DG442LDY-T1-E3 Equivalent & Substitute Parts

Part Overview

The DG442LDY-T1-E3 is a 4-circuit SPST-NO analog switch IC manufactured by Vishay Siliconix in 16-SOIC surface mount package. This part features 30Ohm on-state resistance, single supply voltage range of 2.7V to 12V, and dual supply capability of ±3V to ±6V. The device is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across switching performance, package form factor, and electrical operating parameters.

Key Parameters

Parameter	DG442LDY-T1-E3
Switch Circuit Type	SPST - NO
Number of Circuits	4
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	30Ohm
Channel-to-Channel Matching (ΔRon)	100mOhm
Voltage - Supply, Single (V+)	2.7V ~ 12V
Voltage - Supply, Dual (V±)	±3V ~ 6V
Switch Time (Ton, Toff) (Max)	60ns, 35ns
-3dB Bandwidth	280MHz
Charge Injection	5pC
Channel Capacitance (CS(off), CD(off))	5pF, 6pF
Current - Leakage (IS(off)) (Max)	1nA
Crosstalk	-95dB @ 1MHz
Operating Temperature	-40°C ~ 85°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution compatibility for the DG442LDY-T1-E3 is determined by the following critical parameters: switch circuit topology (SPST-NO), circuit count (4), multiplexer configuration (1:1), package type (16-SOIC), and surface mount capability. On-state resistance, supply voltage ranges, switching speed, and leakage current are secondary selection criteria that determine functional suitability within specific application contexts.

Substitute parts are grouped into three categories based on on-state resistance characteristics:

Group 1 - Lower Resistance (26Ohm): DG442LEDY-T1-GE3 provides improved on-state resistance with extended single supply voltage range (3V ~ 16V) and dual supply range (±3V ~ 8V). This part is active and available in Tape & Reel packaging.

Group 2 - Moderate Resistance (70-85Ohm): ADG442BRZ, ADG442BRZ-REEL, DG442CY+, DG442DY+, DG442DY+T, DG442DYZ, and DG442DYZ-T represent alternatives with higher on-state resistance but extended supply voltage ranges and improved crosstalk performance. These parts accommodate applications requiring higher supply voltages (10V ~ 34V single supply, ±4.5V ~ 22V dual supply).

Group 3 - Higher Resistance (135Ohm): ALD4202MSCL and ALD4212SCL offer significantly higher on-state resistance with lower leakage current (100pA) and reduced charge injection. These parts are suitable for low-power applications with relaxed switching speed requirements.

Parameter Comparison

Part Number	Manufacturer	On-State Resistance (Max)	V+ Supply Range	V± Supply Range	Switch Time Ton/Toff (Max)	Leakage Current (Max)	Crosstalk	Operating Temp	Product Status	Packaging
DG442LDY-T1-E3	Vishay Siliconix	30Ohm	2.7V ~ 12V	±3V ~ 6V	60ns, 35ns	1nA	-95dB @ 1MHz	-40°C ~ 85°C	Obsolete	Tube
DG442LEDY-T1-GE3	Vishay Siliconix	26Ohm	3V ~ 16V	±3V ~ 8V	60ns, 35ns	1nA	-114dB @ 1MHz	-40°C ~ 85°C	Active	Tape & Reel
ADG442BRZ	Analog Devices Inc.	70Ohm	12V	±15V	110ns, 60ns	500pA	-100dB @ 1MHz	-40°C ~ 85°C	Active	Tube
ADG442BRZ-REEL	Analog Devices Inc.	70Ohm	12V	±15V	110ns, 60ns	500pA	-100dB @ 1MHz	-40°C ~ 85°C	Active	Cut Tape & Digi-Reel
ALD4202MSCL	Advanced Linear Devices Inc.	135Ohm	3V ~ 12V	±1.5V ~ 6V	240ns, 130ns	100pA	-90dB @ 100kHz	0°C ~ 70°C	Active	Tube
ALD4212SCL	Advanced Linear Devices Inc.	135Ohm	3V ~ 12V	±1.5V ~ 6V	130ns, 130ns	100pA	-90dB @ 100kHz	-40°C ~ 85°C	Active	Tube
DG442CY+	Analog Devices Inc./Maxim Integrated	85Ohm	10V ~ 30V	±4.5V ~ 20V	250ns, 170ns	500pA	-100dB @ 1MHz	0°C ~ 70°C	Active	Tube
DG442DY+	Analog Devices Inc./Maxim Integrated	85Ohm	10V ~ 30V	±4.5V ~ 20V	250ns, 170ns	500pA	-100dB @ 1MHz	-40°C ~ 85°C	Active	Tube
DG442DY+T	Analog Devices Inc./Maxim Integrated	85Ohm	10V ~ 30V	±4.5V ~ 20V	250ns, 170ns	500pA	-100dB @ 1MHz	-40°C ~ 85°C	Active	Tape & Reel
DG442DYZ	Renesas Electronics Corporation	85Ohm	5V ~ 34V	±5V ~ 22V	250ns, 210ns	500pA	-100dB @ 1MHz	-40°C ~ 85°C	Active	Tube
DG442DYZ-T	Renesas Electronics Corporation	85Ohm	5V ~ 34V	±5V ~ 22V	250ns, 210ns	500pA	-100dB @ 1MHz	-40°C ~ 85°C	Active	Tape & Reel

Engineering Selection Recommendations

Primary Recommendation: DG442LEDY-T1-GE3

The DG442LEDY-T1-GE3 is the direct successor to the DG442LDY-T1-E3. Both parts share the same base product number (DG442), identical package (16-SOIC), and matching circuit topology (4-circuit SPST-NO 1:1). The DG442LEDY-T1-GE3 offers superior on-state resistance (26Ohm vs. 30Ohm), improved crosstalk performance (-114dB vs. -95dB @ 1MHz), and extended supply voltage ranges. This part is active with 2700 units in stock and ROHS3 compliant. Operating temperature range matches the original part (-40°C ~ 85°C).

Secondary Recommendations for Extended Supply Voltage Applications:

DG442DY+ and DG442DY+T accommodate applications requiring higher supply voltages (10V ~ 30V single supply, ±4.5V ~ 20V dual supply) with -40°C ~ 85°C operating temperature coverage. These parts maintain 4-circuit SPST-NO topology in 16-SOIC package with ROHS3 compliance. On-state resistance increases to 85Ohm, requiring circuit-level evaluation for current-limiting applications.

DG442DYZ and DG442DYZ-T extend supply voltage capability further (5V ~ 34V single supply, ±5V ~ 22V dual supply) with identical switching topology and package. These Renesas parts maintain -40°C ~ 85°C operating temperature and ROHS3 compliance but carry MSL-3 moisture sensitivity rating (168 hours) versus MSL-1 for other alternatives.

Alternative for Low-Power Applications:

ALD4212SCL provides 135Ohm on-state resistance with significantly reduced leakage current (100pA vs. 1nA) and charge injection (0.2pC vs. 5pC). This part is suitable for battery-powered or ultra-low-power switching applications where leakage minimization is critical. Operating temperature range extends to -40°C ~ 85°C with ROHS3 compliance.

All recommended substitutes maintain 16-SOIC surface mount package, ROHS3 compliance, and MSL-1 moisture sensitivity (except DG442DYZ variants), ensuring compatibility with existing PCB designs and manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can DG442LEDY-T1-GE3 directly replace DG442LDY-T1-E3 in existing designs?

A: Yes. Both parts share identical package (16-SOIC), circuit topology (4-circuit SPST-NO 1:1), and operating temperature range (-40°C ~ 85°C). The DG442LEDY-T1-GE3 features lower on-state resistance (26Ohm vs. 30Ohm) and improved crosstalk, making it functionally superior. Supply voltage ranges are compatible for applications operating within 3V ~ 12V single supply or ±3V ~ 6V dual supply.

Q: What is the impact of higher on-state resistance in substitute parts?

A: On-state resistance directly affects signal attenuation and power dissipation in analog switching applications. Parts with 70-85Ohm resistance (ADG442BRZ, DG442DY+, DG442DYZ) introduce greater signal loss than the original 30Ohm specification. Circuit-level analysis is required to confirm acceptable performance in signal path applications. These parts are suitable for control signal switching where attenuation is acceptable.

Q: Are all substitute parts available in Tape & Reel packaging?

A: No. DG442LEDY-T1-GE3, DG442DY+T, and DG442DYZ-T are available in Tape & Reel (TR) packaging for automated assembly. ADG442BRZ-REEL offers Cut Tape & Digi-Reel packaging. ALD4202MSCL and ALD4212SCL are supplied in Tube packaging only. Packaging selection depends on production volume and assembly equipment compatibility.

Q: What are the moisture sensitivity implications for long-term storage?

A: DG442LDY-T1-E3 and most active substitutes carry MSL-1 (Unlimited) rating, allowing indefinite storage without baking requirements. DG442DYZ and DG442DYZ-T carry MSL-3 (168 hours) rating, requiring baking at 125°C for 24 hours if storage exceeds 168 hours at 30°C/60% RH. Verify storage conditions and handling procedures for MSL-3 parts before procurement.

Q: Can ALD4212SCL replace DG442LDY-T1-E3 in high-speed applications?

A: No. ALD4212SCL exhibits significantly slower switching performance (130ns Toff vs. 35ns for the original part) and lower bandwidth capability. This part is suitable only for low-speed switching applications where leakage current minimization is the primary design constraint. High-speed signal routing applications require parts with faster switching times such as DG442LEDY-T1-GE3 or ADG442BRZ.

Q: What supply voltage range should be verified when selecting a substitute?

A: Verify that the substitute part's single supply (V+) and dual supply (V±) ranges encompass the application's operating voltage. DG442LEDY-T1-GE3 supports 3V ~ 16V single supply (vs. 2.7V ~ 12V original), requiring confirmation that 2.7V operation is not required. Parts with extended ranges (DG442DYZ: 5V ~ 34V) may require circuit redesign if minimum supply voltage is below the part's specification.

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