STMicroelectronics STP16CPP05MTR

Overview

STP16CPP05MTR from STMicroelectronics is a 16-bit constant-current LED sink driver in SO-24 package, designed for serial-in/parallel-out LED panel control with adjustable output current (3–40 mA), 30 MHz max clock frequency, and 20 V output voltage capability. It operates from 3.3 V or 5 V supply and features Schmitt-trigger inputs, thermal shutdown, and ±1.5% channel-to-channel current accuracy at 25 °C.

For engineers reviewing the STP16CPP05MTR datasheet, STP16CPP05MTR pinout, STP16CPP05MTR application, or STP16CPP05MTR equivalent, key selection factors include output current programmability via R_EXT, cascade-compatible timing, latch-controlled parallel update, and SO-24 thermal performance (R_thJA = 60 °C/W).

Technical Context

The STP16CPP05MTR integrates a 16-bit shift register followed by a D-type storage latch, enabling synchronous data loading and simultaneous output update. Its output stage uses sixteen matched current sources with external resistor (R_EXT) programming - current accuracy is ±1.5% between channels and ±5% across devices at 25 °C.

Control logic includes active-low OE for global output disable, LE for latch enable, and Schmitt-triggered CLK/SDI/SDO for noise-immune serial interface. Thermal shutdown activates at 170 °C, and ESD protection meets 2 kV HBM standard.

Key Specifications

Pinout & Package

STP16CPP05MTR is housed in a 24-pin SOIC (SO-24) package with exposed pad option not applicable to this variant; thermal resistance is 60 °C/W (junction-to-ambient). Pin 1 is GND; pins 5–20 are current-sink outputs (OUT0–OUT15); pin 23 connects to R_EXT for current calibration.

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 STP16CPP05MTR offers superior channel count scalability, deterministic latch-based timing for video synchronization, and higher output voltage headroom - making it optimal for large-area LED signage and industrial panel applications requiring analog current precision.

Availability

STP16CPP05MTR is available at Aetrix Electronics and suitable for LED video wall drivers, industrial HMI displays, automotive dashboard clusters, and POS terminal status indicators requiring stable component supply and long-term production support.

Supply support for STP16CPP05MTR 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 power management, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.

The STP16CPP05 belongs to ST's LED driver product line, engineered specifically for high-reliability, constant-current LED array control in display and lighting systems demanding precision, thermal resilience, and serial interface efficiency.

FAQ

What is the minimum external resistor value for 40 mA output current?

According to Table 11 in the datasheet, a 497 Ω R_EXT sets nominal 40 mA output current at V_DD = 5 V and T_A = 25 °C. At 3.3 V supply, 490 Ω achieves the same target. Resistor tolerance directly impacts current accuracy - use 1% metal-film for ±1.5% channel matching.

Can STP16CPP05MTR drive LEDs in common-anode configuration?

Yes - STP16CPP05MTR is a sink driver, so it must be used with common-anode LED arrays. Each OUT pin connects to an LED cathode; the anodes tie to a shared positive rail (≤20 V). This configuration enables simple current regulation without high-side switching complexity.

How does thermal shutdown interact with continuous 40 mA operation?

Thermal shutdown triggers at 170 °C junction temperature. With R_thJA = 60 °C/W (SO-24), dissipating 640 mW (16 × 40 mA × 1 V dropout) raises junction temperature by ~38 °C above ambient. At 85 °C ambient, junction reaches ~123 °C - well below shutdown, confirming safe continuous operation with adequate PCB copper area.

Is daisy-chaining multiple STP16CPP05MTR devices supported?

Yes - SDO (pin 22) outputs the shifted-out LSB of the internal shift register, allowing seamless cascade with SDI of the next device. The datasheet specifies 30 MHz max clock for standalone use; in cascade, timing margins require verification using t_PLH/t_PHL values (e.g., 24–58 ns) and setup/hold times (5–15 ns) to avoid bit errors.