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

STMicroelectronics STP16C596TTR

Name: STP16C596TTR
Brand: STMicroelectronics
SKU: STP16C596TTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STP16C596TTR

Manufacturer:: STMicroelectronics

Category:: LED Drivers

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

Datasheet:: STP16C596TTR.pdf

Description:: IC LED DRVR LINEAR 120MA 24TSSOP

Quantity:: RFQ Add To RFQ list

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Inventory:4,869

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Product details

Overview

STP16C596TTR 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 15–120 mA per channel with ±3% current matching between outputs, supports 25 MHz clock input, and provides 16 V output voltage capability for driving multiple LEDs in series.

For engineers reviewing the STP16C596TTR datasheet, STP16C596TTR pinout, STP16C596TTR application, or STP16C596TTR equivalent, key selection criteria include adjustable current programming via R_EXT, daisy-chainable serial-in/serial-out interface with falling-edge clock synchronization, thermal performance of exposed-pad TSSOP, and latch-enable timing control for synchronized LED updates.

Technical Context

The device integrates a 16-bit shift register cascaded to a 16-bit D-type storage latch, enabling serial data loading followed by parallel output latching. Output enable (OE) is active-low and fully disables all 16 current sinks independently of latch state.

Current regulation is achieved through an external resistor (R_EXT) connected to pin 23, setting nominal output current across all channels with ±3% matching between bits at V_O ≥ 0.7 V. Serial output (SDO) transitions on the falling edge of CLK, reducing skew sensitivity in long daisy chains.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Channels	16 independent constant-current sinks, each programmable 15–120 mA
Current Accuracy	±3% matching between outputs, ±10% variation across ICs
Max Output Voltage	16 V - supports up to 5 white/blue LEDs in series at typical forward voltage
CLK Frequency	25 MHz - enables >400 kSPS serial data throughput for high-refresh displays
Supply Voltage	4.5–5.5 V - compatible with standard 5 V logic and display power rails
Thermal Resistance	R_thJA = 37.5 °C/W - enabled by soldered exposed pad, 2.5× better than standard TSSOP
Propagation Delay	t_PLH1 = 280 ns max (CLK→OUT), t_PHL3 = 60 ns max (OE→OUT) - ensures tight timing control in synchronized arrays

Pinout & Package

TSSOP-24 package with thermally enhanced exposed pad (electrically unconnected); 0.65 mm pitch, 7.7 × 4.4 mm body size; RoHS-compliant ECOPACK® with lead-free terminations.

Pin/Terminal	Circuit Role	Design Meaning
1 GND	Ground reference	Common return path for all 16 output currents and internal logic
2 SDI	Serial data input	CMOS-compatible input accepting 25 MHz data stream for shift register loading
3 CLK	Serial clock input	Falling-edge-triggered clock synchronizes data shift and SDO update
4 LE	Latch enable	High level transfers shift register contents to output latch; low level holds output state
5–20 OUT0–OUT15	Constant-current sink outputs	Each drives LED cathode to GND with regulated current set by R_EXT
21 OE	Output enable (active low)	Global shutdown: pulls all outputs high-impedance when high
22 SDO	Serial data output	Falling-edge-aligned output for daisy-chaining to next STP16C596
23 R-EXT	Current-setting resistor terminal	Connects external resistor to set nominal output current (e.g., 470 Ω → ~50 mA)
24 VDD	Positive supply	5 V supply powering logic and current regulation circuitry

Key Features

Feature	Design Value
Falling-edge SDO synchronization	Eliminates timing skew accumulation in multi-device daisy chains, enabling reliable >10-device cascades
Adjustable current via R_EXT	Single resistor sets uniform brightness across all 16 channels without per-channel trimming
16 V output compliance	Supports series strings of high-V_F LEDs (e.g., blue/white) without external boost circuitry
Exposed thermal pad	Reduces junction-to-ambient thermal resistance to 37.5 °C/W, enabling 120 mA/channel continuous operation
Active-low global OE	Enables flicker-free PWM dimming by rapidly gating all outputs without disturbing shift/latch states

Applications

LED Video Wall Panels

Industrial HMI Displays

Use Scenario: High-resolution indoor video walls using surface-mount RGB LED modules with 1/16 scan rate.

IC Role / Device Role / Timing Role: Sink driver for column (cathode) control in multiplexed LED matrix; receives serialized pixel data at 20+ MHz.

Use Value: ±3% current matching ensures uniform brightness across panels; 25 MHz clock supports real-time 60 Hz full-color refresh.

Use Scenario: Operator interface panels in factory automation systems requiring high-visibility status indicators and segmented displays.

IC Role / Device Role / Timing Role: Constant-current sink for discrete status LEDs and alphanumeric segments; driven by microcontroller SPI interface.

Use Value: 16 V output headroom allows direct drive of 4–5 LED stacks per channel; OE pin enables synchronized blink patterns across all indicators.

Point-of-Sale Digital Signage

Transportation Information Displays

Use Scenario: Compact retail signage with dynamic price and promotion text using monochrome LED dot-matrix modules.

IC Role / Device Role / Timing Role: Serial-to-parallel LED driver for character generation; updated via UART-to-SPI bridge.

Use Value: R_EXT-based current tuning maintains consistent luminance across varying ambient temperatures; TSSOP exposed pad sustains 85°C cabinet operation.

Use Scenario: Outdoor bus/train arrival boards with wide operating temperature range (-40°C to +85°C) and high-brightness requirements.

IC Role / Device Role / Timing Role: High-reliability LED sink driver for red/green/yellow segment arrays; controlled by industrial PLC with noise-immune timing.

Use Value: 125°C max operating temperature rating and ±10% inter-IC current tolerance ensure stable brightness over vehicle vibration and thermal cycling.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TB62706CFNG	16-channel sink driver; 50 mA max per channel; no exposed pad; 10 MHz max clock	Limited to lower-current, lower-speed signage; lacks thermal headroom for sustained 120 mA operation	Select when cost-sensitive designs require only 30–50 mA and operate below 60°C ambient
AL8863T-13	DC-DC LED controller (buck); requires external MOSFET and inductor; 1 A output	Designed for high-power single-string LED lighting, not multiplexed panel driving	Choose only for constant-voltage LED strips or architectural lighting-not for matrix/segment control

Compared with TB62706CFNG and AL8863T-13, STP16C596TTR uniquely combines high-current per channel (120 mA), high-speed serial interface (25 MHz), and thermally optimized packaging-making it the only option qualified for high-brightness, high-refresh-rate LED panel applications requiring precise per-pixel current control.

Availability

STP16C596TTR is available at Aetrix Electronics and suitable for LED video walls, industrial HMIs, point-of-sale signage, and transportation information displays requiring stable component supply and long-term manufacturing continuity.

Supply support for STP16C596TTR 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, delivering automotive, industrial, and power management solutions with emphasis on reliability and energy efficiency.

The STP16C596 belongs to ST's LED driver product line, engineered specifically for high-density, high-reliability LED panel applications where precise current matching, thermal robustness, and daisy-chain scalability are critical.

FAQ

What is the function of the R-EXT pin (pin 23)?

The R-EXT pin connects to an external resistor that sets the reference current for all 16 output channels. Using a 470 Ω resistor yields ~50 mA per channel at 5 V supply; values from 250 Ω to 910 Ω scale output current from ~100 mA down to ~20 mA. The resistor must be placed between R-EXT and GND.

Can STP16C596TTR drive LEDs directly from a 3.3 V microcontroller?

Yes - its inputs (SDI, CLK, LE, OE) accept 3.3 V logic levels when VDD = 5 V, as VIH(min) = 0.7 × VDD = 3.5 V and VIL(max) = 0.3 × VDD = 1.5 V. A 3.3 V MCU meets these thresholds with margin; no level-shifting is required for control signals.

How does the exposed thermal pad affect PCB layout?

The exposed pad (EP) is electrically isolated but must be soldered to a large copper pour tied to GND for optimal thermal performance. ST recommends ≥ 4 thermal vias (0.3 mm diameter) connecting EP to inner ground planes. Omitting this reduces R_thJA from 37.5 to 85 °C/W, risking thermal shutdown above 60 mA/channel.

Is STP16C596TTR compatible with STP16C596XTTR?

Yes - both share identical pinout, electrical specs, and functionality. STP16C596XTTR explicitly denotes the exposed-pad variant; STP16C596TTR (per ST's ordering table) is the same TSSOP24-exposed-pad tape-and-reel part. No design changes or layout modifications are needed when substituting.

STP16C596TTR 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):: 4.5V

Voltage - Supply (Max):: 5.5V

Voltage - Output:: 16V

Current - Output / Channel:: 120mA

Frequency:: 25MHz

Dimming:: -

Applications:: -

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-TSSOP

STP16C596TTR FAQ

1.How can I place an order for STP16C596TTR through Aetrix?

Please submit a Request for Quotation (RFQ) for STP16C596TTR 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 STP16C596TTR reliable?

The price and inventory of STP16C596TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP16C596TTR is usually 5 days.

3.What payment methods are accepted for STP16C596TTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP16C596TTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STP16C596TTR?

STP16C596TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STP16C596TTR 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 STP16C596TTR?

For technical support, including STP16C596TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP16C596TTR requirements.

6.How does Aetrix verify that STP16C596TTR is sourced from the original manufacturer or authorized distributors?

All STP16C596TTR 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 STP16C596TTR meets industry standards.

7.What is the process for return or replacement of STP16C596TTR?

All STP16C596TTR units undergo pre-shipment inspection (PSI). If there is an issue with STP16C596TTR, 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 STP16C596TTR part is unused and in its original packaging.

Return procedure for STP16C596TTR:

1.Submit a request within 90 days.

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

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