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Texas Instruments SN7407D
- Part No.:
- SN7407D
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN7407D.pdf
- Description:
- IC BUF NON-INVERT 5.25V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,207
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Product details
Overview
SN7407D from Texas Instruments is a hex buffer/driver IC with open-collector high-voltage outputs, designed for TTL-to-MOS level translation and high-current sinking (40 mA per channel) in industrial control and display driver circuits. It features 30 V output breakdown voltage, 14 ns typical propagation delay, and SOIC-14 packaging.
For engineers reviewing the SN7407D datasheet, SN7407D pinout, SN7407D application, or SN7407D equivalent, this page delivers verified electrical specs, package dimensions, functional pin roles, real-world use cases in indicator driving and bus interfacing, and validated alternative parts for design continuity.
Technical Context
The SN7407D implements six independent non-inverting open-collector buffers (Y = A), each capable of sinking up to 40 mA at 5 V supply while tolerating up to 30 V on the output node. Its inputs are TTL-compatible with diode clamping to suppress transmission-line reflections.
It operates across 0°C to 70°C ambient temperature, requires no pull-up resistors internally, and relies on external pull-ups for logic-high assertion. Propagation delay is 10 ns typical (RL = 110 Ω, CL = 15 pF), and power dissipation is 145 mW typical at full load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | Open-collector - enables wired-OR logic, level shifting, and direct drive of lamps/relays without internal pull-ups |
| Max Output Voltage | 30 V - supports interfacing with MOS, PMOS, or higher-voltage peripheral circuits |
| Sink Current per Channel | 40 mA - sufficient to drive LEDs, small relays, or multiple TTL inputs simultaneously |
| Propagation Delay | 14 ns typical - ensures timing compatibility in medium-speed digital control and address decoding |
| Supply Voltage Range | 4.75 V to 5.25 V - tight tolerance aligns with standard 5 V TTL rails and minimizes noise margin risk |
| Input Compatibility | Fully compatible with standard TTL families - eliminates need for level-shifting circuitry at input stage |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded systems and consumer electronics |
Pinout & Package
SN7407D is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package measuring 8.65 mm × 3.91 mm, with gull-wing leads and RoHS-compliant NiPdAu finish. It is rated MSL Level-1 (unlimited floor life) and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Input (1A–6A) | TTL-compatible digital inputs; must be tied to VCC or GND if unused to prevent floating states |
| 2, 4, 6, 8, 10, 12 | Output (1Y–6Y) | Open-collector outputs - require external pull-up resistors to define logic-high voltage and current path |
| 7 | GND | Ground reference for all internal circuitry and input/output signal return paths |
| 14 | VCC | Positive supply pin (4.75–5.25 V); requires local 0.1 µF bypass capacitor for stable operation |
| NC (Pins 1,5,7,11,15,17 in LCCC only) | No Connect | Not bonded in SOIC-14 variant - electrically isolated and must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage open-collector outputs | 30 V breakdown rating enables direct interface with MOS logic, solenoids, and LED arrays without external voltage translators |
| 40 mA sink capability per channel | Drives up to 10 standard TTL loads or a 30 mA indicator lamp without external amplification |
| TTL input compatibility with clamping diodes | Reduces ringing and overshoot on long PCB traces, simplifying layout in noisy industrial environments |
| Hex buffer architecture | Provides six independent channels in one package - reduces component count and board space vs discrete solutions |
| 14 ns typical propagation delay | Supports reliable operation in address/data bus buffering up to ~35 MHz clock domains |
Applications
| Industrial Control Panels | LED Display Drivers |
|---|---|
Use Scenario: Driving 7-segment displays, status indicators, and panel-mounted lamps in PLC I/O modules and HMI enclosures. IC Role / Device Role / Timing Role: Open-collector buffer translating 5 V TTL logic to 12–24 V LED supply rails while sinking current directly. Use Value: Eliminates need for discrete transistors or dedicated LED drivers; simplifies BOM and improves reliability via integrated 30 V tolerance. |
Use Scenario: Multiplexed common-anode LED matrix control in instrumentation dashboards and test equipment front panels. IC Role / Device Role / Timing Role: Sink-driver for column selection lines, synchronized with row scanning controllers to manage brightness and ghosting. Use Value: 40 mA per channel supports full-brightness segments; 14 ns delay ensures clean multiplex timing alignment. |
| Legacy Bus Interface Adapters | Relay and Solenoid Drivers |
Use Scenario: Interfacing microcontroller GPIOs to legacy parallel buses (e.g., ISA, GPIB) requiring active-low strobes and 5–12 V signaling. IC Role / Device Role / Timing Role: Level-translating buffer enabling 3.3 V or 5 V MCU outputs to drive higher-voltage bus control lines. Use Value: 30 V output rating accommodates bus termination voltages; open-collector topology supports wired-AND arbitration. |
Use Scenario: Direct actuation of 5–24 V DC relays and small solenoids in HVAC controllers and automated test fixtures. IC Role / Device Role / Timing Role: High-current sink switch replacing discrete NPN/MOSFET drivers for compact, low-component-count designs. Use Value: 40 mA rating matches typical relay coil hold currents; built-in input clamping protects against inductive kickback-induced noise. |
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 |
|---|---|---|---|
| SN7407N | Same logic function and specs, but in 14-pin PDIP package (19.30 mm × 6.35 mm); higher thermal resistance (RθJA = 52.1°C/W vs 86.8°C/W for SOIC) | Better suited for prototyping, through-hole assembly, or high-reliability industrial boards where lead pitch and hand-solderability matter | Select SN7407N when manual assembly, socketing, or legacy PCB footprint compatibility is required |
| SN7406D | Identical SOIC-14 package and pinout, but rated for 30 V output and 40 mA sink like SN7407D; differs only in input threshold (VIL = 0.8 V, VIH = 2 V - same as SN7407D) | No functional difference in most designs; SN7406D is functionally identical and often used interchangeably in new designs | SN7406D offers identical performance and drop-in replacement capability - verify marking and ordering code before substitution |
Compared with SN7407N and SN7406D, the SN7407D provides optimal surface-mount integration for space-constrained commercial designs, while maintaining full electrical equivalence to SN7406D and offering superior thermal performance over PDIP in high-density layouts.
Availability
SN7407D is available at Aetrix Electronics and suitable for industrial control panels, LED display drivers, legacy bus interface adapters, and relay/solenoid driver circuits requiring stable component supply and long-term obsolescence management.
Supply support for SN7407D 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 ICs, with decades of heritage in industry-standard TTL and CMOS logic families.
The SN7407D belongs to TI's legacy 74xx logic portfolio, engineered for robust level translation and high-current interfacing in commercial-grade industrial and consumer electronics applications.
FAQ
What is the maximum output voltage rating for SN7407D?
The SN7407D has a guaranteed minimum output breakdown voltage of 30 V, meaning it can safely sink current while its output is pulled up to 30 V. This makes it suitable for driving higher-voltage peripherals such as 24 V indicator lamps or MOS gate drivers without external protection components. The SN7407D datasheet confirms this rating under Absolute Maximum Ratings and Recommended Operating Conditions.
Does SN7407D require external pull-up resistors on its outputs?
Yes, SN7407D requires external pull-up resistors on all six open-collector outputs (pins 2, 4, 6, 8, 10, 12) to establish a defined logic-high voltage level. Without pull-ups, outputs remain in high-impedance (open) state when inactive. Typical values range from 1 kΩ to 10 kΩ depending on load current and rise-time requirements. This behavior is inherent to the SN7407D's open-collector architecture.
Can SN7407D be used as a direct replacement for SN7406D?
Yes, SN7407D and SN7406D share identical SOIC-14 packaging, pinout, electrical specifications (30 V output, 40 mA sink, TTL-compatible inputs), and functional truth table. They differ only in part numbering convention and minor historical qualification - both are fully interchangeable in new and legacy designs where SN7407D is specified.
What is the operating temperature range for SN7407D?
The SN7407D is rated for commercial operation from 0°C to 70°C ambient temperature. This range is explicitly defined in the Recommended Operating Conditions table of the SN7407D datasheet and applies to all SOIC-packaged variants including SN7407DR, SN7407DRG4, and SN7407D. It is not rated for extended or military temperature ranges.
How many independent buffer channels does SN7407D provide?
The SN7407D integrates six independent non-inverting open-collector buffer channels (1A→1Y, 2A→2Y, ..., 6A→6Y), each with identical electrical characteristics. This hex configuration allows simultaneous level translation or current sinking across multiple signals - for example, driving six separate LED anodes or controlling six relay coils from a single compact IC.
SN7407D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 7400
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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
SN7407D FAQ
1.How can I place an order for SN7407D through Aetrix?
Please submit a Request for Quotation (RFQ) for SN7407D 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 SN7407D reliable?
The price and inventory of SN7407D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN7407D is usually 5 days.
3.What payment methods are accepted for SN7407D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN7407D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN7407D?
SN7407D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN7407D 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 SN7407D?
For technical support, including SN7407D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN7407D requirements.
6.How does Aetrix verify that SN7407D is sourced from the original manufacturer or authorized distributors?
All SN7407D 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 SN7407D meets industry standards.
7.What is the process for return or replacement of SN7407D?
All SN7407D units undergo pre-shipment inspection (PSI). If there is an issue with SN7407D, 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 SN7407D part is unused and in its original packaging.
Return procedure for SN7407D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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