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onsemi SN74LS30D
- Part No.:
- SN74LS30D
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74LS30D.pdf
- Description:
- IC GATE NAND 1CH 8-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:13,041
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Product details
Overview
SN74LS30D from Texas Instruments is a TTL 8-input NAND gate IC in SOIC-14 package, operating from 4.75 V to 5.25 V supply, with typical propagation delay of 15 ns and output drive capability of ±8 mA at VOH/VOL. It implements standard positive-logic NAND functionality for combinational logic design in industrial control panels and legacy digital instrumentation.
For engineers reviewing the SN74LS30D datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, validated SOIC-14 pin mapping, confirmed logic function behavior, and two technically documented alternative parts for direct functional substitution in 74LS-family designs.
Technical Context
The SN74LS30D implements a single 8-input NAND gate using bipolar Schottky-clamped transistor-transistor logic (TTL), delivering standardized noise margins (VIH = 2.0 V min, VIL = 0.8 V max) and guaranteed fan-out of 20 LS-TTL loads. Its internal structure includes input clamping diodes, multi-emitter input transistors, and active pull-up/pull-down output stages.
Designed for compatibility with the 74LS logic family, the SN74LS30D supports wired-AND expansion via open-collector-compatible outputs when used with external pull-ups, and maintains stable DC switching thresholds across its 0°C to 70°C commercial temperature range without requiring external biasing or termination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Single 8-input NAND gate - performs Boolean Y = NOT(A·B·C·D·E·F·G·H); enables compact implementation of multi-input decision logic without cascading gates. |
| Supply Voltage | 4.75 V to 5.25 V - requires regulated +5 V rail; operation outside this range risks invalid logic states or device damage. |
| Propagation Delay | 15 ns typical (VCC = 5 V, TA = 25°C) - determines maximum clock frequency in synchronous combinatorial paths (e.g., ≤33 MHz for single-stage timing). |
| Output Drive | ±8 mA (IOH/IOL) - supports direct interface to up to 20 LS-TTL inputs or LED indicators with series resistor ≥390 Ω. |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - ensures robust noise immunity against EMI-induced glitches on control lines in industrial environments. |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded systems including test equipment, PLC I/O modules, and lab instrumentation. |
Pinout & Package
SN74LS30D uses a 14-pin Small Outline Integrated Circuit (SOIC) package (Package Code D), 3.9 mm body width, 1.75 mm max height, 1.27 mm lead pitch, and gull-wing surface-mount terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 9, 10, 12, 13 | NAND Input | Eight logic inputs accepting standard TTL voltage levels; internally tied to multi-emitter transistor base; all must be HIGH for LOW output. |
| 6 | Ground (GND) | Reference return path for all internal currents and output sinks; must be connected to system 0 V plane with low-inductance trace. |
| 8 | Power (VCC) | +5 V supply connection; requires local 0.1 µF ceramic decoupling capacitor placed within 5 mm of pin. |
| 11 | NAND Output | Active-low TTL output stage capable of sourcing 0.4 mA or sinking 8 mA; compatible with LS, S, and standard TTL loads. |
Key Features
| Feature | Design Value |
|---|---|
| Standardized 74LS Family Interface | Guaranteed AC/DC compatibility with SN74LS00, SN74LS04, and other LS-series devices - eliminates level-shifting in mixed-gate logic designs. |
| High Fan-Out Capability | Drives up to 20 LS-TTL inputs directly - reduces need for buffer stages in bus arbitration or enable-tree circuits. |
| Input Clamp Diodes | Integrated protection against negative transients up to –1.2 V - suppresses ESD-induced latch-up during board handling or signal coupling. |
| Low Power Consumption | Typical 19 mW per gate at 5 V - enables dense logic layouts in thermally constrained enclosures without forced air cooling. |
Applications
| Industrial Control Logic | Legacy Test Equipment |
|---|---|
|
Use Scenario: Decoding 8-bit address bus lines to select peripheral registers in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Acts as address-enable gate enabling memory-mapped I/O access only when full 8-bit address matches target register. Use Value: Reduces component count versus discrete 2-input NAND cascades, minimizing propagation skew and PCB area in fixed-function control boards. |
Use Scenario: Generating pass/fail strobe signals in automated calibration testers for analog multimeters. IC Role / Device Role / Timing Role: Combines eight independent sensor readiness flags into one composite "all-ready" signal before initiating measurement sequence. Use Value: Ensures synchronized acquisition by preventing test execution until all subsystems report valid status, improving repeatability. |
| Digital Panel Meters | Lab Instrumentation Interfaces |
|
Use Scenario: Enabling digit display segments only when corresponding BCD input and decimal point selection are both asserted. IC Role / Device Role / Timing Role: Functions as segment-enable arbiter in multiplexed 7-segment driver architecture. Use Value: Eliminates ghosting artifacts by guaranteeing exclusive activation of selected digits, critical for readability in high-vibration environments. |
Use Scenario: Validating handshake signals between GPIB controller and legacy oscilloscope modules during remote command execution. IC Role / Device Role / Timing Role: Validates simultaneous presence of ATN, NDAC, and DAV lines to confirm GPIB bus readiness before data transfer. Use Value: Prevents command corruption by enforcing strict protocol compliance at hardware level, reducing firmware error-handling overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-input NAND gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS30N | Same logic function and DC specs, but in PDIP-14 package with 25-unit tube packaging and 0°C–70°C rating. | Preferred for through-hole prototyping, breadboarding, or repair of legacy DIP-based systems where SOIC rework is impractical. | Select SN74LS30N when manual assembly, field repair, or socket-based testing is required; not suitable for automated SMT production. |
| SN74LS30DR | Identical electrical specifications and SOIC-14 footprint, but supplied in 2500-unit tape-and-reel format with RoHS-compliant NiPdAu finish. | Optimized for high-volume SMT manufacturing with J-STD-020 Level-1 moisture sensitivity and standard reel dimensions. | Choose SN74LS30DR for production runs requiring automated pick-and-place placement and IPC-compliant reflow profiles. |
Compared with SN74LS30D, SN74LS30N offers mechanical compatibility with legacy DIP sockets but lacks SMT process support, while SN74LS30DR provides identical performance with enhanced manufacturability for modern assembly lines - neither requires schematic or layout changes when substituting within the same 74LS logic family context.
Availability
SN74LS30D is available at Aetrix Electronics and suitable for industrial control logic, legacy test equipment, digital panel meters, and lab instrumentation interfaces requiring stable component supply and long-term obsolescence management.
Supply support for SN74LS30D 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 and embedded processing technologies with over 90 years of innovation in logic, power management, and signal chain solutions.
The SN74LS30D belongs to TI's 74LS TTL logic product line, designed specifically for reliable, low-power, medium-speed digital control functions in commercial-grade industrial and instrumentation applications.
FAQ
What logic function does the SN74LS30D implement?
The SN74LS30D implements a single 8-input NAND gate with standard TTL electrical characteristics. Its output is LOW only when all eight inputs are HIGH; otherwise, the output remains HIGH. This function is defined in the TI SDLS099 datasheet and verified across the full 0°C to 70°C operating range. The SN74LS30D is not configurable and performs this fixed Boolean operation without external programming or biasing.
Is the SN74LS30D pin-compatible with other 74LS-series NAND gates?
No - the SN74LS30D is not pin-compatible with smaller-input NAND gates like SN74LS00 (dual 2-input) or SN74LS10 (triple 3-input), due to differing pin assignments and internal gate counts. Its 14-pin SOIC layout dedicates pins 1, 2, 4, 5, 9, 10, 12, and 13 exclusively to inputs, with only pin 11 as output. Substitution requires schematic and layout revision. The SN74LS30D pinout is unique to 8-input NAND devices in the 74LS family.
What is the maximum recommended operating frequency for the SN74LS30D?
The SN74LS30D does not specify a maximum clock frequency because it is a combinational logic device without internal clocking. Its usable speed is governed by propagation delay: 15 ns typical (22 ns max) from any input to output. In practice, this supports reliable operation in asynchronous logic paths up to approximately 33 MHz for single-stage use, assuming clean edges and proper termination. System-level timing must account for worst-case delays across temperature and voltage extremes.
Can the SN74LS30D drive LEDs directly?
Yes - the SN74LS30D can drive standard 2 mA LEDs directly when configured in active-low mode (LED anode to VCC, cathode to SN74LS30D output). With IOL = 8 mA minimum, a 390 Ω current-limiting resistor ensures ~12 mA peak drive at 5 V, well within spec. For higher brightness or multiple LEDs, external transistor buffering is recommended to avoid exceeding total package power dissipation limits.
Does the SN74LS30D support mixed-voltage interfacing with 3.3 V logic?
No - the SN74LS30D is strictly a 5 V TTL device with VIH = 2.0 V minimum and VIL = 0.8 V maximum, making it incompatible with direct connection to 3.3 V CMOS outputs without level translation. Driving SN74LS30D inputs from 3.3 V logic may result in marginal or invalid HIGH recognition. Interfacing requires either a TTL-compatible 3.3 V buffer (e.g., SN74LVC1G00) or resistive divider + Schottky clamp network validated per TI application note SCBA005.
SN74LS30D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LS
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SN74LS30D FAQ
1.How can I place an order for SN74LS30D through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LS30D 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 SN74LS30D reliable?
The price and inventory of SN74LS30D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LS30D is usually 5 days.
3.What payment methods are accepted for SN74LS30D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LS30D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LS30D?
SN74LS30D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LS30D 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 SN74LS30D?
For technical support, including SN74LS30D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LS30D requirements.
6.How does Aetrix verify that SN74LS30D is sourced from the original manufacturer or authorized distributors?
All SN74LS30D 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 SN74LS30D meets industry standards.
7.What is the process for return or replacement of SN74LS30D?
All SN74LS30D units undergo pre-shipment inspection (PSI). If there is an issue with SN74LS30D, 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 SN74LS30D part is unused and in its original packaging.
Return procedure for SN74LS30D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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