A3977KLP Equivalent & Substitute Parts

Part Overview

The A3977KLP is a bipolar stepper motor driver IC manufactured by Allegro MicroSystems, designed for fully integrated motor control and power stage applications. This device operates across a supply voltage range of 3V to 5.5V with load voltage capability from 8V to 35V, delivering up to 2.5A output current. The A3977KLP is classified as an obsolete product, necessitating identification of functionally equivalent alternatives for new designs and ongoing system support.

Substiute Parts

A3977KLP

Allegro MicroSystemsIn Stock: 2090A3977KLP Datasheet

Current PartRFQ

TB6560AHQ,8

Toshiba Semiconductor and StorageIn Stock: 1000362TB6560AHQ,8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A3977KLP is determined by the following critical parameters:

Motor driver type and control architecture (bipolar stepper motor driver with fully integrated control and power stage)

Output configuration (half bridge with 4 outputs)

Output current capability (minimum 2.5A)

Supply voltage range compatibility (overlap with 3V ~ 5.5V range)

Load voltage range (8V ~ 35V minimum)

Step resolution support (1, 1/2, 1/4, 1/8 minimum)

The TB6560AHQ,8 meets these substitution criteria as a bipolar stepper motor driver with half bridge output configuration, integrated control and power stage, and compatible step resolution capabilities.

Parameter Comparison

Engineering Selection Recommendations

The TB6560AHQ,8 serves as a functional equivalent for the obsolete A3977KLP in bipolar stepper motor driver applications. Key considerations for selection:

The TB6560AHQ,8 is an active product with current manufacturing support, addressing the obsolescence status of the A3977KLP.

The TB6560AHQ,8 achieves ROHS3 compliance, whereas the A3977KLP is RoHS non-compliant, making the substitute suitable for applications requiring current regulatory compliance.

The TB6560AHQ,8 operates within a narrower supply voltage range (4.5V ~ 5.5V) compared to the A3977KLP (3V ~ 5.5V). Applications requiring operation below 4.5V supply voltage cannot use this substitute without design modification.

The TB6560AHQ,8 supports an extended step resolution of 1/16, providing additional microstepping capability beyond the A3977KLP specification.

The TB6560AHQ,8 uses through-hole mounting (25-SSIP) versus surface mount (28-TSSOP) for the A3977KLP, requiring PCB layout redesign.

Operating temperature range is reduced with the TB6560AHQ,8 (-30°C ~ 85°C) compared to the A3977KLP (-40°C ~ 150°C), limiting use in high-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can the TB6560AHQ,8 directly replace the A3977KLP without PCB modification?

A: No. The TB6560AHQ,8 uses through-hole mounting (25-SSIP package) while the A3977KLP uses surface mount (28-TSSOP package). PCB layout redesign is required.

Q: What is the minimum supply voltage for the TB6560AHQ,8?

A: The TB6560AHQ,8 operates at a minimum supply voltage of 4.5V. The A3977KLP supports operation down to 3V. Applications requiring 3V to 4.5V operation cannot use the TB6560AHQ,8 as a substitute.

Q: Are there interface differences between these devices?

A: Yes. The A3977KLP uses Logic interface, while the TB6560AHQ,8 uses Parallel interface. Control signal compatibility must be verified during design integration.

Q: Does the TB6560AHQ,8 support the same step resolution as the A3977KLP?

A: The TB6560AHQ,8 supports all step resolutions of the A3977KLP (1, 1/2, 1/4, 1/8) and adds support for 1/16 resolution, providing enhanced microstepping capability.

Q: What compliance advantages does the TB6560AHQ,8 offer?

A: The TB6560AHQ,8 is ROHS3 compliant and actively manufactured, whereas the A3977KLP is RoHS non-compliant and obsolete. New designs should use the TB6560AHQ,8 to meet current regulatory requirements.

Q: Is the output current rating compatible?

A: Yes. The TB6560AHQ,8 provides 3A output current, exceeding the A3977KLP specification of 2.5A, making it suitable for applications within the A3977KLP current range.

Q: What are the temperature operating range limitations?

A: The TB6560AHQ,8 operates from -30°C to 85°C (ambient), while the A3977KLP operates from -40°C to 150°C (junction). Applications requiring operation below -30°C or above 85°C cannot use the TB6560AHQ,8.