STP16DPP05XTTR LED Driver IC Equivalent & Substitute Parts

Part Overview

The STP16DPP05XTTR is a 16-output linear LED driver IC manufactured by STMicroelectronics, designed for shift register-based LED control applications. This device operates as an active product with ROHS3 compliance and features internal switches for direct LED driving at 40mA per channel. The part is housed in a 24-TSSOP package with exposed pad and supports supply voltages from 3V to 5.5V.

Substitute parts are identified when equivalent functional performance can be achieved through alternative manufacturers' devices that maintain compatibility with the primary electrical and mechanical parameters. Substitution becomes necessary due to inventory constraints, lead time requirements, or design flexibility across multiple sourcing options.

Key Parameters

Parameter	STP16DPP05XTTR
Manufacturer	STMicroelectronics
Category	Power Management (PMIC)
Type	Linear
Topology	Shift Register
Number of Outputs	16
Current - Output / Channel	40mA
Voltage - Supply (Min)	3V
Voltage - Supply (Max)	5.5V
Voltage - Output	20V
Frequency	30MHz
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	24-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the STP16DPP05XTTR are classified based on strict adherence to the following critical parameters:

Primary Substitution Criteria:

Number of Outputs: 16 channels (mandatory)
Type: Linear topology (mandatory for shift register applications)
Topology: Shift Register (mandatory for serial data input compatibility)
Internal Switches: Present (mandatory for direct LED driving)
Supply Voltage Range: Minimum 3V, Maximum 5.5V (mandatory for power supply compatibility)
Mounting Type: Surface Mount (mandatory for PCB assembly compatibility)
RoHS Status: ROHS3 Compliant (mandatory for regulatory compliance)

Secondary Compatibility Parameters:

Current - Output / Channel: 40mA baseline; substitutes with 45mA to 120mA are acceptable for applications requiring equal or greater current capacity
Operating Temperature: -40°C minimum acceptable; upper limit of 85°C acceptable for most applications
Package / Case: Alternative packages acceptable if pin count and functionality remain compatible with shift register protocol
Frequency: 15MHz to 35MHz acceptable for shift register clock operation

Substitutes that deviate from primary criteria (such as I2C control topology or power switch type) are listed for reference but represent functional alternatives rather than direct pin-compatible replacements.

Parameter Comparison

Parameter	STP16DPP05XTTR	TLC5923RHBT	TLC5923DAPR	TLC5921DAPR	TLC5924DAP	TLC5926IDWR	TLC59283RGET	TLC5929DBQ
Manufacturer	STMicroelectronics	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Type	Linear	Linear	Linear	Linear	Linear	Linear	Linear	Linear
Topology	Shift Register	Shift Register	Shift Register	Shift Register	Shift Register	Shift Register	Shift Register	Shift Register
Number of Outputs	16	16	16	16	16	16	16	16
Internal Switch(s)	Yes	Yes	Yes	Yes	Yes	-	Yes	Yes
Current - Output / Channel	40mA	80mA	80mA	80mA	80mA	120mA	45mA	50mA
Voltage - Supply (Min)	3V	3V	3V	4.5V	3V	3V	3V	3V
Voltage - Supply (Max)	5.5V	5.5V	5.5V	5.5V	5.5V	5.5V	5.5V	5.5V
Voltage - Output	20V	17V	17V	17V	15V	17V	10V	10V
Frequency	30MHz	30MHz	30MHz	20MHz	30MHz	30MHz	35MHz	20MHz
Operating Temperature (Min)	-40°C	-40°C	-40°C	-20°C	-40°C	-40°C	-40°C	-40°C
Operating Temperature (Max)	125°C	85°C	85°C	85°C	85°C	85°C	85°C	85°C
Package / Case	24-TSSOP Exposed Pad	32-VFQFN Exposed Pad	32-PowerTSSOP	32-PowerTSSOP	32-PowerTSSOP	24-SOIC	24-VFQFN Exposed Pad	24-SSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Shift Register Substitutes (Pin-Compatible Topology):

The following parts maintain full compatibility with the STP16DPP05XTTR shift register protocol and can serve as direct functional replacements:

TLC5923RHBT (Texas Instruments): Matches the STP16DPP05XTTR in supply voltage range (3V to 5.5V), frequency (30MHz), and operating temperature minimum (-40°C). Output current of 80mA exceeds the 40mA baseline, providing headroom for higher-brightness LED applications. Package change from 24-TSSOP to 32-VQFN requires PCB layout modification. ROHS3 compliant and active product status.

TLC5923DAPR (Texas Instruments): Identical electrical specifications to TLC5923RHBT with supply voltage 3V to 5.5V and 30MHz frequency. Output current of 80mA provides current margin. Package is 32-PowerTSSOP, requiring PCB redesign. ROHS3 compliant and active product status.

TLC5924DAP (Texas Instruments): Supports 3V to 5.5V supply range and 30MHz frequency. Output current of 80mA exceeds baseline. Output voltage of 15V is lower than the STP16DPP05XTTR's 20V specification; verify application requirements. 32-PowerTSSOP package requires layout modification. ROHS3 compliant and active product status.

TLC5926IDWR (Texas Instruments): Operates at 3V to 5.5V supply and 30MHz frequency. Output current of 120mA provides significant current capacity. Package is 24-SOIC, maintaining similar form factor to original. Internal switches specification differs (not specified); verify for direct LED driving applications. ROHS3 compliant and active product status.

TLC59283RGET (Texas Instruments): Supports 3V to 5.5V supply range and 35MHz frequency. Output current of 45mA closely matches the 40mA baseline. Output voltage of 10V is lower than the STP16DPP05XTTR; verify application compatibility. 24-VQFN package requires PCB layout modification. ROHS3 compliant and active product status.

TLC5929DBQ (Texas Instruments): Operates at 3V to 5.5V supply and 20MHz frequency. Output current of 50mA exceeds baseline. Output voltage of 10V is lower than the STP16DPP05XTTR; verify application requirements. 24-SSOP package maintains similar footprint. ROHS3 compliant and active product status.

TLC5921DAPR (Texas Instruments): Supply voltage range of 4.5V to 5.5V is narrower than the STP16DPP05XTTR's 3V minimum; not suitable for 3V applications. Output current of 80mA and 20MHz frequency are acceptable. Operating temperature maximum of 85°C is lower than the STP16DPP05XTTR's 125°C. 32-PowerTSSOP package requires layout modification. ROHS3 compliant and active product status.

Alternative Topology Parts (Functional Alternatives, Not Direct Substitutes):

PCA9532PW,112 (NXP USA Inc.): I2C control topology differs fundamentally from shift register protocol; requires firmware and PCB redesign. 16 outputs and 25mA current capacity. Supply voltage range 2.3V to 5.5V. 24-TSSOP package maintains form factor. ROHS3 compliant and active product status. Use only when I2C control is required.

TLC5904PZP (Texas Instruments): Higher output current (80mA, 120mA) and different package (100-HTQFP) require significant redesign. Supply voltage range 4.5V to 5.5V excludes 3V operation. Shift register topology maintains protocol compatibility. ROHS3 compliant and active product status.

TLC59116IRHBR (Texas Instruments): I2C control topology differs from shift register; requires firmware redesign. 120mA output current and 3V to 5.5V supply range. 32-VQFN package requires layout modification. ROHS3 compliant and active product status. Use only when I2C control is required.

Frequently Asked Questions (FAQ)

Q: Can TLC5923RHBT replace STP16DPP05XTTR in a direct pin-for-pin substitution?

A: No. While both devices are 16-output linear shift register LED drivers with identical electrical specifications (3V to 5.5V supply, 30MHz frequency), the TLC5923RHBT uses a 32-VQFN package compared to the STP16DPP05XTTR's 24-TSSOP package. Pin count and pinout differ, requiring PCB layout modification. Functional compatibility is maintained for shift register protocol operation.

Q: What is the primary difference between shift register and I2C control topologies?

A: Shift register devices (STP16DPP05XTTR, TLC5923RHBT, TLC5924DAP) accept serial data input and require clock and latch signals for LED control. I2C devices (PCA9532PW,112, TLC59116IRHBR) use two-wire I2C protocol for communication. These topologies are not interchangeable without firmware and hardware redesign.

Q: Is the TLC5921DAPR suitable for 3V supply applications?

A: No. The TLC5921DAPR minimum supply voltage is 4.5V, which exceeds the 3V minimum requirement of the STP16DPP05XTTR. Use only in applications with 4.5V or higher supply voltage.

Q: How does output current rating affect LED brightness?

A: Output current rating determines the maximum current each channel can deliver to an LED. The STP16DPP05XTTR provides 40mA per channel. Substitute parts with higher ratings (50mA to 120mA) allow brighter LEDs or more LEDs per channel. Lower-rated substitutes may limit brightness. Verify LED current requirements before substitution.

Q: Can I use TLC5926IDWR as a substitute if internal switches are not specified?

A: The TLC5926IDWR specification does not explicitly confirm internal switches. Verify with the device datasheet whether external switching circuitry is required. The STP16DPP05XTTR includes internal switches for direct LED driving without external components.

Q: What is the significance of operating temperature range differences?

A: The STP16DPP05XTTR operates to 125°C maximum, while most Texas Instruments substitutes operate to 85°C maximum. For applications requiring operation above 85°C, the STP16DPP05XTTR or equivalent high-temperature devices are required. For standard applications (0°C to 70°C ambient), the 85°C maximum is acceptable.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All substitute parts listed in this document are ROHS3 compliant and maintain regulatory compliance equivalent to the STP16DPP05XTTR.

Q: What package considerations apply when selecting a substitute?

A: Package selection affects PCB layout, board space, and assembly process. The STP16DPP05XTTR uses 24-TSSOP (0.173" width). Substitutes use 24-TSSOP, 24-SOIC, 24-SSOP, 24-VQFN, 32-VQFN, or 32-PowerTSSOP packages. Smaller packages (VQFN) reduce board space but require fine-pitch assembly capability. Larger packages (PowerTSSOP) improve thermal performance. Verify assembly equipment compatibility before package selection.

Q: Can output voltage differences affect substitution suitability?

A: Yes. The STP16DPP05XTTR supports 20V output, while substitutes range from 10V to 17V. Output voltage determines the maximum LED forward voltage that can be driven. Applications requiring LEDs with forward voltages above 17V require the STP16DPP05XTTR or equivalent high-voltage devices. Verify LED specifications before substitution.

Q: Is frequency rating critical for LED driver selection?

A: Frequency rating indicates the maximum shift register clock speed. The STP16DPP05XTTR operates at 30MHz. Substitutes range from 15MHz to 35MHz. Higher frequencies allow faster data throughput for multiple LED updates. Lower frequencies are acceptable for standard applications. Verify system clock requirements before substitution.

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