DG9461DY Equivalent & Substitute Parts

Part Overview

The DG9461DY is a single-circuit SPDT (Single Pole Double Throw) analog switch IC manufactured by Vishay Siliconix in 8-SOIC surface mount packaging. This component functions as a 2:1 multiplexer/demultiplexer with 60Ohm on-state resistance, designed for signal routing and switching applications in analog circuits.

The DG9461DY is classified as obsolete. Equivalent substitute parts are available from Analog Devices Inc./Maxim Integrated in the MAX4544 series, which maintain functional compatibility while offering active product status and improved compliance certifications.

Key Parameters

Parameter	DG9461DY
Switch Circuit Configuration	SPDT
Multiplexer/Demultiplexer Circuit	2:1
Number of Circuits	1
On-State Resistance (Max)	60Ohm
Channel-to-Channel Matching (ΔRon)	400mOhm
Voltage - Supply, Single (V+)	2.7V ~ 5V
Switch Time Ton (Max)	75ns
Switch Time Toff (Max)	50ns
Charge Injection	2pC
Channel Capacitance (CS(off), CD(off))	7pF
Current - Leakage (IS(off)) (Max)	100pA
Operating Temperature	-40°C ~ 85°C
Package / Case	8-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 of the DG9461DY with MAX4544 series parts is based on the following critical parameters that must remain equivalent:

Core Functional Parameters (Must Match):

Switch Circuit: SPDT
Multiplexer/Demultiplexer Circuit: 2:1
Number of Circuits: 1
On-State Resistance (Max): 60Ohm
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount

Allowable Parameter Variations:

Channel-to-Channel Matching (ΔRon): MAX4544 series specifies 800mOhm (higher than DG9461DY's 400mOhm) but remains within acceptable tolerance for most applications
Voltage - Supply, Single (V+): MAX4544 series supports 2.7V ~ 12V (extended range compared to DG9461DY's 2.7V ~ 5V)
Switch Time: MAX4544 series specifies 100ns Ton and 75ns Toff (slightly longer than DG9461DY)
Charge Injection: MAX4544 series specifies 1pC (lower than DG9461DY's 2pC)
Channel Capacitance: MAX4544 series specifies 8pF (slightly higher than DG9461DY's 7pF)
Crosstalk: MAX4544 series specifies -90dB @ 1MHz (DG9461DY does not specify)

Packaging Variants: MAX4544 series is available in multiple packaging options: Tube (MAX4544CSA+, MAX4544ESA+), Tape & Reel (MAX4544CSA+T), and Cut Tape & Digi-Reel (MAX4544ESA+T). All variants maintain identical electrical specifications and 8-SOIC package dimensions.

Parameter Comparison

Parameter	DG9461DY	MAX4544CSA+	MAX4544CSA+T	MAX4544ESA+	MAX4544ESA+T
Switch Circuit	SPDT	SPDT	SPDT	SPDT	SPDT
Multiplexer/Demultiplexer Circuit	2:1	2:1	2:1	2:1	2:1
Number of Circuits	1	1	1	1	1
On-State Resistance (Max)	60Ohm	60Ohm	60Ohm	60Ohm	60Ohm
Channel-to-Channel Matching (ΔRon)	400mOhm	800mOhm	800mOhm	800mOhm	800mOhm
Voltage - Supply, Single (V+)	2.7V ~ 5V	2.7V ~ 12V	2.7V ~ 12V	2.7V ~ 12V	2.7V ~ 12V
Switch Time Ton (Max)	75ns	100ns	100ns	100ns	100ns
Switch Time Toff (Max)	50ns	75ns	75ns	75ns	75ns
Charge Injection	2pC	1pC	1pC	1pC	1pC
Channel Capacitance (CS(off), CD(off))	7pF	8pF, 8pF	8pF, 8pF	8pF, 8pF	8pF, 8pF
Current - Leakage (IS(off)) (Max)	100pA	100pA	100pA	100pA	100pA
Operating Temperature	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes for Extended Temperature Range (-40°C to 85°C):

MAX4544ESA+ and MAX4544ESA+T are the preferred substitutes when the full operating temperature range of the DG9461DY (-40°C ~ 85°C) is required. Both variants maintain identical electrical specifications and differ only in packaging format (Tube versus Cut Tape & Digi-Reel). MAX4544ESA+T offers the highest inventory availability (15,600 pcs) and is suitable for high-volume production requirements.

Substitutes for Standard Temperature Range (0°C to 70°C):

MAX4544CSA+ and MAX4544CSA+T are suitable for applications operating within the 0°C ~ 70°C temperature range. These variants provide cost-effective alternatives with identical electrical performance and are available in Tube and Tape & Reel packaging formats.

Compliance Considerations:

All MAX4544 series substitutes are ROHS3 compliant and carry active product status, providing long-term supply assurance and regulatory compliance advantages over the obsolete, RoHS non-compliant DG9461DY.

Packaging Selection:

Tube packaging (MAX4544CSA+, MAX4544ESA+): Suitable for lower-volume applications and manual assembly
Tape & Reel (MAX4544CSA+T): Standard for automated pick-and-place assembly
Cut Tape & Digi-Reel (MAX4544ESA+T): Flexible packaging for mixed-volume production

Frequently Asked Questions (FAQ)

Q: Can MAX4544 series parts directly replace DG9461DY in existing designs?

A: Yes, MAX4544 series parts are pin-compatible and functionally equivalent substitutes. The 8-SOIC package dimensions are identical, and core electrical parameters (SPDT configuration, 2:1 multiplexing, 60Ohm on-state resistance) match the DG9461DY. PCB layout modifications are not required.

Q: What is the significance of the higher Channel-to-Channel Matching (ΔRon) specification in MAX4544 parts?

A: MAX4544 series specifies 800mOhm channel matching compared to DG9461DY's 400mOhm. This parameter defines the maximum resistance variation between switch channels. The higher specification in MAX4544 parts remains acceptable for most analog switching applications where absolute matching is not critical. Applications requiring tighter matching should evaluate circuit-level impact.

Q: Why do MAX4544CSA+ and MAX4544CSA+T have a narrower operating temperature range (0°C ~ 70°C) compared to MAX4544ESA+ variants?

A: The temperature range difference reflects different device grades within the MAX4544 family. The "C" grade (MAX4544CSA+/CSA+T) is rated for commercial temperature range, while the "E" grade (MAX4544ESA+/ESA+T) is rated for extended industrial temperature range. For applications requiring -40°C ~ 85°C operation, MAX4544ESA+ or MAX4544ESA+T must be selected.

Q: What packaging format should be selected for high-volume production?

A: MAX4544ESA+T (Cut Tape & Digi-Reel format) is recommended for high-volume automated assembly, offering the highest inventory availability (15,600 pcs) and compatibility with standard pick-and-place equipment. Tape & Reel variants (MAX4544CSA+T, MAX4544ESA+T) are standard for production environments.

Q: Are there any electrical performance differences between MAX4544 packaging variants?

A: No. All MAX4544 packaging variants (Tube, Tape & Reel, Cut Tape & Digi-Reel) contain identical die and deliver identical electrical specifications. Packaging differences affect only handling, storage, and assembly processes, not component performance.

Q: How does the extended supply voltage range (2.7V ~ 12V) of MAX4544 parts affect compatibility?

A: The extended voltage range of MAX4544 parts (compared to DG9461DY's 2.7V ~ 5V) provides greater design flexibility and allows operation in systems with higher supply voltages. Designs operating within the original 2.7V ~ 5V range remain fully compatible with no circuit modifications required.

Q: What is the impact of slightly longer switch times in MAX4544 parts?

A: MAX4544 parts specify 100ns Ton and 75ns Toff compared to DG9461DY's 75ns Ton and 50ns Toff. The difference of 25ns in turn-on time and 25ns in turn-off time is negligible for most analog switching applications. High-speed applications operating near the switching time limits should evaluate circuit-level timing impact.

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