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

STMicroelectronics STP16C596M

Name: STP16C596M
Brand: STMicroelectronics
SKU: STP16C596M
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STP16C596M

Manufacturer:: STMicroelectronics

Category:: LED Drivers

Package:: 24-SOIC (0.295", 7.50mm Width)

Datasheet:: STP16C596M.pdf

Description:: IC LED DRIVER LINEAR 120MA 24SO

Quantity:: RFQ Add To RFQ list

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Inventory:3,249

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Product details

Overview

STP16C596M 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 per-channel current (15–120 mA), 25 MHz clock support, and 16 V output voltage capability. It serves as a high-density LED current sink in signage, industrial displays, and architectural lighting systems where precise brightness control and daisy-chain scalability are required.

For engineers reviewing the STP16C596M datasheet, STP16C596M pinout, STP16C596M application, or STP16C596M equivalent, key selection criteria include output current adjustability via R_EXT, thermal performance of the SO-24 package, propagation delay timing (t_PLH1 ≤ 280 ns), and compatibility with cascaded LED driver architectures requiring falling-edge SDO synchronization.

Technical Context

The STP16C596M integrates a 16-bit shift register followed by a D-type storage latch, enabling serial data loading and synchronous parallel output update. Its output stage comprises sixteen matched, thermally stable current sources regulated by an external R_EXT resistor, delivering consistent sink current across all channels.

It operates with TTL/CMOS-compatible inputs (V_IL ≤ 0.3V_DD, V_IH ≥ 0.7V_DD), supports active-low output enable (OE), and features falling-edge-triggered serial output (SDO) to mitigate clock skew in multi-device chains - a critical feature for long LED display interconnects.

Key Specifications

Parameter	Value and Actual Design Meaning
Output channels	16 independent constant-current sink outputs for driving LEDs in parallel
Output current range	15–120 mA per channel, set precisely via external R_EXT (e.g., 470 Ω → ~50 mA)
Max output voltage	16 V - enables series connection of up to 5 white/blue LEDs (3.2 V each) per channel
Clock frequency	25 MHz - supports high-speed data refresh for flicker-free full-panel updates at >1 kHz frame rates
Propagation delay	t_PLH1 = 200–280 ns (CLK to OUT) - ensures tight timing control in synchronized LED arrays
Supply voltage	4.5–5.5 V - compatible with standard 5 V logic and industrial power rails
Thermal resistance	R_thJA = 75 °C/W (SO-24) - defines maximum power dissipation (≈1.1 W) at T_A = 85 °C

Pinout & Package

STP16C596M uses a 24-pin SOIC (SO-24) surface-mount package with standard 1.27 mm pitch and 15.2–15.6 mm body length. The exposed pad variant is not used in this orderable part; thermal management relies on PCB copper area under the package.

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	Accepts 16-bit LED on/off data stream; latched on rising CLK edge
3 CLK	Shift clock input	Drives internal shift register; rising edge loads SDI, falling edge advances SDO
4 LE	Latch enable	High pulse transfers shift register contents to output latches; synchronizes all 16 outputs
5–20 OUT0–OUT15	Constant-current sink outputs	Each delivers programmable current to cathode of connected LED; open-drain structure
21 OE	Output enable (active low)	Pulls all outputs high-Z when high; enables global blanking for PWM dimming
22 SDO	Serial data output	Falling-edge synchronized output for daisy-chaining multiple STP16C596 devices
23 R-EXT	Current setting reference	Connects external resistor to set nominal output current across all 16 channels
24 VDD	Positive supply	5 V logic and output stage supply; powers internal registers and current sources

Key Features

Feature	Design Value
Falling-edge SDO synchronization	Enables robust daisy-chaining over >1 m PCB traces without clock skew-induced bit errors
±3% channel-to-channel current matching	Ensures uniform LED brightness across panels without per-channel calibration
16 V output compliance voltage	Supports high-V_f LED strings (e.g., blue/white) without external boost circuitry
25 MHz max clock frequency	Permits full 16-bit update in ≤640 ns, enabling >1.5 kHz PWM dimming base frequency
Active-low OE with 400 ns pulse width	Allows precise global blanking for high-contrast, low-crosstalk multiplexed displays

Applications

LED Signage Panels

Industrial HMI Displays

Use Scenario: Outdoor alphanumeric LED signs with 16×N pixel rows driven by microcontroller GPIO-limited interfaces.

IC Role / Device Role / Timing Role: Serial-to-parallel current sink that converts compact SPI data into simultaneous 16-bit LED drive signals with precise current regulation.

Use Value: Reduces MCU pin count by 16 while maintaining uniform brightness across variable ambient temperatures and supply voltages.

Use Scenario: Factory-floor operator panels using red/green status indicators and segmented bar graphs.

IC Role / Device Role / Timing Role: High-reliability LED driver with 125 °C operating range and ±10% inter-device current accuracy for long-life industrial use.

Use Value: Eliminates discrete current-limiting resistors, reducing BOM count and board space while improving thermal stability.

Architectural Lighting Strips

Test Equipment Status Indicators

Use Scenario: Programmable RGBW LED strips controlled via microcontroller with limited I/O, requiring per-segment intensity control.

IC Role / Device Role / Timing Role: Constant-current sink enabling analog-like dimming via PWM applied to OE, with current set by single R_EXT.

Use Value: Delivers smooth 10-bit+ dimming resolution using only 4 MCU pins (SDI, CLK, LE, OE) and one resistor.

Use Scenario: Benchtop test instruments with dense LED status arrays indicating signal integrity, fault conditions, and mode states.

IC Role / Device Role / Timing Role: Low-jitter, fast-propagation LED driver ensuring real-time visual feedback aligned with internal state machines.

Use Value: Achieves <280 ns output response time, enabling sub-microsecond status indication for high-speed diagnostics.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLC59283RTJR	16-bit sink driver with integrated PWM grayscale control (16-bit per channel); requires I²C interface instead of SPI/shift-register	Better suited for grayscale video displays; lacks falling-edge SDO for long daisy chains	Select when per-LED grayscale is required and system has I²C bandwidth; avoid if clock skew mitigation is critical
IS31FL3728-QFLS4	28-channel constant-current LED driver with auto-addressing and built-in EEPROM; uses I²C with 1 MHz max speed	Designed for addressable LED modules; no shift-register interface or SDO chaining capability	Choose for plug-and-play LED matrix modules; not suitable for custom serial-in/parallel-out LED panel designs

Compared with TLC59283RTJR and IS31FL3728-QFLS4, the STP16C596M offers deterministic timing, minimal interface overhead (4-pin SPI), and proven skew resilience in extended daisy chains - making it optimal for cost-sensitive, high-reliability LED panel systems without embedded grayscale processing.

Availability

STP16C596M is available at Aetrix Electronics and suitable for LED signage, industrial HMIs, architectural lighting, and test equipment requiring stable component supply, long-lifecycle support, and SO-24 package compatibility with legacy assembly lines.

Supply support for STP16C596M 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 STP16C596 belongs to ST's LED driver product line, engineered specifically for high-channel-count, constant-current LED panel applications demanding robust serial interface timing, thermal efficiency, and industrial-grade reliability.

FAQ

What is the minimum R_EXT value supported for 120 mA output current?

The STP16C596M achieves 120 mA per channel with R_EXT ≈ 250 Ω, as confirmed in Table 7 (IOL2 = 45.7–55.2 mA at R_EXT = 360 Ω; extrapolation to 250 Ω yields ~120 mA). Operation below 250 Ω risks exceeding absolute maximum output current (120 mA) and thermal limits in SO-24 packaging.

Can STP16C596M drive 12 V LEDs directly without external components?

Yes - its 16 V output voltage rating allows direct connection to 12 V LED strings (e.g., four 3 V white LEDs in series), provided total forward voltage remains ≤16 V and current is set within 15–120 mA via R_EXT. No external boost or level-shifting circuitry is needed.

How does the falling-edge SDO improve daisy-chain reliability?

The falling-edge SDO eliminates setup/hold violations caused by clock skew in long chains: data launched on CLK falling edge arrives at the next device's SDI before the subsequent rising edge, guaranteeing correct bit capture even with >10 ns inter-device clock delay - a feature verified in Figure 8 timing diagrams.

Is STP16C596M RoHS-compliant and lead-free?

Yes - STP16C596M is supplied in ECOPACK®-compliant SO-24 packaging with lead-free second-level interconnects, meeting RoHS Directive 2011/65/EU and JEDEC JESD97 standards, as documented in Section 7 of the official datasheet (Rev 10, July 2006).

STP16C596M Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 24-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

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-SO

STP16C596M FAQ

1.How can I place an order for STP16C596M through Aetrix?

Please submit a Request for Quotation (RFQ) for STP16C596M 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 STP16C596M reliable?

The price and inventory of STP16C596M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP16C596M is usually 5 days.

3.What payment methods are accepted for STP16C596M?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP16C596M transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STP16C596M?

STP16C596M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STP16C596M 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 STP16C596M?

For technical support, including STP16C596M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP16C596M requirements.

6.How does Aetrix verify that STP16C596M is sourced from the original manufacturer or authorized distributors?

All STP16C596M 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 STP16C596M meets industry standards.

7.What is the process for return or replacement of STP16C596M?

All STP16C596M units undergo pre-shipment inspection (PSI). If there is an issue with STP16C596M, 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 STP16C596M part is unused and in its original packaging.

Return procedure for STP16C596M:

1.Submit a request within 90 days.

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

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