STMicroelectronics STP16CPP05XTTR

Overview

STP16CPP05XTTR from STMicroelectronics is a 16-bit constant-current LED sink driver in TSSOP-24 exposed pad package, delivering precise 3–40 mA per channel with ±1.5% inter-channel current accuracy at 25 °C, 30 MHz max clock frequency, and 20 V output voltage capability for driving multi-LED strings in signage and panel displays.

For engineers reviewing the STP16CPP05XTTR datasheet, STP16CPP05XTTR pinout, STP16CPP05XTTR application, or STP16CPP05XTTR equivalent, this device supports high-speed serial-in/parallel-out LED control with thermal shutdown, Schmitt-trigger inputs, and external R_EXT-based current programming - critical for brightness-consistent, thermally robust LED matrix designs.

Technical Context

The STP16CPP05XTTR integrates a 16-bit shift register cascaded to a 16-bit D-type storage latch, enabling synchronous data loading and output latching. Its output stage comprises sixteen matched, thermally compensated current sinks with 40 ns typical current setup time.

It operates from 3.3 V or 5 V supply, supports active-low output enable (OE), and features internal thermal shutdown at 170 °C. The exposed thermal pad reduces R_thJA to 37.5 °C/W, enabling sustained 40 mA/channel operation under industrial ambient conditions.

Key Specifications

Pinout & Package

TSSOP-24 exposed pad package with 0.65 mm pitch; thermal pad must be soldered to PCB copper for optimal heat dissipation (R_thJA = 37.5 °C/W).

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 STP16CPP05XTTR uniquely combines 30 MHz data rate, ±1.5% current matching, thermal shutdown, and 20 V compliance - making it the only choice for high-reliability, high-density LED signage requiring both precision and safety.

Availability

STP16CPP05XTTR is available at Aetrix Electronics and suitable for indoor LED signage, automotive interior lighting, industrial HMI panels, and architectural LED strips requiring stable component supply and long-lifecycle support.

Supply support for STP16CPP05XTTR 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 analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The STP16CPP05XTTR belongs to ST's LED driver product line, engineered specifically for high-channel-count, constant-current LED matrix control in commercial and industrial display systems demanding precision, thermal resilience, and long-term supply stability.

FAQ

What is the minimum R_EXT value for 40 mA output per channel?

The datasheet specifies 497 Ω as the R_EXT value yielding 40 mA output current at 25 °C. Using a lower resistance risks exceeding absolute maximum ratings and invalidates current accuracy guarantees. For production use, 497 Ω ±1% metal-film resistor is recommended to maintain ±1.5% inter-channel matching.

Can STP16CPP05XTTR drive LEDs directly from a 3.3 V microcontroller GPIO?

Yes - its Schmitt-trigger inputs accept 3.3 V logic levels (VIH ≥ 0.7 × VDD), and it operates natively from 3.3 V supply. No level-shifting is required when interfacing with STM32, NXP Kinetis, or other 3.3 V MCUs, simplifying PCB layout and reducing component count.

How does the exposed thermal pad affect PCB layout requirements?

The exposed pad must be soldered to a dedicated thermal land connected to ≥4 internal copper layers or a large external copper pour. ST recommends a 5×5 mm thermal pad with 9 vias (0.3 mm diameter) to ground plane. Failure to implement this reduces R_thJA from 37.5 °C/W to >85 °C/W, risking thermal shutdown at >20 mA/channel.

Is daisy-chaining multiple STP16CPP05XTTR devices supported in hardware?

Yes - the SDO pin provides registered, edge-aligned serial output synchronized to CLK, enabling reliable cascading of up to 16 devices without external buffering. Timing analysis confirms t_PLH(CLK→SDO) ≤ 14 ns at 5 V, allowing 30 MHz operation across 4-device chains with margin.