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Texas Instruments SN7407DR
- Part No.:
- SN7407DR
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN7407DR.pdf
- Description:
- IC BUF NON-INVERT 5.25V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,749
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Product details
Overview
SN7407DR from Texas Instruments is a hex buffer/driver IC with open-collector high-voltage outputs, designed for TTL-to-MOS level translation and driving high-current loads such as lamps or relays. It features 30 V output breakdown voltage, 40 mA maximum sink current per channel, 14 ns typical propagation delay, and operates from 4.75 V to 5.25 V supply at 0°C to 70°C ambient.
For engineers reviewing the SN7407DR datasheet, SN7407DR pinout, SN7407DR application, or SN7407DR equivalent, this device is selected for high-voltage interface buffering in industrial control I/O, LED driver staging, relay driver logic, and legacy TTL system expansion where open-collector pull-down capability and 30 V tolerance are required.
Technical Context
The SN7407DR implements six independent non-inverting buffers, each with an open-collector output stage capable of sinking up to 40 mA while withstanding up to 30 V on the output node. Its inputs are TTL-compatible (VIH = 2 V min, VIL = 0.8 V max) and diode-clamped to suppress transmission-line ringing.
It operates strictly as a level-shifting buffer - no internal pull-ups, no active-high outputs - requiring external pull-up resistors for logic-high assertion. The device exhibits 14 ns average propagation delay under 5 V/15 pF load conditions and dissipates 145 mW typical power at full drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Rating | 30 V max - enables direct interface to 24 V industrial logic, lamp drivers, and relay coils without level-shifting circuitry |
| Sink Current per Channel | 40 mA max - sufficient to drive multiple TTL inputs, LEDs, or small solenoids directly |
| Propagation Delay | 14 ns typical - supports reliable operation up to ~35 MHz toggle rate in buffered control paths |
| Supply Voltage Range | 4.75 V to 5.25 V - tightly regulated 5 V TTL-compatible operation; not suitable for wide-input or battery-backed systems |
| Input Compatibility | TTL-level (VIH ≥ 2 V, VIL ≤ 0.8 V) - ensures seamless integration with 74LS, 74F, and standard TTL families |
| Operating Temperature | 0°C to 70°C - commercial-grade rating; not qualified for extended industrial or automotive temperature ranges |
| Package Type | 14-pin SOIC (D) - surface-mount footprint with 8.65 mm × 3.91 mm body size and 1.27 mm lead pitch |
Pinout & Package
SN7407DR is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package with 1.27 mm lead pitch, 8.65 mm × 3.91 mm body dimensions, and RoHS-compliant NiPdAu lead finish. Moisture sensitivity level is Level-1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Input A1–A6 | Active-high TTL-compatible inputs; must be tied to VCC or GND if unused to prevent floating states |
| 2, 4, 6, 8, 10, 12 | Output Y1–Y6 | Open-collector outputs - require external pull-up resistors; each sinks up to 40 mA to GND |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry; must be low-impedance connection |
| 14 | VCC | +5 V supply pin; requires local 0.1 µF bypass capacitor placed adjacent to pin for noise suppression |
| NC (pins 1, 5, 7, 11, 15, 17 in LCCC variant) | No Connect | Not bonded in SOIC (D) package - left unconnected; no electrical function or thermal role |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage open-collector outputs | 30 V breakdown rating per output - eliminates need for external voltage translators when interfacing with 24 V PLC I/O or indicator lamps |
| High sink-current capability | 40 mA per channel - drives up to 10 standard TTL inputs or a 24 V/10 mA LED string without external transistor staging |
| TTL input compatibility | VIH = 2 V min, VIL = 0.8 V max - interoperable with legacy 74LS, 74F, and 74ALS logic without level-shifting resistors |
| Diode-clamped inputs | Integrated clamping diodes - suppress overshoot/ringing on long PCB traces, reducing EMI and signal integrity risk |
| Low propagation delay | 14 ns typical - enables use in timing-critical enable/strobe paths for peripheral controllers and data acquisition modules |
Applications
| Industrial Control I/O Expansion | LED & Lamp Driver Staging |
|---|---|
|
Use Scenario: Adding isolated digital output capability to a microcontroller-based PLC module with 24 V field-side signaling. IC Role / Device Role / Timing Role: Buffering MCU GPIO signals to drive 24 V indicator lamps and pilot lights via open-collector outputs with external 24 V pull-ups. Use Value: Eliminates discrete transistor stages; leverages 30 V output rating and 40 mA sink to directly switch lamps rated up to 24 V/20 mA. |
Use Scenario: Driving multi-segment status LEDs on a network switch front panel where each segment requires independent on/off control at 5 V or 12 V. IC Role / Device Role / Timing Role: Providing six independent open-collector drivers that sink current from LED anodes tied to regulated rail voltages. Use Value: Enables flexible voltage selection (5 V, 12 V, or 24 V) per LED string using single-resistor current limiting per channel. |
| Relay Driver Interface | TTL System Bus Buffering |
|
Use Scenario: Controlling electromechanical relays in HVAC control panels where MCU outputs must isolate and amplify switching signals. IC Role / Device Role / Timing Role: Acting as a level-translating buffer between 3.3 V/5 V logic and 12 V/24 V relay coil circuits, with flyback diode support. Use Value: 40 mA sink current safely drives relay coils with DC resistance ≥300 Ω at 12 V; 30 V rating accommodates inductive kickback suppression. |
Use Scenario: Isolating and strengthening address/data bus lines in legacy 8-bit embedded systems using 74LS logic families. IC Role / Device Role / Timing Role: Hex non-inverting buffer providing fan-out extension and noise margin improvement on shared bus segments. Use Value: TTL-compatible inputs accept LS-family outputs; open-collector outputs allow wired-AND bus arbitration and mixed-voltage domain interfacing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex open-collector buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN7406DR | Same 14-pin SOIC package and pinout; lower 30 V output rating but only 20 mA sink current per channel | Less suitable for driving higher-current loads like 24 V lamps or relay coils requiring >20 mA | Select SN7406DR only when load current ≤20 mA and cost optimization is prioritized over drive strength |
| 74HC07PW | CMOS-based, 6 V max output voltage, 25 mA sink, 2 V to 6 V supply range, faster 8 ns propagation | Cannot interface with >6 V external circuits; unsuitable for 12 V/24 V lamp or relay control | Choose 74HC07PW for low-voltage, high-speed 3.3 V/5 V logic buffering where high-voltage tolerance is unnecessary |
Compared with SN7407DR, SN7406DR offers identical form factor but reduced drive strength, while 74HC07PW provides superior speed and supply flexibility at the cost of high-voltage capability - making SN7407DR uniquely suited for 24 V industrial interface tasks.
Availability
SN7407DR is available at Aetrix Electronics and suitable for industrial control I/O expansion, LED/lamp driver staging, relay driver interface, and TTL system bus buffering requiring stable component supply across production lifecycles.
Supply support for SN7407DR 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 decades of heritage in industry-standard logic families including the 7400 series.
SN7407DR belongs to TI's legacy TTL-compatible logic portfolio, engineered specifically for robust voltage-level translation and high-sink-current interfacing in industrial and instrumentation applications.
FAQ
What is the maximum output voltage rating of the SN7407DR?
The SN7407DR has a guaranteed minimum output breakdown voltage of 30 V. This means each open-collector output can safely withstand up to 30 V when in the OFF (high-impedance) state - enabling direct connection to 24 V industrial control rails and lamp circuits without additional protection components. This rating is confirmed in Section 6.1 Absolute Maximum Ratings of the official TI datasheet SDLS032H.
Can the SN7407DR drive a 24 V LED directly?
Yes, the SN7407DR can drive a 24 V LED directly when used with an appropriate current-limiting resistor on the anode side and the LED cathode connected to an SN7407DR output pin. Each output sinks up to 40 mA, so it supports LEDs with forward current ≤40 mA. The 30 V output rating ensures safe operation with 24 V supplies, and the open-collector architecture allows flexible rail selection - confirmed in the "Typical Application" section (Section 9.2) of the SN7407DR datasheet.
Does the SN7407DR have internal pull-up resistors on its outputs?
No, the SN7407DR does not include internal pull-up resistors. Its outputs are strictly open-collector, meaning they can only actively pull down to GND and require external pull-up resistors to establish a logic HIGH state. This design enables voltage-level flexibility - e.g., pulling up to 5 V, 12 V, or 24 V - but mandates external components for proper logic operation. This behavior is explicitly defined in the functional description (Section 8.1) and pin function table (Section 5) of the SN7407DR datasheet.
What is the recommended bypass capacitor for the SN7407DR VCC pin?
Texas Instruments recommends a 0.1 µF ceramic bypass capacitor placed as close as possible to the VCC pin (pin 14) and GND (pin 7) of the SN7407DR. This minimizes high-frequency supply noise and prevents output instability during fast switching transitions. The recommendation is specified in Section 10 ("Power Supply Recommendations") of the SN7407DR datasheet SDLS032H and applies universally across all operating conditions for this SOIC-packaged device.
Is the SN7407DR pin-compatible with the SN7406DR?
Yes, the SN7407DR and SN7406DR share identical 14-pin SOIC (D) packaging, pinout configuration, and functional mapping - both feature six independent open-collector buffer channels with inputs on odd pins and outputs on even pins. However, SN7407DR supports 40 mA sink current versus 20 mA for SN7406DR, and both maintain the same 30 V output rating. This pin-for-pin compatibility is verified in TI's official package drawings and orderable addendum for both parts.
SN7407DR 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:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 6
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- Open Collector
- Current - Output High, Low:
- -, 40mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SN7407DR FAQ
1.How can I place an order for SN7407DR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN7407DR 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 SN7407DR reliable?
The price and inventory of SN7407DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN7407DR is usually 5 days.
3.What payment methods are accepted for SN7407DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN7407DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN7407DR?
SN7407DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN7407DR 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 SN7407DR?
For technical support, including SN7407DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN7407DR requirements.
6.How does Aetrix verify that SN7407DR is sourced from the original manufacturer or authorized distributors?
All SN7407DR 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 SN7407DR meets industry standards.
7.What is the process for return or replacement of SN7407DR?
All SN7407DR units undergo pre-shipment inspection (PSI). If there is an issue with SN7407DR, 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 SN7407DR part is unused and in its original packaging.
Return procedure for SN7407DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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