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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Distribution Switches, Load Drivers

STMicroelectronics L9222D013TR

Name: L9222D013TR
Brand: STMicroelectronics
SKU: L9222D013TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L9222D013TR

Manufacturer:: STMicroelectronics

Category:: Power Distribution Switches, Load Drivers

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: L9222D013TR.pdf

Description:: IC PWR SWITCH BIPOLAR 1:1 20SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L9222D013TR from STMicroelectronics is a quad inverting transistor switch IC designed for high-voltage, high-current switching of inductive loads. It delivers up to 50 V output voltage, 1.2 A per channel, and features TTL-compatible inputs, integral clamp diodes, and very low saturation voltage (0.3 V at 0.1 A). It drives relays, solenoids, unipolar stepper motors, and LEDs in industrial control modules.

For engineers reviewing the L9222D013TR datasheet, L9222D013TR pinout, L9222D013TR application, or L9222D013TR equivalent, key selection criteria include output sustaining voltage (46 V), propagation delay (20 µs), thermal resistance (90 °C/W), clamp diode forward voltage (1.8 V at 0.6 A), and enable-controlled quad-channel architecture.

Technical Context

The L9222D013TR integrates four open-collector NPN transistors with cathode-connected clamp diodes on a single die, enabling simultaneous or independent switching of inductive loads. Each channel shares a common emitter tied to GND and a global TTL-compatible enable input that overrides individual logic inputs.

Its architecture supports parallel operation of channels for higher current capability and includes built-in suppression for back-EMF from coils. The device operates across –40 °C to +125 °C junction temperature with logic supply voltage up to 7 V and input voltage tolerance from –0.7 V to VCC + 0.3 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Up to 50 V - sustains voltage during inductive flyback without external snubbers
Output Current	1.2 A max per channel - drives heavy-duty relays and solenoids directly
V_CE(sat)	0.3 V @ 0.1 A - minimizes power loss and heat generation at low load
Propagation Delay	20 µs (high-to-low & low-to-high) - ensures predictable timing in real-time control loops
Clamp Diode V_F	1.8 V @ 0.6 A - provides fast, low-loss energy recirculation for coil demagnetization
Thermal Resistance	90 °C/W (junction-to-ambient) - defines heatsinking requirement for continuous 1.2 A operation
Enable Input Logic	TTL-compatible (V_ENL ≤ 0.8 V, V_ENH ≥ 2.0 V) - interfaces directly with microcontrollers and FPGAs

Pinout & Package

Package: SO20L (20-pin small outline, gull-wing, 1.27 mm pitch), RoHS-compliant, surface-mountable.

Pin/Terminal	Circuit Role	Design Meaning
1–4, 17–20	Input (IN1–IN4, EN1–EN4)	Four independent TTL-compatible logic inputs controlling each transistor base
5–8	Output (OUT1–OUT4)	Open-collector NPN collector terminals - connect to load anode; cathode to V_CC
9	GND	Common emitter reference for all four transistors and clamp diode cathodes
10–16	V_CC, Enable, NC	V_CC (logic supply), global enable (EN), and no-connect pins per SO20L pinout layout
18–19	NC	No-connect - internal die pads not bonded; must be left floating or grounded per layout guidelines

Key Features

Feature	Design Value
Integrated clamp diodes	Eliminates need for external flyback diodes in relay/solenoid drive circuits
Quad-channel parallel capability	Channels can be paralleled to support >1.2 A loads without external current sharing components
TTL-compatible interface	Direct connection to 5 V logic families without level-shifting circuitry
Low V_CE(sat)	Reduces conduction loss by >40% vs. standard bipolar switches at 0.3 A
Wide operating temperature	Rated for –40 °C to +125 °C junction - suitable for under-hood and factory-floor environments

Applications

Industrial Relay Control

Automotive Solenoid Driver

Use Scenario: Controlling 24 V DC industrial relays in PLC I/O modules with 100 ms switching cycles.

IC Role / Device Role / Timing Role: Quad NPN switch providing isolated, current-limited, clamped output stages for relay coil energization/de-energization.

Use Value: Eliminates discrete diode placement and reduces PCB area by 35% per channel versus discrete transistor+diode solutions.

Use Scenario: Driving fuel injector solenoids in 12 V automotive engine control units requiring precise pulse-width modulation.

IC Role / Device Role / Timing Role: High-speed, high-current sink driver with <20 µs turn-off delay to support 10 kHz PWM duty cycling.

Use Value: Clamp diode limits back-EMF to <50 V, protecting MCU GPIOs and reducing EMI emissions by 12 dBµV/m.

Unipolar Stepper Motor Interface

LED Array Power Switch

Use Scenario: Sequencing phase currents in 5 V/1.2 A unipolar stepper motors used in medical infusion pumps.

IC Role / Device Role / Timing Role: Four synchronized, enable-gated transistor outputs driving motor winding anodes with shared ground return.

Use Value: Enables full-step and half-step modes with <1% current mismatch between channels due to matched on-resistance.

Use Scenario: Switching 48 V LED strings (12 × 4 V) in commercial signage systems with thermal derating above 60 °C.

IC Role / Device Role / Timing Role: High-voltage, constant-current sink stage with integrated thermal shutdown margin via R_{th j-amb} = 90 °C/W.

Use Value: Supports 1.2 A continuous per channel at ambient ≤55 °C without external heatsink, reducing BOM count by 4x.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad transistor switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ULN2803ADWR	Higher V_CE(sus) (50 V), but lower I_OUT (0.5 A), no enable input, 8-channel	Best for low-current, multi-channel logic-level loads; lacks global enable and parallel capability	Choose when needing >4 channels at lower current and no enable control required
TB6549FG	Higher I_OUT (3.5 A), integrated current sense, SPI interface, larger QFN package	Targeted at motor drivers with diagnostics; overkill for simple relay/solenoid switching	Choose only if closed-loop current monitoring or digital configuration is mandatory

Compared with ULN2803ADWR and TB6549FG, the L9222D013TR uniquely balances 1.2 A per channel, integrated enable, and compact SO20L footprint-making it optimal for space-constrained, medium-power industrial I/O where simplicity and thermal efficiency are prioritized over diagnostics or channel count.

Availability

L9222D013TR is available at Aetrix Electronics and suitable for industrial PLC modules, automotive body control units, medical pump controllers, and commercial LED lighting systems requiring stable component supply and long-term manufacturability.

Supply support for L9222D013TR 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, microcontrollers, and automotive-grade ICs.

The L9222 series belongs to ST's industrial power switch product line, engineered specifically for robust, high-voltage, high-current switching in harsh-environment control applications where reliability and integrated protection are critical.

FAQ

What is the maximum safe operating voltage for L9222D013TR outputs?

The L9222D013TR guarantees 46 V output sustaining voltage (V_CE(sus)) under specified test conditions (I_OUT = 100 mA, T_j = 25 °C). Absolute maximum rating is 50 V, but sustained operation above 46 V risks breakdown during inductive transients unless external clamping is added.

Can multiple L9222D013TR channels be paralleled to increase current capacity?

Yes - the datasheet explicitly states "The switches of the same device may be paralleled." Matching V_CE(sat) and thermal coupling ensure balanced current sharing. For 2.4 A total, use two channels per load with shared emitter and output routing to minimize inductance imbalance.

Does L9222D013TR require external flyback diodes when driving relays?

No - each channel includes an integral clamp diode with 100 µA reverse leakage at 50 V and 1.8 V forward drop at 0.6 A. External diodes are unnecessary for standard 24 V relay coils; however, high-energy loads (>100 mJ) may benefit from supplemental TVS devices.

Is L9222D013TR pin-compatible with earlier L9222 variants in SO20L package?

Yes - L9222D013TR uses the same SO20L mechanical outline and pin function mapping as documented in Figure 5 and Table 1. Pin numbering, terminal roles (IN/OUT/GND/V_CC/EN), and thermal pad layout are identical across all SO20L versions of the L9222 family.

L9222D013TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Switch Type:: General Purpose

Number of Outputs:: 4

Ratio - Input:Output:: 1:1

Output Configuration:: High Side

Output Type:: Bipolar

Interface:: On/Off

Voltage - Load:: 4.75V ~ 5.25V

Voltage - Supply (Vcc/Vdd):: -

Current - Output (Max):: -

Rds On (Typ):: -

Input Type:: Inverting

Features:: -

Fault Protection:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SO

L9222D013TR FAQ

1.How can I place an order for L9222D013TR through Aetrix?

Please submit a Request for Quotation (RFQ) for L9222D013TR 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 L9222D013TR reliable?

The price and inventory of L9222D013TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9222D013TR is usually 5 days.

3.What payment methods are accepted for L9222D013TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9222D013TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L9222D013TR?

L9222D013TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L9222D013TR 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 L9222D013TR?

For technical support, including L9222D013TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9222D013TR requirements.

6.How does Aetrix verify that L9222D013TR is sourced from the original manufacturer or authorized distributors?

All L9222D013TR 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 L9222D013TR meets industry standards.

7.What is the process for return or replacement of L9222D013TR?

All L9222D013TR units undergo pre-shipment inspection (PSI). If there is an issue with L9222D013TR, 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 L9222D013TR part is unused and in its original packaging.

Return procedure for L9222D013TR:

1.Submit a request within 90 days.

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

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