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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

STMicroelectronics STAP08DP5XTTR

Name: STAP08DP5XTTR
Brand: STMicroelectronics
SKU: STAP08DP5XTTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STAP08DP5XTTR

Manufacturer:: STMicroelectronics

Category:: LED Drivers

Package:: 16-TSSOP (0.173", 4.40mm Width) Exposed Pad

Datasheet:: STAP08DP5XTTR.pdf

Description:: IC LED DRVR LINEAR 100MA 16TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STAP08DP5XTTR from STMicroelectronics is an AEC-Q100 qualified 8-bit constant-current LED sink driver for automotive lighting systems. It delivers regulated 5–100 mA per channel via external R_EXT, supports short/open output error detection without extra pins, and operates from 3.0–5.5 V supply - enabling direct interface with 3.3 V microcontrollers in dashboard backlighting applications.

For engineers reviewing the STAP08DP5XTTR datasheet, STAP08DP5XTTR pinout, STAP08DP5XTTR application, or STAP08DP5XTTR equivalent, this device is selected for high-reliability LED current control with integrated diagnostics, thermal-efficient TSSOP-16 exposed-pad packaging, and 30 MHz serial data throughput in space-constrained automotive modules.

Technical Context

The STAP08DP5XTTR integrates an 8-bit serial-in/parallel-out shift register feeding an 8-bit D-type storage register, driving eight independent constant-current sinks. Its detection circuitry monitors each output for open-circuit, short-to-GND, and short-to-V_O conditions using dedicated logic on OE/DM2 and LE/DM1 pins - entering and exiting detection mode via defined 5-clock sequences without interrupting normal operation.

Current regulation is set by a single external resistor (R_EXT), enabling precise 5–100 mA per channel with ±1.5% channel-to-channel accuracy at V_O ≥ 1.3 V. The device supports 20 V output voltage swing, allowing up to 6–7 LEDs in series per channel at typical forward voltages, and features 37.5 °C/W junction-to-ambient thermal resistance when the exposed pad is soldered to PCB ground.

Key Specifications

Parameter	Value and Actual Design Meaning
Output channels	8 independent constant-current sinks, each programmable 5–100 mA via R_EXT
Supply voltage	3.0–5.5 V - enables direct use with 3.3 V MCUs and compatibility with automotive 5 V rails
Output voltage range	Up to 20 V - supports driving multiple LEDs in series (e.g., 6× 3.2 V white LEDs)
Max clock frequency	30 MHz - ensures fast serial data loading for dynamic brightness updates in infotainment displays
Current accuracy	±1.5% channel-to-channel at V_O ≥ 1.3 V - maintains uniform LED brightness across all 8 channels
Thermal resistance	37.5 °C/W (R_thJA) - requires exposed pad soldering to PCB for rated thermal performance
Error detection	Detects open, short-to-GND, and short-to-V_O per channel - reports status via SDO without added pins

Pinout & Package

Package: HTSSOP16 exposed pad (TSSOP-16 with thermal pad), RoHS-compliant, ECOPACK®2 grade.

Pin/Terminal	Circuit Role	Design Meaning
1 GND	Ground reference	Primary return path for all output currents and internal logic; must be low-impedance connection
2 SDI	Serial data input	Accepts 3.3 V–compatible logic-level data for shift register loading
3 CLK	Serial clock input	30 MHz max edge-triggered clock synchronizing data into shift register
4 LE/DM1	Latch input / Detection Mode 1	Latches shift register to output register; also initiates detection mode entry/exit sequence
5–12 OUT0–OUT7	Constant-current sink outputs	Each drives LED cathodes with user-programmed current; supports 20 V compliance
13 OE/DM2	Output enable / Detection Mode 2	Active-low output control; second pin in 5-cycle logic sequence for detection mode control
14 SDO	Serial data output	Shifts out 8-bit error status or normal data; compatible with 3.3 V MCU inputs
15 R-EXT	Current programming node	Connects external resistor to set all 8 output currents simultaneously (e.g., 3930 Ω → 10 mA)
16 VDD	Power supply	3.0–5.5 V input; powers logic and output stages; decoupling capacitor required near pin

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualification	Validated for automotive ambient temperatures (−40 °C to +125 °C junction), ensuring reliability in dashboard and exterior lighting
Integrated open/short detection	Per-channel fault reporting via SDO within 1 µs - eliminates need for external sense resistors or ADC monitoring
3.3 V logic compatibility	Full operation with 3.3 V microcontrollers on SDI, CLK, LE/DM1, OE/DM2, and SDO - no level-shifting required
High thermal efficiency package	TSSOP-16 with exposed pad reduces R_thJA to 37.5 °C/W - enables 100 mA/channel operation at +85 °C ambient with proper PCB layout
Adjustable PWM dimming	0–100% brightness control via OE/DM2 pin - supports analog dimming without external PWM generator

Applications

Dashboard Backlighting

Infotainment Display Lighting

Use Scenario: Driving segmented LCD backlight zones in instrument clusters with variable brightness per zone.

IC Role / Device Role / Timing Role: Constant-current sink for 8 independent LED strings; provides uniform luminance and real-time open-circuit detection to prevent partial display failure.

Use Value: Enables fail-safe backlight operation - detects and reports individual LED string opens before driver IC shutdown, supporting ASIL-B diagnostic coverage.

Use Scenario: Powering RGB LED arrays behind touch-sensitive center-stack displays for dynamic UI feedback.

IC Role / Device Role / Timing Role: Serially controlled 8-channel current sink; accepts rapid SPI-like updates at 30 MHz to synchronize color/brightness changes with GUI rendering.

Use Value: Eliminates discrete current-setting resistors per channel - reduces BOM count and PCB area while maintaining ±1.5% current matching across colors.

Daytime Running Lights (DRL)

Interior Ambient Lighting

Use Scenario: Driving linear LED strings in front-end DRL modules requiring precise current regulation and thermal robustness.

IC Role / Device Role / Timing Role: High-voltage (20 V) sink driver supporting 5–7 LEDs in series per channel; uses R_EXT to set 80 mA nominal current per string.

Use Value: Delivers stable light output over −40 °C to +105 °C ambient - avoids current drift-induced intensity variation during cold starts or under-hood heat soak.

Use Scenario: Controlling multi-zone footwell and door-handle LED lighting with independent dimming and fault reporting.

IC Role / Device Role / Timing Role: Low-voltage (3 V min) LED driver enabling direct integration with body-control module's 3.3 V domain; supports diagnostic readback via SDO.

Use Value: Reduces system-level diagnostics complexity - replaces 8 discrete current regulators and 8 sense lines with one serial interface and built-in error flags.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED sink driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLC59116IPWPR	I²C interface, 16-channel, no built-in open/short detection, max 120 mA/channel, 5.5 V supply only	Requires I²C master and external fault monitoring; better suited for non-automotive consumer lighting	Select if I²C bus integration and higher channel count outweigh need for embedded diagnostics
MAX7219CWG+	Common-cathode LED matrix driver, 8×8 segments, no current sink per pin, no open/short detection, 5.5 V only	Designed for 7-segment/LED matrix displays, not linear LED strings; lacks per-output current programming	Choose only for alphanumeric display panels - not a functional replacement for constant-current sink applications

Compared with TLC59116IPWPR and MAX7219CWG+, the STAP08DP5XTTR uniquely combines AEC-Q100 qualification, per-channel open/short detection, 3.0 V operation, and serial-in/parallel-out architecture - making it the only drop-in solution for automotive LED backlighting requiring ISO 26262-aligned diagnostics and thermal resilience.

Availability

STAP08DP5XTTR is available at Aetrix Electronics and suitable for dashboard backlighting, exterior DRL modules, and infotainment display lighting requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.

Supply support for STAP08DP5XTTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with broad manufacturing and quality certifications.

The STAP08DP5XTTR belongs to ST's automotive LED driver product line, engineered specifically for AEC-Q100-compliant interior/exterior lighting systems where diagnostic integrity, thermal efficiency, and 3.3 V MCU interoperability are mandatory.

FAQ

What is the minimum supply voltage required for full functionality?

The STAP08DP5XTTR operates fully from 3.0 V to 5.5 V. At 3.0 V, all specifications including 30 MHz clock operation, 5–100 mA output current range, and error detection remain valid per datasheet Table 6. This enables direct use with 3.3 V automotive microcontrollers without level shifting or boost circuitry.

How does the open/short detection mode interact with normal LED driving?

Detection mode is entered and exited via a 5-clock-cycle logic sequence on OE/DM2 and LE/DM1 pins - it suspends normal LED driving temporarily. During detection, all outputs are forced ON, and fault status (open, short-to-GND, short-to-V_O) is captured and shifted out via SDO within 1 µs. Normal operation resumes immediately after the sequence completes.

Can the STAP08DP5XTTR drive LEDs in series, and what is the maximum string voltage?

Yes - each OUTx pin supports up to 20 V output voltage swing relative to GND. With typical white LED forward voltages of ~3.2 V, this allows up to six 3.2 V LEDs (19.2 V total) in series per channel. The 20 V rating ensures margin for temperature-induced V_F drift and transient spikes in automotive environments.

Is the exposed thermal pad electrically isolated or grounded?

The exposed pad is electrically isolated from internal circuitry per datasheet Note in Section 1.1. It must be soldered to a PCB thermal pad connected to system ground to achieve the specified 37.5 °C/W R_thJA. No internal electrical connection exists - grounding is purely for thermal conduction and mechanical stability.

STAP08DP5XTTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 16-TSSOP (0.173", 4.40mm Width) Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Linear

Topology:: Shift Register

Internal Switch(s):: Yes

Number of Outputs:: 8

Voltage - Supply (Min):: 3V

Voltage - Supply (Max):: 5.5V

Voltage - Output:: 20V

Current - Output / Channel:: 100mA

Frequency:: 30MHz

Dimming:: -

Applications:: Backlight, Lighting

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-TSSOP-EP

STAP08DP5XTTR FAQ

1.How can I place an order for STAP08DP5XTTR through Aetrix?

Please submit a Request for Quotation (RFQ) for STAP08DP5XTTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STAP08DP5XTTR reliable?

The price and inventory of STAP08DP5XTTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STAP08DP5XTTR is usually 5 days.

3.What payment methods are accepted for STAP08DP5XTTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STAP08DP5XTTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STAP08DP5XTTR?

STAP08DP5XTTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STAP08DP5XTTR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STAP08DP5XTTR?

For technical support, including STAP08DP5XTTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STAP08DP5XTTR requirements.

6.How does Aetrix verify that STAP08DP5XTTR is sourced from the original manufacturer or authorized distributors?

All STAP08DP5XTTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STAP08DP5XTTR meets industry standards.

7.What is the process for return or replacement of STAP08DP5XTTR?

All STAP08DP5XTTR units undergo pre-shipment inspection (PSI). If there is an issue with STAP08DP5XTTR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STAP08DP5XTTR part is unused and in its original packaging.

Return procedure for STAP08DP5XTTR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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