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DG408MY/PR Equivalent & Substitute Parts
Part Overview
The DG408MY/PR is a single-circuit 8:1 analog multiplexer manufactured by Analog Devices Inc./Maxim Integrated, designed for signal routing and switching applications in analog systems. This component features an on-state resistance of 100Ohm with low channel-to-channel matching variation, making it suitable for precision signal conditioning and data acquisition systems. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure long-term component availability for new production runs and system maintenance.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Multiplexer Configuration | 8:1 |
| Number of Circuits | 1 |
| On-State Resistance (Max) | 100Ohm |
| Channel-to-Channel Matching (ΔRon) | 1.5Ohm |
| Supply Voltage - Single (V+) | 5V ~ 30V |
| Supply Voltage - Dual (V±) | ±5V ~ 20V |
| Switch Time (Ton, Toff) Max | 150ns, 150ns |
| Charge Injection | 2pC |
| Channel Capacitance (CS(off), CD(off)) | 3pF, 26pF |
| Current - Leakage (IS(off)) Max | 500pA |
| Crosstalk | -92dB @ 100kHz |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
Substitute Part Grouping Explanation
Substitution of the DG408MY/PR is determined by strict equivalence across the following critical parameters:
- Multiplexer Configuration: Must be 8:1 topology
- Circuit Count: Must be single circuit (1)
- On-State Resistance: Must be 100Ohm maximum
- Package Type: Must be 16-SOIC surface mount
- Supply Voltage Compatibility: Must support 5V ~ 30V single supply or ±5V ~ 20V dual supply operation
- Operating Temperature Range: Must cover -55°C ~ 125°C minimum
- Base Product Number: DG408 series designation
The DG408MY/PR+ qualifies as a direct substitute based on identical electrical specifications, matching package configuration, and compatible supply voltage requirements. The primary distinction is product status: the original part is obsolete, while the substitute is active in production.
Parameter Comparison
| Parameter | DG408MY/PR (Main) | DG408MY/PR+ (Substitute) |
|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Category | Interface | Interface |
| Multiplexer Configuration | 8:1 | 8:1 |
| Number of Circuits | 1 | 1 |
| On-State Resistance (Max) | 100Ohm | 100Ohm |
| Channel-to-Channel Matching (ΔRon) | 1.5Ohm | 1.5Ohm |
| Supply Voltage - Single (V+) | 5V ~ 30V | 5V ~ 30V |
| Supply Voltage - Dual (V±) | ±5V ~ 20V | ±5V ~ 20V |
| Switch Time (Ton, Toff) Max | 150ns, 150ns | 150ns, 150ns |
| Charge Injection | 2pC | 2pC |
| Channel Capacitance (CS(off), CD(off)) | 3pF, 26pF | 3pF, 26pF |
| Current - Leakage (IS(off)) Max | 500pA | 500pA |
| Crosstalk | -92dB @ 100kHz | -92dB @ 100kHz |
| Operating Temperature | -55°C ~ 125°C (TA) | -55°C ~ 125°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 | RoHS non-compliant | ROHS3 Compliant |
Engineering Selection Recommendations
The DG408MY/PR+ is a direct functional equivalent to the DG408MY/PR with identical electrical and mechanical specifications. Selection of the substitute part is justified by the following factors:
- Product Status: The original DG408MY/PR is obsolete, limiting availability for new production and long-term supply chain continuity. The DG408MY/PR+ maintains active production status.
- Regulatory Compliance: The DG408MY/PR+ achieves ROHS3 compliance, meeting current environmental and regulatory requirements for electronic components in most jurisdictions.
- Electrical Equivalence: All critical parameters including multiplexer configuration, on-state resistance, supply voltage ranges, switching characteristics, and operating temperature range are identical.
- Package Compatibility: Both parts use identical 16-SOIC surface mount packaging, ensuring direct PCB layout compatibility without redesign.
- Manufacturer Continuity: Both parts are manufactured by Analog Devices Inc./Maxim Integrated, ensuring consistent quality and performance standards.
Frequently Asked Questions (FAQ)
Q: Can the DG408MY/PR+ be used as a direct replacement for the DG408MY/PR without circuit modifications?
A: Yes. The DG408MY/PR+ is electrically and mechanically equivalent. All electrical parameters, supply voltage requirements, switching characteristics, and package dimensions are identical. No circuit modifications are required for substitution.
Q: Are there any differences in pin configuration between these parts?
A: No. Both parts use the 16-SOIC package with identical pin assignments. PCB layouts designed for the DG408MY/PR require no modification for the DG408MY/PR+.
Q: What is the significance of the RoHS compliance difference?
A: The DG408MY/PR+ is ROHS3 compliant, meeting current environmental regulations for lead-free and restricted substance requirements. The original DG408MY/PR is RoHS non-compliant. For new designs and production runs, the compliant substitute is the appropriate selection.
Q: Are the supply voltage specifications identical?
A: Yes. Both parts support single supply operation from 5V to 30V and dual supply operation from ±5V to ±20V. Existing power supply designs require no modification.
Q: Is the switching performance identical between these parts?
A: Yes. Both parts have identical switch times (150ns maximum for both Ton and Toff), charge injection (2pC), and crosstalk performance (-92dB @ 100kHz). Signal integrity characteristics are equivalent.
Q: What is the operating temperature range for both parts?
A: Both parts operate across -55°C to 125°C (TA), providing identical thermal performance specifications for industrial and extended temperature applications.
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