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

STMicroelectronics STP08C596M

Name: STP08C596M
Brand: STMicroelectronics
SKU: STP08C596M
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STP08C596M

Manufacturer:: STMicroelectronics

Category:: LED Drivers

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: STP08C596M.pdf

Description:: IC LED DRIVER LINEAR 120MA 16SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STP08C596M from STMicroelectronics is an 8-channel constant-current LED sink driver in SO-16 package, designed for serial-to-parallel LED panel driving with adjustable output current (15–120 mA per channel), 25 MHz clock support, and 16 V output voltage capability. It integrates an 8-bit shift register and D-type latch, enabling precise timing control in high-density LED signage and display systems.

For engineers reviewing the STP08C596M datasheet, STP08C596M pinout, STP08C596M application, or STP08C596M equivalent, key selection criteria include per-channel current adjustability via R_EXT, ±3% channel-to-channel current matching, /OE-controlled blanking, and thermal performance in SO-16 with exposed-pad variants.

Technical Context

The STP08C596M implements a cascaded 8-bit serial-in/parallel-out shift register feeding an 8-bit D-type storage latch, with independent /LE and /OE control for synchronous data latching and output enable. Its output stage uses sixteen regulated current sources-eight active sink channels plus internal redundancy-to deliver stable current across varying forward voltages up to 16 V.

Current regulation is set externally via R_EXT (e.g., 360 Ω → ~51 mA, 910 Ω → ~20.7 mA), with ±3% matching between channels and ±10% variation across ICs at V_O ≥ 0.7 V. Propagation delays are tightly specified: t_PLH1 = 200–280 ns (CLK→OUT), t_PHL3 = 45–60 ns (/OE→OUT), supporting high-speed LED refresh in multiplexed displays.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Channels	8 constant-current sink outputs, each independently controllable via parallel latch
Output Current Range	15–120 mA per channel, set by external R_EXT resistor (e.g., 360–910 Ω)
Channel Matching	±3% typical current accuracy between outputs under same V_O and R_EXT
Clock Frequency	Up to 25 MHz - supports >3.2 Mbps serial data throughput for fast LED frame updates
Output Voltage Capability	Up to 16 V - enables driving 4–5 white LEDs in series per channel at typical V_F
Supply Voltage	4.5–5.5 V - compatible with standard 5 V logic and industrial power rails
Operating Temperature	−40°C to +125°C - qualified for outdoor signage and automotive ambient lighting

Pinout & Package

STP08C596M is housed in a 16-pin SOIC (SO-16) package with standard 1.27 mm pitch, gull-wing leads, and no exposed thermal pad (unlike TSSOP16 variant). The package meets JEDEC MS-012AC and provides moderate thermal resistance (R_thj-amb = 125 °C/W).

Pin/Terminal	Circuit Role	Design Meaning
1 GND	Ground reference	Common return for all current sinks and logic inputs; must be low-impedance path to minimize ground bounce
2 SDI	Serial data input	CMOS-compatible input accepting 25 MHz data stream; LSB-first shift register loading
3 CLK	Clock input	Rising-edge triggered; controls bit-shift timing; SDO changes on falling edge per datasheet
4 /LE	Latch enable (active high)	Transfers shift register contents to output latch on rising edge; enables synchronized LED update
5–12 OUT0–OUT7	Constant-current sink outputs	Each delivers regulated current to LED cathodes; open-drain structure with 16 V breakdown rating
13 /OE	Output enable (active low)	Global blanking control; disables all outputs without affecting latch or shift register state
14 SDO	Serial data output	Daisy-chain capable; outputs shifted-out bit on CLK falling edge for multi-device cascading
15 R-EXT	Current programming node	Connects external resistor to set full-scale output current; internal reference generates I_OUT ∝ 1/R_EXT
16 VDD	Positive supply	5 V nominal supply; powers logic and bias circuits; decoupling capacitor required near pin

Key Features

Feature	Design Value
Adjustable per-channel current	Set precisely from 15–120 mA using single external resistor - eliminates per-channel trimming
High-speed serial interface	25 MHz clock tolerance enables <1 µs bit period - critical for flicker-free high-refresh-rate displays
Thermal robustness	Rated for −40°C to +125°C operation with SO-16 R_thj-amb = 125 °C/W - suitable for uncooled outdoor enclosures
Output voltage headroom	16 V output capability allows series connection of multiple LEDs without external boost circuitry
Channel-to-channel matching	±3% typical current uniformity ensures consistent LED brightness across display segments

Applications

Outdoor LED Signage

Industrial Panel Displays

Use Scenario: Large-format monochrome or RGB LED message boards exposed to sunlight and temperature extremes.

IC Role / Device Role / Timing Role: Constant-current sink driver controlling individual LED rows/columns in multiplexed matrix; synchronized via /LE and /OE for global blanking.

Use Value: 16 V output headroom supports 4–5 white LEDs in series per channel, reducing wiring complexity and improving power efficiency over resistive solutions.

Use Scenario: Operator interface panels in factory HMIs requiring high-brightness, long-life status indicators.

IC Role / Device Role / Timing Role: Serially driven LED driver replacing discrete transistor arrays; integrated latch enables static display retention without continuous clocking.

Use Value: ±3% channel matching ensures uniform LED intensity across status lights, eliminating visual inconsistency during inspection or maintenance.

Architectural Lighting Controls

Automotive Interior Lighting

Use Scenario: Programmable accent lighting in commercial buildings using addressable LED strips with centralized microcontroller control.

IC Role / Device Role / Timing Role: Cascadable sink driver receiving SPI-like serial data from MCU; SDO enables daisy-chaining multiple STP08C596M units.

Use Value: 25 MHz clock support allows rapid reconfiguration of lighting zones - essential for dynamic color-scene transitions without visible latency.

Use Scenario: Ambient cabin lighting modules in vehicles where EMI, thermal stress, and long-term reliability are critical.

IC Role / Device Role / Timing Role: LED current controller interfaced to automotive-grade MCU via isolated SPI; /OE used for PWM dimming synchronization.

Use Value: −40°C to +125°C operating range and 125 °C/W SO-16 thermal resistance ensure stable output current despite under-dash temperature cycling.

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
TLC5916IDR	8-bit sink driver with 3–120 mA range; uses internal reference (no R_EXT); lower max V_O = 17 V; I²C interface option	Requires I²C host instead of pure SPI; lacks SDO daisy-chain; better for space-constrained PCBs with mixed analog/digital supplies	Select when system already uses I²C infrastructure and fine-grained per-channel current programming is unnecessary
STPIC6C595MTR	Legacy 8-bit shift register with open-drain outputs (no current regulation); requires external current-limiting resistors; 15 V max V_O; same SO-16 footprint	Higher BOM cost and board area due to per-LED resistors; brightness varies with V_F drift and supply ripple	Select only for legacy redesigns where existing layout reuse is mandatory and thermal/current stability are secondary

Compared with TLC5916IDR, STP08C596M offers superior thermal stability and simpler analog current setting; versus STPIC6C595MTR, it eliminates external resistors and improves brightness uniformity - making it optimal for new LED panel designs demanding precision and scalability.

Availability

STP08C596M is available at Aetrix Electronics and suitable for outdoor LED signage, industrial HMI panels, and automotive interior lighting requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for STP08C596M 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 management ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STP08C596 belongs to ST's LED driver product line, engineered specifically for high-reliability, medium-voltage LED panel systems where precise current regulation, thermal resilience, and serial scalability are primary design requirements.

FAQ

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

The datasheet specifies 120 mA maximum output current at V_O ≥ 0.7 V with R_EXT ≈ 250 Ω. Using 250 Ω yields typical I_OUT = 10.1–14.1 mA per channel in OFF-state supply current tests, but actual output current scales inversely with R_EXT. For 120 mA, R_EXT must be ≤ 250 Ω - verified in Table 7 under IOL1/IOL2 conditions with REXT = 250 Ω yielding ~10.1–14.1 mA total supply current, confirming full-scale operation.

Can STP08C596M drive RGB LEDs with independent color control?

Yes - each of the 8 outputs can drive one LED segment (e.g., red, green, or blue sub-pixel in a tri-color module) with independent on/off control via the parallel latch. While it does not provide per-channel PWM dimming internally, external MCU-generated PWM on /OE or serial data enables full RGB intensity control across multiple STP08C596M devices in cascade.

How does /LE differ from /OE in functional timing?

/LE (latch enable) transfers data from the shift register to the output latch on its rising edge, freezing the output state until next latch event. /OE (output enable) is asynchronous and active-low: asserting /OE immediately disables all outputs regardless of latch state, enabling global blanking or PWM dimming without disturbing stored data - critical for flicker-free display updates.

Is thermal derating required when operating at 125°C ambient?

Yes - at T_A = 125°C, junction temperature rises rapidly due to R_thj-amb = 125 °C/W. With 8 channels at 120 mA and 2 V drop, P_D ≈ 1.92 W; T_J = 125 + (1.92 × 125) = 365°C - exceeding absolute max. Therefore, output current must be reduced per Figure 14 (Power Dissipation vs Temperature), typically limiting I_OUT to ≤ 40 mA per channel at full ambient rating.

STP08C596M Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Type:: Linear

Topology:: Shift Register

Internal Switch(s):: Yes

Number of Outputs:: 8

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:: 16-SO

STP08C596M FAQ

1.How can I place an order for STP08C596M through Aetrix?

Please submit a Request for Quotation (RFQ) for STP08C596M 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 STP08C596M reliable?

The price and inventory of STP08C596M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP08C596M is usually 5 days.

3.What payment methods are accepted for STP08C596M?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP08C596M transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STP08C596M?

STP08C596M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STP08C596M 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 STP08C596M?

For technical support, including STP08C596M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP08C596M requirements.

6.How does Aetrix verify that STP08C596M is sourced from the original manufacturer or authorized distributors?

All STP08C596M 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 STP08C596M meets industry standards.

7.What is the process for return or replacement of STP08C596M?

All STP08C596M units undergo pre-shipment inspection (PSI). If there is an issue with STP08C596M, 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 STP08C596M part is unused and in its original packaging.

Return procedure for STP08C596M:

1.Submit a request within 90 days.

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

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