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Texas Instruments SN74LS07DRE4
- Part No.:
- SN74LS07DRE4
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74LS07DRE4.pdf
- Description:
- IC BUF NON-INVERT 5.25V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:10,717
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Product details
Overview
SN74LS07DRE4 from Texas Instruments is a hex buffer/driver IC with six independent open-collector outputs, rated for 30 V sink voltage and 40 mA per output, used for level translation (TTL-to-MOS), relay/LED driving, and wired-OR logic in industrial control and legacy digital systems.
For engineers reviewing the SN74LS07DRE4 datasheet, SN74LS07DRE4 pinout, SN74LS07DRE4 application, or SN74LS07DRE4 equivalent, key selection criteria include open-collector output voltage tolerance (30 V), sink current capability (40 mA), TTL-compatible inputs, propagation delay (12 ns typical), and SOIC-14 package compatibility with legacy board layouts.
Technical Context
The SN74LS07DRE4 implements six identical non-inverting buffer stages, each with an open-collector NPN output stage enabling high-voltage sinking up to 30 V and direct interface to external pull-up networks. Inputs accept 5.25 V maximum, supporting mixed-voltage system interfacing.
Its logic function is active-high input → active-low open-collector output: low input drives output low (sinking), high input places output in high-impedance state. No internal pull-ups exist - external resistors define logic-high level and current limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | Open-collector - requires external pull-up; enables wired-AND/OR, high-voltage interfacing, and multi-driver bus sharing. |
| Max Output Voltage | 30 V - supports direct drive of relays, lamps, and 24 V logic rails without level-shifting circuitry. |
| Sink Current per Output | 40 mA - sufficient to drive LEDs, small solenoids, or multiple TTL inputs simultaneously. |
| Propagation Delay | 12 ns typical - ensures timing compatibility with standard LS-TTL systems operating at ≤30 MHz. |
| Input Voltage Tolerance | 5.25 V max - allows safe interfacing with 3.3 V and 5 V logic families without clamping diode stress. |
| Supply Voltage Range | 4.75–5.25 V - tightly regulated 5 V operation required; not tolerant of wide-input or unregulated supplies. |
| Operating Temperature | 0 °C to +70 °C - commercial-grade rating suitable for indoor embedded equipment, not extended industrial or automotive. |
Pinout & Package
SN74LS07DRE4 is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package measuring 8.65 mm × 3.90 mm, with 1.27 mm lead pitch and 1.75 mm max height. It is RoHS-compliant, lead-finished with NiPdAu, and rated MSL Level-1 (unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 (1A–6A) | Input | Active-high TTL-compatible inputs; must be tied to VCC or GND if unused to prevent floating states. |
| 2, 4, 6, 8, 10, 12 (1Y–6Y) | Open-collector Output | Sinks current when low; high-impedance when high - requires external pull-up resistor for logic-high assertion. |
| 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. |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage open-collector outputs | Supports 30 V external pull-up - eliminates need for discrete transistors when driving 12–24 V loads. |
| Input clamping diodes | Minimizes transmission-line reflections and ESD-induced ringing on long traces or unterminated lines. |
| TTL-to-MOS level translation | Accepts 5 V TTL inputs while sinking into 30 V rails - bridges legacy logic and higher-voltage peripheral circuits. |
| Wired-logic capability | Multiple outputs can share one pull-up resistor to implement active-low AND (wired-AND) or OR (wired-OR) functions. |
| Diode-clamped inputs | Reduces susceptibility to ground bounce and signal integrity issues in noisy industrial environments. |
Applications
| Industrial Relay Control | Legacy System Bus Interface |
|---|---|
|
Use Scenario: Driving 24 V DC relays in programmable logic controller (PLC) I/O modules where microcontroller GPIOs lack sufficient voltage/current drive. IC Role / Device Role / Timing Role: Buffer and level translator - isolates low-voltage logic from inductive relay coils while providing robust sink capability. Use Value: Eliminates need for discrete NPN transistors and base resistors; simplifies BOM and layout while maintaining LS-TTL timing compatibility. |
Use Scenario: Interfacing 5 V microcontrollers to older 12 V or 24 V backplane buses in test equipment or telecom line cards. IC Role / Device Role / Timing Role: Voltage-level shifter and bus driver - translates logic states while sustaining bus loading and noise immunity. Use Value: Enables drop-in integration into existing LS-TTL designs without redesigning power domains or adding isolation components. |
| LED Indicator Array | Mixed-Voltage Logic Glue |
|
Use Scenario: Driving multi-color status LEDs on network switch front panels where each LED requires ~20 mA at 5–12 V. IC Role / Device Role / Timing Role: High-current sink driver - provides consistent brightness across channels with single-resistor current setting. Use Value: Delivers 40 mA per channel without thermal derating at room temperature, reducing component count versus discrete FET solutions. |
Use Scenario: Connecting 3.3 V FPGA I/O banks to 5 V legacy peripherals (e.g., EEPROMs, DACs) in avionics data acquisition units. IC Role / Device Role / Timing Role: Bidirectional voltage translator (input-tolerant, output-sinking) - accepts 3.3 V logic while driving 5 V loads. Use Value: Input overvoltage tolerance (5.25 V) prevents damage from 5 V signals; open-collector outputs avoid contention during hot-swap or reset sequences. |
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 |
|---|---|---|---|
| SN74LS06DRE4 | Same pinout and electrical specs, but rated for 30 V output with 40 mA sink - identical functionality; differs only in internal input clamp structure (LS06 has no input clamps). | LS06 lacks input clamping diodes - less robust against transmission-line effects and ESD on long traces. | Select SN74LS07DRE4 when driving unterminated lines or operating in electrically noisy environments; choose LS06 only if clamping is unnecessary and cost is critical. |
| SN74HCT07DR | CMOS version with 5 V supply, TTL-compatible inputs, 6 V max output voltage, and 4 mA sink current - lower drive strength and voltage range. | Not suitable for 12–24 V loads; limited to 5 V logic-level interfacing and low-current indicators. | Choose SN74HCT07DR only for modern 5 V-only systems requiring lower power and faster edge rates; SN74LS07DRE4 remains necessary for high-voltage sinking. |
Compared with SN74LS06DRE4, SN74LS07DRE4 adds input clamping for improved signal integrity; compared with SN74HCT07DR, it delivers 10× higher sink current and 5× higher output voltage - making it irreplaceable for industrial load-driving applications.
Availability
SN74LS07DRE4 is available at Aetrix Electronics and suitable for industrial control, legacy system repair, and embedded instrumentation requiring stable component supply and long-term obsolescence management.
Supply support for SN74LS07DRE4 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74LS07DRE4 belongs to TI's legacy LS-TTL logic family, designed specifically for robust level translation and high-current sinking in industrial automation, test equipment, and retrofitted digital systems.
FAQ
What is the maximum output voltage rating for SN74LS07DRE4?
The SN74LS07DRE4 is rated for a maximum output voltage of 30 V when the output transistor is in the off (high-impedance) state. This allows safe interfacing with 12 V, 24 V, and other higher-voltage circuits using external pull-up resistors - a key differentiator from standard TTL buffers.
Can SN74LS07DRE4 drive multiple TTL inputs directly?
Yes, SN74LS07DRE4 can drive multiple TTL inputs directly due to its 40 mA sink current capability per output. At typical TTL input current (≈1.6 mA per gate), one SN74LS07DRE4 output can reliably drive up to 20+ standard 74LS inputs without exceeding its rated current limit.
Is SN74LS07DRE4 compatible with 3.3 V microcontroller outputs?
Yes, SN74LS07DRE4 inputs are 5.25 V tolerant and recognize 3.3 V as a valid high-level input (VIH = 2 V min). A 3.3 V GPIO can directly drive SN74LS07DRE4 inputs without level shifting - making it suitable for interfacing modern controllers with legacy high-voltage peripherals.
Does SN74LS07DRE4 require external pull-up resistors on its outputs?
Yes, SN74LS07DRE4 outputs are open-collector and inherently cannot source current. Each output must be connected to an external pull-up resistor tied to the desired logic-high voltage rail (e.g., 5 V, 12 V, or 24 V) to establish defined high-state voltage levels.
What is the thermal resistance (RθJA) of SN74LS07DRE4 in its SOIC package?
The SN74LS07DRE4 in SOIC-14 (D package) has a junction-to-ambient thermal resistance (RθJA) of 85.2 °C/W under standard JEDEC PCB mounting conditions. This value assumes a two-layer board with 1 in² copper pour; actual performance improves with enhanced copper area or airflow.
SN74LS07DRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LS
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
SN74LS07DRE4 FAQ
1.How can I place an order for SN74LS07DRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LS07DRE4 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 SN74LS07DRE4 reliable?
The price and inventory of SN74LS07DRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LS07DRE4 is usually 5 days.
3.What payment methods are accepted for SN74LS07DRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LS07DRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LS07DRE4?
SN74LS07DRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LS07DRE4 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 SN74LS07DRE4?
For technical support, including SN74LS07DRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LS07DRE4 requirements.
6.How does Aetrix verify that SN74LS07DRE4 is sourced from the original manufacturer or authorized distributors?
All SN74LS07DRE4 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 SN74LS07DRE4 meets industry standards.
7.What is the process for return or replacement of SN74LS07DRE4?
All SN74LS07DRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LS07DRE4, 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 SN74LS07DRE4 part is unused and in its original packaging.
Return procedure for SN74LS07DRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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