DG445CY Equivalent & Substitute Parts

Part Overview

The DG445CY is a 4-circuit SPST-NO IC switch manufactured by Analog Devices Inc./Maxim Integrated, designed for signal routing and switching applications requiring low on-state resistance and fast switching performance. This part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The DG445CY operates across single supply (10V to 30V) and dual supply (±4.5V to ±20V) configurations, with 85Ohm maximum on-state resistance and 250ns/170ns switching times.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NO (Single Pole Single Throw - Normally Open)
Number of Circuits	4
Multiplexer/Demultiplexer Configuration	1:1
On-State Resistance (Max)	85Ohm
Channel-to-Channel Matching (ΔRon Max)	4Ohm
Voltage - Supply, Single (V+)	10V ~ 30V
Voltage - Supply, Dual (V±)	±4.5V ~ ±20V
Switch Time - Ton (Max)	250ns
Switch Time - Toff (Max)	170ns
Charge Injection	5pC
Channel Capacitance - CS(off)	4pF
Channel Capacitance - CD(off)	4pF
Current - Leakage (IS(off) Max)	500pA
Crosstalk	-100dB @ 1MHz
Operating Temperature Range	0°C ~ 70°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the DG445CY is determined by strict equivalence across the following critical parameters:

Switch circuit topology: SPST - NO configuration
Circuit count: 4 independent circuits
Multiplexer ratio: 1:1
On-state resistance: 85Ohm maximum
Channel matching tolerance: 4Ohm maximum
Supply voltage ranges: 10V ~ 30V (single) and ±4.5V ~ ±20V (dual)
Switching performance: 250ns Ton and 170ns Toff maximums
Charge injection: 5pC
Channel capacitance: 4pF (both CS(off) and CD(off))
Leakage current: 500pA maximum
Crosstalk performance: -100dB @ 1MHz
Operating temperature: 0°C ~ 70°C
Package: 16-SOIC surface mount

The DG442CY+ meets all specified electrical and mechanical parameters, providing direct functional equivalence while offering improved product status and regulatory compliance.

Parameter Comparison

Parameter	DG445CY (Main Part)	DG442CY+ (Substitute)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Switch Circuit	SPST - NO	SPST - NO
Number of Circuits	4	4
Multiplexer/Demultiplexer Circuit	1:1	1:1
On-State Resistance (Max)	85Ohm	85Ohm
Channel-to-Channel Matching (ΔRon Max)	4Ohm	4Ohm
Voltage - Supply, Single (V+)	10V ~ 30V	10V ~ 30V
Voltage - Supply, Dual (V±)	±4.5V ~ ±20V	±4.5V ~ ±20V
Switch Time - Ton (Max)	250ns	250ns
Switch Time - Toff (Max)	170ns	170ns
Charge Injection	5pC	5pC
Channel Capacitance - CS(off)	4pF	4pF
Channel Capacitance - CD(off)	4pF	4pF
Current - Leakage (IS(off) Max)	500pA	500pA
Crosstalk	-100dB @ 1MHz	-100dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The DG442CY+ is the direct substitute for the obsolete DG445CY. Both components are manufactured by Analog Devices Inc./Maxim Integrated and provide identical electrical performance across all specified parameters. The primary distinction is product lifecycle status: the DG445CY is obsolete, while the DG442CY+ maintains active production status.

The DG442CY+ offers improved regulatory compliance, meeting ROHS3 requirements compared to the non-compliant status of the DG445CY. Both components maintain REACH Unaffected classification and identical ECCN/HTSUS coding. The DG442CY+ is supplied in tube packaging, consistent with standard production practices for active components.

For new designs or production continuity, the DG442CY+ is the appropriate selection. Existing designs using the DG445CY can transition to the DG442CY+ without circuit modification, as all electrical and mechanical parameters remain equivalent.

Frequently Asked Questions (FAQ)

Q: Can the DG442CY+ directly replace the DG445CY in existing designs?

A: Yes. The DG442CY+ provides identical electrical performance and mechanical compatibility. Both components feature 4 SPST-NO circuits, 85Ohm on-state resistance, matching supply voltage ranges, and identical switching characteristics. The 16-SOIC package dimensions and surface mount configuration are identical.

Q: What is the primary reason for substitution?

A: The DG445CY is classified as obsolete. The DG442CY+ is an active product from the same manufacturer, ensuring continued availability and production support.

Q: Are there compliance differences between these parts?

A: The DG442CY+ meets ROHS3 compliance requirements, while the DG445CY is RoHS non-compliant. Both maintain REACH Unaffected status. For applications subject to RoHS regulations, the DG442CY+ is the required selection.

Q: Is circuit board layout modification required for substitution?

A: No. Both components use identical 16-SOIC packaging with 0.154" width and 3.90mm dimensions. Footprint and pinout compatibility are maintained.

Q: Are the electrical performance characteristics identical?

A: Yes. On-state resistance (85Ohm max), channel matching (4Ohm max), switching times (250ns/170ns), charge injection (5pC), capacitance (4pF), leakage current (500pA), and crosstalk performance (-100dB @ 1MHz) are identical across both components.

Q: What supply voltage configurations are supported?

A: Both components support single supply operation (10V ~ 30V) and dual supply operation (±4.5V ~ ±20V), with identical voltage specifications.

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