LB1843V-TLM-E Equivalent & Substitute Parts

Part Overview

The LB1843V-TLM-E is a motor driver IC manufactured by onsemi, classified as a Power Management (PMIC) component. This device functions as a parallel motor driver in a 20-pin SSOP package. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. Substitute parts must maintain compatibility across electrical specifications, motor control capabilities, and package form factors.

Substiute Parts

LB1843V-TLM-E

onsemiIn Stock: 4361LB1843V-TLM-E Datasheet

Current PartRFQ

TC78H621FNG,EL

Toshiba Semiconductor and StorageIn Stock: 24238TC78H621FNG,EL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LB1843V-TLM-E are identified based on the following critical parameters:

• Functional Classification: Motor driver IC with parallel output configuration
• Motor Type Support: Brushed DC motor control capability
• Output Architecture: Half-bridge driver topology
• Control Interface: PWM-based motor control
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status
• Supply Voltage Range: Compatibility with standard logic and motor supply voltages
• Thermal Operating Range: Industrial temperature specifications

The TC78H621FNG,EL from Toshiba Semiconductor and Storage qualifies as a functional substitute based on these core parameters, despite differences in package form factor and specific electrical ratings.

Parameter Comparison

Engineering Selection Recommendations

The TC78H621FNG,EL is an active product with current manufacturing support, addressing the obsolescence status of the LB1843V-TLM-E. Both components maintain identical regulatory compliance profiles (ROHS3, REACH unaffected, EAR99 classification). The substitute part offers improved moisture sensitivity characteristics (MSL 1 versus MSL 3), reducing handling and storage constraints during manufacturing and assembly operations.

Package form factor differs between the original (20-SSOP) and substitute (16-TSSOP), requiring PCB layout modification. The TC78H621FNG,EL operates within standard industrial temperature ranges and provides specified electrical parameters for brushed DC motor control applications.

Frequently Asked Questions (FAQ)

Q: Can the TC78H621FNG,EL directly replace the LB1843V-TLM-E without PCB modifications?

A: No. The original part uses a 20-pin SSOP package while the substitute uses a 16-pin TSSOP package. PCB layout redesign is required to accommodate the different pin count and physical dimensions.

Q: Are regulatory certifications equivalent between these parts?

A: Yes. Both components are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. Compliance documentation requirements remain consistent.

Q: What is the significance of the different Moisture Sensitivity Levels?

A: The LB1843V-TLM-E has MSL 3 (168-hour floor life), while the TC78H621FNG,EL has MSL 1 (unlimited floor life). The substitute part requires less stringent moisture control during storage and assembly, reducing production constraints.

Q: Does the TC78H621FNG,EL support the same motor control applications?

A: The TC78H621FNG,EL is specified for brushed DC motor control with PWM interface and half-bridge output configuration. Functional compatibility depends on your specific application requirements and the original design specifications of the LB1843V-TLM-E.

Q: What is the availability status of the substitute part?

A: The TC78H621FNG,EL is an active product with 24,194 units in current stock, providing reliable supply chain access compared to the obsolete LB1843V-TLM-E.