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Texas Instruments SN74LS07N
- Part No.:
- SN74LS07N
- Manufacturer:
- Texas Instruments
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74LS07N.pdf
- Description:
- IC BUF NON-INVERT 5.25V 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:590
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Product details
Overview
SN74LS07N from Texas Instruments is a hex buffer/driver IC with six independent open-collector outputs, designed for level translation between TTL and higher-voltage circuits (up to 30 V), delivering up to 40 mA sink current per channel, and operating at 5 V supply with 12 ns typical propagation delay. It is used in legacy industrial control I/O interfacing and relay/LED driver stages.
For engineers reviewing the SN74LS07N datasheet, SN74LS07N pinout, SN74LS07N application, or SN74LS07N equivalent, key selection criteria include open-collector output voltage rating (30 V), sink-current capability (40 mA), TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V), operating temperature range (0°C to 70°C), and PDIP-14 package compatibility with through-hole prototyping and legacy board repair.
Technical Context
The SN74LS07N implements six identical open-collector buffer stages with diode-clamped inputs to suppress transmission-line ringing and simplify termination. Each output operates as a grounded switch capable of sinking up to 40 mA while tolerating up to 30 V on the collector side - enabling direct drive of relays, lamps, and MOS logic without external pull-ups.
Its TTL-compatible inputs accept 5.25 V maximum, allowing safe interfacing with 3.3 V LVTTL and 5 V CMOS sources. The device lacks internal pull-up resistors and requires external pull-up networks on all outputs to define high-level logic states - a defining architectural constraint for wired-OR and active-low logic implementations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | Open-collector: requires external pull-up; enables wired-AND/OR logic and high-voltage load switching |
| Max Output Voltage | 30 V: supports direct interface to 24 V industrial controls, solenoids, and indicator lamps |
| Sink Current per Output | 40 mA: sufficient to drive LEDs, small relays, and TTL inputs without buffering |
| Propagation Delay | 12 ns typical: ensures timing compatibility with standard LS-TTL system clocks and control buses |
| Supply Voltage | 4.75–5.25 V: tight 5 V tolerance prevents malfunction in noisy power environments |
| Input Voltage Range | 0–5.25 V: allows safe connection to 3.3 V and 5 V logic families without level shifters |
| Operating Temperature | 0°C to 70°C: rated for commercial-grade embedded systems and consumer electronics |
Pinout & Package
SN74LS07N is housed in a 14-pin plastic dual in-line package (PDIP) with 19.30 mm × 6.35 mm body size and 2.54 mm lead pitch, suitable for through-hole mounting and breadboard evaluation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 (1A–6A) | Input | TTL-compatible digital 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 only; requires external pull-up resistor to define logic HIGH state |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry |
| 14 | VCC | +5 V supply pin; requires local 0.1 µF bypass capacitor for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage open-collector outputs | Enables direct 30 V load switching without external transistors or drivers |
| Input clamping diodes | Suppresses overshoot/ringing on long traces, reducing need for external termination |
| 40 mA sink capability per channel | Drives multiple TTL inputs or medium-power indicators without external amplification |
| 5.25 V input overvoltage tolerance | Permits safe interconnection with 3.3 V LVTTL and mixed-voltage system backplanes |
| Wired-logic compatibility | Supports active-low wired-OR and active-high wired-AND configurations via shared pull-up |
Applications
| Industrial Relay Control | Legacy System I/O Expansion |
|---|---|
Use Scenario: Driving electromechanical relays in programmable logic controller (PLC) output modules where 24 V DC loads require robust current sinking. IC Role / Device Role / Timing Role: SN74LS07N acts as a level-translating buffer stage, converting 5 V TTL logic signals into 24 V switched outputs with galvanic isolation via relay coil. Use Value: Eliminates need for discrete transistor arrays by providing 40 mA per channel at 30 V, simplifying BOM and PCB layout in space-constrained DIN-rail modules. | Use Scenario: Adding parallel port or status LED outputs to vintage microcontroller-based test equipment using 5 V TTL signaling. IC Role / Device Role / Timing Role: SN74LS07N serves as an output expander, buffering MCU GPIO pins to drive multiple LEDs or optocouplers with consistent timing (12 ns delay). Use Value: Enables reliable visual feedback and isolation without timing skew or signal degradation across six independent channels. |
| Audio Equipment Power Sequencing | Automated Test Fixture Interface |
Use Scenario: Controlling power-on sequencing of analog amplifier stages in AV receivers, where staggered 12 V/24 V rail enable signals are generated from a 5 V controller. IC Role / Device Role / Timing Role: SN74LS07N functions as a sequenced enable driver, sinking current to activate P-channel MOSFET gate drivers with precise turn-on timing. Use Value: Provides deterministic 12 ns propagation delay and 30 V output rating, ensuring clean power-up transitions without cross-conduction in multi-rail audio subsystems. | Use Scenario: Interfacing automated test equipment (ATE) with DUTs requiring TTL-level stimulus and 24 V actuation signals for solenoid-based fixture locking. IC Role / Device Role / Timing Role: SN74LS07N serves as a bidirectional level translator and load driver, accepting 5 V pattern generator outputs and driving 24 V fixture actuators. Use Value: Delivers 40 mA sink current per channel with 30 V tolerance, eliminating external driver ICs and reducing fixture wiring complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buffer/driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS37N | Quad NAND buffer with open-collector outputs; same 30 V/40 mA rating but different logic function (inverting) | Requires logic inversion in signal path; not drop-in for non-inverting buffer use cases | Select only when NAND logic functionality is required alongside open-collector drive |
| SN7407N | Identical pinout and electrical specs (30 V, 40 mA, PDIP-14); differs only in process generation (standard TTL vs. LS-TTL) | Higher power consumption (ICCL = 60 mA vs. 45 mA) and slower propagation (20 ns vs. 12 ns) | Use SN7407N only if LS-speed is not required and legacy stock availability dictates substitution |
Compared with SN74LS07N, SN74LS37N provides functional divergence (inverting logic), while SN7407N offers identical topology but degraded speed and efficiency - making SN74LS07N the optimal choice for timing-critical, low-power open-collector buffering in commercial-temperature environments.
Availability
SN74LS07N is available at Aetrix Electronics and suitable for industrial control I/O expansion, legacy system repair, and audio equipment power sequencing requiring stable component supply and long-term obsolescence management.
Supply support for SN74LS07N 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and consumer markets.
The SN74LS07N belongs to TI's legacy 74LS logic family, engineered for reliable TTL-to-high-voltage interfacing in commercial-temperature applications where robustness, predictable timing, and through-hole serviceability are prioritized over ultra-low power or high-speed performance.
FAQ
What is the maximum output voltage rating for the SN74LS07N?
The SN74LS07N has a maximum output voltage rating of 30 V, meaning each open-collector output can safely withstand up to 30 V when in the OFF (high-impedance) state. This allows direct connection to 24 V industrial control circuits and relay coils without additional protection components. Exceeding this voltage risks permanent damage to the output transistor structure.
Can the SN74LS07N drive multiple TTL inputs simultaneously?
Yes, the SN74LS07N can drive multiple TTL inputs simultaneously due to its 40 mA sink-current capability per output and TTL-compatible input thresholds. With typical TTL input current of –1.6 mA per gate, a single SN74LS07N output can reliably drive up to 25 standard TTL loads while maintaining valid logic LOW levels below 0.4 V.
Is an external pull-up resistor required for SN74LS07N operation?
Yes, an external pull-up resistor is mandatory for SN74LS07N operation because all six outputs are open-collector. Without a pull-up, outputs remain floating in the HIGH state and cannot assert a defined logic level. Typical values range from 1 kΩ (for fast rise times with heavy loads) to 10 kΩ (for low-power applications), selected based on load capacitance and required switching speed.
Does the SN74LS07N support 3.3 V logic inputs?
Yes, the SN74LS07N supports 3.3 V logic inputs because its inputs are overvoltage-tolerant up to 5.25 V and have a guaranteed VIH threshold of 2.0 V. A 3.3 V logic HIGH signal exceeds this threshold and will reliably register as a logic HIGH, making the SN74LS07N suitable for mixed-voltage system interfacing without level-shifting circuitry.
What is the thermal resistance (RθJA) of the SN74LS07N in its PDIP package?
The SN74LS07N in the PDIP-14 package has a junction-to-ambient thermal resistance (RθJA) of 50.2°C/W, as specified in the official Texas Instruments datasheet. This value assumes standard JEDEC test conditions (single-layer board, no airflow) and indicates that under 45 mA total supply current (ICCL), the die temperature rise above ambient will be approximately 2.3°C - well within safe operating limits at 70°C ambient.
SN74LS07N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LS
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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:
- Through Hole
- Supplier Device Package:
- 14-PDIP
SN74LS07N FAQ
1.How can I place an order for SN74LS07N through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LS07N 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 SN74LS07N reliable?
The price and inventory of SN74LS07N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LS07N is usually 5 days.
3.What payment methods are accepted for SN74LS07N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LS07N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LS07N?
SN74LS07N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LS07N 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 SN74LS07N?
For technical support, including SN74LS07N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LS07N requirements.
6.How does Aetrix verify that SN74LS07N is sourced from the original manufacturer or authorized distributors?
All SN74LS07N 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 SN74LS07N meets industry standards.
7.What is the process for return or replacement of SN74LS07N?
All SN74LS07N units undergo pre-shipment inspection (PSI). If there is an issue with SN74LS07N, 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 SN74LS07N part is unused and in its original packaging.
Return procedure for SN74LS07N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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