DG445CY+ Equivalent & Substitute Parts

Part Overview

The DG445CY+ is a 4-circuit IC switch with SPST-NO configuration, designed for signal routing and switching applications requiring low on-state resistance and fast switching times. Manufactured by Analog Devices Inc./Maxim Integrated, this component operates across single supply (10V to 30V) and dual supply (±4.5V to ±20V) ranges with 85Ohm maximum on-state resistance per channel.

The DG445CY+ is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for systems currently utilizing this component.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SPST - NO (Single Pole Single Throw - Normally Open)
Number of Circuits	4
Multiplexer/Demultiplexer Circuit	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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the DG445CY+ is determined by strict equivalence across the following critical parameters:

Switch Circuit Type: SPST - NO configuration with 4 independent circuits
On-State Resistance: Maximum 85Ohm per channel with ΔRon matching of 4Ohm maximum
Supply Voltage Compatibility: Single supply 10V to 30V and dual supply ±4.5V to ±20V
Switching Performance: Ton ≤ 250ns and Toff ≤ 170ns
Signal Integrity Specifications: Charge injection 5pC, crosstalk -100dB @ 1MHz
Package Compatibility: 16-SOIC surface mount package with identical pinout
Compliance Requirements: ROHS3 compliance and MSL Level 1

Substitute parts must match all electrical parameters and physical package specifications to ensure direct replacement without circuit redesign or PCB modification.

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 Range	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
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The DG442CY+ is the manufacturer-recommended substitute for the obsolete DG445CY+. Both components are manufactured by Analog Devices Inc./Maxim Integrated and share identical electrical specifications and package configurations.

The DG442CY+ offers the advantage of active product status, ensuring continued availability and manufacturer support. Both parts maintain ROHS3 compliance and MSL Level 1 rating, meeting environmental and reliability requirements for industrial and commercial applications.

Selection of the DG442CY+ as a replacement for the DG445CY+ requires no circuit modifications, PCB layout changes, or firmware adjustments. The components are pin-compatible and functionally equivalent across all specified operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the DG442CY+ directly replace the DG445CY+ without PCB modifications?

A: Yes. The DG442CY+ is electrically and mechanically equivalent to the DG445CY+. Both components use the 16-SOIC package with identical pinout, supply voltage ranges, switching characteristics, and signal integrity specifications. Direct substitution on existing PCBs is supported.

Q: What is the primary reason for substituting the DG445CY+?

A: The DG445CY+ is classified as obsolete. The DG442CY+ is the active equivalent part, ensuring long-term supply chain availability and manufacturer support for new designs and production continuity.

Q: Are there any compliance or certification differences between the DG445CY+ and DG442CY+?

A: No. Both parts are ROHS3 compliant and carry MSL Level 1 rating. Compliance certifications and environmental qualifications are identical.

Q: What packaging options are available for the DG442CY+?

A: The DG442CY+ is supplied in Tube packaging. The 16-SOIC surface mount package dimensions and pinout are identical to the DG445CY+.

Q: Are the electrical performance characteristics identical between these parts?

A: Yes. On-state resistance, switching times, charge injection, crosstalk, leakage current, and all other specified electrical parameters are identical. Both parts operate across the same supply voltage ranges and temperature range (0°C to 70°C).

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