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onsemi SN74LS30N
- Part No.:
- SN74LS30N
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74LS30N.pdf
- Description:
- IC GATE NAND 1CH 8-INP 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:8,785
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Product details
Overview
SN74LS30N from Texas Instruments is a TTL 8-input NAND gate IC in a 14-pin PDIP package, operating from 4.75 V to 5.25 V with typical propagation delay of 15 ns and output drive capability of −0.4 mA (high) / 8 mA (low), used in digital logic control, address decoding, and bus arbitration circuits.
For engineers reviewing the SN74LS30N datasheet, pinout, applications, or equivalent options, this page delivers verified functional identity, confirmed DC/AC electrical specs, validated 14-pin DIP pin assignment, temperature range (0°C to 70°C), RoHS-compliant NIPDAU lead finish, and two field-validated alternative part numbers for legacy TTL system design and replacement.
Technical Context
The SN74LS30N implements a single 8-input NAND logic function using low-power Schottky (LS) bipolar transistor technology. Its inputs are TTL-compatible with VIH = 2.0 V min and VIL = 0.8 V max, and it features standard open-collector–compatible output structure with guaranteed VOH = 2.7 V min at VCC = 5 V and IOH = −0.4 mA.
Designed for direct interfacing with other 74LS-series devices, the SN74LS30N supports fan-out of 20 LS-TTL loads and exhibits typical power dissipation of 19 mW per gate at 5 V, with input clamp diodes enabling robust noise immunity and transient protection in industrial control backplanes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74LS (Low-Power Schottky TTL) |
| Function | Single 8-input NAND gate - performs Boolean Y = NOT(A·B·C·D·E·F·G·H) |
| VCC Range | 4.75 V to 5.25 V - requires tightly regulated +5 V supply for stable TTL-level operation |
| tpd (Typ) | 15 ns - determines maximum clock/data rate in synchronous logic chains (e.g., ≤33 MHz toggle) |
| IOL / IOH | 8 mA / −0.4 mA - drives up to 20 LS-TTL inputs or directly interfaces with LEDs, relays, or small-signal transistors |
| Operating Temp | 0°C to 70°C - qualified for commercial-grade embedded systems and instrumentation applications |
| Package | PDIP-14 (N) - through-hole mounting compatible with legacy PCBs and manual prototyping |
Pinout & Package
SN74LS30N is housed in a 14-pin plastic dual in-line package (PDIP-N) with 0.3-inch body width, 0.1-inch lead pitch, and 0.1-inch row spacing. Pin 1 is located at the top-left corner adjacent to the notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8 | Inputs A–H | Active-high TTL-compatible inputs; each accepts 0.8 V max low, 2.0 V min high |
| 9 | Output Y | Active-low NAND output; sinks up to 8 mA, sources −0.4 mA into pull-up |
| 14 | VCC | +5 V supply pin - must be decoupled locally with 0.1 µF ceramic capacitor |
| 7 | GND | Ground reference - connects to system common return path for noise control |
Key Features
| Feature | Design Value |
|---|---|
| 8-input NAND integration | Reduces board space vs. cascading dual 4-input NANDs; eliminates inter-stage propagation delay |
| LS-TTL compatibility | Direct drop-in replacement for 74S30 or 74F30 in existing designs without level-shifting |
| Input clamp diodes | Provides ESD tolerance and negative transient suppression up to −1.2 V on any input |
| Standard 14-pin DIP footprint | Supports hand-soldering, socket-based testing, and legacy automated insertion equipment |
Applications
| Address Decoding | Bus Arbitration |
|---|---|
Use Scenario: Selecting memory or peripheral chips in microprocessor-based systems using 8-bit address lines. IC Role / Device Role / Timing Role: Enables chip-select signal generation only when all 8 address bits match a specific decode pattern. Use Value: Eliminates need for discrete resistor-diode logic or multiple smaller NAND gates, reducing component count and timing skew. | Use Scenario: Resolving contention between multiple masters sharing a common data bus in industrial controllers. IC Role / Device Role / Timing Role: Generates grant signal only when all request lines (8 total) are asserted simultaneously. Use Value: Ensures deterministic arbitration outcome with sub-15 ns decision latency, critical for real-time response. |
| Power-On Reset Logic | Test Mode Enable |
Use Scenario: Generating system-wide reset pulse after stable +5 V rail is detected across eight voltage-monitoring nodes. IC Role / Device Role / Timing Role: Acts as AND-of-inverts to assert reset until all eight monitored conditions reach valid state. Use Value: Guarantees synchronized initialization across distributed subsystems without external timing components. | Use Scenario: Activating diagnostic firmware mode when eight DIP switch settings match factory-defined test pattern. IC Role / Device Role / Timing Role: Provides secure, hardware-enforced enable signal requiring exact 8-bit configuration match. Use Value: Prevents accidental entry into test mode while supporting field-service diagnostics via physical switch bank. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-input NAND logic applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS30DR | SOIC-14 package; same electrical specs; RoHS-compliant NIPDAU finish; MSL Level-1 rating | Surface-mount assembly required; unsuitable for through-hole prototyping or socket use | Select SN74LS30DR for volume production on modern SMT lines where board space and reflow compatibility are priorities. |
| SN54LS30J | CDIP-14 package; extended temp range (−55°C to 125°C); non-RoHS SNPB lead finish; military-grade screening | Required for aerospace, defense, or downhole instrumentation where extreme environmental resilience is mandated | Choose SN54LS30J when operating outside 0°C–70°C range or when MIL-PRF-38535 compliance is contractually required. |
Compared with SN74LS30N, SN74LS30DR offers identical logic behavior in a space-saving SOIC package ideal for high-density layouts, while SN54LS30J provides enhanced thermal and reliability margins for mission-critical deployments - neither is pin-compatible without PCB redesign due to differing package footprints.
Availability
SN74LS30N is available at Aetrix Electronics and suitable for industrial control panels, legacy test equipment, and educational lab kits requiring stable component supply and long-term obsolescence management.
Supply support for SN74LS30N 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 with broad industrial, automotive, and consumer reach.
The SN74LS30N belongs to TI's classic 74LS logic family, engineered for reliable, low-power digital signal conditioning and combinatorial logic in cost-sensitive commercial systems deployed from the 1980s onward.
FAQ
What logic function does the SN74LS30N implement?
The SN74LS30N implements a single 8-input NAND gate, producing a low output only when all eight inputs are high; otherwise, the output remains high. This Boolean function - Y = NOT(A·B·C·D·E·F·G·H) - is fully specified in the TI SDLS099 datasheet and electrically verified across the 0°C to 70°C operating range. The SN74LS30N uses standard TTL input thresholds and LS-TTL output drive characteristics consistent with the broader 74LS family.
Is the SN74LS30N RoHS compliant?
Yes, the SN74LS30N is RoHS compliant, featuring a NIPDAU (nickel-palladium-gold) lead finish as documented in TI's PACKAGE OPTION ADDENDUM. It meets EU Directive 2011/65/EU requirements with no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits. The SN74LS30N replaces legacy SN74S30 and SN74F30 variants in new designs requiring environmental compliance without sacrificing electrical performance.
Can the SN74LS30N drive an LED directly?
Yes, the SN74LS30N can drive a standard 2 mA LED directly when configured in active-low mode: connect the anode to +5 V via a current-limiting resistor (e.g., 470 Ω), and the cathode to the SN74LS30N output pin (pin 9). With IOL = 8 mA guaranteed, the SN74LS30N safely sinks sufficient current for indicator use. Avoid sourcing current (high-state drive), as IOH = −0.4 mA is insufficient for most LEDs.
What is the maximum fan-out of the SN74LS30N?
The SN74LS30N supports a fan-out of 20 LS-TTL loads, meaning one output can reliably drive up to 20 inputs of other 74LS-series devices without exceeding voltage or current specifications. This value derives from the ratio of IOL (8 mA) to IIL (−0.4 mA per LS input) and is confirmed in TI's characterization data. Exceeding this limit risks marginal VOH/VOL levels and increased propagation delay in the SN74LS30N output stage.
Does the SN74LS30N have internal pull-up or pull-down resistors on its inputs?
No, the SN74LS30N does not include internal pull-up or pull-down resistors on any input. All eight inputs (pins 1–8) are TTL-compatible high-impedance nodes requiring explicit external biasing to define logic state when unused or floating. Leaving inputs unconnected may cause erratic output behavior due to noise coupling; TI recommends tying unused inputs to VCC (for logic HIGH) or GND (for logic LOW) via 1 kΩ resistors to ensure deterministic operation of the SN74LS30N.
SN74LS30N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LS
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- NAND Gate
- Number of Circuits:
- 1
- Number of Inputs:
- 8
- Features:
- -
- Voltage - Supply:
- 4.75V ~ 5.25V
- Current - Quiescent (Max):
- 500 µA
- Current - Output High, Low:
- 400µA, 8mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 20ns @ 5V, 15pF
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
SN74LS30N FAQ
1.How can I place an order for SN74LS30N through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LS30N 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 SN74LS30N reliable?
The price and inventory of SN74LS30N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LS30N is usually 5 days.
3.What payment methods are accepted for SN74LS30N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LS30N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LS30N?
SN74LS30N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LS30N 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 SN74LS30N?
For technical support, including SN74LS30N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LS30N requirements.
6.How does Aetrix verify that SN74LS30N is sourced from the original manufacturer or authorized distributors?
All SN74LS30N 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 SN74LS30N meets industry standards.
7.What is the process for return or replacement of SN74LS30N?
All SN74LS30N units undergo pre-shipment inspection (PSI). If there is an issue with SN74LS30N, 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 SN74LS30N part is unused and in its original packaging.
Return procedure for SN74LS30N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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