LB1848M-TE-R-E Equivalent & Substitute Parts

Part Overview

The LB1848M-TE-R-E is a bipolar motor driver IC manufactured by onsemi, designed for fully integrated control and power stage applications in stepper motor systems. This device operates across a 2.5V to 7.5V supply range with 800mA output current capability and is housed in a 10-SOP package. The product is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

LB1848M-TE-R-E

onsemiIn Stock: 759LB1848M-TE-R-E Datasheet

Current PartRFQ

A3966SLBTR-T

Allegro MicroSystemsIn Stock: 18503A3966SLBTR-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The A3966SLBTR-T qualifies as a functional substitute for the LB1848M-TE-R-E based on the following core substitution criteria:

Matching Parameters:

• Motor Type - Stepper: Bipolar
• Function: Driver - Fully Integrated, Control and Power Stage
• Output Configuration: Half Bridge (4)
• Interface: Parallel
• Technology: Bipolar
• Applications: General Purpose
• Mounting Type: Surface Mount

Substitution Constraints: The A3966SLBTR-T operates within a narrower supply voltage range (4.75V ~ 5.5V) compared to the LB1848M-TE-R-E (2.5V ~ 7.5V). This restriction limits substitution applicability to systems operating within the 4.75V to 5.5V window. The A3966SLBTR-T provides 650mA output current versus the LB1848M-TE-R-E's 800mA, representing a 18.75% reduction in current capability. Package form factors differ: the substitute uses a 16-PowerSOIC versus the original's 10-SOP, requiring PCB layout modifications.

Parameter Comparison

Engineering Selection Recommendations

The LB1848M-TE-R-E is classified as obsolete, necessitating alternative sourcing for new production and long-term system support. The A3966SLBTR-T is an active product from Allegro MicroSystems with ROHS3 compliance and extended operating temperature range (-20°C to 150°C junction temperature versus -20°C to 75°C ambient for the original).

Substitution is applicable only when system design operates within the A3966SLBTR-T's supply voltage specification of 4.75V to 5.5V. Systems requiring operation below 4.75V or above 5.5V cannot use this substitute. The reduced output current (650mA versus 800mA) must be evaluated against motor load requirements. PCB redesign is required due to package form factor change from 10-SOP to 16-PowerSOIC.

Frequently Asked Questions (FAQ)

Q: Can the A3966SLBTR-T replace the LB1848M-TE-R-E in all applications?

A: No. The A3966SLBTR-T operates only within 4.75V to 5.5V supply range. Systems requiring the LB1848M-TE-R-E's 2.5V to 7.5V range cannot use this substitute without external voltage regulation.

Q: What is the impact of the 150mA current reduction?

A: The A3966SLBTR-T provides 650mA versus the LB1848M-TE-R-E's 800mA. Motor load current must not exceed 650mA. Applications with stepper motors drawing more than 650mA require alternative solutions.

Q: Are there package compatibility issues?

A: Yes. The A3966SLBTR-T uses 16-PowerSOIC packaging versus the LB1848M-TE-R-E's 10-SOP. PCB layout and footprint modifications are required. Pin assignments must be verified against application schematics.

Q: What compliance certifications apply to the substitute?

A: The A3966SLBTR-T is ROHS3 compliant with MSL 3 (168 Hours) moisture sensitivity. Both parts are REACH unaffected and classified under ECCN EAR99.

Q: Does the A3966SLBTR-T support the same control interface?

A: Yes. Both devices use parallel interface control for bipolar stepper motor driving with identical half-bridge (4) output configuration and fully integrated control and power stage architecture.