STMicroelectronics STP08DP05TTR

Overview

STP08DP05TTR from STMicroelectronics is an 8-bit constant-current LED sink driver with integrated open/short output error detection, serial-in/parallel-out shift register architecture, and adjustable current (5–100 mA per channel) via external R_EXT. It operates from 3.0–5.5 V, supports 30 MHz clocking, and delivers up to 20 V output swing for driving multiple LEDs in series - used in LED signage, industrial panel displays, and automotive interior lighting.

For engineers reviewing the STP08DP05TTR datasheet, STP08DP05TTR pinout, STP08DP05TTR application, or STP08DP05TTR equivalent, key selection criteria include its dual-mode operation (normal drive + error detection), thermal performance in TSSOP-16 exposed-pad package, 8-channel current matching accuracy (±1.5% between bits), and compatibility with 3.3 V microcontrollers without level shifting.

Technical Context

The STP08DP05TTR integrates an 8-bit shift register cascaded with an 8-bit D-type storage latch, enabling synchronous serial data loading and parallel output latching. Its output stage comprises eight matched, thermally stable current sinks with programmable compliance up to 20 V.

Error detection operates in a dedicated mode entered via a 5-cycle logic sequence on OE/DM2 and LE/DM1, allowing real-time monitoring of short-to-GND, short-to-V_O, and open-circuit conditions on all eight outputs - results are shifted out serially via SDO without additional pins.

Key Specifications

Pinout & Package

TSSOP-16 package with exposed thermal pad (JEDEC MO-153 variant); pad must be soldered to PCB ground plane or isolated copper pour 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 STP08DP05TTR uniquely combines 8-channel precision current sinking, integrated fault detection, and 3.3 V microcontroller compatibility in a thermally optimized TSSOP package - making it optimal for cost-sensitive, safety-aware LED panel designs requiring autonomous diagnostics.

Availability

STP08DP05TTR is available at Aetrix Electronics and suitable for LED signage, industrial HMI displays, and automotive interior lighting requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for STP08DP05TTR 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The STP08DP05 belongs to ST's LED driver product line, engineered specifically for high-reliability, low-voltage LED panel applications where thermal efficiency, fault resilience, and microcontroller interoperability are critical design requirements.

FAQ

What is the function of the exposed thermal pad on the STP08DP05TTR package?

The exposed pad on the STP08DP05TTR is electrically connected to GND and serves as the primary thermal path from the die to the PCB. When soldered to a large copper pour or internal ground plane, it reduces junction-to-ambient thermal resistance to 37.5 °C/W - enabling sustained 100 mA/channel operation at +85 °C ambient without derating. It must not be left floating or insulated.

How does the STP08DP05TTR enter and exit error detection mode?

Entry requires a precise 5-cycle logic sequence on OE/DM2 and LE/DM1 pins synchronized to CLK: OE/DM2 = H,L,H,H,H and LE/DM1 = L,L,L,H,L. After the fifth CLK, the device enters detection mode on the sixth rising edge. Exit uses a separate 5-cycle sequence: OE/DM2 = H,L,H,H,H and LE/DM1 = L,L,L,L,L. Both sequences are defined in Section 10 of the datasheet.

Can the STP08DP05TTR drive LEDs with forward voltages exceeding 5 V?

Yes - the STP08DP05TTR guarantees 20 V output voltage capability per channel, allowing series connection of up to six typical white LEDs (3.2 V each) or ten red LEDs (2.0 V each). This headroom is essential for maintaining regulation across LED V_F variation and temperature drift, provided the total V_F remains ≤20 V and R_EXT is selected to limit current within 5–100 mA.

What is the minimum pulse width requirement for LE/DM1 and OE/DM2 signals?

The minimum pulse width for LE/DM1 is 20 ns (at V_DD = 3.0–5.0 V), and for OE/DM2 it is 200 ns. These values ensure reliable latching and mode transitions, especially during high-speed operation or cascade configurations. Violating these timings may cause incomplete data transfer or failure to enter detection mode, as verified in Table 6 (Recommended Operating Conditions).