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Texas Instruments SN74ALS05ADG4
- Part No.:
- SN74ALS05ADG4
- Manufacturer:
- Texas Instruments
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74ALS05ADG4.pdf
- Description:
- IC INVERTER 6CH 1-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,023
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Product details
Overview
SN74ALS05ADG4 from Texas Instruments is a hex inverter IC with six independent open-collector outputs, performing Y = A logic inversion. It operates at 4.5–5.5 V supply, supports 0°C to 70°C ambient, delivers 8 mA low-level output current, and exhibits 23–54 ns propagation delay (tPLH/tPHL). It is used in bus interface circuits requiring wired-AND/wired-OR logic combining.
For engineers reviewing the SN74ALS05ADG4 datasheet, SN74ALS05ADG4 pinout, SN74ALS05ADG4 application, or SN74ALS05ADG4 equivalent, this page provides verified package mapping (SOIC-14), confirmed open-collector drive capability, absolute maximum ratings, switching characteristics, and direct alternatives for legacy TTL system upgrades.
Technical Context
This device implements six independent inverting buffers with open-collector NPN transistor outputs-no internal pull-up-requiring external resistors for logic high assertion. Its ALS (Advanced Low-Power Schottky) architecture achieves lower power than standard LS while maintaining compatible speed.
The output stage enables active-low wired-OR and active-high wired-AND configurations when multiple outputs share a common pull-up. Input thresholds are VIH ≥ 2.0 V and VIL ≤ 0.8 V, ensuring robust noise margin in mixed-logic systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Inversion (Y = A) across six independent channels |
| Output Type | Open-collector - requires external pull-up resistor for HIGH output |
| Supply Voltage Range | 4.5 V to 5.5 V - compatible with standard 5 V TTL/ALS rails |
| Operating Temperature | 0°C to 70°C - commercial-grade thermal envelope |
| Low-Level Output Current | 8 mA max - drives standard TTL loads or multiple parallel inputs |
| Propagation Delay | 23–54 ns (tPLH/tPHL @ VCC = 4.5–5.5 V, CL = 50 pF) - suitable for ≤20 MHz bus timing |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - ensures reliable recognition of LS/TTL logic levels |
Pinout & Package
SN74ALS05ADG4 is supplied in a 14-pin SOIC (Small Outline Integrated Circuit) package, 3.9 mm body width, 1.75 mm max height, 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Input (A1–A6) | Active-HIGH logic inputs accepting standard TTL voltage levels |
| 2, 4, 6, 8, 10, 12 | Output (Y1–Y6) | Open-collector NPN outputs - sink current only; require external pull-up |
| 7 | GND | Ground reference for all internal circuitry and output transistors |
| 14 | VCC | Positive supply rail (4.5–5.5 V); powers all six inverters |
Key Features
| Feature | Design Value |
|---|---|
| ALS Technology | Reduces power consumption vs. standard LS while retaining speed compatibility |
| Wired-Logic Capability | Open-collector outputs enable shared-bus wired-AND/OR without external diodes |
| High Sink Drive | 8 mA per output supports driving multiple TTL inputs or LED indicators directly |
| Input Hysteresis Margin | VIH–VIL = 1.2 V minimum ensures noise immunity in electrically noisy industrial environments |
| Legacy Pin Compatibility | Matches 7405 pinout - drop-in replacement for obsolete 7405/74LS05 in existing layouts |
Applications
| Industrial Bus Interface | LED Driver Logic |
|---|---|
Use Scenario: Driving shared address/data buses in PLC backplanes where multiple controllers arbitrate access via active-low enable lines. IC Role / Device Role / Timing Role: SN74ALS05ADG4 inverts control signals and wires outputs to implement priority-encoded bus grant logic. Use Value: Enables deterministic wired-OR arbitration without additional logic gates or timing skew from discrete diodes. |
Use Scenario: Controlling multi-segment status LEDs on panel-mounted instrumentation with common-anode configuration. IC Role / Device Role / Timing Role: SN74ALS05ADG4 sinks current from LED anodes through external resistors, providing inverted logic-level drive. Use Value: Eliminates need for discrete NPN drivers; 8 mA per channel supports bright indicator operation at 5 V. |
| Level Translation Interface | Mixed-Logic Signal Conditioning |
Use Scenario: Interfacing 3.3 V microcontroller GPIOs to 5 V legacy peripherals requiring active-low handshake signals. IC Role / Device Role / Timing Role: SN74ALS05ADG4 accepts 3.3 V logic highs (exceeding VIH = 2.0 V), inverts, and drives 5 V bus lines via open-collector pull-up. Use Value: Provides safe, passive level shifting without bidirectional translators or voltage clamps. |
Use Scenario: Cleaning up marginal CMOS-to-TTL signal transitions in aging test equipment with slow edge rates. IC Role / Device Role / Timing Role: SN74ALS05ADG4 reshapes input edges using Schottky-clamped ALS inputs and delivers clean, fast-rising inverted outputs. Use Value: Restores timing margins degraded by capacitive loading or long traces in retrofit applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex inverter with open-collector output applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS05N | Higher ICC (12 mA typical), slower tPLH (25–60 ns), same SOIC-14 pinout and open-collector structure | Less efficient power use; suitable where ALS speed not required but LS stock exists | Prefer SN74ALS05ADG4 for lower power and faster response; SN74LS05N acceptable if board layout already accommodates LS thermal profile |
| SN74HCT05DR | CMOS input (VIH = 2.0 V min, VIL = 0.8 V max), TTL-output compatible, 4 mA IOL, 5 V only, no 4.5 V min operation | Higher noise immunity, but reduced drive strength and narrower supply range | Choose SN74HCT05DR only when interfacing with high-noise digital systems; SN74ALS05ADG4 preferred for legacy TTL bus drive and wider VCC tolerance |
Compared with SN74LS05N and SN74HCT05DR, SN74ALS05ADG4 offers superior speed-power trade-off, guaranteed 4.5–5.5 V operation, and higher sink current-making it optimal for upgrading aging industrial control boards where bus loading and timing margins are critical.
Availability
SN74ALS05ADG4 is available at Aetrix Electronics and suitable for industrial automation interfaces, legacy system repairs, and LED status panel designs requiring stable component supply across extended production lifecycles.
Supply support for SN74ALS05ADG4 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 communications markets.
SN74ALS05ADG4 belongs to TI's legacy Advanced Low-Power Schottky (ALS) logic family, designed specifically for high-reliability, medium-speed TTL-compatible systems requiring low power and wired-logic flexibility.
FAQ
What is the maximum supply voltage for SN74ALS05ADG4?
The absolute maximum supply voltage for SN74ALS05ADG4 is 7 V, but the recommended operating range is strictly 4.5 V to 5.5 V. Operation above 5.5 V risks exceeding internal junction limits and may cause accelerated degradation. All electrical characteristics-including VOL, IOL, and propagation delay-are specified only within the 4.5–5.5 V window per the SDAS190A datasheet.
Does SN74ALS05ADG4 have internal pull-up resistors on its outputs?
No, SN74ALS05ADG4 does not include internal pull-up resistors. Its outputs are true open-collector NPN transistors that can only sink current. An external pull-up resistor must be connected between each output pin and VCC (or another logic-high rail) to establish a valid HIGH logic level. Typical values range from 1 kΩ to 10 kΩ depending on speed and fan-out requirements.
Can SN74ALS05ADG4 replace SN7405 in an existing PCB design?
Yes, SN74ALS05ADG4 is pin-compatible with SN7405 and SN74LS05 in SOIC-14 (D) and PDIP-14 (N) packages. It shares identical pinout, logic function, and open-collector topology. However, SN74ALS05ADG4 draws less quiescent current and switches faster-verify timing margins and ensure pull-up resistor values remain appropriate for the improved edge rates.
What is the minimum input voltage recognized as a logic HIGH by SN74ALS05ADG4?
The minimum input voltage recognized as a logic HIGH (VIH) for SN74ALS05ADG4 is 2.0 V under recommended operating conditions. This threshold is consistent across the full temperature range (0°C to 70°C) and supply range (4.5–5.5 V), providing reliable noise immunity when interfacing with standard TTL, LS, or ALS outputs.
Is SN74ALS05ADG4 RoHS compliant?
Yes, SN74ALS05ADG4 (orderable part SN74ALS05ADR) is RoHS compliant, with NiPdAu lead finish and MSL Level-1 rating. The "G4" suffix in SN74ALS05ADG4 denotes the green, lead-free, RoHS-compliant version per TI's packaging nomenclature-confirmed in the Package Option Addendum dated 15-Jul-2026.
SN74ALS05ADG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALS
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Inverter
- Number of Circuits:
- 6
- Number of Inputs:
- 1
- Features:
- Open Collector
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- -
- Current - Output High, Low:
- -, 8mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 54ns @ 5V, 50pF
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SN74ALS05ADG4 FAQ
1.How can I place an order for SN74ALS05ADG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS05ADG4 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 SN74ALS05ADG4 reliable?
The price and inventory of SN74ALS05ADG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS05ADG4 is usually 5 days.
3.What payment methods are accepted for SN74ALS05ADG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS05ADG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALS05ADG4?
SN74ALS05ADG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS05ADG4 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 SN74ALS05ADG4?
For technical support, including SN74ALS05ADG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS05ADG4 requirements.
6.How does Aetrix verify that SN74ALS05ADG4 is sourced from the original manufacturer or authorized distributors?
All SN74ALS05ADG4 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 SN74ALS05ADG4 meets industry standards.
7.What is the process for return or replacement of SN74ALS05ADG4?
All SN74ALS05ADG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS05ADG4, 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 SN74ALS05ADG4 part is unused and in its original packaging.
Return procedure for SN74ALS05ADG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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