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

STMicroelectronics STP16C596B1R

Name: STP16C596B1R
Brand: STMicroelectronics
SKU: STP16C596B1R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STP16C596B1R

Manufacturer:: STMicroelectronics

Category:: LED Drivers

Package:: 24-DIP (0.300", 7.62mm)

Datasheet:: STP16C596B1R.pdf

Description:: IC LED DRIVER LINEAR 120MA 24DIP

Quantity:: RFQ Add To RFQ list

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Inventory:2,686

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Product details

Overview

STP16C596B1R from STMicroelectronics is a 16-bit constant-current LED sink driver in DIP-24 package, designed for serially controlled LED panel displays. It delivers adjustable output current (15–120 mA per channel) via external R_EXT, supports 25 MHz clock frequency, and guarantees 16 V output voltage capability for driving multiple LEDs in series.

For engineers reviewing the STP16C596B1R datasheet, STP16C596B1R pinout, STP16C596B1R application, or STP16C596B1R equivalent, this page provides verified pin functions, thermal performance data for DIP-24, real-world timing behavior under cascade conditions, and validated alternatives for LED display system design.

Technical Context

The device integrates a 16-bit serial-in/parallel-out shift register cascaded with a 16-bit D-type storage latch, enabling precise synchronization of LED on/off states. Output enable (OE) is active-low and latching is controlled by LE, allowing independent data loading and output update cycles.

Each of the 16 output channels uses a regulated current source with ±3% inter-channel accuracy (typ.) and ±10% unit-to-unit variation at 15–120 mA. Serial data propagation (CLK→SDO) exhibits 15–30 ns typical delay, and outputs switch with 15–25 ns fall time and 160–200 ns rise time under 40 mA load.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Channels	16 independent constant-current sinks for LED anode-common configurations
Output Current Range	15–120 mA per channel, set by single external R_EXT resistor
Max Output Voltage	16 V - supports up to 5 white/blue LEDs in series at typical forward voltage
Clock Frequency	25 MHz - enables full 16-bit refresh in ≤640 ns, suitable for high-refresh-rate displays
Supply Voltage	4.5–5.5 V - compatible with standard 5 V logic and industrial power rails
Thermal Resistance	60 °C/W (DIP-24) - limits junction temperature rise to ≤60°C at 192 mA total output current
Propagation Delay	15–30 ns (CLK→SDO), 145–200 ns (OE→OUT) - ensures deterministic timing in daisy-chained systems

Pinout & Package

STP16C596B1R is housed in a 24-pin plastic dual in-line package (DIP-24) with 2.54 mm pitch and through-hole mounting. The exposed pad variant is not used in this orderable part; thermal dissipation relies on PCB copper area and ambient convection.

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 data stream synchronized to CLK falling edge
3 CLK	Clock input	Falling-edge triggered - enables robust daisy-chain operation under clock skew
4 LE	Latch enable	High level transfers shift register contents to output latches; low holds output state
5–20 OUT0–OUT15	Constant-current sink outputs	Each drives one LED cathode; current set globally by R_EXT
21 OE	Output enable (active low)	Global blanking control - disables all outputs without affecting latch state
22 SDO	Serial data output	Shifts out bit 15 after 16 clocks; enables multi-device daisy chaining
23 R-EXT	Current programming node	Connects external resistor to set full-scale output current (e.g., 470 Ω → ~50 mA)
24 VDD	Positive supply	Powers logic core and current sources; decoupling capacitor required near pin

Key Features

Feature	Design Value
Falling-edge clock sampling	Enables reliable daisy-chain operation over long PCB traces where clock skew exceeds setup/hold margins
Inter-channel current matching	±3% typical mismatch ensures uniform LED brightness across 16 segments without per-channel calibration
16 V output compliance	Supports series strings of high-V_f LEDs (e.g., blue/white) without external boost circuitry
Low quiescent current	0.3–0.6 mA supply current when all outputs disabled - reduces standby power in always-on displays
Thermal-enhanced DIP package	60 °C/W R_thJA allows continuous 120 mA/channel operation at +85°C ambient with minimal heatsinking

Applications

LED Message Signs

Industrial Panel Indicators

Use Scenario: Outdoor alphanumeric message signs using multiplexed red/green LED matrices.

IC Role / Device Role / Timing Role: Constant-current sink driver managing 16-column segments per scan line; serial interface reduces microcontroller GPIO count.

Use Value: 16 V output headroom enables direct drive of 4–5 red LEDs in series per column, eliminating per-string resistors and improving power efficiency.

Use Scenario: Factory HMI panels with status-indicator LEDs for machine states (RUN/ALARM/STOP).

IC Role / Device Role / Timing Role: LED current controller with global blanking (OE) for synchronized visual alerts during fault events.

Use Value: Active-low OE allows instantaneous LED shutdown across all 16 indicators without disturbing shift register or latch state - critical for safety-critical feedback.

Dot-Matrix Display Modules

Architectural Lighting Controllers

Use Scenario: 32×16 dot-matrix modules built from cascaded STP16C596B1R devices.

IC Role / Device Role / Timing Role: Serial-in/parallel-out shift register with daisy-chain SDO output; falling-edge clock tolerance prevents data corruption in long chains.

Use Value: 25 MHz clock support enables full-frame refresh at >120 Hz for flicker-free operation, even with 8+ devices in cascade.

Use Scenario: Low-voltage architectural lighting strips with mixed-color LED zones controlled by microcontroller.

IC Role / Device Role / Timing Role: Precision current sink enabling consistent luminance across RGB subpixels driven from common-anode arrays.

Use Value: ±3% inter-channel current matching eliminates visible color banding in white-point mixing applications without software compensation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLC5916IDR	16-bit sink driver with PWM dimming (128-step), 15–100 mA range, SOIC-24 package	Requires PWM signal for brightness control; no analog current adjustment via R_EXT	Choose when digital dimming precision outweighs need for analog current tuning
MAX7219CWG+	Integrated 8×8 matrix driver with SPI interface, on-chip decoding, and 10–40 mA per segment	Fixed 8×8 architecture; no direct 16-channel parallel output; higher integration but less flexible routing	Choose for compact 64-LED grids where microcontroller SPI bandwidth is constrained

Compared with TLC5916IDR and MAX7219CWG+, STP16C596B1R offers wider analog current range (15–120 mA), simpler R_EXT-based calibration, and DIP-24 through-hole compatibility for prototyping and legacy board assembly - making it optimal for cost-sensitive, high-brightness LED signage.

Availability

STP16C596B1R is available at Aetrix Electronics and suitable for LED message signs, industrial panel indicators, dot-matrix display modules, and architectural lighting controllers requiring stable component supply and long-term obsolescence management.

Supply support for STP16C596B1R 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, automotive ICs, and industrial interface solutions.

The STP16C596 belongs to ST's LED driver product line, engineered specifically for high-reliability, medium-voltage LED panel displays where precise current matching and daisy-chain robustness are essential.

FAQ

What is the maximum number of STP16C596B1R devices that can be daisy-chained reliably?

Up to 8 devices can be daisy-chained while maintaining timing integrity at 25 MHz, based on documented SDO propagation delay (15–30 ns) and minimum CLK pulse width (20 ns). Beyond 8 units, clock skew accumulation requires reducing clock frequency or adding repeater buffers to meet setup/hold requirements at the final device's SDI pin.

Does STP16C596B1R support PWM dimming?

No - STP16C596B1R does not include integrated PWM circuitry. Brightness control is achieved solely by adjusting the analog output current via the external R_EXT resistor. For PWM dimming, external microcontroller GPIOs must toggle the OE pin at desired duty cycle, leveraging its fast 45–60 ns turn-off delay.

Can STP16C596B1R drive 12 V LEDs directly?

Yes - with its 16 V output voltage rating, STP16C596B1R can directly drive strings of LEDs whose combined forward voltage is ≤16 V. For example, four 3 V blue LEDs (12 V total) operate safely within specification, provided the current is set below 120 mA per channel and thermal limits are observed.

Is the exposed pad on STP16C596B1R electrically connected?

No - the STP16C596B1R variant uses the standard DIP-24 package without an exposed pad. The exposed-pad version (STP16C596XTTR) has an isolated thermal pad intended for soldering to PCB ground plane for enhanced heat dissipation, but it is not electrically connected to any internal node.

STP16C596B1R Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 24-DIP (0.300", 7.62mm)

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:: Through Hole

Supplier Device Package:: 24-DIP

STP16C596B1R FAQ

1.How can I place an order for STP16C596B1R through Aetrix?

Please submit a Request for Quotation (RFQ) for STP16C596B1R 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 STP16C596B1R reliable?

The price and inventory of STP16C596B1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP16C596B1R is usually 5 days.

3.What payment methods are accepted for STP16C596B1R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP16C596B1R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STP16C596B1R?

STP16C596B1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STP16C596B1R 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 STP16C596B1R?

For technical support, including STP16C596B1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP16C596B1R requirements.

6.How does Aetrix verify that STP16C596B1R is sourced from the original manufacturer or authorized distributors?

All STP16C596B1R 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 STP16C596B1R meets industry standards.

7.What is the process for return or replacement of STP16C596B1R?

All STP16C596B1R units undergo pre-shipment inspection (PSI). If there is an issue with STP16C596B1R, 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 STP16C596B1R part is unused and in its original packaging.

Return procedure for STP16C596B1R:

1.Submit a request within 90 days.

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

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