TLC5940QPWPREP LED Driver IC Equivalent & Substitute Parts

Part Overview

The TLC5940QPWPREP is an active, production-status LED driver IC manufactured by Texas Instruments. This 16-output linear shift register device is designed for LED applications requiring individual channel current control up to 120mA per output. The device operates across a 3V to 5.5V supply range and is packaged in a 28-HTSSOP surface mount configuration.

Substitute parts are identified when equivalent functional performance can be achieved within the allowed electrical and mechanical parameters of this product category, including output count, supply voltage compatibility, shift register topology, and surface mount packaging standards.

Substiute Parts

TLC5940QPWPREP

Texas InstrumentsIn Stock: 1071TLC5940QPWPREP Datasheet

Current PartRFQ

LED1642GWTTR

STMicroelectronicsIn Stock: 2773LED1642GWTTR Datasheet

MFR RecommendedRFQ

MAX6979AUG+

Analog Devices Inc./Maxim IntegratedIn Stock: 2278MAX6979AUG+ Datasheet

MFR RecommendedRFQ

STP16CPS05MTR

STMicroelectronicsIn Stock: 10475STP16CPS05MTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TLC5940QPWPREP are qualified based on the following criteria:

Core Functional Requirements:

• 16 output channels (shift register topology)
• Linear driver type with internal switching capability
• Supply voltage range: 3V to 5.5V minimum compatibility
• Surface mount packaging

Electrical Compatibility Factors:

• Output current per channel (120mA baseline; substitutes may vary within application tolerance)
• Maximum output voltage capability
• Operating frequency (30MHz reference)
• Operating temperature range (-40°C to 125°C preferred for full compatibility)

Mechanical & Compliance Factors:

• Surface mount technology (TSSOP, SOP, or equivalent)
• RoHS3 compliance
• Active product status

The three identified substitutes (LED1642GWTTR, MAX6979AUG+, STP16CPS05MTR) meet the core functional requirements of 16-output linear shift register LED drivers with compatible supply voltages. Variations in output current, package size, and temperature range are documented in the parameter comparison table below.

Parameter Comparison

Engineering Selection Recommendations

TLC5940QPWPREP (Primary Part) All specifications met as designed. Recommended for applications requiring 120mA per-channel output current and extended temperature operation to 125°C. 28-HTSSOP package provides compact footprint. Active product status with full RoHS3 compliance.

LED1642GWTTR (STMicroelectronics Substitute) Suitable for applications where per-channel output current requirement is 40mA or lower. Maintains 16-output shift register topology and 3V-5.5V supply compatibility. Operating temperature limited to 85°C; not recommended for extended temperature applications. 24-TSSOP package is smaller than primary part. Active product status with RoHS3 compliance.

MAX6979AUG+ (Analog Devices Inc./Maxim Integrated Substitute) Suitable for applications where per-channel output current requirement is 55mA or lower. Maintains 16-output shift register topology and 3V-5.5V supply compatibility. Output voltage limited to 5.5V; suitable for low-voltage LED applications. Extended temperature operation to 125°C supported. 24-TSSOP package. Active product status with RoHS3 compliance and MSL-1 moisture rating.

STP16CPS05MTR (STMicroelectronics Substitute) Suitable for applications where per-channel output current requirement is 100mA or lower. Maintains 16-output shift register topology and 3V-5.5V supply compatibility. Extended temperature operation to 125°C supported. 24-SOIC package is larger than primary part; PCB layout modifications required. Active product status with RoHS3 compliance and MSL-1 moisture rating.

Frequently Asked Questions (FAQ)

Q: Can LED1642GWTTR replace TLC5940QPWPREP in all applications? A: LED1642GWTTR is a functional substitute only for applications where per-channel output current does not exceed 40mA. The TLC5940QPWPREP supports 120mA per channel. Additionally, LED1642GWTTR operating temperature is limited to 85°C, compared to 125°C for the primary part.

Q: What is the primary difference between MAX6979AUG+ and the other substitutes? A: MAX6979AUG+ has a maximum output voltage of 5.5V, which is significantly lower than the other parts (17V-20V range). This limits its use to low-voltage LED applications. Per-channel output current is 55mA.

Q: Is STP16CPS05MTR a direct pin-for-pin replacement? A: No. STP16CPS05MTR uses a 24-SOIC package (0.295" width) compared to the TLC5940QPWPREP 28-PowerTSSOP package (0.173" width). PCB layout modifications are required. Pin count differs (24 vs. 28).

Q: Are all substitute parts RoHS3 compliant? A: Yes. All identified substitutes (LED1642GWTTR, MAX6979AUG+, STP16CPS05MTR) are ROHS3 compliant and active production parts.

Q: Which substitute supports the full operating temperature range of the primary part? A: MAX6979AUG+ and STP16CPS05MTR both support -40°C to 125°C operating temperature, matching the TLC5940QPWPREP. LED1642GWTTR is limited to -40°C to 85°C.

Q: Can I use these substitutes interchangeably in my design? A: Substitution depends on your specific application requirements for per-channel output current, maximum output voltage, operating temperature, and PCB package footprint. Verify that the substitute part's electrical specifications meet or exceed your application's minimum requirements.