TLC5945PWP LED Driver IC Equivalent & Substitute Parts

Part Overview

The TLC5945PWP is a 16-output linear LED driver IC manufactured by Texas Instruments, designed for backlight applications. It operates with a 3V to 5.5V supply voltage and delivers 80mA per output channel. The device features a shift register topology with internal switches and operates at 30MHz frequency. Currently in Last Time Buy status, this part requires identification of suitable alternatives for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	TLC5945PWP
Category	Power Management (PMIC)
Number of Outputs	16
Current per Output Channel	80mA
Supply Voltage Range	3V to 5.5V
Output Voltage	17V
Topology	Shift Register
Operating Temperature	-40°C to 85°C
Package	28-PowerTSSOP
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution for the TLC5945PWP is determined by the following critical parameters: 16 output channels, shift register topology, internal switches, 3V to 5.5V supply voltage range, and surface mount packaging. Acceptable substitutes must maintain these core electrical and functional characteristics.

Substitutes are grouped into two categories:

Direct Equivalents (Same Output Current - 80mA): Parts that match the 80mA per-channel specification with identical or compatible packaging and electrical performance.

Parametric Equivalents (Higher Output Current - 120mA): Parts that exceed the 80mA specification, providing higher current capability while maintaining the same 16-output shift register architecture and supply voltage range. These are suitable for applications requiring increased output current headroom.

Alternative Topology Substitutes (Different Package/Current): Parts from alternative manufacturers with different package formats or output current ratings that maintain core functional compatibility through shift register topology and 16-output configuration.

Parameter Comparison

Part Number	Manufacturer	Outputs	Current/Channel (mA)	Supply Voltage (V)	Output Voltage (V)	Package	Operating Temp (°C)	Product Status	Packaging Type
TLC5945PWP	Texas Instruments	16	80	3.0 - 5.5	17	28-PowerTSSOP	-40 to 85	Last Time Buy	Tube
TLC5945PWPR	Texas Instruments	16	80	3.0 - 5.5	17	28-PowerTSSOP	-40 to 85	Active	Tape & Reel
TLC5940PWP	Texas Instruments	16	120	3.0 - 5.5	17	28-PowerTSSOP	-40 to 85	Last Time Buy	Tube
TLC59401PWP	Texas Instruments	16	120	3.0 - 5.5	17	28-PowerTSSOP	-40 to 85	Active	Tube
MAX6969AUG+T	Analog Devices Inc./Maxim Integrated	16	55	3.0 - 5.5	5.5	24-TSSOP	-40 to 125	Active	Cut Tape & Digi-Reel
MAX6969AWG+	Analog Devices Inc./Maxim Integrated	16	55	3.0 - 5.5	5.5	24-SOIC	-40 to 125	Active	Tube
STP16CPC05XTTR	STMicroelectronics	16	100	3.0 - 5.5	20	24-TSSOP-EP	-40 to 125	Active	Tape & Reel
STP16DPP05TTR	STMicroelectronics	16	40	3.0 - 5.5	20	24-TSSOP	-40 to 125	Active	Tape & Reel

Engineering Selection Recommendations

Primary Recommendation - TLC5945PWPR: This part is the direct equivalent to TLC5945PWP with identical electrical specifications and package format. The only difference is packaging type (Tape & Reel versus Tube). Product status is Active, ensuring long-term availability and supply continuity. This is the preferred substitute for direct replacement.

Secondary Recommendation - TLC59401PWP or TLC5940PWP: Both parts maintain the 28-PowerTSSOP package and 3V to 5.5V supply voltage range while providing increased output current capability (120mA versus 80mA). These are suitable for applications where higher per-channel current is beneficial. TLC59401PWP has Active status, while TLC5940PWP is Last Time Buy.

Alternative Recommendation - STP16CPC05XTTR: This STMicroelectronics part offers 100mA per-channel output current with extended operating temperature range (-40°C to 125°C). The 24-TSSOP-EP package differs from the original, requiring PCB layout verification. Product status is Active with long-term availability.

Limited Recommendation - MAX6969AUG+T or MAX6969AWG+: These Analog Devices/Maxim parts provide 16-output shift register topology with Active product status. However, output current is limited to 55mA and output voltage is restricted to 5.5V, making them suitable only for applications with lower current requirements. Extended operating temperature range (-40°C to 125°C) is available.

Not Recommended - STP16DPP05TTR: Output current of 40mA is below the original specification, limiting applicability to lower-current designs only.

Frequently Asked Questions (FAQ)

Q: Can TLC5945PWPR be used as a direct replacement for TLC5945PWP?

A: Yes. TLC5945PWPR is electrically and functionally identical to TLC5945PWP. The difference is packaging format: TLC5945PWPR is supplied in Tape & Reel while TLC5945PWP is supplied in Tube. Both use the same 28-PowerTSSOP package and have identical electrical specifications. Verify your assembly equipment can handle the packaging format.

Q: What is the difference between TLC5945PWP and TLC59401PWP?

A: Both parts use the same 28-PowerTSSOP package and 3V to 5.5V supply voltage. The primary difference is output current per channel: TLC5945PWP delivers 80mA while TLC59401PWP delivers 120mA. TLC59401PWP is suitable for applications requiring higher per-channel current. TLC59401PWP has Active product status, providing better long-term availability.

Q: Can I use MAX6969AUG+T or MAX6969AWG+ as substitutes?

A: These parts maintain 16-output shift register topology and 3V to 5.5V supply voltage compatibility. However, output current is limited to 55mA per channel and output voltage is capped at 5.5V. Use these only if your application requires lower output current. Package format differs (24-TSSOP or 24-SOIC), requiring PCB layout changes.

Q: What are the package differences among substitute parts?

A: TLC5945PWP and TLC5945PWPR use 28-PowerTSSOP (0.173" width, 4.40mm). MAX6969 variants use 24-TSSOP or 24-SOIC (0.173" or 0.295" width). STP16 variants use 24-TSSOP or 24-TSSOP-EP. Package changes require PCB redesign and assembly process verification.

Q: Which substitute has the best long-term availability?

A: TLC5945PWPR, TLC59401PWP, MAX6969AUG+T, MAX6969AWG+, and STP16CPC05XTTR all have Active product status, ensuring continued manufacturing and supply. Avoid TLC5940PWP and TLC5945PWP, both in Last Time Buy status.

Q: Can I use STP16CPC05XTTR for higher current applications?

A: Yes. STP16CPC05XTTR delivers 100mA per channel, exceeding the original 80mA specification. It maintains 3V to 5.5V supply voltage compatibility and offers extended operating temperature range (-40°C to 125°C). The 24-TSSOP-EP package differs from the original, requiring PCB layout verification and thermal management consideration due to the exposed pad.

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