STMicroelectronics STP08DP05XTTR

Overview

STP08DP05XTTR from STMicroelectronics is an 8-bit constant-current LED sink driver with integrated open/short output error detection, designed for LED panel displays and signage systems. It delivers 5–100 mA per channel via external R_EXT, supports 30 MHz serial clocking, operates from 3.0–5.5 V supply, and features dual-mode pin functionality (LE/DM1 and OE/DM2) for seamless detection mode entry without additional pins.

For engineers reviewing the STP08DP05XTTR datasheet, STP08DP05XTTR pinout, STP08DP05XTTR application, or STP08DP05XTTR equivalent, key selection considerations include its 8-channel sink architecture, thermal-enhanced TSSOP-16 exposed-pad package, real-time fault reporting via SDO, adjustable current accuracy (±1.5% between bits), and compatibility with 3.3 V microcontrollers in high-density LED matrix designs.

Technical Context

The STP08DP05XTTR integrates an 8-bit serial-in/parallel-out shift register cascaded with an 8-bit D-type storage latch, feeding eight matched, thermally stable current-regulated sinks. Its detection logic uses a three-phase sequence on OE/DM2 and LE/DM1 to enter error mode-sampling open, short-to-GND, and short-to-V_O conditions without interrupting normal data flow.

Each output provides up to 20 V compliance voltage, enabling series-connected LEDs per channel; current is set by a single external resistor (R_EXT) with typical accuracy of ±1.5% between channels at VO ≥ 1.3 V. The device implements thermal shutdown at ~170 °C and offers ESD protection rated at 2.5 kV HBM and 200 V MM.

Key Specifications

Pinout & Package

STP08DP05XTTR is housed in a thermally enhanced HTSSOP-16 (TSSOP-16 exposed pad) package. The exposed pad must be electrically connected to PCB ground or isolated metal land for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC59283RTJR and MAX7219CWG+, the STP08DP05XTTR uniquely combines per-channel fault detection, 20 V output compliance, and thermal-enhanced packaging - making it optimal for reliability-critical, high-density LED signage where failure isolation and thermal margin are design priorities.

Availability

STP08DP05XTTR is available at Aetrix Electronics and suitable for LED video walls, industrial status displays, and transportation signage requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for STP08DP05XTTR 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 solutions with over 45 years of analog and mixed-signal IC expertise.

The STP08DP05XTTR belongs to ST's LED driver portfolio, engineered specifically for high-reliability, thermally constrained LED display systems requiring integrated diagnostics and scalable serial architecture.

FAQ

What is the minimum R_EXT value supported, and what output current does it produce?

The minimum recommended R_EXT is 124 Ω, which sets the maximum output current to 130 mA per channel at V_DD = 5 V and T_A = 25 °C. This value is validated in the datasheet's Figure 11 and Table 10. Operation above 100 mA is possible but requires careful thermal derating due to increased power dissipation in the exposed-pad package.

How does the device report open-circuit faults, and what MCU interface is required?

Open-circuit faults are reported as logic '0' bits shifted out via the SDO pin during detection mode - one bit per channel (OUT0–OUT7). The MCU must execute the 5-cycle OE/DM2 and LE/DM1 sequence, then read 8 bits from SDO using standard SPI or GPIO bit-banging. No additional ADC or comparator circuitry is needed.

Can STP08DP05XTTR drive RGB LEDs, and what is the maximum number per channel?

Yes - each OUTx channel can drive a series string of monochrome LEDs. With 20 V output compliance and typical forward voltages of 2.0–3.5 V, up to 6 red (2.0 V), 5 green (2.2 V), or 5 blue (3.2 V) LEDs can be driven per channel. RGB pixel control requires three STP08DP05XTTRs (one per color) or multiplexed sequencing.

Is the exposed thermal pad electrically isolated, and how should it be connected on the PCB?

The exposed pad is internally connected to GND and must be soldered to a dedicated PCB copper pour tied to the system ground plane. Per Figure 1 and Table 16, this connection is mandatory to achieve the specified R_thJA = 37.5 °C/W. Leaving it floating or connecting to a non-ground net degrades thermal performance and risks device overheating under full load.