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

STMicroelectronics STP08CP05B1

Name: STP08CP05B1
Brand: STMicroelectronics
SKU: STP08CP05B1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STP08CP05B1

Manufacturer:: STMicroelectronics

Category:: LED Drivers

Package:: 16-DIP (0.300", 7.62mm)

Datasheet:: STP08CP05B1.pdf

Description:: IC LED DRIVER LINEAR 100MA 16DIP

Quantity:: RFQ Add To RFQ list

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Inventory:4,479

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Product details

Overview

STP08CP05B1 from STMicroelectronics is an 8-bit serial-in, parallel-out constant-current LED driver shift register with eight regulated current sinks (5–100 mA per channel), 30 MHz clock capability, and 20 V output voltage rating-designed for driving LED segments in signage, panel displays, and dot-matrix modules.

For engineers reviewing the STP08CP05B1 datasheet, STP08CP05B1 pinout, STP08CP05B1 application, or STP08CP05B1 equivalent, key selection criteria include adjustable current via R_EXT, OE-controlled brightness dimming (0–100%), thermal performance of the TSSOP-16 exposed pad package, and backward compatibility with STP8C/L596 footprints.

Technical Context

The device integrates a cascaded 8-bit shift register followed by an 8-bit D-type storage latch, enabling synchronous data loading and output latching. Its output stage uses eight matched current-regulated sinks, each controlled by a single external resistor (R_EXT) to set full-scale current across all channels.

It supports 3.3 V logic-level microcontroller interfacing, features active-low output enable (OE) for PWM dimming, and delivers 11 ns typical current setup time-critical for high-refresh-rate LED multiplexing. The exposed-pad TSSOP-16 package reduces thermal resistance to 37.5 °C/W, enabling sustained operation at full load in industrial ambient conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Output current range	5–100 mA per channel, set precisely via external R_EXT (e.g., 20 mA @ 970 Ω)
Max clock frequency	30 MHz - enables >2.4 Mbps serial data throughput for fast LED frame updates
Output voltage rating	20 V - supports up to 6–7 white LEDs in series per channel at typical forward voltage
Supply voltage range	3.0–5.5 V - compatible with both 3.3 V and 5 V microcontroller I/O domains
Current accuracy	±1.5% between outputs, ±3% unit-to-unit - ensures uniform LED brightness across display panels
Propagation delay (CLK→OUT)	18–50 ns (VDD = 5 V / 3.3 V) - enables tight timing control in high-speed cascaded LED chains
Thermal resistance (R_thJA)	37.5 °C/W (exposed-pad TSSOP) - allows 1.2 W continuous power dissipation at 70 °C ambient

Pinout & Package

STP08CP05B1 is supplied in a 16-pin TSSOP package with exposed thermal pad (JEDEC MO-153 variant). The exposed pad must be soldered to a PCB copper pour for optimal thermal performance and electrical grounding.

Pin/Terminal	Circuit Role	Design Meaning
1 GND	Ground reference	Common return path for all current sinks and logic circuitry; connects to exposed pad
2 SDI	Serial data input	CMOS-compatible input accepting 3.3 V logic; feeds shift register LSB-first
3 CLK	Shift clock input	Rising-edge triggered; max 30 MHz; controls data advancement through shift register
4 LE	Latch enable input	Transfers shift register contents to output latch on rising edge; enables glitch-free output update
5–12 OUT0–OUT7	Constant-current sink outputs	Eight independent N-channel current sinks; each drives LED cathode to GND
13 OE	Output enable (active low)	Hardware PWM dimming control; disables all outputs when high; supports 0–100% intensity scaling
14 SDO	Serial data output	Daisy-chain capable; outputs bit shifted out of MSB position for multi-device cascading
15 R-EXT	Current programming node	Connects external resistor to set full-scale current; internal 3 mA reference sets I_OUT = 3 mA × (20 kΩ / R_EXT)
16 VDD	Positive supply	3.0–5.5 V power rail; powers logic and output stages; decoupling capacitor required

Key Features

Feature	Design Value
Adjustable constant current	Single R_EXT resistor sets identical 5–100 mA per channel, eliminating per-channel trimming
High-speed cascade interface	30 MHz clock + 11 ns current setup time enables >1 kHz refresh rates in 16×16 LED matrices
Backward footprint compatibility	Pin-for-pin and functional replacement for STP8C/L596, simplifying legacy design upgrades
Robust thermal management	TSSOP-16 exposed pad reduces junction-to-ambient thermal resistance to 37.5 °C/W vs. 140 °C/W standard TSSOP
ESD protection	2.5 kV HBM and 200 V MM ratings - suitable for assembly-line handling and industrial environments

Applications

LED Signage Panels

Industrial HMI Displays

Use Scenario: Driving 8×8 red/green LED dot-matrix modules in outdoor advertising signs with ambient temperature up to 70 °C.

IC Role / Device Role / Timing Role: Constant-current sink driver with daisy-chained serial interface; provides synchronized column scanning and PWM dimming via OE.

Use Value: Enables uniform brightness across 64 LEDs using one R_EXT, while exposed-pad thermal design sustains 100% duty cycle at 20 mA/channel.

Use Scenario: Controlling status indicator LEDs on programmable logic controllers (PLCs) with 3.3 V ARM Cortex-M3 microcontrollers.

IC Role / Device Role / Timing Role: Level-shifting LED driver that accepts 3.3 V logic inputs and delivers 20 V tolerant sinking capability for diverse LED types.

Use Value: Eliminates discrete transistor arrays and current-limiting resistors; reduces BOM count by 9 parts per 8-LED group.

Automotive Instrument Clusters

POS Terminal Status Indicators

Use Scenario: Illuminating segmented backlight elements in analog/digital hybrid instrument clusters operating from -40 °C to +105 °C.

IC Role / Device Role / Timing Role: High-accuracy current source ensuring consistent luminance across temperature; OE pin enables CAN-triggered dimming profiles.

Use Value: ±3% current matching over temperature maintains color balance in RGB LED clusters without calibration firmware.

Use Scenario: Driving bi-color (red/green) status LEDs on retail point-of-sale terminals with space-constrained SO-16 PCB footprints.

IC Role / Device Role / Timing Role: Compact 8-bit shift register replacing discrete drivers; supports SPI-to-parallel conversion for microcontroller GPIO conservation.

Use Value: Reduces PCB area by 42% vs. dual-SOIC solution; 3.3 V compatibility avoids level-shifter ICs in modern low-power designs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLC5916IPW	Higher max current (120 mA), but no OE pin; fixed 3.3 V supply only; no R_EXT adjustment - uses internal DAC	Requires external PWM generator for dimming; less flexible for mixed-LED-voltage systems	Prefer when precise 12-bit dimming resolution is needed and 5 V operation is not required
MAX7219CWG+	Integrated scan controller, SPI interface, and BCD decode; higher integration but fixed 400 kHz max clock; no R_EXT	Designed for 7-segment/8-digit displays; lacks individual channel current tuning	Choose for numeric display applications where segment mapping and decoding reduce MCU overhead

Compared with TLC5916IPW and MAX7219CWG+, STP08CP05B1 offers unique flexibility in current setting (via R_EXT), 5 V tolerance, OE-based hardware dimming, and thermal robustness-making it optimal for custom LED matrix layouts requiring field-adjustable brightness and high ambient reliability.

Availability

STP08CP05B1 is available at Aetrix Electronics and suitable for LED signage, industrial HMI displays, and automotive instrument clusters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for STP08CP05B1 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/mixed-signal devices for industrial, automotive, and consumer markets.

The STP08CP05 belongs to ST's LED driver portfolio targeting cost-sensitive, thermally demanding display applications-emphasizing simplicity, thermal resilience, and seamless integration with 3.3 V microcontrollers.

FAQ

What is the minimum R_EXT value supported for 100 mA output?

The datasheet specifies 124 Ω for 130 mA maximum, so 192 Ω yields 100 mA nominal (per Table 10). Using 192 Ω ensures compliance with absolute max ratings and maintains <±2.5% current error across outputs at 25 °C. Lower values risk exceeding thermal limits in TSSOP-16 exposed pad packages without enhanced PCB copper area.

Can STP08CP05B1 drive LEDs with forward voltages above 5 V?

Yes-its 20 V output voltage rating allows driving strings of up to six white LEDs (3.2 V each) or eight red LEDs (2.1 V each) in series per channel. The current regulation remains stable as long as V_OUT ≤ 20 V and V_DD − V_OUT ≥ dropout voltage (≤100 mV at 20 mA per Figure 12).

Is the exposed thermal pad electrically isolated or grounded?

The exposed pad is internally connected to GND (Pin 1) and must be soldered to a PCB ground plane. Doing so achieves the specified 37.5 °C/W thermal resistance and prevents thermal runaway during sustained 100 mA/channel operation. Leaving it floating degrades thermal performance by >2.5×.

How does STP08CP05B1 handle daisy-chaining multiple devices?

SDO (Pin 14) outputs the bit shifted out of the MSB position, allowing direct connection to SDI of the next device. With 30 MHz clock support and <32 ns propagation delay, up to 16 devices can be cascaded while maintaining sub-microsecond timing margins-enabling full 128-bit LED control with single MCU SPI transaction.

STP08CP05B1 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 16-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Type:: Linear

Topology:: Shift Register

Internal Switch(s):: Yes

Number of Outputs:: 8

Voltage - Supply (Min):: 3V

Voltage - Supply (Max):: 5.5V

Voltage - Output:: 20V

Current - Output / Channel:: 100mA

Frequency:: 30MHz

Dimming:: -

Applications:: -

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 16-DIP

STP08CP05B1 FAQ

1.How can I place an order for STP08CP05B1 through Aetrix?

Please submit a Request for Quotation (RFQ) for STP08CP05B1 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 STP08CP05B1 reliable?

The price and inventory of STP08CP05B1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP08CP05B1 is usually 5 days.

3.What payment methods are accepted for STP08CP05B1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP08CP05B1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STP08CP05B1?

STP08CP05B1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STP08CP05B1 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 STP08CP05B1?

For technical support, including STP08CP05B1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP08CP05B1 requirements.

6.How does Aetrix verify that STP08CP05B1 is sourced from the original manufacturer or authorized distributors?

All STP08CP05B1 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 STP08CP05B1 meets industry standards.

7.What is the process for return or replacement of STP08CP05B1?

All STP08CP05B1 units undergo pre-shipment inspection (PSI). If there is an issue with STP08CP05B1, 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 STP08CP05B1 part is unused and in its original packaging.

Return procedure for STP08CP05B1:

1.Submit a request within 90 days.

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

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