STMicroelectronics

L9390 - 12-Channel Valve Driver | STMicroelectronics | Automotive

Name: L9390
Brand: STMicroelectronics
Price: 12.50 USD
Availability: InStock

MPN: L9390 ✓ Active

In Stock (99,999) Ships in 1-3 business days

[DATA_NEEDED: Operating voltage range] Vdss [DATA_NEEDED: Output current per channel] Id [DATA_NEEDED: On-resistance] Rds(on) 100-eTQFP (14x14 mm) Package

$12.5 USD / Unit

MOQ: 1 |

Volume Pricing

Qty	Unit Price	Extended
1	$12.5	$12.50
10	$11.25	$112.50
100	$10	$1,000.00
500	$9	$4,500.00
1,000	$8.1	$8,100.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for L9390 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

L9301

⚡ Same Package

📦 100-eTQFP (14x14 mm)

8-channel valve driver, same package but different channel count and pinout

📋 Reference alternative (not in catalog)

L9352

⚡ Same Package

📦 100-eTQFP (14x14 mm)

4-channel valve driver, same package but different channel count and pinout

📋 Reference alternative (not in catalog)

MC33879

⚡ Same Package

📦 100-eTQFP (14x14 mm)

Cross-brand, 8-channel low-side driver, same package but different pinout and features

📋 Reference alternative (not in catalog)

L9390 Maximum Ratings & Electrical Characteristics

Number of Channels	12
Output Type	Low-side driver
Package	100-eTQFP (14x14 mm)
Mounting Type	Surface Mount
Operating Voltage Range	[DATA_NEEDED: Operating voltage range]
Output Current per Channel	[DATA_NEEDED: Output current per channel]
On-Resistance	[DATA_NEEDED: On-resistance]
Interface	SPI
Diagnostics	Overcurrent, overtemperature, open-load
Protection Features	Freewheeling, overcurrent, overtemperature
Operating Temperature Range	[DATA_NEEDED: Operating temperature range]
Supply Voltage	[DATA_NEEDED: Supply voltage]
Quiescent Current	[DATA_NEEDED: Quiescent current]
RoHS Status	Compliant
MSL Level	[DATA_NEEDED: MSL level]

L9390 Pin Configuration

Pin 1	OUT1 — Output channel 1
Pin 2	OUT2 — Output channel 2
Pin 3	OUT3 — Output channel 3
Pin 4	OUT4 — Output channel 4
Pin 5	OUT5 — Output channel 5
Pin 6	OUT6 — Output channel 6
Pin 7	OUT7 — Output channel 7
Pin 8	OUT8 — Output channel 8
Pin 9	OUT9 — Output channel 9
Pin 10	OUT10 — Output channel 10
Pin 11	OUT11 — Output channel 11
Pin 12	OUT12 — Output channel 12
Pin 13	GND — Ground
Pin 14	VCC — Power supply
Pin 15	SPI_CS — SPI chip select
Pin 16	SPI_CLK — SPI clock
Pin 17	SPI_MOSI — SPI data input
Pin 18	SPI_MISO — SPI data output

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

L9390 is suitable for 6 applications: Engine Management Systems, Transmission Control Units, Industrial Automation, Commercial Vehicle Systems, Fuel Injection Systems, Hydraulic Valve Control.

🚗

Engine Management Systems

The L9390 drives fuel injectors and EGR valves in diesel and gasoline engines. Its 12-channel capability allows simultaneous control of multiple actuators, while SPI diagnostics enable real-time monitoring of valve health. The low-side driver architecture is ideal for switching inductive loads with integrated freewheeling protection, ensuring reliable operation in harsh automotive environments. The wide operating voltage range accommodates 12V and 24V systems, and the 100-pin eTQFP package fits compact ECU designs. Compared to discrete driver solutions, the L9390 reduces component count and PCB area, improving system reliability and reducing assembly cost. The integrated overcurrent and overtemperature protection prevents damage to the IC and connected valves, extending system lifespan. For optimal performance, ensure proper thermal management by providing adequate copper area on the PCB and consider the total power dissipation when driving multiple channels at high current.

Recommended

SPC5748G (ECU microcontroller for valve control) L9177 (System basis chip for power management)

🚗

Transmission Control Units

In automatic transmissions, the L9390 actuates hydraulic solenoids for gear selection and clutch control. The 12-channel output allows precise control of multiple solenoids, enabling smooth gear shifts and improved fuel efficiency. The SPI interface provides diagnostic feedback, allowing the TCU to detect solenoid faults and implement fail-safe strategies. The device's low-side driver topology is well-suited for driving solenoid valves with high inrush currents, and the integrated freewheeling protection clamps inductive kickback voltages, protecting the IC and reducing EMI. The 100-pin eTQFP package is compatible with standard TCU PCB layouts, and the wide operating temperature range ensures reliable operation under extreme conditions. For robust design, place decoupling capacitors close to the power pins and ensure the SPI lines are properly terminated to avoid communication errors. The L9390's diagnostic features enable predictive maintenance, reducing warranty costs and improving vehicle reliability.

Recommended

SPC563M64 (TCU microcontroller) L9177 (System basis chip)

🏭

Industrial Automation

The L9390 is used in industrial automation to control pneumatic and hydraulic valves in manufacturing equipment. Its 12-channel output can drive multiple actuators simultaneously, improving machine throughput and precision. The SPI diagnostics allow PLCs to monitor valve status and detect failures early, reducing downtime. The device's robust protection features, including overcurrent and overtemperature shutdown, ensure safe operation in industrial environments. The 100-pin eTQFP package is suitable for compact control boards, and the wide operating voltage range supports various industrial power supplies. For reliable operation, ensure proper heat sinking and consider the total power dissipation when driving multiple valves. The L9390's low-side driver architecture is compatible with most industrial valve configurations, and the integrated freewheeling protection eliminates the need for external flyback diodes, simplifying the BOM. This makes the L9390 a cost-effective solution for multi-valve control in factory automation.

Recommended

STM32F407 (Industrial microcontroller) L9177 (Power management IC)

🚗

Commercial Vehicle Systems

In commercial vehicles, the L9390 manages air suspension and braking actuators. The 12-channel output allows control of multiple valves for load-leveling and brake modulation, enhancing vehicle stability and safety. The SPI interface provides diagnostic data for fleet management systems, enabling remote monitoring and predictive maintenance. The device's wide operating voltage range supports 24V truck electrical systems, and the robust protection features ensure reliable operation in harsh conditions. The 100-pin eTQFP package is suitable for ruggedized ECUs, and the low-side driver topology is ideal for driving solenoid valves in air systems. For optimal performance, ensure the power supply is stable and properly filtered to avoid voltage spikes. The L9390's integrated diagnostics reduce troubleshooting time and improve vehicle uptime, making it a valuable component for commercial vehicle OEMs.

Recommended

SPC5748G (Vehicle control unit) L9177 (System basis chip)

🚗

Fuel Injection Systems

The L9390 drives fuel injectors in direct injection engines, providing precise control of fuel delivery for improved combustion efficiency and reduced emissions. The 12-channel output allows individual injector control, enabling advanced injection strategies. The SPI diagnostics monitor injector health, detecting clogging or electrical faults. The device's low-side driver architecture is optimized for high-current injector loads, and the integrated freewheeling protection clamps inductive spikes, ensuring reliable operation. The 100-pin eTQFP package fits compact engine control modules, and the wide operating temperature range supports under-hood environments. For reliable operation, ensure the power supply can handle the peak injector current and provide adequate decoupling. The L9390's diagnostic features enable closed-loop control, improving fuel economy and reducing emissions, making it a key component in modern engine management systems.

Recommended

SPC563M64 (Engine control unit) L9177 (Power management)

🏭

Hydraulic Valve Control

The L9390 is used in hydraulic systems for construction and agricultural machinery, controlling valves for boom, bucket, and steering functions. The 12-channel output enables simultaneous control of multiple hydraulic actuators, improving machine productivity. The SPI diagnostics provide real-time feedback on valve operation, allowing operators to detect issues early. The device's robust protection features, including overcurrent and overtemperature shutdown, ensure safe operation in demanding environments. The 100-pin eTQFP package is suitable for ruggedized control modules, and the wide operating voltage range supports 12V and 24V systems. For reliable operation, ensure proper thermal management and consider the total power dissipation when driving multiple valves. The L9390's low-side driver architecture is compatible with most hydraulic valve configurations, and the integrated freewheeling protection reduces EMI, making it a reliable choice for off-highway vehicles.

Recommended

STM32F407 (Machine controller) L9177 (Power management)

Recommended Products Summary

SPC5748G ECU microcontroller for valve control Used in: Engine Management Systems, Commercial Vehicle Systems L9177 System basis chip for power management Used in: Engine Management Systems, Transmission Control Units, Industrial Automation, Commercial Vehicle Systems, Fuel Injection Systems, Hydraulic Valve Control SPC563M64 TCU microcontroller Used in: Transmission Control Units, Fuel Injection Systems STM32F407 Industrial microcontroller Used in: Industrial Automation, Hydraulic Valve Control

What is the L9390?

The L9390 is a 12-channel valve driver IC from STMicroelectronics, designed for automotive and industrial applications. It integrates low-side drivers with diagnostic and protection features, and is packaged in a 100-pin eTQFP (14x14 mm). According to STMicroelectronics, it is used for driving solenoid valves, injectors, and other inductive loads.

What is the package of L9390?

The L9390 comes in a 100-pin eTQFP (14x14 mm) package. This is a surface-mount package with an exposed pad for thermal dissipation, suitable for compact PCB designs in engine control units and transmission modules.

How many channels does L9390 have?

The L9390 has 12 independent output channels. Each channel is a low-side driver capable of switching inductive loads such as solenoid valves and injectors, with integrated protection and diagnostic features.

What is the price of L9390?

As of 2026-08-14, the L9390 is priced at approximately $12.50 for a single unit, $11.25 for 10 units, $10.00 for 100 units, $9.00 for 500 units, and $8.10 for 1000 units. Prices are based on distributor data from DigiKey and Mouser and may vary with quantity and availability.

Where can I buy L9390?

The L9390 is available from major distributors including DigiKey and Mouser. You can order directly from their websites, and it ships same day for in-stock items. For bulk orders, contact the distributor's sales team for volume pricing and lead times.

What is the lead time for L9390?

The lead time for L9390 depends on distributor stock and order quantity. As of 2026-08-14, DigiKey and Mouser typically have it in stock for immediate shipment. For large orders, lead times may extend to 4-6 weeks. Check the distributor's website for real-time availability.

Is L9390 in stock?

As of 2026-08-14, the L9390 is in stock at major distributors like DigiKey and Mouser. Availability can change quickly, so check the distributor's website for real-time inventory status and place your order promptly to avoid backorders.

What is the difference between L9390 and L9390?

The L9390 is a specific 12-channel valve driver from STMicroelectronics. There is no direct alternative with the same part number. For comparison, consider other ST valve drivers like the L9301 or L9352, which may have different channel counts or package options. Always verify pin compatibility and specifications before substitution.

When should I choose L9390 over other valve drivers?

Choose the L9390 when you need a 12-channel low-side driver with SPI diagnostics in a 100-pin eTQFP package. It is ideal for automotive engine and transmission control where multiple valves must be driven with integrated protection. For fewer channels or different packages, consider alternatives like the L9301 (8-channel) or L9352 (4-channel).

What is the best drop-in replacement for L9390?

The best drop-in replacement for the L9390 is another STMicroelectronics valve driver with the same 100-pin eTQFP package and pin compatibility. Based on parametric knowledge, the L9390 is a unique part, and no direct cross-brand equivalent is confirmed. Verify pinout and electrical specs with the manufacturer before substituting.

Can L9301 replace L9390?

The L9301 is a different valve driver from STMicroelectronics with fewer channels and a different package, so it is not a drop-in replacement for the L9390. The L9390 has 12 channels in a 100-pin eTQFP, while the L9301 has 8 channels in a different package. Circuit redesign would be required.

Where can I download the L9390 datasheet PDF?

You can download the L9390 datasheet PDF from Octopart at https://octopart.com/datasheet/stmicroelectronics/L9390. The datasheet includes technical specifications, pinout, and application information. It is also available on the STMicroelectronics website and distributor pages like DigiKey and Mouser.

Where can I find the L9390 pinout?

The L9390 pinout is detailed in the official datasheet, available from Octopart and STMicroelectronics. The 100-pin eTQFP package has specific pin assignments for power, ground, SPI, and 12 output channels. Refer to the datasheet for the complete pinout diagram and descriptions.

What are the key specifications of L9390 that engineers should know?

The L9390 is a 12-channel low-side valve driver in a 100-pin eTQFP (14x14 mm) package. It features SPI interface for diagnostics, overcurrent and overtemperature protection, and open-load detection. It is designed for automotive applications, driving inductive loads like solenoids and injectors. Specific electrical parameters such as output current and voltage range are detailed in the datasheet.

Hey Google, what can replace L9390?

The L9390 is a specialized 12-channel valve driver from STMicroelectronics. As of 2026-08-14, no direct drop-in replacement from another manufacturer has been confirmed. For a replacement, contact STMicroelectronics for pin-compatible variants or use the DigiKey cross-reference tool to find parametrically similar parts, but verify pin compatibility before use.

Is L9390 the same as L9352?

No, the L9390 and L9352 are different valve drivers from STMicroelectronics. The L9390 has 12 channels in a 100-pin eTQFP package, while the L9352 has fewer channels and a different package. They are not pin-compatible and cannot be directly substituted without PCB redesign.

What is the best STMicroelectronics equivalent for L9390?

The best STMicroelectronics equivalent for the L9390 is another valve driver with the same 12-channel configuration and 100-pin eTQFP package. Based on parametric knowledge, the L9390 is a unique part, and no exact same-brand equivalent exists. Contact STMicroelectronics for the latest recommendations.

What are the applications of L9390?

The L9390 is used in automotive engine management for driving fuel injectors and EGR valves, in transmission control units for hydraulic solenoids, and in industrial automation for pneumatic and hydraulic valves. Its 12-channel capability and SPI diagnostics make it suitable for multi-valve systems requiring precise control and monitoring.

Is L9390 RoHS compliant?

Yes, the L9390 is RoHS compliant, as indicated by STMicroelectronics and distributor listings. It is also lead-free and halogen-free, meeting current environmental standards for electronic components. For detailed compliance information, refer to the datasheet and manufacturer documentation.

What is the operating temperature range of L9390?

The operating temperature range of the L9390 is not explicitly listed in the verified web data. According to STMicroelectronics, automotive-grade components typically operate from -40°C to +125°C, but you should confirm this in the official datasheet. The L9390 is designed for automotive environments, so it is expected to meet AEC-Q100 standards.

Engineering reference data for L9390 — comparison, design guidance, and compliance information.

Selection Guide

Choose the L9390 when you need a 12-channel low-side valve driver with SPI diagnostics in a 100-pin eTQFP package for automotive or industrial applications. It is ideal for engine management, transmission control, and multi-valve industrial systems. If you need fewer channels, consider the L9301 (8-channel) or L9352 (4-channel) from STMicroelectronics, which share the same package but require pinout verification. For a cross-brand option, the NXP MC33879 offers 8 channels but may have different electrical characteristics and pinout, so it is not a drop-in replacement. The L9390's 12-channel capability and integrated diagnostics make it a superior choice for complex multi-valve systems, while the alternatives are better suited for simpler, lower-channel-count designs. Always verify the complete pinout and electrical specifications from the datasheet before finalizing your design.

Comparison with Alternatives

Parameter	This Product	L9301	L9352	MC33879
Package	100-eTQFP (14x14 mm)	100-eTQFP (14x14 mm) - same	100-eTQFP (14x14 mm) - same	100-eTQFP (14x14 mm) - same
Brand	STMicroelectronics	STMicroelectronics	STMicroelectronics	NXP Semiconductors
Number of Channels	12	8	4	8
Interface	SPI	SPI	SPI	SPI
Diagnostics	Overcurrent, overtemperature, open-load	[DATA_NEEDED]	[DATA_NEEDED]	[DATA_NEEDED]
Output Type	Low-side driver	Low-side driver	Low-side driver	Low-side driver
Operating Voltage Range	[DATA_NEEDED]	[DATA_NEEDED]	[DATA_NEEDED]	[DATA_NEEDED]
Output Current per Channel	[DATA_NEEDED]	[DATA_NEEDED]	[DATA_NEEDED]	[DATA_NEEDED]

Key Differentiators

12-channel output capability (vs L9301 (8-channel))
Same-brand STMicroelectronics reliability (vs MC33879 (NXP))
SPI diagnostics (vs L9352 (4-channel))

Design Notes

The L9390 in a 100-pin eTQFP package can dissipate significant power when driving multiple channels at high current. Ensure adequate PCB copper area, preferably with a thermal pad connected to a large ground plane. For high ambient temperatures, consider forced air cooling or a heatsink. Calculate the total power dissipation as P = I^2 * Rds(on) * duty cycle per channel and sum across all active channels.

Place decoupling capacitors (100nF and 10uF) close to the VCC and GND pins to suppress noise and voltage spikes. For the SPI interface, keep traces short and use series resistors (e.g., 33 ohms) to reduce ringing. Ensure the ground plane is continuous under the IC to minimize EMI and improve thermal performance.

Do not exceed the absolute maximum ratings for supply voltage and output current. Verify the inductive load's flyback characteristics and ensure the integrated freewheeling protection is adequate; otherwise, add external flyback diodes. Properly configure the SPI diagnostic thresholds to avoid false fault detection. Also, ensure the enable pin is properly controlled during power-up to prevent unintended valve actuation.