TLC5941RHB LED Driver IC Equivalent & Substitute Parts

Part Overview

The TLC5941RHB is a 16-output linear LED driver IC manufactured by Texas Instruments, designed for backlight and signage applications. It features shift register topology with internal switches, supporting 80mA per channel output at supply voltages between 3V and 5.5V. The device is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design updates. Substitute parts must maintain functional compatibility across key electrical parameters including output count, supply voltage range, output current capability, and package form factor.

Substiute Parts

TLC5941RHB

Texas InstrumentsIn Stock: 859TLC5941RHB Datasheet

Current PartRFQ

TLC5941RHBT

Texas InstrumentsIn Stock: 1928TLC5941RHBT Datasheet

MFR RecommendedRFQ

PCA9745BTWJ

NXP USA Inc.In Stock: 1778PCA9745BTWJ Datasheet

MFR RecommendedRFQ

STP16CP05XTTR

STMicroelectronicsIn Stock: 1282STP16CP05XTTR Datasheet

MFR RecommendedRFQ

STP16CPC05XTTR

STMicroelectronicsIn Stock: 1648STP16CPC05XTTR Datasheet

MFR RecommendedRFQ

STP16CPP05MTR

STMicroelectronicsIn Stock: 33470STP16CPP05MTR Datasheet

MFR RecommendedRFQ

STP16DPPS05MTR

STMicroelectronicsIn Stock: 1982STP16DPPS05MTR Datasheet

MFR RecommendedRFQ

STP16DPPS05XTTR

STMicroelectronicsIn Stock: 1153STP16DPPS05XTTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TLC5941RHB are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution logic is determined by the following parameters:

Critical Compatibility Parameters:

• Number of Outputs: 16 (all substitutes maintain this requirement)
• Supply Voltage Range: 3V to 5.5V (all substitutes support this range)
• Topology: Shift Register with internal switches
• Mounting Type: Surface Mount
• RoHS3 Compliance: All substitutes maintain this certification

Substitution Categories:

Category 1 - Direct Manufacturer Equivalent (Texas Instruments): TLC5941RHBT is the active production equivalent from the same manufacturer, differing only in packaging format (Tape & Reel vs. bulk).

Category 2 - Cross-Manufacturer Substitutes with Electrical Equivalence: Parts from STMicroelectronics (STP16 series) and NXP (PCA9745BTWJ) maintain 16-output shift register topology with compatible supply voltage ranges. These parts differ in output current per channel, package form factor, and operating temperature ranges but remain functionally equivalent for applications where the TLC5941RHB was specified.

Category 3 - Package and Current Rating Variations: STP16CP05XTTR and STP16CPC05XTTR offer higher output current (100mA vs. 80mA) in smaller TSSOP packages. STP16CPP05MTR and STP16DPPS05MTR provide lower output current (40mA) in standard SOP packages. These variations allow design flexibility based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - TLC5941RHBT: TLC5941RHBT is the manufacturer-recommended substitute from Texas Instruments. It maintains identical electrical specifications and package form factor as the TLC5941RHB, differing only in packaging format (Tape & Reel). This part is in active production status with ROHS3 compliance and MSL 2 rating. Selection of this part eliminates design changes and maintains full compatibility with existing PCB layouts and firmware.

Secondary Recommendations - STMicroelectronics STP16 Series: The STP16 series (STP16CP05XTTR, STP16CPC05XTTR, STP16CPP05MTR, STP16DPPS05MTR, STP16DPPS05XTTR) provides active production alternatives with extended operating temperature ranges (-40°C to 125°C vs. -85°C). These parts maintain 16-output shift register topology with compatible supply voltage specifications. Selection depends on application current requirements: STP16CP05 variants support 100mA per channel, while STP16CPP05 and STP16DPPS05 variants support 40mA per channel. All STMicroelectronics parts feature MSL 1 (Unlimited) rating, providing superior moisture handling compared to the original part.

Alternative Recommendation - PCA9745BTWJ: PCA9745BTWJ from NXP USA Inc. provides a 16-output linear LED driver with SPI dimming interface and automotive-grade qualification. This part supports 57mA per channel output and operates across -40°C to 105°C. The part features MSL 1 (Unlimited) rating and is suitable for applications requiring higher output voltage (20V) and automotive-grade reliability. Note that this part lacks internal switches, requiring external switching implementation.

Compliance and Certification: All recommended substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the original TLC5941RHB certification profile. Selection should prioritize parts with active production status to ensure long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can TLC5941RHBT be used as a direct replacement for TLC5941RHB? A: Yes. TLC5941RHBT is the manufacturer-recommended equivalent from Texas Instruments. It maintains identical electrical specifications, package form factor (32-VFQFN), and operating parameters. The only difference is packaging format (Tape & Reel vs. bulk). No design changes are required.

Q: What are the key differences between the TLC5941RHB and STMicroelectronics STP16 series substitutes? A: The primary differences are: (1) Output current per channel varies (80mA for TLC5941RHB vs. 100mA for STP16CP05 variants or 40mA for STP16CPP05/STP16DPPS05 variants); (2) Package form factor differs (32-VFQFN for TLC5941RHB vs. 24-TSSOP or 24-SOIC for STP16 variants); (3) Operating temperature range extends to 125°C for STP16 parts vs. 85°C for TLC5941RHB; (4) Moisture sensitivity improves to MSL 1 (Unlimited) for STP16 parts vs. MSL 2 (1 Year) for TLC5941RHB.

Q: Is PCA9745BTWJ compatible with TLC5941RHB applications? A: PCA9745BTWJ maintains 16-output shift register topology and compatible supply voltage range (3V to 5.5V), making it functionally equivalent for LED driver applications. However, it lacks internal switches and features SPI dimming interface instead of standard shift register dimming. Output current per channel is 57mA vs. 80mA for the original part. Applications requiring internal switches or standard shift register control may require firmware modifications.

Q: What package considerations apply when selecting substitute parts? A: The TLC5941RHB uses 32-VFQFN (5x5) package. STMicroelectronics substitutes use either 24-TSSOP or 24-SOIC packages, requiring PCB layout redesign. TLC5941RHBT maintains the original 32-VFQFN package, eliminating layout changes. PCA9745BTWJ uses 28-HTSSOP package. Package selection directly impacts PCB footprint, thermal management, and board space allocation.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All recommended substitute parts (TLC5941RHBT, PCA9745BTWJ, and all STP16 variants) maintain ROHS3 compliance and REACH Unaffected status, matching the original TLC5941RHB certification profile.

Q: What is the significance of MSL rating differences? A: The TLC5941RHB carries MSL 2 (1 Year) rating, requiring storage in controlled humidity conditions and limiting shelf life to one year after moisture exposure. All substitute parts feature MSL 1 (Unlimited) rating, eliminating moisture sensitivity constraints and providing indefinite shelf life. This improves supply chain flexibility and reduces inventory management complexity.

Q: Which substitute part offers the highest output current capability? A: STP16CP05XTTR and STP16CPC05XTTR support 100mA per channel output, exceeding the TLC5941RHB specification of 80mA. These parts are suitable for applications requiring higher LED brightness or driving additional load per output channel.

Q: Can lower-current STP16 variants (40mA) replace the TLC5941RHB in all applications? A: STP16CPP05MTR and STP16DPPS05MTR support only 40mA per channel, which is 50% of the TLC5941RHB specification. These parts are suitable only for applications where total LED current per channel does not exceed 40mA. Applications requiring 80mA per channel must use higher-current variants or parallel multiple outputs.