Part A
A3967SLBTR
Allegro MicroSystems
- Lifecycle
- Active
- Stock
- 5033 Stückzahl
- Package
- SOIC-24
- Series
- PMIC Motor Treiber, Controller
Replacement verdict
Compatible functional replacement candidate
The A3967SLBTR-T and A3967SLBTR are functionally equivalent microstepping motor driver ICs from Allegro MicroSystems, sharing the same die, electrical characteristics, and package family. The A3967SLBTR-T suffix denotes tape-and-reel packaging with lead-free (RoHS-compliant) construction, while the A3967SLBTR is the standard tape-and-reel variant. Both devices are drop-in compatible in terms of function, pinout, and electrical performance; the only meaningful distinction is the environmental compliance and packaging designation. Designers should confirm solder profile and RoHS requirements before substituting, but no circuit redesign is necessary.
Function and Output Type
High match
Pinout and Package Type
High match
Electrical Ratings
High match
Environmental Compliance
Validation required
Parts at a glance
Part B
A3967SLBTR-T
Allegro MicroSystems
- Lifecycle
- Active
- Stock
- 2159 Stückzahl
- Package
- SOIC-24
- Series
- PMIC Motor Treiber, Controller
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-T | A3967SLBTR | Why it matters |
|---|---|---|---|
| Manufacturer | Allegro MicroSystems | Allegro MicroSystems | Same manufacturer ensures consistent design, documentation, and quality standards. |
| Product Category | Motor / Motion / Ignition Controllers & Drivers | Motor / Motion / Ignition Controllers & Drivers | Confirms both parts serve the same functional role in a circuit. |
| Motor Type | Stepper | Stepper | Both devices must drive the same motor type to be functionally interchangeable. |
| Output Current | 750 mA | 750 mA | Current rating determines the maximum load the driver can handle. |
| Supply Voltage Range | 4.75 V to 5.25 V | 4.75 V to 5.25 V | The logic supply voltage must match the system rail for proper operation. |
| Mounting Style | SMD/SMT | SMD/SMT | Mounting style must match the PCB footprint for physical compatibility. |
| Package / Case | SOIC-24 | SOIC-24 | Same package ensures the part fits the same land pattern on the board. |
| Packaging | Tape & Reel (TR) | Tape & Reel (TR) | Packaging form affects assembly line feeding and inventory handling. |
| Operating Temperature Range | -20°C to +85°C | -20°C to +85°C | Thermal limits must satisfy the application's environmental conditions. |
| RoHS Compliance | Compliant | Compliant | RoHS status affects regulatory compliance for product shipments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | A3967SLBTR | A3967SLBTR-T |
|---|---|---|
| Part Status | Obsolete | Active |
| 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 A3967SLBTR-T and A3967SLBTR?
The A3967SLBTR-T and A3967SLBTR are both Allegro MicroSystems A3967 microstepping motor driver ICs in a 16-pin SOIC package. The "-T" suffix indicates tape and reel packaging, while the non-suffixed A3967SLBTR may also be supplied in tape and reel depending on the manufacturer's ordering nomenclature. The core electrical and functional specifications are identical; the difference is primarily the ordering and packaging designation.
Are the A3967SLBTR-T and A3967SLBTR electrically identical?
Yes. Both devices share the same datasheet specifications: 30 V maximum supply voltage, 750 mA maximum output current per channel, 3.0 V to 5.5 V logic supply, and internal PWM current control with microstepping up to 1/8 step. The "-T" suffix does not alter the electrical characteristics.
Can A3967SLBTR-T and A3967SLBTR be used interchangeably in a design?
Yes, provided the physical package and pinout are the same. Both are offered in the same 16-pin SOIC (suffix "LB") package with identical pin functions. Designers should verify the exact orderable part number and packaging option against the manufacturer's datasheet and the assembly requirements.
What is the function of the A3967SLBTR-T and A3967SLBTR?
Both are complete microstepping motor driver ICs with built-in translator and current control. They are designed to drive bipolar stepper motors in full-step, half-step, quarter-step, and eighth-step modes, and include internal PWM current regulation, fixed off-time, and thermal shutdown protection.
What are the key absolute maximum ratings for the A3967SLBTR-T and A3967SLBTR?
Per the Allegro A3967 datasheet, the absolute maximum supply voltage (VBB) is 30 V, logic supply voltage (VCC) is 7 V, output current per channel is 750 mA, and the operating junction temperature range is -20°C to +150°C. These ratings apply equally to both part numbers.
Do the A3967SLBTR-T and A3967SLBTR require external components for operation?
Yes. Both devices require external components including a current-sense resistor (RS) for each H-bridge, a reference voltage input, and decoupling capacitors on VBB and VCC. The datasheet provides recommended values and application circuits that apply to both part numbers.
Which package do the A3967SLBTR-T and A3967SLBTR use?
Both use the Allegro "LB" package, which is a 16-pin SOIC with a 0.300-inch body width. The thermal and PCB land pattern requirements are identical for both orderable part numbers.
Are the A3967SLBTR-T and A3967SLBTR RoHS compliant?
Allegro MicroSystems typically designates lead-free, RoHS-compliant parts with a "-T" suffix. The A3967SLBTR-T is RoHS compliant. The A3967SLBTR may be an older non-RoHS or lead-containing version depending on the manufacturer's historical nomenclature. Designers should confirm RoHS status from the current manufacturer datasheet or product page before use.