STMicroelectronics STP08CL596TTR

Overview

STP08CL596TTR from STMicroelectronics is an 8-channel constant-current LED sink driver with serial-in/parallel-out shift register architecture, designed for LED panel displays. It delivers 15–90 mA per channel via external R_EXT, supports 25 MHz clocking, operates from 3.0–3.6 V supply, and provides 16 V output voltage capability for driving multiple LEDs in series.

For engineers reviewing the STP08CL596TTR datasheet, STP08CL596TTR pinout, STP08CL596TTR application, or STP08CL596TTR equivalent, key selection criteria include adjustable current accuracy (±3% between channels), thermal performance of the TSSOP-16 exposed-pad package, /OE-controlled output enable timing, and cascade-compatible serial data out (SDO) with clock-falling-edge propagation.

Technical Context

The device integrates an 8-bit shift register cascaded to an 8-bit D-type storage latch, enabling synchronous data loading and output latching. Output stage uses sixteen regulated current sources-eight active sink channels plus internal redundancy-to ensure matched current delivery across all outputs under varying V_O (up to 16 V) and temperature (−40°C to +125°C).

Serial interface features SDI input sampled on CLK rising edge and SDO output updated on CLK falling edge, supporting daisy-chained configurations. /LE controls parallel latch update timing, while active-low /OE enables/disables all outputs independently of latch state, allowing blanking without data corruption.

Key Specifications

Pinout & Package

TSSOP-16 with exposed thermal pad (package code: TSSOP16); 4.9 × 6.4 mm body, 0.65 mm pitch, 1.2 mm height; thermal pad improves heat dissipation by 2.5× vs standard TSSOP.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPIC6C595MTR, STP08CL596TTR adds adjustable current, /OE blanking, and 16 V drive for longer LED strings; versus TLC59283PWPR, it trades per-channel PWM for simpler SPI interface, lower latency, and reduced system-level complexity in fixed-brightness applications.

Availability

STP08CL596TTR is available at Aetrix Electronics and suitable for LED video walls, industrial HMIs, automotive dashboard clusters, and point-of-sale display modules requiring stable component supply across extended temperature ranges and high-volume production.

Supply support for STP08CL596TTR 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/mixed-signal ICs for industrial, automotive, and consumer markets.

The STP08CL596 belongs to ST's LED driver portfolio targeting medium-voltage, constant-current panel display applications - engineered for reliability in high-density LED arrays where thermal efficiency, current matching, and interface simplicity are critical.

FAQ

What is the minimum R_EXT value supported for 90 mA output?

The datasheet specifies 90 mA maximum output current at V_O ≥ 0.7 V and T = 25°C. Using Figure 13 (Output Current vs R_EXT), 90 mA corresponds to R_EXT ≈ 250 Ω. At this value, supply current IDD(ON2) reaches 10.1–14.1 mA, and thermal design must account for increased power dissipation in the TSSOP-16 EP package.

Can STP08CL596TTR drive white LEDs with forward voltage ~3.2 V each?

Yes - with 16 V output compliance, STP08CL596TTR can drive up to four 3.2 V white LEDs in series per channel (12.8 V total), leaving 3.2 V headroom for current regulation. At 25°C and R_EXT = 360 Ω, typical output is 50.2 mA, delivering ~1.6 W per channel with proper PCB thermal design.

How does the /LE pin interact with /OE during dynamic operation?

/LE transfers shift register data to the output latch; /OE independently enables or disables the output drivers. When /OE is high, all outputs are forced low regardless of latch state - enabling blanking without disrupting ongoing data shifts or latch updates. This decoupling supports glitch-free PWM dimming synchronized to frame rate.

Is the TSSOP-16 exposed pad internally connected to GND?

Yes - per STMicroelectronics mechanical drawing 0080338D and thermal data (Table 5), the exposed pad is electrically and thermally tied to Pin 1 (GND). It must be soldered to a dedicated PCB GND plane with ≥4 thermal vias (0.3 mm diameter) to achieve the rated R_thj-amb = 140 °C/W and sustain full 720 mA GND current.