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| PartNumber | A3977SED | A3977SED-T | A3977SEDT |
| Description | IC MTR DRVR BIPOLR 3-5.5V 44PLCC | IC MTR DRVR BIPOLR 3-5.5V 44PLCC | |
| Manufacturer | ALLEGRO | Allegro MicroSystems, LLC | ALEGRO |
| Product Category | IC Chips | PMIC - Motor Drivers, Controllers | PMIC - Motor Drivers, Controllers |
| Series | - | - | - |
| Packaging | Tube | Tube | - |
| Package Case | 44-LCC (J-Lead) | 44-LCC (J-Lead) | - |
| Technology | DMOS | DMOS | - |
| Operating Temperature | -20°C ~ 150°C (TJ) | -20°C ~ 150°C (TJ) | - |
| Mounting Type | Surface Mount | Surface Mount | - |
| Function | Driver - Fully Integrated, Control and Power Stage | Driver - Fully Integrated, Control and Power Stage | - |
| Applications | General Purpose | General Purpose | - |
| Interface | Step/Direction | Step/Direction | - |
| Voltage Supply | 3 V ~ 5.5 V | 3 V ~ 5.5 V | - |
| Supplier Device Package | 44-PLCC (16.59x16.59) | 44-PLCC (16.59x16.59) | - |
| Current Output | 2.5A | 2.5A | - |
| Output Configuration | Half Bridge (4) | Half Bridge (4) | - |
| Voltage Load | 8 V ~ 35 V | 8 V ~ 35 V | - |
| Motor Type Stepper | Bipolar | Bipolar | - |
| Motor Type AC DC | - | - | - |
| Step Resolution | 1, 1/2, 1/4, 1/8 | 1, 1/2, 1/4, 1/8 | - |