MIC5400BWM LED Driver IC Equivalent & Substitute Parts

Part Overview

The MIC5400BWM is a 16-output linear LED driver IC manufactured by Microchip Technology, housed in a 28-SOIC package with 30mA per-channel output capability. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives. The device operates within a 4.75V to 5.5V supply range and supports operating temperatures from -40°C to 125°C. Substitute parts must maintain core functionality: 16 output channels, linear driver topology with internal switching capability, and compatible electrical specifications for direct application replacement.

Substiute Parts

MIC5400BWM

Microchip TechnologyIn Stock: 1144MIC5400BWM Datasheet

Current PartRFQ

MIC5400YWM

Microchip TechnologyIn Stock: 3933MIC5400YWM Datasheet

DirectRFQ

TLC5923DAPR

Texas InstrumentsIn Stock: 19353TLC5923DAPR Datasheet

MFR RecommendedRFQ

TLC5929DBQ

Texas InstrumentsIn Stock: 1433TLC5929DBQ Datasheet

MFR RecommendedRFQ

TLC5944RHBT

Texas InstrumentsIn Stock: 2586TLC5944RHBT Datasheet

MFR RecommendedRFQ

TLC5946PWPR

Texas InstrumentsIn Stock: 19892TLC5946PWPR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the MIC5400BWM is based on the following critical parameters:

• Output Channel Count: All substitutes maintain 16 output channels
• Driver Type: All substitutes are linear LED drivers with internal switching capability
• Supply Voltage Range: Substitutes must support operation within or encompassing the 4.75V–5.5V range
• Output Current Capability: Substitutes range from 30mA to 80mA per channel, accommodating the original 30mA specification
• Package Compatibility: Substitutes include both the original 28-SOIC form factor and alternative surface-mount packages
• Mounting Type: All substitutes are surface-mount devices

The MIC5400YWM represents a direct Microchip equivalent with identical electrical specifications but different packaging (Tube vs. Bulk) and improved RoHS3 compliance. Texas Instruments alternatives (TLC5923DAPR, TLC5929DBQ, TLC5944RHBT, TLC5946PWPR) provide enhanced specifications including higher output current, extended frequency support, and active product status, though with different package geometries.

Parameter Comparison

Engineering Selection Recommendations

MIC5400YWM (Microchip Technology): Direct electrical equivalent with identical 30mA output current and 28-SOIC package footprint. Offers ROHS3 compliance upgrade over the original MIC5400BWM. Suitable for applications requiring form-factor compatibility with existing PCB layouts. Product status is Obsolete; inventory availability should be confirmed before design commitment.

TLC5946PWPR (Texas Instruments): Maintains 28-SOIC package compatibility while providing 40mA per-channel output current and active product status. Supports extended frequency operation and ROHS3 compliance. Recommended for new designs requiring long-term supply assurance and higher current capability within the original package footprint.

TLC5944RHBT (Texas Instruments): Provides 60mA per-channel output current in a 32-VQFN package with active product status and ROHS3 compliance. Suitable for applications where package size reduction is acceptable and higher output current is beneficial.

TLC5923DAPR (Texas Instruments): Highest output current specification at 80mA per channel in a 32-PowerTSSOP package. Active product status and ROHS3 compliance. Recommended for high-brightness LED applications requiring maximum current delivery.

TLC5929DBQ (Texas Instruments): Compact 24-SSOP package option with 50mA per-channel output current. Active product status and ROHS3 compliance. Suitable for space-constrained applications.

All Texas Instruments alternatives operate at reduced maximum junction temperature (-40°C to 85°C TA vs. -40°C to 125°C TJ for Microchip parts). Applications requiring operation above 85°C ambient temperature should retain Microchip-based solutions or implement thermal management strategies.

Frequently Asked Questions (FAQ)

Q: Can TLC5946PWPR directly replace MIC5400BWM without PCB modification?

A: TLC5946PWPR maintains the 28-SOIC package geometry, enabling direct pin-compatible substitution. However, verify pinout alignment and signal timing compatibility with your application schematic before implementation.

Q: What is the primary difference between MIC5400YWM and MIC5400BWM?

A: MIC5400YWM is electrically identical to MIC5400BWM (same 30mA output current, 4.75V–5.5V supply range, 28-SOIC package) but differs in packaging format (Tube vs. Bulk) and RoHS compliance status (ROHS3 vs. non-compliant). Both are Microchip products with identical functional specifications.

Q: Why do Texas Instruments substitutes have lower maximum operating temperature?

A: Texas Instruments LED driver ICs in this category specify -40°C to 85°C ambient temperature (TA) operation, while Microchip specifies -40°C to 125°C junction temperature (TJ). Applications requiring operation above 85°C ambient should use Microchip alternatives or implement thermal management.

Q: Are all substitute parts RoHS3 compliant?

A: All Texas Instruments substitutes (TLC5923DAPR, TLC5929DBQ, TLC5944RHBT, TLC5946PWPR) are ROHS3 compliant. MIC5400YWM is ROHS3 compliant; the original MIC5400BWM is non-compliant. Regulatory requirements should guide compliance selection.

Q: Which substitute offers the best form-factor compatibility?

A: TLC5946PWPR and MIC5400YWM both use 28-SOIC packages, providing direct footprint compatibility with existing MIC5400BWM PCB designs. Other substitutes require package-specific PCB layout modifications.

Q: What output current should I select for my application?

A: Select based on LED current requirements. MIC5400YWM and MIC5400BWM support 30mA per channel. TLC5946PWPR provides 40mA, TLC5929DBQ provides 50mA, TLC5944RHBT provides 60mA, and TLC5923DAPR provides 80mA. Higher current capability accommodates brighter LED operation or multiple LED strings per channel.

Q: Are frequency specifications critical for substitution?

A: Frequency specifications (20MHz–30MHz for Texas Instruments parts) relate to shift-register operation and data throughput. Verify your application's data rate requirements against substitute frequency ratings. MIC5400BWM does not specify frequency; Texas Instruments alternatives support higher-speed serial communication.