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DG445CJ+ Equivalent & Substitute Parts
Part Overview
The DG445CJ+ is a 4-circuit SPST-NO analog switch IC manufactured by Analog Devices Inc./Maxim Integrated, housed in a 16-DIP through-hole package. This component functions as a precision electronic switch with 85Ohm on-state resistance, designed for signal routing and multiplexing applications requiring low on-resistance and fast switching performance. The part is currently in active production status with 1094 units in stock. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and functional equivalence within the SPST switch category.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | DG445CJ+ |
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Category | Interface |
| Switch Circuit Type | SPST - NO (Single Pole Single Throw - Normally Open) |
| Number of Circuits | 4 |
| 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, 170ns |
| 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-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitution eligibility for the DG445CJ+ is determined by the following critical parameters:
Primary Substitution Criteria:
- Switch circuit topology (SPST-NO or SPST-NC)
- Number of circuits (4-circuit configuration)
- On-state resistance range (85Ohm nominal)
- Channel-to-channel matching tolerance (ΔRon ≤ 4Ohm)
- Supply voltage compatibility (10V ~ 30V single supply or ±4.5V ~ 20V dual supply)
- Package type (16-DIP through-hole)
- Switching speed performance (Ton/Toff within application requirements)
Substitute Categories:
Direct Equivalent (DG445CJ+): Identical part number and specifications. Functionally interchangeable without design modification.
Manufacturer Recommended Substitute (MAX312EPE+): Shares 4-circuit configuration, 16-DIP package, and dual supply voltage range. Differs in switch circuit type (SPST-NC vs. SPST-NO), on-state resistance (10Ohm vs. 85Ohm), and operating temperature range (-40°C ~ 85°C vs. 0°C ~ 70°C). Suitable for applications where normally-closed switching and lower on-resistance are acceptable.
Parametric Equivalent (DG442CJ+): Matches all electrical specifications and package configuration of DG445CJ+. Differs in product status (Obsolete). Functionally equivalent but subject to supply chain availability constraints.
Parameter Comparison
| Parameter | DG445CJ+ (Main) | DG445CJ+ (Direct) | MAX312EPE+ (MFR Recommended) | DG442CJ+ (Parametric Equivalent) |
|---|---|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Switch Circuit Type | SPST - NO | SPST - NO | SPST - NC | SPST - NO |
| Number of Circuits | 4 | 4 | 4 | 4 |
| On-State Resistance (Max) | 85Ohm | 85Ohm | 10Ohm | 85Ohm |
| Channel-to-Channel Matching (ΔRon) | 4Ohm (Max) | 4Ohm (Max) | 300mOhm | 4Ohm (Max) |
| Voltage - Supply, Single (V+) | 10V ~ 30V | 10V ~ 30V | 4.5V ~ 30V | 10V ~ 30V |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 20V | ±4.5V ~ 20V | ±4.5V ~ 20V | ±4.5V ~ 20V |
| Switch Time (Ton, Toff) (Max) | 250ns, 170ns | 250ns, 170ns | 225ns, 185ns | 250ns, 170ns |
| Charge Injection | 5pC | 5pC | 20pC | 5pC |
| Channel Capacitance (CS(off), CD(off)) | 4pF, 4pF | 4pF, 4pF | 15pF, 15pF | 4pF, 4pF |
| Current - Leakage (IS(off)) (Max) | 500pA | 500pA | 500pA | 500pA |
| Crosstalk | -100dB @ 1MHz | -100dB @ 1MHz | -85dB @ 1MHz | -100dB @ 1MHz |
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | -40°C ~ 85°C (TA) | 0°C ~ 70°C (TA) |
| Package / Case | 16-DIP (0.300", 7.62mm) | 16-DIP (0.300", 7.62mm) | 16-DIP (0.300", 7.62mm) | 16-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Active | Active | Active | Obsolete |
| Inventory Status | 1094 Pcs New Original In Stock | 1094 Pcs New Original In Stock | 954 Pcs New Original In Stock | 834 Pcs New Original In Stock |
Engineering Selection Recommendations
DG445CJ+ (Direct Equivalent): Primary selection for new designs and existing applications. Active product status ensures long-term availability and supply chain stability. ROHS3 compliance and MSL-1 rating support standard manufacturing processes without special handling requirements.
MAX312EPE+ (Manufacturer Recommended Substitute): Suitable for applications where normally-closed switch operation is functionally acceptable and lower on-state resistance (10Ohm) provides performance benefits. Extended operating temperature range (-40°C ~ 85°C) supports industrial and automotive environments beyond the DG445CJ+ specification. Lower channel-to-channel matching (300mOhm vs. 4Ohm) improves channel uniformity. Higher charge injection (20pC) and channel capacitance (15pF) may impact high-frequency signal integrity applications. Active product status ensures availability.
DG442CJ+ (Parametric Equivalent): Electrical specifications match DG445CJ+ identically. Obsolete product status restricts use to legacy system maintenance or applications with established supply agreements. Not recommended for new designs due to supply chain discontinuation risk.
Frequently Asked Questions (FAQ)
Q: Can MAX312EPE+ replace DG445CJ+ in all applications?
A: MAX312EPE+ shares the 4-circuit, 16-DIP package and dual supply voltage range. However, it operates as SPST-NC (normally closed) versus DG445CJ+ SPST-NO (normally open), requiring circuit logic inversion. On-state resistance differs (10Ohm vs. 85Ohm), affecting signal attenuation and power dissipation. Higher charge injection and channel capacitance may degrade performance in high-frequency or precision analog applications. Application-specific circuit analysis is required.
Q: What is the difference between DG445CJ+ and DG442CJ+?
A: DG445CJ+ and DG442CJ+ are parametrically identical in all electrical specifications and package configuration. The primary distinction is product status: DG445CJ+ is active production, while DG442CJ+ is obsolete. For new designs and ongoing production, DG445CJ+ is the specified choice. DG442CJ+ should be used only for legacy system support where supply agreements exist.
Q: Are all substitute parts compatible with 16-DIP through-hole PCB layouts?
A: Yes. DG445CJ+, MAX312EPE+, and DG442CJ+ all use 16-DIP (0.300", 7.62mm) through-hole packages with identical pin spacing and footprint. Direct PCB layout compatibility is confirmed. Pin function assignment must be verified against individual datasheets to ensure correct signal routing.
Q: What compliance certifications apply to these parts?
A: All listed parts (DG445CJ+, MAX312EPE+, DG442CJ+) are ROHS3 compliant and carry MSL-1 (Unlimited) moisture sensitivity ratings. REACH status is unaffected for all parts. ECCN classification is EAR99 for all parts. These certifications support standard manufacturing, storage, and distribution without special environmental controls.
Q: How do supply voltage ranges affect substitution?
A: DG445CJ+ and DG442CJ+ support single supply 10V ~ 30V or dual supply ±4.5V ~ 20V. MAX312EPE+ supports single supply 4.5V ~ 30V (lower minimum) or dual supply ±4.5V ~ 20V. MAX312EPE+ provides broader single-supply compatibility at lower voltages. Dual supply operation is identical across all parts. Circuit power supply design determines which part is suitable.
Q: What is the significance of on-state resistance differences?
A: DG445CJ+ and DG442CJ+ specify 85Ohm maximum on-state resistance with 4Ohm channel-to-channel matching. MAX312EPE+ specifies 10Ohm maximum on-state resistance with 300mOhm matching. Lower on-state resistance reduces signal attenuation and power dissipation in switched signal paths. Higher matching tolerance improves uniformity across multiple channels. Application signal levels and power budget determine which specification is required.
Q: Are there crosstalk performance differences?
A: DG445CJ+ and DG442CJ+ specify -100dB crosstalk at 1MHz. MAX312EPE+ specifies -85dB crosstalk at 1MHz. The 15dB difference indicates higher channel isolation in DG445CJ+ and DG442CJ+. Applications requiring high channel isolation or operating at frequencies near 1MHz should prioritize the higher crosstalk specification.
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