DG442LDY-T1 Equivalent & Substitute Parts

Part Overview

The DG442LDY-T1 is a 4-circuit SPST-NO analog switch IC manufactured by Vishay Siliconix, housed in a 16-SOIC surface mount package. This component features a 30Ohm on-state resistance and operates across supply voltages of 2.7V to 12V (single supply) or ±3V to ±6V (dual supply). The device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	DG442LDY-T1 Value
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 (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the DG442LDY-T1 is determined by the following critical parameters:

Circuit Configuration: All substitutes must maintain SPST-NO topology with 4 circuits in 1:1 multiplexer configuration
Package Compatibility: All substitutes must use 16-SOIC surface mount package (0.154", 3.90mm width)
Operating Temperature Range: Substitutes must support the required temperature range for the application
Supply Voltage Compatibility: Substitutes must accommodate the system's supply voltage requirements
On-State Resistance: Substitutes with higher Ron values are acceptable if system impedance requirements permit
RoHS Compliance: Active substitutes with RoHS3 compliance are preferred for new designs

Substitute parts are grouped by on-state resistance characteristics and supply voltage ranges, as these parameters directly impact circuit performance and system compatibility.

Parameter Comparison

Parameter	DG442LDY-T1	MAX392CSE+	MAX392CSE+T	ADG442BRZ	ADG442BRZ-REEL	ALD4212SCL	ALD4202MSCL	DG442DYZ	DG442DYZ-T	MAX4512ESE+	MAX4512CSE+
Switch Circuit	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Multiplexer/Demultiplexer	1:1	1:1	1:1	1:1	1:1	1:1	1:1	1:1	1:1	1:1	1:1
On-State Resistance (Max)	30Ohm	35Ohm	35Ohm	70Ohm	70Ohm	135Ohm	135Ohm	85Ohm	85Ohm	160Ohm	160Ohm
Voltage - Supply, Single (V+)	2.7V ~ 12V	3V ~ 15V	3V ~ 15V	12V	12V	3V ~ 12V	3V ~ 12V	5V ~ 34V	5V ~ 34V	9V ~ 36V	9V ~ 36V
Voltage - Supply, Dual (V±)	±3V ~ 6V	±3V ~ 8V	±3V ~ 8V	±15V	±15V	±1.5V ~ 6V	±1.5V ~ 6V	±5V ~ 22V	±5V ~ 22V	±4.5V ~ 18V	±4.5V ~ 18V
Switch Time (Ton, Toff) (Max)	60ns, 35ns	130ns, 75ns	130ns, 75ns	110ns, 60ns	110ns, 60ns	130ns, 130ns	240ns, 130ns	250ns, 210ns	250ns, 210ns	500ns, 400ns	500ns, 400ns
Charge Injection	5pC	2pC	2pC	1pC	1pC	0.2pC	1pC	-1pC	-1pC	1.5pC	1.5pC
Channel Capacitance (CS(off), CD(off))	5pF, 6pF	9pF, 9pF	9pF, 9pF	4pF, 4pF	4pF, 4pF	3pF, 3pF	3pF, 3pF	4pF, 4pF	4pF, 4pF	10pF, 5pF	10pF, 5pF
Current - Leakage (IS(off)) (Max)	1nA	100pA	100pA	500pA	500pA	100pA	100pA	500pA	500pA	500pA	500pA
Crosstalk	-95dB @ 1MHz	-85dB @ 1MHz	-85dB @ 1MHz	-100dB @ 1MHz	-100dB @ 1MHz	-90dB @ 100kHz	-90dB @ 100kHz	-100dB @ 1MHz	-100dB @ 1MHz	-66dB @ 1MHz	-66dB @ 1MHz
Operating Temperature	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain the core SPST-NO 4-circuit topology in 16-SOIC packaging, ensuring mechanical and functional compatibility with the DG442LDY-T1 footprint.

For applications requiring extended temperature range (-40°C to 85°C):

ADG442BRZ / ADG442BRZ-REEL (Analog Devices Inc.) — Active status, RoHS3 compliant, 70Ohm Ron
ALD4212SCL (Advanced Linear Devices Inc.) — Active status, RoHS3 compliant, 135Ohm Ron
DG442DYZ / DG442DYZ-T (Renesas Electronics Corporation) — Active status, RoHS3 compliant, 85Ohm Ron
MAX4512ESE+ (Analog Devices Inc./Maxim Integrated) — Active status, RoHS3 compliant, 160Ohm Ron

For applications with restricted temperature range (0°C to 70°C):

MAX392CSE+ / MAX392CSE+T (Analog Devices Inc./Maxim Integrated) — Active status, RoHS3 compliant, 35Ohm Ron
ALD4202MSCL (Advanced Linear Devices Inc.) — Active status, RoHS3 compliant, 135Ohm Ron
MAX4512CSE+ (Analog Devices Inc./Maxim Integrated) — Active status, RoHS3 compliant, 160Ohm Ron

All substitute parts carry RoHS3 compliance and REACH unaffected status, supporting modern regulatory requirements. Selection should prioritize on-state resistance compatibility with system impedance specifications and supply voltage alignment with available power rails.

Frequently Asked Questions (FAQ)

Q: Can I directly replace DG442LDY-T1 with any of these substitutes?

A: Direct replacement requires verification of three factors: (1) system supply voltage compatibility with the substitute's rated range, (2) circuit impedance tolerance for the substitute's on-state resistance, and (3) operating temperature range requirements. All substitutes share the same 16-SOIC package and SPST-NO 4-circuit configuration, enabling mechanical and functional compatibility.

Q: What is the significance of on-state resistance (Ron) differences?

A: On-state resistance directly affects signal attenuation and power dissipation in analog switching applications. The DG442LDY-T1 specifies 30Ohm maximum. Substitutes range from 35Ohm (MAX392 series) to 160Ohm (MAX4512 series). Higher Ron values introduce greater signal loss and heat generation. Selection depends on system impedance requirements and acceptable signal degradation.

Q: Why do some substitutes have different supply voltage ranges?

A: Supply voltage ranges reflect the semiconductor design and internal circuit topology. The DG442LDY-T1 operates at 2.7V to 12V (single supply) or ±3V to ±6V (dual supply). Substitutes with wider ranges (e.g., DG442DYZ at 5V to 34V) offer flexibility for higher-voltage systems but may not support the lower 2.7V minimum. Verify system voltage compatibility before selection.

Q: What is the difference between tube and tape & reel packaging?

A: Tube packaging (e.g., ADG442BRZ) is suitable for lower-volume applications and manual assembly. Tape & Reel packaging (e.g., ADG442BRZ-REEL, DG442DYZ-T) is optimized for automated pick-and-place assembly in high-volume production. Both contain identical die and electrical specifications; packaging choice depends on manufacturing process requirements.

Q: Are all active substitutes RoHS3 compliant?

A: Yes. All listed active substitutes carry RoHS3 compliance certification. The original DG442LDY-T1 is RoHS non-compliant due to its obsolete status. RoHS3 compliance is mandatory for new designs targeting EU and similar regulated markets.

Q: How do I select between multiple substitutes with similar specifications?

A: Prioritize based on: (1) on-state resistance closest to the original 30Ohm specification if impedance matching is critical, (2) operating temperature range matching your application requirements, (3) supply voltage range compatibility with your system, and (4) availability and lead time from qualified distributors.

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