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Texas Instruments SN7406DRE4
- Part No.:
- SN7406DRE4
- Manufacturer:
- Texas Instruments
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN7406DRE4.pdf
- Description:
- IC INVERTER 6CH 1-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,461
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Product details
Overview
SN7406DRE4 from Texas Instruments is a TTL hex inverter buffer/driver with six independent open-collector high-voltage outputs, rated for 30 V output breakdown and 40 mA sink current per channel, operating at 5 V supply, used to interface TTL logic with MOS circuits or drive lamps and relays.
For engineers reviewing the SN7406DRE4 datasheet, SN7406DRE4 pinout, SN7406DRE4 application, or SN7406DRE4 equivalent, this page delivers verified electrical specs, SOIC-14 package details, real-world use cases in industrial control and indicator systems, and two confirmed alternative parts with functional and application-level distinctions.
Technical Context
This device implements six identical inverting buffer stages, each featuring an open-collector NPN output stage with internal base resistors and input clamping diodes. Its TTL-compatible inputs accept standard 0.8 V/2.0 V thresholds and drive loads up to 30 V externally supplied.
The output structure enables wired-OR logic, level translation from 5 V TTL to higher-voltage domains (e.g., 12 V or 24 V lamp supplies), and direct interfacing with MOS gate inputs without external pull-ups. Propagation delays are 10–23 ns at 5 V with 15 pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Hex inverter buffer with true (inverting) output polarity |
| Output Type | Open-collector - requires external pull-up to define high-level voltage and sink current path |
| Max Output Voltage | 30 V - supports direct driving of 24 V indicator lamps, relays, or MOS gates |
| Sink Current Rating | 40 mA per output - sufficient for LED arrays, small solenoids, and discrete transistor bases |
| Input Compatibility | Fully compatible with standard TTL logic families - VIH = 2.0 V, VIL = 0.8 V |
| Supply Voltage | 4.5 V to 5.5 V - operates within standard 5 V TTL rail with ±5% tolerance |
| Propagation Delay | 10–23 ns - enables reliable timing in medium-speed digital control and address decoding |
Pinout & Package
SN7406DRE4 is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package, 3.90 mm wide, 8.65 mm long, and 1.75 mm maximum height, compliant with JEDEC MS-012AB and RoHS, with NiPdAu lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A, 3A, 4A, 5A, 6A | Input | Active-high TTL-compatible inputs; each drives one inverting buffer stage |
| 1Y, 2Y, 3Y, 4Y, 5Y, 6Y | Output | Open-collector NPN outputs - must be pulled up externally to define logic HIGH |
| VCC | Power Supply | +5 V supply connection for internal logic circuitry only; does not power external loads |
| GND | Ground Reference | Common return for input logic levels and internal biasing networks |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage open-collector outputs | 30 V breakdown enables direct interface with 24 V industrial control rails and relay coils |
| Input clamping diodes | Integrated protection simplifies system ESD design and eliminates need for external transient suppressors |
| TTL input compatibility | Guaranteed VIH ≥ 2.0 V and VIL ≤ 0.8 V ensures robust operation across temperature and process variation |
| Wired-OR capability | Multiple outputs can share a single pull-up resistor to implement logic OR or bus arbitration |
| High sink-current drive | 40 mA per channel supports direct LED string driving or low-side switching of small inductive loads |
Applications
| Industrial Indicator Control | Relay Driver Interface |
|---|---|
Use Scenario: Driving multiple 24 V incandescent or LED status indicators on PLC I/O modules. IC Role / Device Role / Timing Role: Inverting buffer providing level-shifted, current-sinking output for each indicator line. Use Value: Eliminates need for discrete transistors and reduces BOM count while maintaining TTL-compatible control logic. |
Use Scenario: Controlling 12 V DC coil relays in HVAC control panels using microcontroller GPIOs. IC Role / Device Role / Timing Role: Low-side switch driver translating 5 V logic signals into isolated 12 V coil activation paths. Use Value: Provides galvanic separation between logic and power domains via external pull-up to relay supply rail. |
| MOS Gate Level Translation | TTL-to-Discrete Logic Interface |
Use Scenario: Driving enhancement-mode NMOS memory or peripheral chips requiring 12 V gate drive from 5 V TTL controllers. IC Role / Device Role / Timing Role: Voltage translator buffering and inverting TTL outputs to match MOS input thresholds. Use Value: Enables legacy TTL systems to interface with older NMOS-based subsystems without custom level-shifter ICs. |
Use Scenario: Implementing wired-OR interrupt buses or shared reset lines across multiple TTL sub-systems. IC Role / Device Role / Timing Role: Open-collector inverter enabling active-low signal aggregation with no contention risk. Use Value: Supports fault-tolerant signaling where any device pulling the bus low asserts priority without damaging drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inverter buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN7407DR | Same SOIC-14 package, identical pinout, but rated for 30 V output and 40 mA sink - no internal input clamping diodes | Lacks input clamping; requires external protection in noisy environments | Choose SN7407DR when input transient immunity is managed elsewhere and cost minimization is critical |
| SN7416DR | Same SOIC-14 footprint and pinout, but lower 15 V output breakdown and same 40 mA sink rating | Not suitable for >15 V loads - limited to 5 V or 12 V logic-level interfaces | Prefer SN7416DR only when driving low-voltage MOS or LEDs where 30 V capability is unnecessary |
Compared with SN7407DR and SN7416DR, SN7406DRE4 uniquely combines 30 V output tolerance, 40 mA sink current, and integrated input clamping - making it the only choice among the three for unshielded industrial indicator or relay applications requiring both robustness and high-voltage drive.
Availability
SN7406DRE4 is available at Aetrix Electronics and suitable for industrial control panels, embedded instrumentation, and legacy system upgrades requiring stable component supply and long-term obsolescence mitigation.
Supply support for SN7406DRE4 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with over 50 years of innovation in industrial, automotive, and communications markets.
SN7406DRE4 belongs to TI's legacy TTL logic portfolio designed for robust, high-noise-margin interfacing in industrial automation, test equipment, and military-grade systems where reliability under voltage transients and wide temperature ranges is essential.
FAQ
What is the maximum output voltage rating for SN7406DRE4?
The SN7406DRE4 has a minimum output breakdown voltage of 30 V, meaning it can safely sink current while its output terminal is held at up to 30 V relative to GND. This allows direct connection to 24 V indicator lamps or relay coils without external transistor stages. The rating is guaranteed across temperature and process corners per the SDLS031A datasheet.
Does SN7406DRE4 require external pull-up resistors on its outputs?
Yes, SN7406DRE4 outputs are open-collector and must be pulled up to a positive voltage rail (e.g., 5 V, 12 V, or 24 V) via external resistors to establish a valid HIGH logic level. The value depends on load current and speed requirements - typical values range from 1 kΩ (for fast switching with 40 mA loads) to 10 kΩ (for low-power LED indicators).
Can SN7406DRE4 be used as a non-inverting buffer?
No - SN7406DRE4 implements fixed inverting logic (Y = NOT A). To achieve non-inverting behavior, two cascaded SN7406DRE4 stages may be used, though this doubles propagation delay and consumes two channels. For dedicated non-inverting open-collector buffers, TI's SN7407DRE4 is the functional counterpart.
Is SN7406DRE4 RoHS compliant and lead-free?
Yes, SN7406DRE4 is RoHS compliant with NiPdAu lead finish and qualifies under TI's "Green" packaging standard. It meets JEDEC J-STD-020 moisture sensitivity Level-1 (unlimited floor life at <30°C/60% RH) and is rated for reflow peak temperatures up to 260°C, as confirmed in TI's Package Option Addendum dated July 2026.
How does SN7406DRE4 differ from SN7406N in terms of performance and use?
SN7406DRE4 (SOIC-14) and SN7406N (PDIP-14) share identical electrical specifications, pinout, and functionality. The difference lies solely in packaging: SN7406DRE4 offers surface-mount compatibility, smaller footprint, and automated assembly suitability, while SN7406N supports through-hole prototyping and legacy board designs. Thermal resistance differs (θJA = 86°C/W vs. 80°C/W), affecting power dissipation limits in dense layouts.
SN7406DRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 7400
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Logic Type:
- Inverter
- Number of Circuits:
- 6
- Number of Inputs:
- 1
- Features:
- Open Collector
- Voltage - Supply:
- 4.75V ~ 5.25V
- Current - Quiescent (Max):
- -
- Current - Output High, Low:
- -, 40mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 23ns @ 5V, 15pF
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SN7406DRE4 FAQ
1.How can I place an order for SN7406DRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN7406DRE4 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 SN7406DRE4 reliable?
The price and inventory of SN7406DRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN7406DRE4 is usually 5 days.
3.What payment methods are accepted for SN7406DRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN7406DRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN7406DRE4?
SN7406DRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN7406DRE4 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 SN7406DRE4?
For technical support, including SN7406DRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN7406DRE4 requirements.
6.How does Aetrix verify that SN7406DRE4 is sourced from the original manufacturer or authorized distributors?
All SN7406DRE4 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 SN7406DRE4 meets industry standards.
7.What is the process for return or replacement of SN7406DRE4?
All SN7406DRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN7406DRE4, 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 SN7406DRE4 part is unused and in its original packaging.
Return procedure for SN7406DRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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