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Part Details for A3955SLB by Allegro MicroSystems LLC
Results Overview of A3955SLB by Allegro MicroSystems LLC
- Distributor Offerings: (2 listings)
- Number of FFF Equivalents: (0 replacements)
- CAD Models: (Available)
- Number of Functional Equivalents: (4 options)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
Tip: Data for a part may vary between manufacturers. You can filter for manufacturers on the top of the page next to the part image and part number.
Applications
Education and Research
Aerospace and Defense
Agriculture Technology
Automotive
Robotics and Drones
A3955SLB Information
A3955SLB by Allegro MicroSystems LLC is a Motion Control Electronic.
Motion Control Electronics are under the broader part category of Signal Circuits.
A signal is an electronic means of transmitting information, either as an analog signal with continuous values or a digital signal with discrete values. Signals are used in various systems and networks. Read more about Signal Circuits on our Signal Circuits part category page.
Price & Stock for A3955SLB
| Part # | Distributor | Description | Stock | Price | Buy | |
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Bristol Electronics | 9 |
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RFQ | ||
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Win Source Electronics | IC MOTOR DRIVER PAR 16SOIC | 14000 |
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$3.8088 / $5.7131 | Buy Now |
Part Details for A3955SLB
A3955SLB CAD Models
A3955SLB Part Data Attributes
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A3955SLB
Allegro MicroSystems LLC
Buy Now
Datasheet
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Compare Parts:
A3955SLB
Allegro MicroSystems LLC
Stepper Motor Controller, 1.5A, BIPolar, PDSO16, PLASTIC, SOIC-16
Select a part to compare: |
| Rohs Code | No | |
| Part Life Cycle Code | Obsolete | |
| Ihs Manufacturer | ALLEGRO MICROSYSTEMS LLC | |
| Part Package Code | SOIC | |
| Package Description | PLASTIC, SOIC-16 | |
| Pin Count | 16 | |
| Reach Compliance Code | unknown | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.01 | |
| Samacsys Manufacturer | Allegro Microsystems | |
| Additional Feature | ADDITIONAL 5V TO 50V VBB POWER SUPPLY ALSO REQUIRED | |
| Analog IC - Other Type | STEPPER MOTOR CONTROLLER | |
| JESD-30 Code | R-PDSO-G16 | |
| JESD-609 Code | e0 | |
| Length | 10.3 mm | |
| Number of Functions | 1 | |
| Number of Terminals | 16 | |
| Operating Temperature-Max | 85 °C | |
| Operating Temperature-Min | -20 °C | |
| Output Current-Max | 1.5 A | |
| Package Body Material | PLASTIC/EPOXY | |
| Package Code | SOP | |
| Package Equivalence Code | SOP16,.4 | |
| Package Shape | RECTANGULAR | |
| Package Style | SMALL OUTLINE | |
| Peak Reflow Temperature (Cel) | 240 | |
| Qualification Status | Not Qualified | |
| Seated Height-Max | 2.65 mm | |
| Supply Current-Max (Isup) | 50 mA | |
| Supply Voltage-Max (Vsup) | 5.5 V | |
| Supply Voltage-Min (Vsup) | 4.5 V | |
| Supply Voltage-Nom (Vsup) | 5 V | |
| Surface Mount | YES | |
| Technology | BIPOLAR | |
| Temperature Grade | OTHER | |
| Terminal Finish | Tin/Lead (Sn/Pb) | |
| Terminal Form | GULL WING | |
| Terminal Pitch | 1.27 mm | |
| Terminal Position | DUAL | |
| Time@Peak Reflow Temperature-Max (s) | 30 | |
| Width | 7.5 mm |
Alternate Parts for A3955SLB
This table gives cross-reference parts and alternative options found for A3955SLB. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of A3955SLB, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
| Part Number | Manufacturer | Composite Price | Description | Compare |
|---|---|---|---|---|
| A3955SLBTR | Allegro MicroSystems LLC | Check for Price | Stepper Motor Controller, 1.5A, BIPolar, PDSO16, PLASTIC, SOIC-16 | A3955SLB vs A3955SLBTR |
| A3955SB | Sanken Electric Co Ltd | Check for Price | Stepper Motor Controller, PDIP16, DIP-16 | A3955SLB vs A3955SB |
| A3955SB-T | Allegro MicroSystems LLC | Check for Price | Stepper Motor Controller, 1.5A, BIPolar, PDIP16, LEAD FREE, PLASTIC, MS-001BB, DIP-16 | A3955SLB vs A3955SB-T |
| A3955SB | Allegro MicroSystems LLC | Check for Price | Stepper Motor Controller, 1.5A, BIPolar, PDIP16, PLASTIC, DIP-16 | A3955SLB vs A3955SB |
A3955SLB Frequently Asked Questions (FAQ)
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A good PCB layout for the A3955SLB involves keeping the high-current paths short and wide, using multiple vias to connect the device to the ground plane, and placing decoupling capacitors close to the device. Allegro provides a recommended PCB layout in their application note AN296070.
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The sense resistor (Rs) should be chosen based on the desired current sense accuracy and the maximum current rating of the application. A smaller Rs value provides better accuracy but increases power loss, while a larger Rs value reduces power loss but decreases accuracy. Allegro recommends Rs values between 0.01 ohms and 0.1 ohms.
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The VREG pin is an internal voltage regulator output that can be used to power external circuitry. It is a 5V output with a maximum current rating of 10mA. This pin can be used to power low-current devices, such as sensors or microcontrollers, reducing the need for external power supplies.
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The A3955SLB has a built-in overcurrent protection feature that can be enabled by connecting the ISP pin to VCC. The device will then limit the output current to a predetermined value (typically 2.5A) to prevent damage from excessive current. The overcurrent threshold can be adjusted by connecting a resistor between the ISP pin and GND.
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The A3955SLB has an operating temperature range of -20°C to 85°C. However, the device can be operated at temperatures up to 150°C for short periods of time (e.g., during motor startup). It is essential to ensure proper thermal management to prevent overheating and ensure reliable operation.