STMicroelectronics STP16CP05MTR

Overview

STP16CP05MTR from STMicroelectronics is a 16-channel constant-current LED sink driver IC with serial-in/parallel-out shift register architecture, designed for LED panel displays. It operates from 3.0 V to 5.5 V, delivers adjustable output current (5–100 mA per channel) via external R_EXT, supports 30 MHz clock frequency, and guarantees 20 V output driving capability for series-connected LEDs.

For engineers reviewing the STP16CP05MTR datasheet, STP16CP05MTR pinout, STP16CP05MTR application, or STP16CP05MTR equivalent, key selection considerations include per-channel current accuracy (±1.5% between bits), thermal performance in SO-24 package (R_thJA = 42.7 °C/W), latch/enable timing margins, and compatibility with 3.3 V microcontroller interfaces.

Technical Context

The device integrates a 16-bit shift register cascaded to a 16-bit D-type storage latch, enabling synchronous data loading and output latching. Output enable (OE/DM2, active-low) and latch (LE/DM1, level-sensitive) are independent control inputs - OE disables all outputs globally, while LE transfers shift-register data to the output stage without clock synchronization.

Each of the 16 output channels uses a regulated current source with programmable magnitude set by a single external resistor (R_EXT). Dropout voltage remains low (e.g., 880 mV at 100 mA, V_DD = 5 V), and output rise/fall times are under 68 ns (V_DD = 3.3 V), supporting high-refresh-rate LED multiplexing.

Key Specifications

Pinout & Package

STP16CP05MTR is packaged in SO-24 (ECOPACK® compliant), featuring a standard 300 mil wide body with gull-wing leads. The exposed pad variant is not used in this MTR ordering code; thermal dissipation relies on PCB copper area under the package base.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-channel constant-current LED driver applications.

Compared with TLC59283DBQR and IS31FL3731-QFLS4, STP16CP05MTR offers superior timing predictability for high-refresh LED scanning, minimal external components for basic constant-current drive, and proven thermal robustness in SO-24 packages - making it optimal for cost-sensitive, high-reliability LED matrix applications.

Availability

STP16CP05MTR is available at Aetrix Electronics and suitable for LED video wall drivers, industrial HMI displays, POS terminal status panels, and automotive interior lighting requiring stable component supply and long-term production continuity.

Supply support for STP16CP05MTR 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, microcontrollers, sensors, and analog ICs for industrial, automotive, and consumer markets.

STP16CP05MTR belongs to ST's LED driver product line, engineered specifically for high-density, low-cost LED display systems requiring precise current regulation, high-speed serial control, and industrial-grade reliability.

FAQ

What is the minimum supply voltage required for reliable operation?

STP16CP05MTR operates reliably down to 3.0 V, as confirmed in Table 5 (Recommended Operating Conditions). At 3.0 V, propagation delays increase slightly (e.g., t_PLH1 up to 74 ns), but all timing parameters remain within specification. Below 3.0 V, output current regulation degrades and latch functionality may become unstable.

How does R-EXT affect output current accuracy and thermal performance?

R-EXT directly sets nominal output current (e.g., 4.2 kΩ → 5 mA; 200 Ω → 100 mA), with accuracy dependent on resistor tolerance and temperature coefficient. Lower R-EXT values increase total power dissipation: at 100 mA × 16 channels and 5 V supply, worst-case power exceeds 1.2 W - requiring adequate PCB copper area for SO-24 thermal management.

Can STP16CP05MTR drive LEDs in common-anode configuration?

No - STP16CP05MTR provides only sink (low-side) outputs (OUT0–OUT15). It must be used with common-anode LED arrays, where LED anodes connect to V_DD (or a higher rail) and cathodes connect to the driver outputs. It cannot drive common-cathode configurations without external high-side switches.

Is daisy-chaining supported, and what are the timing implications?

Yes - SDO (pin 22) outputs shifted data for connection to SDI of the next device. In cascade, cumulative clock skew and propagation delay (t_PLH ≈ 11–28 ns per stage) limit maximum achievable data rate; ST recommends derating f_CLK below 30 MHz for chains exceeding 3–4 devices to maintain setup/hold timing margins.