Part A
A3966SLBTR-T
Allegro MicroSystems
- Lifecycle
- Active
- Stock
- 7796 Stückzahl
- Package
- SOIC-16
- Series
- PMIC Motor Treiber, Controller
Replacement verdict
Compatible functional replacement candidate
The A3966SLBTR-T and A3966SLBTR are functionally equivalent dual full-bridge PWM motor drivers from Allegro MicroSystems, sharing identical silicon design, electrical ratings, and package footprint. The A3966SLBTR-T suffix denotes tape-and-reel packaging orientation, making it a direct drop-in replacement for the A3966SLBTR in automated assembly processes with no electrical or mechanical redesign required.
Output Current Rating
High match
Supply Voltage Range
High match
Package Type
High match
Operating Temperature Range
High match
Parts at a glance
Part B
A3966SLBTR
Allegro MicroSystems
- Lifecycle
- Active
- Stock
- 5756 Stückzahl
- Package
- SOIC-16
- 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 | A3966SLBTR-T | A3966SLBTR | Why it matters |
|---|---|---|---|
| Manufacturer | Allegro MicroSystems | Allegro MicroSystems | Same manufacturer ensures consistent design, documentation, and quality standards. |
| Motor Type - Stepper | Bipolar | Bipolar | Both devices drive the same type of stepper motor, ensuring functional interchangeability. |
| Output Configuration | Half Bridge (2) | Half Bridge (2) | Identical output topology means the same load wiring and drive scheme can be used. |
| Supply Voltage Range | 4.75V to 5.25V | 4.75V to 5.25V | Matching logic supply requirements allows the same power rail design for both parts. |
| Output Current per Channel | 750mA | 750mA | Equal current rating ensures the same motor torque capability and thermal design. |
| Operating Temperature Range | -20°C to 85°C | -20°C to 85°C | Same temperature range means both parts suit the same application environments. |
| Package / Case | 16-PowerSOIC (0.295", 7.50mm Width) | 16-PowerSOIC (0.295", 7.50mm Width) | Identical footprint allows drop-in PCB replacement without layout changes. |
| Mounting Type | Surface Mount | Surface Mount | Same mounting method ensures assembly process compatibility. |
| Interface | Parallel | Parallel | Matching control interface means the same microcontroller signals can drive either device. |
| Packaging | Tape & Reel | Tape & Reel | Same packaging supports identical automated pick-and-place assembly handling. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | A3966SLBTR-T | A3966SLBTR |
|---|---|---|
| Part Status | Active | 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 | Parallel | Parallel |
| Technology | Bipolar | Bipolar |
| Applications | General Purpose | General Purpose |
| Current - Output | 650mA | 650mA |
| Voltage - Supply | 4.75V ~ 5.5V | 4.75V ~ 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 A3966SLBTR-T and A3966SLBTR?
The A3966SLBTR-T and A3966SLBTR are both dual full-bridge motor driver ICs from Allegro MicroSystems. The "-T" suffix indicates tape and reel packaging, while the base part number A3966SLBTR may refer to the same device in a different packaging or ordering configuration. Both share the same electrical specifications and functionality.
Are A3966SLBTR-T and A3966SLBTR electrically identical?
Yes, both devices are based on the same A3966 die and have identical electrical characteristics, including output current rating, supply voltage range, and logic input thresholds. The difference is limited to packaging and ordering designation.
What is the output current capability of the A3966?
The A3966 is rated for a continuous output current of up to 650 mA per bridge and 1.2 A peak per bridge, depending on the thermal conditions and PCB layout. These ratings are specified in the Allegro MicroSystems datasheet.
What is the supply voltage range for the A3966?
The A3966 operates with a motor supply voltage (VM) range of 4.75 V to 30 V and a logic supply voltage (VCC) range of 4.75 V to 5.25 V, as specified in the manufacturer datasheet.
Can A3966SLBTR-T and A3966SLBTR be used interchangeably in a design?
Yes, because both share the same die, electrical parameters, and pinout. The only difference is the packaging suffix, so they are interchangeable provided the physical package and reel orientation meet the assembly requirements.
What package type do A3966SLBTR-T and A3966SLBTR use?
Both devices are offered in a 16-pin SOIC (small outline integrated circuit) package with a nominal body width of 3.90 mm, designated as the "LB" package by Allegro MicroSystems.
What is the operating temperature range for the A3966?
The A3966 is specified for an operating ambient temperature range of -20°C to +85°C, as stated in the Allegro MicroSystems datasheet.
Does the "-T" suffix affect the moisture sensitivity level (MSL) of the A3966SLBTR-T?
The "-T" suffix denotes tape and reel packaging and does not change the moisture sensitivity level. Both A3966SLBTR-T and A3966SLBTR are classified with the same MSL rating as specified in the manufacturer's packaging documentation.