STMicroelectronics STP16DPS05XTTR

Overview

STP16DPS05XTTR from STMicroelectronics is a 16-bit constant-current LED sink driver with integrated open/short error detection, designed for LED panel displays and signage systems. It delivers 20–100 mA per channel via external R_EXT, supports 30 MHz serial clocking, operates from 3–5.5 V supply, and features TSSOP24 exposed pad package for enhanced thermal dissipation.

For engineers reviewing the STP16DPS05XTTR datasheet, STP16DPS05XTTR pinout, STP16DPS05XTTR application, or STP16DPS05XTTR equivalent, key selection criteria include output current adjustability (via R_EXT), real-time LED fault reporting without extra pins, auto power-saving mode, 20 V output voltage capability, and compatibility with 3.3 V microcontrollers.

Technical Context

The device integrates a 16-bit serial-in/parallel-out shift register feeding a 16-bit D-type latch, driving sixteen regulated current sinks. Its detection logic uses dual-function pins (LE/DM1 and OE/DM2) to enter/exit error mode without additional I/O, sampling all 16 outputs for open-circuit, short-to-GND, or short-to-V_O conditions in one sequence.

Current regulation is set by an external resistor connected to R-EXT, enabling precise per-channel current control from 5 mA to 100 mA. The auto power-saving feature reduces quiescent current to 163 µA after 16 clock cycles with no data change, restoring full operation on next latch event.

Key Specifications

Pinout & Package

TSSOP24 exposed pad package (JEDEC MO-153 variant) with thermally enhanced copper land under die; exposed pad must be electrically connected to PCB ground plane 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 STP16DP05PTR, STP16DPS05XTTR offers 32% lower thermal resistance for sustained 100 mA/channel operation; versus TLC59283DBQR, it eliminates external fault circuitry and reduces firmware complexity by embedding detection logic into the same 24-pin footprint.

Availability

STP16DPS05XTTR is available at Aetrix Electronics and suitable for LED video walls, industrial HMIs, architectural lighting controls, and transportation signage requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for STP16DPS05XTTR 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 STP16DPS05 product line targets high-reliability LED display systems requiring integrated diagnostics, thermal resilience, and seamless microcontroller interfacing - emphasizing fault-awareness and energy efficiency in space-constrained designs.

FAQ

What is the function of the R-EXT pin?

The R-EXT pin connects to an external resistor that sets the reference current for all 16 output channels. Using values from 240 Ω to 3.9 kΩ, it programs output current between 5 mA and 100 mA. The relationship is inverse: lower resistance yields higher current. This single-point adjustment ensures channel-to-channel matching within ±1.5% at 25 °C.

How does the open/short detection mode work without extra pins?

Detection uses a three-phase sequence triggered by specific timing on OE/DM2 and LE/DM1 pins over five clock cycles. During phase two, all outputs are driven ON, and internal comparators monitor each channel for abnormal current or voltage. Results shift out via SDO in the same 16-bit format used for LED data - no additional I/O or external components required.

Can STP16DPS05XTTR drive LEDs directly from a 3.3 V MCU without level shifters?

Yes. All digital inputs (CLK, SDI, LE/DM1, OE/DM2) accept 3.3 V logic levels with VIH ≥ 0.7 × VDD and VIL ≤ 0.3 × VDD. With VDD = 3.3 V, the device operates fully within 3.3 V logic margins - no level translation is needed for microcontroller interfacing, simplifying PCB routing and reducing component count.

What thermal benefits does the exposed pad provide?

The exposed pad reduces junction-to-ambient thermal resistance from 55 °C/W (standard TSSOP24) to 37.5 °C/W - a 32% improvement. When soldered to a 100 mm² copper pour tied to GND, it enables continuous 100 mA/channel operation at 125 °C ambient. Without proper pad connection, thermal performance degrades to standard TSSOP levels, risking thermal shutdown above 85 °C ambient.