SLA7073MR Equivalent & Substitute Parts

Part Overview

The SLA7073MR is a unipolar motor driver IC manufactured by Sanken Electric USA Inc., designed for stepper motor applications with integrated control and power stages. This through-hole component operates across a 3V to 5.5V supply range with a 10V to 44V load voltage capability and delivers 3A output current. The part is currently obsolete, making equivalent substitutes necessary for new designs or production continuity. Alternatives must maintain functional compatibility across motor control applications while meeting electrical and mechanical specifications.

Substiute Parts

SLA7073MR

Sanken Electric USA Inc.In Stock: 11712SLA7073MR Datasheet

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SLA7073MPRT

Sanken Electric USA Inc.In Stock: 2081SLA7073MPRT Datasheet

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DRV8870DDA

Texas InstrumentsIn Stock: 496733DRV8870DDA Datasheet

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DRV8870DDAR

Texas InstrumentsIn Stock: 132903DRV8870DDAR Datasheet

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DRV8872DDA

Texas InstrumentsIn Stock: 3339DRV8872DDA Datasheet

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DRV8872DDAR

Texas InstrumentsIn Stock: 17175DRV8872DDAR Datasheet

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DRV8872DDARQ1

Texas InstrumentsIn Stock: 19404DRV8872DDARQ1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the SLA7073MR is based on the following critical parameters:

Primary Compatibility Criteria:

• Motor Type - Stepper: Unipolar (required)
• Function: Driver - Fully Integrated, Control and Power Stage (required)
• Current - Output: 3A minimum (3.6A acceptable for higher capability)
• Voltage - Supply: 3V ~ 5.5V range (0V ~ 5.5V acceptable for broader compatibility)
• Voltage - Load: 10V ~ 44V range (6.5V ~ 45V acceptable for extended range)
• Operating Temperature: -20°C ~ 150°C minimum (extended to -40°C acceptable)
• RoHS Compliance: Required

Substitute Categories:

Category 1: Direct Sanken Equivalent

• SLA7073MPRT: Identical electrical specifications, same manufacturer, active product status, differs only in packaging (Tube vs. standard)

Category 2: Texas Instruments NMOS PWM Drivers

• DRV8870DDA, DRV8870DDAR, DRV8872DDA, DRV8872DDAR, DRV8872DDARQ1: These parts support unipolar stepper motor operation with integrated control and power stages. Output configuration differs (Half Bridge vs. Low Side), interface differs (PWM vs. Parallel), and mounting type differs (Surface Mount vs. Through Hole). These represent functional alternatives with different implementation architectures.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Through-Hole, Parallel Interface): SLA7073MPRT is the primary substitute for the obsolete SLA7073MR. Both parts are manufactured by Sanken Electric USA Inc. with identical electrical specifications, unipolar stepper motor support, parallel interface, and low-side output configuration. The SLA7073MPRT maintains active product status and ROHS3 compliance. Packaging differs (Tube vs. standard), but electrical and mechanical form factors are identical. This part requires no circuit redesign.

For Functional Alternatives (Surface Mount, PWM Interface): The Texas Instruments DRV8870 and DRV8872 series (DRV8870DDA, DRV8870DDAR, DRV8872DDA, DRV8872DDAR, DRV8872DDARQ1) provide unipolar stepper motor driver functionality with integrated control and power stages. These parts operate within compatible voltage ranges and deliver 3.6A output current. Key differences include surface-mount packaging, PWM interface instead of parallel control, and half-bridge output configuration instead of low-side. These alternatives require circuit redesign and PCB layout modifications. All Texas Instruments variants maintain active product status and ROHS3 compliance.

For Automotive Applications: DRV8872DDARQ1 is qualified to AEC-Q100 automotive standards with Automotive grade designation. This variant is suitable for automotive motor control applications requiring formal qualification documentation.

Frequently Asked Questions (FAQ)

Q: Can SLA7073MPRT be used as a direct drop-in replacement for SLA7073MR? A: Yes. SLA7073MPRT is electrically and mechanically identical to SLA7073MR. Both support unipolar stepper motors with parallel interface, low-side output configuration, and identical voltage/current specifications. The only difference is packaging format (Tube). No circuit modifications are required.

Q: What are the key differences between the Sanken SLA7073MPRT and Texas Instruments DRV8870/DRV8872 series? A: The primary differences are: (1) Mounting type: SLA7073MPRT is through-hole; DRV8870/DRV8872 are surface-mount; (2) Interface: SLA7073MPRT uses parallel control; DRV8870/DRV8872 use PWM; (3) Output configuration: SLA7073MPRT provides low-side (4) outputs; DRV8870/DRV8872 provide half-bridge (2) outputs. These differences require circuit redesign if switching to Texas Instruments parts.

Q: Are all substitute parts RoHS compliant? A: Yes. SLA7073MPRT is ROHS3 compliant. All Texas Instruments variants (DRV8870DDA, DRV8870DDAR, DRV8872DDA, DRV8872DDAR, DRV8872DDARQ1) are ROHS3 compliant.

Q: What is the difference between DRV8872DDAR and DRV8872DDARQ1? A: Both parts are electrically equivalent with 3.6A output current and identical voltage ranges. DRV8872DDARQ1 includes automotive qualification (AEC-Q100) and Automotive grade designation, making it suitable for automotive applications. DRV8872DDARQ1 has higher moisture sensitivity (MSL 3 vs. MSL 2) and a slightly higher minimum load voltage (6.8V vs. 6.5V).

Q: Can I use a surface-mount DRV8870/DRV8872 in a through-hole application? A: No. Surface-mount packages require different PCB footprints and assembly processes than through-hole components. If your application requires through-hole mounting, use SLA7073MPRT. Surface-mount alternatives require PCB redesign.

Q: What inventory levels are available for each substitute? A: SLA7073MPRT: 2,000 pcs. DRV8870DDA: 496,708 pcs. DRV8870DDAR: 132,850 pcs. DRV8872DDA: 3,300 pcs. DRV8872DDAR: 17,127 pcs. DRV8872DDARQ1: 19,300 pcs.