ranges (5V to 34V single, ±5V to ±22V dual) compared to DG444DY-E3 (5V to 36V single, ±5V to ±20V dual). Both are active and ROHS3 compliant. Selection depends on manufacturer preference and supply chain availability.

Q: Can I use DG444DY+ in place of DG444DY in a circuit designed for 5V supply?

A: No. DG444DY+ minimum single supply voltage is 10V, making it incompatible with 5V designs. Use DG444DY-E3 or DG444DYZ for 5V applications.

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

A: Charge injection affects signal accuracy in precision analog applications. DG444DY and DG444DYZ have -1pC charge injection, while DG444DY+ has 5pC and MAX312CSE+ has 20pC. For precision applications, lower charge injection is preferred. For general switching applications, charge injection differences are typically negligible.

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