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Texas Instruments SN74HC05DR
- Part No.:
- SN74HC05DR
- Manufacturer:
- Texas Instruments
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74HC05DR.pdf
- Description:
- IC INVERTER 6CH 1-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,685
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Product details
Overview
SN74HC05DR from Texas Instruments is a hex inverter IC with six independent open-drain outputs, operating across 2 V to 6 V supply voltage and –40°C to +125°C temperature range. It delivers 20 µA max supply current at 6 V, supports up to 10 LSTTL loads, and provides low-level output voltage of 0.26 V (typ) at 4.5 V supply with 4 mA sink current - used for wired-AND bus interfaces and LED drive in industrial control systems.
For engineers reviewing the SN74HC05DR datasheet, SN74HC05DR pinout, SN74HC05DR application, or SN74HC05DR equivalent, this page delivers verified functional identity, SOIC-14 package mapping, open-drain logic behavior, propagation delay (tPLH/tPHL ≤ 29/21 ns at 4.5 V), and real-world design implications for bus termination and level translation.
Technical Context
The SN74HC05DR implements six identical CMOS inverters, each with an open-drain output stage that sinks current to GND but cannot source current - requiring external pull-up resistors for logic-high assertion. Its standard CMOS inputs exhibit ≤10 pF capacitance and ±1 µA leakage at 6 V, enabling high fanout without excessive loading.
Functionally, it operates as Y = A̅ in positive logic, with output states defined strictly by input level: HIGH input yields LOW output (sinking), LOW input yields high-impedance (Hi-Z) output. This enables wired-AND logic, I²C-compatible bus driving, and active-low signal inversion with configurable voltage translation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2 V to 6 V - supports mixed-voltage system interfacing (e.g., 3.3 V MCU driving 5 V bus) |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood and industrial embedded environments |
| Output Sink Current | 4 mA (max) at VOL ≤ 0.26 V - sufficient to drive LEDs or standard logic inputs with external pull-up |
| Propagation Delay | tPLH/tPHL ≤ 29/21 ns at VCC = 4.5 V - enables reliable operation in sub-30 MHz digital timing paths |
| Input Capacitance | 10 pF (max) - minimizes capacitive loading on upstream drivers and preserves signal edge integrity |
| Supply Current | 20 µA (max) at VCC = 6 V - ultra-low static power ideal for battery-backed or energy-sensitive designs |
| Logic Function | Inversion with open-drain output - enables wired-AND, level shifting, and shared-bus arbitration without contention |
Pinout & Package
SN74HC05DR is housed in a 14-pin SOIC (D) package measuring 8.70 mm × 3.90 mm, RoHS-compliant, with moisture sensitivity level (MSL) 1 and lead finish NiPdAu/Sn.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A, 3A, 4A, 5A, 6A | Input | Independent logic inputs for each of six inverter channels; must be terminated to VCC or GND if unused |
| 1Y, 2Y, 3Y, 4Y, 5Y, 6Y | Open-drain Output | Sinks current when active low; floats Hi-Z when inactive - requires external pull-up for logic-high state |
| VCC | Positive Supply | Power rail connection (2–6 V); decoupling capacitor (0.1 µF) required near pin for noise suppression |
| GND | Ground Reference | Return path for all output sink current and supply current; must handle total IOL + ICC |
Key Features
| Feature | Design Value |
|---|---|
| Open-drain outputs | Enables wired-AND bus topology and voltage-level translation between non-matching logic families |
| Wide supply range (2–6 V) | Allows direct interface with 3.3 V microcontrollers and 5 V peripherals without level shifters |
| Low ICC (20 µA max) | Reduces standby power in always-on monitoring circuits and extends battery life in portable systems |
| Buffered inputs | Improves noise immunity and ensures consistent switching thresholds across process/voltage/temperature |
| –40°C to +125°C operation | Validated performance in extended-temperature industrial PLCs and automotive body control modules |
Applications
| I²C Bus Pull-Up Driver | LED Indicator Control |
|---|---|
Use Scenario: Driving SDA/SCL lines in multi-master I²C systems where multiple devices share bidirectional buses. IC Role / Device Role / Timing Role: Inverter configured as active-low driver with external pull-up; provides controlled sinking for bus arbitration and clock stretching. Use Value: Eliminates need for discrete MOSFETs or dedicated bus buffers while maintaining full I²C compliance at up to 400 kHz. |
Use Scenario: Direct LED on/off control from microcontroller GPIO pins with inverted logic polarity. IC Role / Device Role / Timing Role: Open-drain inverter sinks current through LED cathode; input HIGH turns LED ON, input LOW turns LED OFF. Use Value: Simplifies firmware logic (no software inversion needed) and provides robust current-limited drive up to 4 mA per channel. |
| Wired-AND Logic Interface | Reset Signal Conditioning |
Use Scenario: Combining multiple system fault signals (e.g., thermal shutdown, overcurrent, watchdog timeout) into a single active-low reset line. IC Role / Device Role / Timing Role: Each inverter input receives a separate fault signal; outputs tied together form a wired-AND node pulled up externally. Use Value: Provides hardware OR-of-faults (active-low) with no additional logic gates or timing skew between sources. |
Use Scenario: Inverting and conditioning a clean, debounced reset signal for microcontroller reset pin requiring active-low assertion. IC Role / Device Role / Timing Role: Converts active-high processor reset output to active-low system reset; open-drain allows safe sharing with other reset sources. Use Value: Adds noise immunity via CMOS input buffering and enables reset line arbitration in multi-controller systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar open-drain inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC05DR | Lower VCC range (1.65–5.5 V), faster tPLH/tPHL (≤16/13 ns @ 3.3 V), higher IOL (24 mA) | Better suited for 1.8 V/3.3 V-only systems; not rated for 6 V operation or –40°C to +125°C extended temp | Select when speed and low-voltage compatibility outweigh 6 V support and extended temperature needs. |
| MC74HC05ADR2G | Same logic function and SOIC-14 package; specified for –55°C to +125°C; slightly higher IOL (6 mA @ 4.5 V) | Qualified for military/aerospace use; tighter parametric tolerances but higher cost and longer lead times | Select when extended temperature qualification beyond commercial grade is mandatory for mission-critical hardware. |
Compared with SN74HC05DR, SN74LVC05DR offers superior speed and low-voltage operation but sacrifices 6 V tolerance and extended temperature range, while MC74HC05ADR2G provides broader temperature coverage and ruggedized specs at higher cost and reduced availability - making SN74HC05DR the optimal balance for industrial control and general-purpose open-drain inversion.
Availability
SN74HC05DR is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and consumer appliance control systems requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for SN74HC05DR 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 specializing in analog, embedded processing, and logic solutions, with decades of expertise in high-reliability logic families.
The SN74HC05DR belongs to TI's 74HC high-speed CMOS logic family, designed specifically for low-power, wide-supply-voltage digital interfacing in industrial, automotive, and computing applications.
FAQ
What is the maximum sink current per output of the SN74HC05DR?
The SN74HC05DR supports a maximum output sink current of 4 mA per channel at VCC = 4.5 V while maintaining VOL ≤ 0.26 V (typical). Absolute maximum ratings allow 25 mA continuous, but sustained operation above 4 mA risks exceeding thermal limits and degrading reliability. Always verify external pull-up resistor value and ambient temperature in final layout.
Can SN74HC05DR outputs be directly connected together?
Yes - SN74HC05DR outputs can be safely wired together because they are open-drain and cannot source current. This creates a natural wired-AND function: the combined node is LOW if any output is active, and HIGH only when all are Hi-Z. Ensure a single external pull-up resistor is used and total sink current remains within device and PCB trace limits.
Does SN74HC05DR require external pull-up resistors on its outputs?
Yes, SN74HC05DR requires external pull-up resistors on all open-drain outputs to establish a valid HIGH logic level. Without them, outputs remain floating in Hi-Z state and cannot drive logic-high signals. Typical values range from 1 kΩ (for speed-critical 5 V buses) to 10 kΩ (for low-power 3.3 V interfaces), selected based on VOL, rise time, and bus capacitance.
What is the recommended operating voltage range for SN74HC05DR?
The SN74HC05DR is specified for reliable operation from 2 V to 6 V DC supply voltage. At 2 V, propagation delays increase (tPLH/tPHL ≤ 145/120 ns), while at 6 V, VOL rises slightly (≤0.33 V at 5.2 mA) but speed improves (tPLH/tPHL ≤ 25/18 ns). Use 4.5–5.5 V for optimal balance of speed, noise margin, and compatibility with legacy 5 V systems.
How should unused inputs on SN74HC05DR be handled?
Unused inputs on SN74HC05DR must be terminated to either VCC or GND - never left floating - to prevent oscillation, excess current draw, and undefined output states. A 10 kΩ pull-up or pull-down resistor is recommended for flexibility; direct connection is acceptable if the input state is fixed. This requirement stems from the high-impedance CMOS input structure and is critical for stable operation.
SN74HC05DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Inverter
- Number of Circuits:
- 6
- Number of Inputs:
- 1
- Features:
- Open Drain
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Max):
- 2 µA
- Current - Output High, Low:
- -, 5.2mA
- Input Logic Level - Low:
- 0.5V ~ 1.8V
- Input Logic Level - High:
- 1.5V ~ 4.2V
- Max Propagation Delay @ V, Max CL:
- 20ns @ 6V, 50pF
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SN74HC05DR FAQ
1.How can I place an order for SN74HC05DR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC05DR 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 SN74HC05DR reliable?
The price and inventory of SN74HC05DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC05DR is usually 5 days.
3.What payment methods are accepted for SN74HC05DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC05DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC05DR?
SN74HC05DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC05DR 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 SN74HC05DR?
For technical support, including SN74HC05DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC05DR requirements.
6.How does Aetrix verify that SN74HC05DR is sourced from the original manufacturer or authorized distributors?
All SN74HC05DR 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 SN74HC05DR meets industry standards.
7.What is the process for return or replacement of SN74HC05DR?
All SN74HC05DR units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC05DR, 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 SN74HC05DR part is unused and in its original packaging.
Return procedure for SN74HC05DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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