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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

STMicroelectronics STP16CL596TTR

Name: STP16CL596TTR
Brand: STMicroelectronics
SKU: STP16CL596TTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STP16CL596TTR

Manufacturer:: STMicroelectronics

Category:: LED Drivers

Package:: 24-TSSOP (0.173", 4.40mm Width)

Datasheet:: STP16CL596TTR.pdf

Description:: IC LED DRVR LINEAR 90MA 24TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STP16CL596TTR from STMicroelectronics is a 16-bit constant-current LED sink driver in TSSOP-24 exposed-pad package, designed for serially controlled LED panel displays. It delivers 15–90 mA per channel with ±3% current matching between outputs, supports 25 MHz clock input, and operates from 3.0–3.6 V supply-enabling direct interfacing with 3.3 V microcontrollers in signage and industrial HMI applications.

For engineers reviewing the STP16CL596TTR datasheet, STP16CL596TTR pinout, STP16CL596TTR application, or STP16CL596TTR equivalent, key selection criteria include output current adjustability via R_EXT, daisy-chainable SDO timing on clock fall edge, 16 V output voltage capability for multi-LED series strings, and thermal performance enabled by the exposed pad.

Technical Context

The device integrates a 16-bit serial-in/parallel-out shift register cascaded with a 16-bit D-type storage latch, enabling synchronous data loading and output latching. Output enable (OE) is active-low and provides global shutdown, while latch enable (LE) controls transparent vs. hold behavior of the storage register.

Each of the 16 output channels contains a precision current sink regulated by an external R_EXT resistor, delivering matched current across all channels with ±3% typical inter-channel accuracy at V_O ≥ 0.7 V. The SDO pin propagates shifted data on the falling edge of CLK, reducing skew sensitivity in long daisy chains.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current Range	15–90 mA per channel, set by external R_EXT (e.g., 910 Ω → ~20.6 mA typ.)
Current Matching Accuracy	±3% between channels, ensuring uniform LED brightness across 16 outputs
Max Output Voltage	16 V, supporting up to 5 white LEDs (3.2 V each) in series per channel
Max Clock Frequency	25 MHz, enabling full 16-bit update in ≤640 ns for high-refresh-rate displays
Supply Voltage Range	3.0–3.6 V, compatible with standard 3.3 V logic systems without level shifting
Propagation Delay (CLK→OUT)	250–280 ns, enabling precise timing control in synchronized LED arrays
Thermal Resistance (R_thJA)	37.5 °C/W (TSSOP-24 exposed pad), 2.5× better than standard TSSOP for sustained 90 mA/channel operation

Pinout & Package

TSSOP-24 package with exposed thermal pad (electrically unconnected); requires PCB soldering of pad to ground plane for optimal thermal performance.

Pin/Terminal	Circuit Role	Design Meaning
1 GND	Ground reference	Common return for all internal circuits and output current sinks
2 SDI	Serial data input	CMOS-compatible input accepting 3.3 V logic; data shifted in MSB-first on rising CLK edge
3 CLK	Serial clock input	Rising edge shifts data into shift register; falling edge updates SDO output
4 LE	Latch enable	High enables transparent mode (data passes to outputs); low holds latched state
5–20 OUT0–OUT15	Constant-current sink outputs	Each drives LED cathodes; current magnitude set globally by R_EXT
21 OE	Output enable (active low)	Pulls all outputs OFF when high; enables PWM dimming when toggled
22 SDO	Serial data output	Shifted-out MSB of previous load; changes on CLK falling edge for skew-tolerant daisy chaining
23 R-EXT	Current-setting resistor terminal	Connects external resistor to GND to program output current (I_OUT ∝ 1/R_EXT)
24 VDD	Power supply	3.0–3.6 V supply for logic and output stage; decoupling capacitor required near pin

Key Features

Feature	Design Value
Falling-edge SDO timing	Enables reliable daisy chaining over >10 devices without clock skew compensation
Adjustable current via R_EXT	Single resistor sets all 16 channels simultaneously, simplifying brightness calibration
16 V output compliance	Supports longer LED strings per channel, reducing external component count in signage designs
Exposed thermal pad (TSSOP)	Reduces junction-to-ambient thermal resistance to 37.5 °C/W, enabling full 90 mA/channel at +85°C ambient
3.3 V logic compatibility	Direct interface with ARM Cortex-M, STM32, and other 3.3 V MCUs-no level translators needed

Applications

LED Video Signage

Industrial HMI Panels

Use Scenario: Outdoor full-color LED display modules requiring uniform brightness across thousands of pixels.

IC Role / Device Role / Timing Role: Constant-current sink driver for red/green/blue LED subpixels; receives serialized pixel data via SPI-like interface.

Use Value: ±3% current matching ensures color fidelity across panels; 16 V compliance allows 4–5 LEDs per string, minimizing wiring complexity.

Use Scenario: Factory-floor operator interfaces with status indicators, warning lights, and segmented displays.

IC Role / Device Role / Timing Role: LED driver for discrete status LEDs and 7-segment numeric displays controlled by PLC or microcontroller.

Use Value: Active-low OE enables hardware PWM dimming; 3.3 V compatibility eliminates level-shifting components in modern embedded controllers.

Architectural Lighting Controls

Test & Measurement Equipment

Use Scenario: Programmable RGBW lighting strips in commercial buildings with centralized DMX or DALI-to-SPI bridge control.

IC Role / Device Role / Timing Role: Current-regulated sink for individual LED channels in addressable linear arrays.

Use Value: R_EXT-based current tuning allows per-design calibration; exposed pad sustains 90 mA/channel during extended thermal stress testing.

Use Scenario: Front-panel LED indicators on oscilloscopes, power supplies, and signal generators requiring stable visual feedback.

IC Role / Device Role / Timing Role: Low-noise, jitter-immune LED driver synchronized to system clock for deterministic indicator timing.

Use Value: Falling-edge SDO minimizes inter-device timing skew in multi-board rack systems; 25 MHz clock supports rapid status updates during self-test sequences.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLC59283RTJR	16-bit sink driver with 3–20 mA range; no R_EXT adjustment-current set digitally via I²C	Requires I²C host and firmware overhead; lacks 16 V output headroom (max 17 V but derated at high current)	Prefer when digital current trimming and diagnostics are needed over analog simplicity
MAX7219CWG+	8-bit driver with integrated BCD decode, scan limit, and intensity control; uses SPI interface	Designed for 7-segment/matrix displays-not optimized for high-current, high-voltage LED strings	Prefer for multiplexed alphanumeric displays where built-in decoding reduces MCU load

Compared with TLC59283RTJR and MAX7219CWG+, the STP16CL596TTR offers superior analog current control granularity, higher output voltage margin, and lower propagation delay-making it optimal for high-fidelity, high-density LED signage where timing precision and thermal robustness are critical.

Availability

STP16CL596TTR is available at Aetrix Electronics and suitable for LED video signage, industrial HMI panels, architectural lighting controls, and test equipment requiring stable component supply and long-term production continuity.

Supply support for STP16CL596TTR 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 components for industrial, automotive, and consumer markets.

The STP16CL596 belongs to ST's LED driver product line, engineered specifically for high-reliability, medium-voltage LED panel applications where uniform current matching, thermal resilience, and daisy-chain scalability are essential.

FAQ

What is the function of the exposed thermal pad on the STP16CL596TTR package?

The exposed pad on the TSSOP-24 package is electrically isolated but thermally connected to the die substrate. When soldered to a large copper area on the PCB-ideally tied to GND-it reduces thermal resistance from junction to ambient to 37.5 °C/W, enabling sustained 90 mA per channel operation at +85°C ambient without derating. It must not be left floating or connected to any signal net.

How does the STP16CL596TTR achieve current matching across its 16 output channels?

Current matching is achieved through matched internal current mirror circuitry and laser-trimmed reference elements. At V_O ≥ 0.7 V, inter-channel accuracy is ±3% (typical) and ±5% (max), verified across temperature and supply voltage. This matching is independent of R_EXT value and remains stable over time-critical for consistent LED brightness in multi-channel arrays.

Can the STP16CL596TTR drive LEDs directly from a 5 V supply?

No-the STP16CL596TTR is specified for 3.0–3.6 V operation only. Supplying 5 V violates absolute maximum ratings (V_DD max = 7 V, but recommended operating V_DD is strictly 3.0–3.6 V). Exceeding 3.6 V risks logic-level incompatibility, increased leakage, and accelerated parametric drift. A dedicated 3.3 V LDO regulator is required for safe operation.

What is the purpose of the R-EXT pin, and how is output current calculated?

R-EXT connects an external resistor between pin 23 and GND to set output current: I_OUT ≈ 12.5 V / R_EXT. For example, a 470 Ω resistor yields ~26.6 mA per channel (typical). The relationship is linear and process-trimmed-datasheet Figure 13 confirms ±5% tolerance across R_EXT values from 250 Ω to 2 kΩ, with guaranteed 15–90 mA range.

STP16CL596TTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 24-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Linear

Topology:: Shift Register

Internal Switch(s):: Yes

Number of Outputs:: 16

Voltage - Supply (Min):: 3V

Voltage - Supply (Max):: 3.6V

Voltage - Output:: 16V

Current - Output / Channel:: 90mA

Frequency:: 25MHz

Dimming:: -

Applications:: -

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-TSSOP

STP16CL596TTR FAQ

1.How can I place an order for STP16CL596TTR through Aetrix?

Please submit a Request for Quotation (RFQ) for STP16CL596TTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STP16CL596TTR reliable?

The price and inventory of STP16CL596TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP16CL596TTR is usually 5 days.

3.What payment methods are accepted for STP16CL596TTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP16CL596TTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STP16CL596TTR?

STP16CL596TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STP16CL596TTR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STP16CL596TTR?

For technical support, including STP16CL596TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP16CL596TTR requirements.

6.How does Aetrix verify that STP16CL596TTR is sourced from the original manufacturer or authorized distributors?

All STP16CL596TTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STP16CL596TTR meets industry standards.

7.What is the process for return or replacement of STP16CL596TTR?

All STP16CL596TTR units undergo pre-shipment inspection (PSI). If there is an issue with STP16CL596TTR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STP16CL596TTR part is unused and in its original packaging.

Return procedure for STP16CL596TTR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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