Part A
A3967SLBTR
Allegro MicroSystems
- Lifecycle
- Active
- Stock
- 5033 PCS
- Package
- SOIC-24
- Series
- PMIC - Motor Drivers, Controllers
Replacement verdict
Compatible functional replacement candidate
The A3967SLBTR and A3967SLB are functionally equivalent microstepping motor driver ICs from Allegro MicroSystems, sharing identical die specifications, electrical characteristics, and operational ratings. The only distinction is the packing format: A3967SLBTR is supplied in tape and reel for automated assembly, while A3967SLB is provided in tube packaging. For design-in and functional substitution purposes, these two part numbers are interchangeable without any circuit modification or firmware adjustment.
Package Type
High match
Electrical Characteristics
High match
Operating Temperature Range
High match
Packing Format
High match
Parts at a glance
Part B
A3967SLB
Allegro MicroSystems
- Lifecycle
- Active
- Stock
- 9415 PCS
- Package
- SOIC-24
- Series
- PMIC - Motor Drivers, Controllers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | A3967SLBTR | A3967SLB | Why it matters |
|---|---|---|---|
| Manufacturer | Allegro MicroSystems | Allegro MicroSystems | Identical manufacturer ensures the same design, process, and quality standards for both parts. |
| Product Category | Motor Driver ICs - Stepper Motor Controller | Motor Driver ICs - Stepper Motor Controller | Same functional category confirms both devices serve the same application role. |
| Package / Case | 16-PowerSOIC (0.295", 7.50mm Width) | 16-PowerSOIC (0.295", 7.50mm Width) | Identical package footprint allows drop-in replacement on the same PCB layout. |
| Mounting Type | Surface Mount | Surface Mount | Same mounting method ensures mechanical compatibility in assembly. |
| Supply Voltage Range | 4.75 V to 5.25 V (logic), 4.5 V to 30 V (motor) | 4.75 V to 5.25 V (logic), 4.5 V to 30 V (motor) | Matching voltage ranges confirm electrical compatibility in the target circuit. |
| Output Current | 750 mA per channel | 750 mA per channel | Same current rating ensures equivalent drive capability for the stepper motor load. |
| Operating Temperature Range | -20°C to +85°C | -20°C to +85°C | Identical thermal limits ensure both parts perform reliably in the same environment. |
| Control Interface | Step and Direction (translator built-in) | Step and Direction (translator built-in) | Same control interface means identical firmware and signal timing can be used. |
| Packaging / Ordering Suffix | Tape and Reel (TR) | Tube / Bulk | Different packaging affects automated assembly handling and minimum order quantities, though the die and function are identical. |
| RoHS Compliance | RoHS Compliant | RoHS Compliant | Both meet the same environmental regulations, simplifying compliance for the final product. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | A3967SLBTR | A3967SLB |
|---|---|---|
| Part Status | Obsolete | Obsolete |
| Motor Type - Stepper | Bipolar | Bipolar |
| Function | Driver - Fully Integrated, Control and Power Stage | Driver - Fully Integrated, Control and Power Stage |
| Output Configuration | Half Bridge (4) | Half Bridge (4) |
| Interface | Logic | Logic |
| Technology | Bipolar | Bipolar |
| Step Resolution | 1, 1/2, 1/4, 1/8 | 1, 1/2, 1/4, 1/8 |
| Applications | General Purpose | General Purpose |
| Current - Output | 750mA | 750mA |
| Voltage - Supply | 3V ~ 5.5V | 3V ~ 5.5V |
| Voltage - Load | 4.75V ~ 30V | 4.75V ~ 30V |
| Operating Temperature | -20°C ~ 150°C (TJ) | -20°C ~ 150°C (TJ) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between the A3967SLBTR and the A3967SLB?
The A3967SLBTR and A3967SLB are the same Allegro MicroSystems A3967 microstepping motor driver die and functionality; the suffix difference denotes packaging and shipping format. The A3967SLB is supplied in a 24-pin SOIC (SOIC-24) tube or bulk format, while the A3967SLBTR is the same device in a 24-pin SOIC supplied on tape and reel for automated assembly. Both share the same electrical specifications, pinout, and operating ratings.
Are the A3967SLBTR and A3967SLB electrically identical?
Yes. Both variants use the same A3967 silicon and are specified with identical electrical characteristics, including supply voltage range, output current capability, logic input thresholds, and internal PWM current-control behavior. The only documented difference is the carrier and packaging format, not the device parameters.
Can the A3967SLBTR be used as a drop-in replacement for the A3967SLB?
Yes, provided the PCB land pattern and assembly process accept the 24-pin SOIC package. Because both parts share the same package footprint, pinout, and electrical specifications, a board designed for the A3967SLB can accept the A3967SLBTR. The reverse is also true if the assembly process can handle tube or bulk parts instead of tape and reel.
What package do the A3967SLBTR and A3967SLB use?
Both devices are offered in a 24-pin SOIC (small outline integrated circuit) package. The A3967SLBTR is the tape-and-reel version of that same 24-pin SOIC package, while the A3967SLB is the tube or bulk version. Package dimensions and pin assignments are the same for both.
Which variant is better for automated production assembly?
The A3967SLBTR is better suited for automated production because it is supplied on tape and reel, which is compatible with pick-and-place assembly equipment. The A3967SLB in tube or bulk form is typically used for manual assembly, prototyping, or low-volume production.
Do the A3967SLBTR and A3967SLB have the same operating temperature range?
Yes. Both variants are specified over the same operating temperature range for the A3967 device family. Because they share the same die and package type, the thermal and operating temperature specifications are identical between the two ordering suffixes.
Are the A3967SLBTR and A3967SLB RoHS compliant?
Both the A3967SLBTR and A3967SLB are offered as RoHS-compliant versions by Allegro MicroSystems, with the lead-free plating and material declarations applying to the same 24-pin SOIC package. Designers should confirm the specific ordering suffix and date code against the manufacturer's current product compliance documentation before final qualification.
Which variant should be specified in a bill of materials for high-volume manufacturing?
For high-volume manufacturing, the A3967SLBTR is generally specified because tape-and-reel packaging supports automated pick-and-place assembly and reduces manual handling. The A3967SLB is more appropriate for prototyping, engineering evaluation, or low-volume builds where tube or bulk packaging is acceptable.