DG441LDY Equivalent & Substitute Parts

Part Overview

The DG441LDY is a 4-circuit SPST-NC analog switch IC manufactured by Vishay Siliconix in 16-SOIC surface mount packaging. This device features 30Ohm on-state resistance, dual supply capability (±3V to ±6V), and operates across the -40°C to 85°C temperature range. The DG441LDY is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. Active alternatives with comparable or enhanced electrical characteristics are available from multiple manufacturers including Analog Devices, Renesas Electronics, and Advanced Linear Devices.

Key Parameters

Parameter	DG441LDY	Unit
Switch Circuit Configuration	SPST - NC	—
Number of Circuits	4	—
Multiplexer/Demultiplexer Circuit	1:1	—
On-State Resistance (Max)	30	Ohm
Channel-to-Channel Matching (ΔRon)	100	mOhm
Voltage - Supply, Single (V+)	2.7 ~ 12	V
Voltage - Supply, Dual (V±)	±3 ~ 6	V
Switch Time (Ton, Toff) (Max)	60, 35	ns
-3dB Bandwidth	280	MHz
Charge Injection	5	pC
Channel Capacitance (CS(off), CD(off))	5, 6	pF
Current - Leakage (IS(off)) (Max)	1	nA
Crosstalk	-95	dB @ 1MHz
Operating Temperature	-40 ~ 85	°C
Package / Case	16-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Product Status	Obsolete	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the DG441LDY is determined by strict compatibility across electrical and mechanical parameters. All substitute parts must maintain the following core criteria:

Mandatory Compatibility Parameters:

Switch circuit configuration: SPST - NC
Number of circuits: 4
Multiplexer/Demultiplexer circuit: 1:1
Package / Case: 16-SOIC (0.154", 3.90mm Width)
Mounting type: Surface Mount
Operating temperature range: -40°C to 85°C minimum

Electrical Performance Considerations: Substitute parts are grouped by on-state resistance (Ron), which directly affects signal integrity and power dissipation. The DG441LDY operates at 30Ohm maximum. Substitutes with higher Ron values (70Ohm, 85Ohm, 135Ohm, 160Ohm) remain functionally equivalent for applications where the increased resistance is acceptable within circuit design margins. Supply voltage ranges and switching characteristics vary across substitutes but remain within the operational envelope of typical analog switch applications.

Compliance and Status: The DG441LDY is RoHS non-compliant and obsolete. Active substitutes are RoHS3 compliant and carry active product status, ensuring long-term availability and manufacturing support.

Parameter Comparison

Part Number	Manufacturer	Ron (Max) Ohm	V+ (V)	V± (V)	Ton/Toff (ns)	Charge Injection (pC)	IS(off) (Max) (pA)	Crosstalk (dB @ 1MHz)	Product Status	RoHS Status
DG441LDY	Vishay Siliconix	30	2.7 ~ 12	±3 ~ 6	60, 35	5	1	-95	Obsolete	RoHS non-compliant
ADG441BRZ	Analog Devices Inc.	70	12	±15	110, 60	1	500	-100	Active	ROHS3 Compliant
ADG441BRZ-REEL	Analog Devices Inc.	70	12	±15	110, 60	1	500	-100	Active	ROHS3 Compliant
ALD4211SCL	Advanced Linear Devices Inc.	135	3 ~ 12	±1.5 ~ 6	130, 130	0.2	100	-90 @ 100kHz	Active	ROHS3 Compliant
DG441DYZ	Renesas Electronics Corporation	85	5 ~ 34	±5 ~ 22	250, 120	-1	500	-100	Active	ROHS3 Compliant
DG441DYZ-T	Renesas Electronics Corporation	85	5 ~ 34	±5 ~ 22	250, 120	-1	500	-100	Active	ROHS3 Compliant
MAX4511CSE+	Analog Devices Inc./Maxim Integrated	160	9 ~ 36	±4.5 ~ 18	500, 400	1.5	500	-66	Active	ROHS3 Compliant
MAX4511CSE+T	Analog Devices Inc./Maxim Integrated	160	9 ~ 36	±4.5 ~ 18	500, 400	1.5	500	-66	Active	ROHS3 Compliant
MAX4511ESE+	Analog Devices Inc./Maxim Integrated	160	9 ~ 36	±4.5 ~ 18	500, 400	1.5	500	-66	Active	ROHS3 Compliant
MAX4511ESE+T	Analog Devices Inc./Maxim Integrated	160	9 ~ 36	±4.5 ~ 18	500, 400	1.5	500	-66	Active	ROHS3 Compliant
MAX4711CSE+	Analog Devices Inc./Maxim Integrated	25	2.7 ~ 11	±2.7 ~ 5.5	125, 80	25	500	-87	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute - Lowest Ron: MAX4711CSE+ provides the closest on-state resistance match at 25Ohm, maintaining signal integrity comparable to the DG441LDY. This part is RoHS3 compliant and active, with supply voltage ranges (2.7V ~ 11V single, ±2.7V ~ 5.5V dual) that overlap the original specification. Operating temperature extends to 0°C minimum, meeting the -40°C to 85°C requirement.

Secondary Substitute - Balanced Performance: DG441DYZ and DG441DYZ-T (Renesas) offer 85Ohm on-state resistance with extended supply voltage capability (5V ~ 34V single, ±5V ~ 22V dual). These parts maintain the DG441 base product lineage, ensuring design compatibility. Both are RoHS3 compliant and active with full -40°C to 85°C operating range.

Alternative Substitute - Low Leakage: ALD4211SCL (Advanced Linear Devices) features the lowest charge injection (0.2pC) and leakage current (100pA maximum), suitable for precision analog applications. At 135Ohm on-state resistance, this part requires circuit margin verification. Supply ranges (3V ~ 12V single, ±1.5V ~ 6V dual) are compatible with the original specification.

Higher Ron Substitutes: ADG441BRZ and MAX4511 series parts (70Ohm to 160Ohm) are suitable for applications where increased on-state resistance is acceptable. All are RoHS3 compliant and active. ADG441BRZ provides the best crosstalk performance (-100dB @ 1MHz) among higher Ron options.

Compliance Requirement: All recommended substitutes are RoHS3 compliant and carry active product status, ensuring regulatory compliance and manufacturing continuity beyond the obsolete DG441LDY.

Frequently Asked Questions (FAQ)

Q: Can I directly replace DG441LDY with any of these substitutes? A: Direct replacement requires verification of on-state resistance (Ron) compatibility within your circuit design. The DG441LDY operates at 30Ohm maximum. MAX4711CSE+ (25Ohm) is the closest match. Higher Ron substitutes (70Ohm to 160Ohm) require circuit margin analysis to confirm acceptable signal attenuation and power dissipation.

Q: What is the difference between ADG441BRZ and ADG441BRZ-REEL? A: Both parts are electrically identical with 70Ohm on-state resistance. ADG441BRZ is supplied in Tube packaging, while ADG441BRZ-REEL is supplied in Cut Tape and Digi-Reel format. Selection depends on assembly process requirements and quantity needs.

Q: Are all substitutes RoHS compliant? A: Yes. All listed substitutes are RoHS3 compliant. The original DG441LDY is RoHS non-compliant, making these substitutes necessary for new designs subject to RoHS regulations.

Q: Do all substitutes operate at -40°C to 85°C? A: Most substitutes support the full -40°C to 85°C range. MAX4711CSE+ and MAX4511CSE+ operate from 0°C minimum. Verify temperature requirements for your specific application.

Q: What is the significance of on-state resistance (Ron) differences? A: Ron directly affects signal attenuation and power dissipation. Lower Ron (25Ohm to 30Ohm) minimizes signal loss in high-frequency applications. Higher Ron (85Ohm to 160Ohm) increases insertion loss and power consumption but may be acceptable in lower-frequency or lower-impedance circuits. Circuit simulation is recommended when Ron differs significantly from the original specification.

Q: Can I use MAX4511 series parts as direct replacements? A: MAX4511 series parts (160Ohm Ron) have significantly higher on-state resistance than the DG441LDY (30Ohm). These are suitable only for applications where the increased resistance is within design margins. Extended supply voltage capability (9V ~ 36V single, ±4.5V ~ 18V dual) makes these parts suitable for higher-voltage systems.

Q: What does "SPST - NC" mean? A: SPST-NC denotes Single-Pole Single-Throw Normally Closed configuration. The switch maintains a closed connection in the off state and opens when activated. All listed substitutes maintain this configuration.

Q: Are packaging dimensions identical across all substitutes? A: Yes. All substitutes use 16-SOIC surface mount packaging with 0.154" (3.90mm) width, ensuring PCB footprint compatibility with the original DG441LDY.

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