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DG444CY Equivalent & Substitute Parts
Part Overview
The DG444CY is a 4-circuit SPST-NC (Single Pole Single Throw - Normally Closed) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated in a 16-SOIC surface mount package. This part operates as a 1:1 multiplexer/demultiplexer with 85Ohm on-state resistance and is designed for signal switching applications requiring low on-resistance and fast switching times.
The DG444CY is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and leverage improved performance characteristics or compliance standards offered by active alternatives.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Switch Circuit Configuration | SPST - NC (Single Pole Single Throw - Normally Closed) |
| Number of Circuits | 4 |
| Multiplexer/Demultiplexer Circuit | 1:1 |
| On-State Resistance (Max) | 85Ohm |
| Channel-to-Channel Matching (ΔRon) | 4Ohm (Max) |
| Voltage - Supply, Single (V+) | 10V ~ 30V |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 20V |
| Switch Time (Ton, Toff) (Max) | 250ns, 140ns |
| Charge Injection | 5pC |
| Channel Capacitance (CS(off), CD(off)) | 4pF, 4pF |
| Current - Leakage (IS(off)) (Max) | 500pA |
| Crosstalk | -100dB @ 1MHz |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Package / Case | 16-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 DG444CY is determined by the following critical parameters:
- Switch Circuit Configuration: Must be SPST - NC with 4 circuits in 1:1 multiplexer/demultiplexer topology
- On-State Resistance: Acceptable range is 70Ohm to 85Ohm maximum
- Package / Case: Must be 16-SOIC (0.154", 3.90mm Width) for mechanical and electrical compatibility
- Mounting Type: Surface mount only
- Supply Voltage Compatibility: Substitute must support the application's required voltage range
- Leakage Current: Maximum 500pA
- Crosstalk Performance: -95dB or better
Substitute parts are grouped into two categories:
Category 1 - Direct Equivalents (85Ohm On-State Resistance) Parts maintaining the exact 85Ohm on-state resistance specification with improved product status and compliance.
Category 2 - Performance Upgrades (70Ohm to 80Ohm On-State Resistance) Parts offering lower on-state resistance, faster switching times, and extended temperature ranges, suitable for applications where improved performance is beneficial.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Ron (Max) Ohm | V+ Range | V± Range | Ton/Toff (Max) ns | Operating Temp °C | RoHS Status | Packaging |
|---|---|---|---|---|---|---|---|---|---|
| DG444CY | Analog Devices Inc./Maxim Integrated | Obsolete | 85 | 10V ~ 30V | ±4.5V ~ 20V | 250, 140 | 0°C ~ 70°C | RoHS non-compliant | Tube |
| DG444CY+ | Analog Devices Inc./Maxim Integrated | Active | 85 | 10V ~ 30V | ±4.5V ~ 20V | 250, 140 | 0°C ~ 70°C | ROHS3 Compliant | Tube |
| ADG444BRZ | Analog Devices Inc. | Active | 70 | 12V | ±15V | 110, 60 | -40°C ~ 85°C | ROHS3 Compliant | Tube |
| ADG444BRZ-REEL | Analog Devices Inc. | Active | 70 | 12V | ±15V | 110, 60 | -40°C ~ 85°C | ROHS3 Compliant | Cut Tape (CT) & Digi-Reel® |
| DG441DY-E3 | Vishay Siliconix | Active | 85 | 12V | ±15V | 220, 120 | -40°C ~ 85°C | ROHS3 Compliant | Tube |
| DG441DY-T1-E3 | Vishay Siliconix | Active | 85 | 12V | ±15V | 220, 120 | -40°C ~ 85°C | ROHS3 Compliant | Tape & Reel (TR) |
| DG444BDY-E3 | Vishay Siliconix | Active | 80 | 13V ~ 36V | ±7V ~ 22V | 300, 200 | -40°C ~ 85°C | ROHS3 Compliant | Tube |
| DG444BDY-T1-E3 | Vishay Siliconix | Active | 80 | 13V ~ 36V | ±7V ~ 22V | 300, 200 | -40°C ~ 85°C | ROHS3 Compliant | Tape & Reel (TR) |
| DG444DY-E3 | Vishay Siliconix | Active | 85 | 5V ~ 36V | ±5V ~ 20V | 250, 140 | -40°C ~ 85°C | ROHS3 Compliant | Tube |
| DG444DY-T1-E3 | Vishay Siliconix | Active | 85 | 5V ~ 36V | ±5V ~ 20V | 250, 140 | -40°C ~ 85°C | ROHS3 Compliant | Cut Tape (CT) & Digi-Reel® |
| DG444DYZ | Renesas Electronics Corporation | Active | 85 | 5V ~ 34V | ±5V ~ 22V | 250, 140 | -40°C ~ 85°C | ROHS3 Compliant | Tube |
Engineering Selection Recommendations
For Direct Replacement with Improved Compliance:
DG444CY+ is the primary direct substitute. It maintains identical electrical specifications and packaging as the DG444CY while achieving ROHS3 compliance and active product status. This part is suitable for applications where the original supply voltage range (10V ~ 30V single supply, ±4.5V ~ 20V dual supply) and operating temperature (0°C ~ 70°C) are sufficient.
For Extended Temperature Range Applications:
DG444DY-E3, DG444DY-T1-E3, and DG444DYZ provide extended operating temperature range (-40°C ~ 85°C) while maintaining 85Ohm on-state resistance and identical switching characteristics. DG444DY-E3 and DG444DY-T1-E3 are Vishay Siliconix products; DG444DYZ is manufactured by Renesas Electronics Corporation. All three are ROHS3 compliant and active. DG444DY-E3 and DG444DYZ support wider supply voltage ranges (5V ~ 36V and 5V ~ 34V respectively) compared to the original DG444CY.
For Tape & Reel Packaging:
DG444DY-T1-E3 offers the same electrical performance as DG444DY-E3 in Cut Tape & Digi-Reel® packaging, suitable for automated assembly processes.
For Performance-Enhanced Applications:
ADG444BRZ and ADG444BRZ-REEL offer reduced on-state resistance (70Ohm) and faster switching times (110ns/60ns vs. 250ns/140ns). These parts support fixed supply voltages (12V single, ±15V dual) and extended temperature range (-40°C ~ 85°C). ADG444BRZ-REEL is supplied in Cut Tape & Digi-Reel® packaging.
For Intermediate On-State Resistance:
DG444BDY-E3 and DG444BDY-T1-E3 provide 80Ohm on-state resistance with extended supply voltage range (13V ~ 36V single, ±7V ~ 22V dual) and extended temperature range (-40°C ~ 85°C). DG444BDY-T1-E3 is available in Tape & Reel packaging.
For Alternative Manufacturer Source:
DG441DY-E3 and DG441DY-T1-E3 (Vishay Siliconix) maintain 85Ohm on-state resistance and are ROHS3 compliant with active status. These parts support fixed supply voltages (12V single, ±15V dual) and extended temperature range (-40°C ~ 85°C). DG441DY-T1-E3 is supplied in Tape & Reel packaging.
Frequently Asked Questions (FAQ)
Q: Can DG444CY+ be used as a direct replacement for DG444CY?
A: Yes. DG444CY+ is electrically and mechanically identical to DG444CY, with the addition of ROHS3 compliance and active product status. It operates within the same supply voltage ranges (10V ~ 30V single, ±4.5V ~ 20V dual) and temperature range (0°C ~ 70°C).
Q: What is the difference between DG444DY-E3 and DG444DY-T1-E3?
A: Both parts are electrically identical with 85Ohm on-state resistance and identical switching characteristics. The difference is packaging: DG444DY-E3 is supplied in Tube packaging, while DG444DY-T1-E3 is supplied in Cut Tape & Digi-Reel® packaging for automated assembly.
Q: Can ADG444BRZ replace DG444CY in all applications?
A: ADG444BRZ is electrically compatible but with important differences. It offers lower on-state resistance (70Ohm vs. 85Ohm) and faster switching times (110ns/60ns vs. 250ns/140ns). However, it operates at fixed supply voltages (12V single, ±15V dual) rather than the DG444CY's variable ranges. Verify supply voltage compatibility before substitution.
Q: What is the advantage of DG444BDY-E3 over DG444CY?
A: DG444BDY-E3 provides extended supply voltage range (13V ~ 36V single, ±7V ~ 22V dual) and extended operating temperature range (-40°C ~ 85°C) compared to DG444CY. On-state resistance is 80Ohm, which is within acceptable substitution limits. This part is suitable for applications requiring wider voltage and temperature operating margins.
Q: Are all substitute parts ROHS3 compliant?
A: All substitute parts listed are ROHS3 compliant. The original DG444CY is RoHS non-compliant. Compliance is a key advantage of all active alternatives.
Q: Can I use DG444DYZ as a substitute if I need Renesas sourcing?
A: Yes. DG444DYZ is manufactured by Renesas Electronics Corporation and maintains 85Ohm on-state resistance with identical switching characteristics to DG444CY. It supports extended supply voltage range (5V ~ 34V single, ±5V ~ 22V dual) and extended operating temperature range (-40°C ~ 85°C). It is ROHS3 compliant and active.
Q: What packaging options are available for extended temperature range parts?
A: DG444DY-E3 is available in Tube packaging. DG444DY-T1-E3 is available in Cut Tape & Digi-Reel® packaging. Both offer identical electrical performance with -40°C ~ 85°C operating temperature range.
Q: Is the 16-SOIC package identical across all substitute parts?
A: Yes. All substitute parts use the 16-SOIC package (0.154", 3.90mm Width) with surface mount configuration, ensuring mechanical and PCB layout compatibility with DG444CY designs.
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