The Tic T249 USB Multi-Interface Stepper Motor Controller makes basic control of a stepper motor easy, with quick configuration over USB using our free software.
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The Tic family of stepper motor controllers makes it easy to add basic control of a bipolar stepper motor to a variety of projects. These versatile, general-purpose modules support six different control interfaces: USB for direct connection to a computer, TTL serial and I²C for use with a microcontroller, RC hobby servo pulses for use in an RC system, analog voltages for use with a potentiometer or analog joystick, and quadrature encoder for use with a rotary encoder dial. They also offer many settings that can be configured using our free configuration utility (for Windows, Linux, and macOS). This software simplifies initial setup of the device and allows for in-system testing and monitoring of the controller via USB (a micro-B USB cable is required to connect the Tic to a computer).
The table below lists the members of the Tic family and shows the key differences among them.
 Tic T500 |
 Tic T834 |
 Tic T825 |
 Tic T249 |
|
|---|---|---|---|---|
| Operating voltage range: | 4.5 V to 35 V(1) | 2.5 V to 10.8 V | 8.5 V to 45 V(1) | 10 V to 47 V(1) |
| Max continuous current per phase (no additional cooling): |
1.5 A | 1.5 A | 1.5 A | 1.8 A |
| Peak current per phase (additional cooling required) |
2.5 A | 2 A | 2.5 A | 4.5 A |
| Microstep resolutions: | full half 1/4 1/8 |
full half 1/4 1/8 1/16 1/32 |
full half 1/4 1/8 1/16 1/32 |
full half 1/4 1/8 1/16 1/32 |
| Automatic decay selection: |  |
|
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| Automatic gain control (AGC): | |
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| Driver IC | MP6500 | DRV8834 | DRV8825 | TB67S249FTG |
| Price (connectors not soldered): | $19.95 | $29.95 | $29.95 | $39.95 |
| Price (connectors soldered): | $21.95 | $31.95 | $31.95 | $41.95 |
1 See product pages and user’s guide for operating voltage limitations.
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Tic T500 USB Multi-Interface Stepper Motor Controller, bottom view with dimensions. |
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Tic T834 USB Multi-Interface Stepper Motor Controller, bottom view with dimensions. |
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Tic T825 USB Multi-Interface Stepper Motor Controller, bottom view with dimensions. |
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Tic T249 USB Multi-Interface Stepper Motor Controller, bottom view with dimensions.
Basic pinout diagram of the Tic T249 USB Multi-Interface Stepper Motor Controller.
The Tic T249 is based on the TB67S249FTG IC from Toshiba, which allows the Tic T249 to offer several unique and innovative features. One of these is Toshiba’s Active Gain Control (AGC), which automatically reduces the stepper motor current below the set limit based on the actual load on the motor, allowing for reduced unnecessary heat generation and higher peak power when the motor actually needs it. Another is Toshiba’s Advanced Dynamic Mixed Decay (ADMD) technology, which dynamically switches between slow and fast decay modes based on the actual motor current, providing higher efficiency and smoother steps at high speed than you get with traditional timing-based mixed decay.
The Tic T249 can operate from 10 V to 47 V and can deliver up to approximately 1.8 A continuous per phase without a heat sink or forced air flow (the peak current per phase is 4.5 A). This version is sold with connectors soldered so no soldering is necessary to use it.
Tic T249 USB Multi-Interface Stepper Motor Controller (without connectors soldered) with included headers and terminal blocks.
A version is also available that requires no soldering to use as the terminal blocks and main header pins are already installed.
| Size: | 1.50″ × 1.05″ × 0.47″ |
|---|---|
| Weight: | 5.8 g1 |
| Model: | Tic T249 |
|---|---|
| Motor driver: | TB67S249FTG |
| Control interface: |
USB; non-inverted TTL serial; I²C; RC servo pulses; analogue voltage; quadrature encoder |
| Minimum operating voltage: | 10 V |
| Maximum operating voltage: | 47 V2 |
| Continuous current per phase: | 1.8 A3 |
| Maximum current per phase: | 4.5 A4 |
| Maximum step rate: | 50000 PPS |
| Microstep resolutions: | full, non-circular 1/2, circular 1/2, 1/4, 1/8, 1/16, and 1/32 |
| Reverse voltage protection?: | Y5 |
| Connectors soldered?: | N |
| PCB dev codes: | tic05a |
|---|---|
| Other PCB markings: | 0J11911 |
Tic Stepper Motor Controller User’s Guide (Printable PDF)
User’s manual for the Pololu Tic USB Stepper Motor Controller.
Getting up and running with your Tic stepper motor controller from Pololu is easy. This video will guide you through the basic steps to connect your Tic to its software and control a stepper motor from your computer.
Yes. To avoid damaging your stepper motor, you want to avoid exceeding the rated current, which is 600 mA in this instance. The Tic T825 stepper motor controller has configurable current limiting, so you can set a limit that is appropriate for your stepper motor. As long as you set the limit below the rated current, you will be within spec for your motor, even if the voltage exceeds the rated voltage. The voltage rating is just the voltage at which each coil draws the rated current, so the coils of your stepper motor will draw 600 mA at 3.9 V. By using a higher voltage along with active current limiting, the current is able to ramp up faster, which lets you achieve higher step rates than you could using the rated voltage.
If you do want to use a lower motor supply voltage for other reasons, consider using the Tic T500, which operates from 4.5 V to 35 V, or the Tic T834, which operates from 2.5 V to 10.8 V.
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