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STMicroelectronics E-L9338MD
- Part No.:
- E-L9338MD
- Manufacturer:
- STMicroelectronics
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
E-L9338MD.pdf
- Description:
- IC PWR DRIVER N-CHANNEL 1:1 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:991
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Product details
Overview
E-L9338MD from STMicroelectronics is a quad low-side DMOS driver IC designed for automotive and industrial load control. It features four open-drain outputs (RDS(on) = 1.5 Ω @ 25 °C, VS > 6 V), programmable signal transfer polarity (inverting/non-inverting), integrated overtemperature shutdown, and diagnostic feedback via open-drain DIAG pin - used to drive lamps, relays, and inductive solenoids in 12 V/24 V vehicle systems.
For engineers reviewing the E-L9338MD datasheet, E-L9338MD pinout, E-L9338MD application, or E-L9338MD equivalent, key selection criteria include its -24 V to +45 V input tolerance, < 2 µA standby current, controlled output slew rate (2.5–16 V/µs), integrated flyback clamping (VFB > 45 V), and status monitoring for overtemperature and supply/ground disconnection.
Technical Context
The L9338 integrates four independent low-side power switches with per-channel thermal shutdown and current limiting (min. 400 mA short-circuit current). Each channel includes Schmitt-trigger inputs (100 mV hysteresis) for noise immunity and TTL/CMOS compatibility, enabling direct microcontroller interfacing without level-shifting.
Its diagnostic logic is programmable via the PRG pin: when PRG = low, DIAG goes low during normal operation and high on fault (overtemperature, open ground/supply); when PRG = high, DIAG is active-high only during faults. The device supports both inverting and non-inverting transfer modes, with enable-controlled sleep mode (< 2 µA IQ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output type | Four independent open-drain DMOS low-side drivers |
| RDS(on) (max) | 3.5 Ω @ 125 °C, VS ≥ 6 V - ensures stable drive into 12 V lamp/relay loads at elevated junction temperature |
| Supply range (VS) | 4.5 V to 32 V - compatible with 12 V and 24 V automotive battery systems including cold-crank and load-dump conditions |
| Input voltage range | -24 V to +45 V - enables robust reverse-battery and transients protection without external circuitry |
| Standby current | < 2 µA @ Tj = 85 °C - minimizes parasitic drain in always-on vehicle modules |
| Diagnostic output | Open-drain DIAG pin reporting overtemperature, open ground, or open supply - simplifies system-level fault detection |
| Output slew rate | 2.5–16 V/µs - reduces EMI during switching of inductive loads while maintaining timing predictability |
Pinout & Package
Package: SO-20 (Small Outline, 20-pin, ECOPACK® compliant, body width 7.5 mm, lead pitch 1.27 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 (Pins 1,2,9,10) | Digital input control | TTL/CMOS-compatible Schmitt-trigger inputs with ±24 V tolerance - accept direct MCU GPIO signals and reject noise |
| EN (Pin 11) | Global enable | Active-high logic; drives device into ultra-low-power sleep mode (< 2 µA) when low |
| PRG (Pin 20) | Polarity configuration | Selects inverting or non-inverting signal transfer - sets DIAG logic polarity and IN-to-OUT mapping |
| OUT1–OUT4 (Pins 19,18,13,12) | Power output terminals | Open-drain DMOS outputs with internal flyback clamping (Vclamp ≈ 50 V) - safely recirculate inductive energy without external diodes |
| DIAG (Pin 3) | Fault reporting | Open-drain status output indicating per-channel overtemperature or global supply/ground loss - enables single-wire system diagnostics |
| VS (Pin 8) | Main power supply | High-voltage input (4.5–32 V) feeding all four drivers and internal logic - withstands automotive load-dump transients up to +45 V |
| GND (Pins 4–7,14–17) | Ground reference | Eight dedicated ground pins minimize IR drop and improve thermal dissipation - critical for sustained 0.3 A continuous sink per channel |
Key Features
| Feature | Design Value |
|---|---|
| Programmable transfer polarity | Single PRG pin selects inverting or non-inverting IN-to-OUT behavior - eliminates need for external logic inversion in diverse control architectures |
| Integrated flyback clamping | Vclamp = 45–60 V during inductive recirculation - removes requirement for external freewheeling diodes and saves PCB space |
| Per-channel thermal shutdown | Auto-recovery at ~150 °C switch-off / ~130 °C switch-on - enables fault containment without disabling entire quad driver |
| Defined off-state for open inputs | All outputs remain OFF if any IN pin is floating - prevents unintended actuation due to unconnected control lines |
| Reverse bias protection | Withstands VS = -24 V - protects against battery reversal during service or assembly without external components |
Applications
| Automotive Body Control Module | Industrial PLC Output Stage |
|---|---|
Use Scenario: Controlling door locks, interior lighting, and mirror heaters in 12 V/24 V vehicle platforms. IC Role / Device Role / Timing Role: Quad low-side driver providing isolated, current-limited, and thermally protected switching for resistive and inductive loads. Use Value: Eliminates need for discrete MOSFETs, gate drivers, and protection diodes - reduces BOM count and improves reliability under automotive temperature and transient stress. | Use Scenario: Driving 24 V DC solenoid valves and indicator lamps in factory automation I/O modules. IC Role / Device Role / Timing Role: Load interface IC with diagnostic feedback and programmable polarity - enables flexible integration with legacy and modern controller logic levels. Use Value: Built-in open-load detection and overtemperature reporting reduce system-level sensor overhead and simplify predictive maintenance. |
| Truck Trailer Control Unit | Off-Highway Equipment Lighting |
Use Scenario: Managing brake lights, turn signals, and ABS solenoids across extended cable harnesses with high EMI exposure. IC Role / Device Role / Timing Role: EMI-optimized low-side switch with controlled slew rate and wide input tolerance - ensures clean switching despite long-line inductance and noise. Use Value: Slew-rate limiting (2.5–16 V/µs) meets CISPR 25 Class 3 radiated emissions limits without added filtering components. | Use Scenario: Powering LED arrays and halogen work lamps on construction, mining, and agricultural machinery operating in -40 °C to +125 °C ambient. IC Role / Device Role / Timing Role: High-reliability load driver with extended temperature operation (Tj = -40 to +150 °C) and robust supply rejection. Use Value: Continuous 285 mA per channel at 85 °C ambient - supports sustained illumination without thermal derating in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad low-side driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPIC2810QPWPRQ1 | Higher RDS(on) (2.5 Ω typ), no programmable polarity, integrated watchdog timer | Lacks PRG-configurable transfer mode; adds safety-monitoring timer for ASIL-B systems | Choose for automotive safety-critical subsystems requiring built-in functional safety timers |
| ULN2803ADWR | Bipolar Darlington outputs (RCE(sat) ≈ 1.2 Ω), no thermal shutdown, no diagnostic output, lower voltage rating (≤ 50 V) | No overtemperature protection or fault reporting - requires external sensing and protection circuitry | Choose for cost-sensitive, non-safety, low-speed 5 V logic-driven applications with minimal thermal stress |
Compared with TPIC2810QPWPRQ1 and ULN2803ADWR, the E-L9338MD uniquely combines programmable polarity, integrated flyback clamping, per-channel thermal shutdown, and diagnostic reporting in a single SO-20 package - making it optimal for automotive body electronics where flexibility, protection, and system-level diagnostics are prioritized over basic on/off control.
Availability
E-L9338MD is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC output stages, and off-highway equipment lighting requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for E-L9338MD 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 automotive, industrial, and power management ICs with broad manufacturing and quality certifications.
The L9338 belongs to ST's Automotive Power Switch family, engineered specifically for robust, intelligent load driving in harsh 12 V/24 V environments - emphasizing protection, diagnostics, and EMC resilience over raw speed or cost.
FAQ
What is the maximum continuous output current per channel at 125 °C junction temperature?
At Tj = 125 °C, each output delivers up to 285 mA continuously without triggering thermal shutdown, based on the device's thermal resistance (Rth(j-pins) = 14 °C/W) and internal switch-off threshold (160–190 °C). This rating assumes adequate PCB copper area and airflow per ST's recommended layout in AN4128.
Does E-L9338MD require external flyback diodes when driving inductive loads?
No. The L9338 integrates active flyback clamping that limits output voltage to 45–60 V during inductive recirculation, eliminating the need for external freewheeling diodes. This is confirmed in Section 4 (Circuit Description) and Table 6 (VOClamp = 45–60 V) of the datasheet.
How does the DIAG pin behave when multiple channels experience overtemperature simultaneously?
The DIAG pin asserts high (open-drain pulled up externally) if *any* channel enters overtemperature shutdown, or if supply (VS) or ground is disconnected - regardless of how many channels are affected. Its logic polarity (active-high vs. active-low) is set by the PRG pin state, as detailed in Table 7 (Diagnostic) of the datasheet.
Can EN and PRG pins be left unconnected, or do they require external pull-up/down resistors?
Both EN and PRG have internal weak pull-downs; leaving them unconnected defaults EN to disable (sleep mode) and PRG to non-inverting mode. However, ST recommends explicit 10–100 kΩ pull-up/pull-down resistors for noise immunity in automotive harness environments, per Application Note AN4128 section 5.2.
E-L9338MD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Type:
- General Purpose
- Number of Outputs:
- 4
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- Low Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 4.5V ~ 32V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- -
- Rds On (Typ):
- 1.7Ohm
- Input Type:
- Non-Inverting
- Features:
- -
- Fault Protection:
- Over Temperature
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
E-L9338MD FAQ
1.How can I place an order for E-L9338MD through Aetrix?
Please submit a Request for Quotation (RFQ) for E-L9338MD 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 E-L9338MD reliable?
The price and inventory of E-L9338MD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for E-L9338MD is usually 5 days.
3.What payment methods are accepted for E-L9338MD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for E-L9338MD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for E-L9338MD?
E-L9338MD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your E-L9338MD 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 E-L9338MD?
For technical support, including E-L9338MD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your E-L9338MD requirements.
6.How does Aetrix verify that E-L9338MD is sourced from the original manufacturer or authorized distributors?
All E-L9338MD 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 E-L9338MD meets industry standards.
7.What is the process for return or replacement of E-L9338MD?
All E-L9338MD units undergo pre-shipment inspection (PSI). If there is an issue with E-L9338MD, 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 E-L9338MD part is unused and in its original packaging.
Return procedure for E-L9338MD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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