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Texas Instruments SN74S04DR
- Part No.:
- SN74S04DR
- Manufacturer:
- Texas Instruments
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74S04DR.pdf
- Description:
- IC INVERTER 6CH 1-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,946
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Product details
Overview
SN74S04DR from Texas Instruments is a hex inverter IC in SOIC-14 package, implementing six independent TTL-compatible logic inverters with 5 V supply, 20 mA sink current capability, and 3–5 ns propagation delay per gate. It serves as a fundamental signal polarity reversal and noise-immune digital buffer in industrial control I/O stages, legacy bus interface level-shifting, and discrete logic glue circuits.
For engineers reviewing the SN74S04DR datasheet, SN74S04DR pinout, SN74S04DR application, or SN74S04DR equivalent, this page delivers verified electrical specs, validated SOIC-14 terminal mapping, real-world use cases in deterministic logic timing paths, and two confirmed alternative parts for design continuity.
Technical Context
The SN74S04DR uses Schottky-clamped TTL (S-series) transistor architecture to achieve high-speed switching with reduced saturation delay. Each inverter features a totem-pole output stage capable of sourcing −1 mA and sinking 20 mA at VCC = 5 V, enabling direct drive of multiple standard TTL inputs or small capacitive loads up to 15 pF.
Its input threshold is defined at VIH = 2 V and VIL = 0.8 V, ensuring robust noise margin against ground bounce and crosstalk in mixed-signal PCB environments. The device operates across 0°C to 70°C and requires all unused inputs tied to VCC or GND to prevent floating-node oscillation and excessive ICC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Six independent inverters (Y = A̅), positive-logic operation |
| Supply Voltage | 4.75 V to 5.25 V - tight tolerance ensures stable timing in regulated 5 V systems |
| Propagation Delay | 3 ns (tPHL) / 4.5 ns (tPLH) at RL = 280 Ω, CL = 15 pF - enables sub-100 MHz clock domain interfacing |
| Output Drive | 20 mA sink (IOL), −1 mA source (IOH) - drives up to 10 standard TTL loads per output |
| Input Thresholds | VIL = 0.8 V (max), VIH = 2 V (min) - provides ≥0.4 V DC noise margin under worst-case conditions |
| Power Dissipation | ICCL = 54 mA max at VCC = 5 V - total chip dissipation ~270 mW, requiring no heatsink in SOIC-14 |
Pinout & Package
SN74S04DR is housed in a 14-pin SOIC (D) package, 3.9 mm wide, 8.65 mm long, 1.75 mm max height, RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Input (1A–6A) | Individual inverter inputs; must be terminated to VCC or GND if unused to prevent metastability |
| 2, 4, 6, 8, 10, 12 | Output (1Y–6Y) | Active-low totem-pole outputs; each capable of driving 20 mA into GND or sourcing −1 mA from VCC |
| 7 | GND | Signal and power reference ground; primary return path for all output currents |
| 14 | VCC | +5 V supply rail; bypass capacitor (0.1 µF ceramic) required within 10 mm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| Schottky-clamped TTL process | Eliminates transistor saturation delay, enabling 3–5 ns propagation vs. 10+ ns in standard 7404 |
| High sink current (20 mA) | Directly interfaces with legacy TTL bus loads without external pull-up resistors or buffers |
| Low input current (±2 mA max) | Minimizes loading on upstream drivers; supports fan-out of ≥10 to standard TTL inputs |
| SOIC-14 surface-mount package | Enables automated assembly and higher board density than PDIP-14; compatible with IPC-7351B footprint |
| Industrial temperature range | Guaranteed operation from 0°C to 70°C - suitable for commercial and light-industrial embedded systems |
Applications
| Industrial PLC I/O Conditioning | Legacy Bus Signal Inversion |
|---|---|
Use Scenario: Reversing polarity of discrete sensor status signals (e.g., NPN proximity switch outputs) before feeding into microcontroller GPIOs with active-high logic interpretation. IC Role / Device Role / Timing Role: Logic-level inversion with deterministic 4.5 ns tPLH to ensure setup/hold compliance in 20 MHz scan-cycle PLC backplanes. Use Value: Eliminates need for discrete transistor inverters; reduces BOM count and layout area while maintaining TTL-compatible voltage thresholds. |
Use Scenario: Inverting address strobe (AS#) or write enable (WE#) signals in 8-bit microprocessor systems using 8080/8085 derivatives where inverted control timing is required. IC Role / Device Role / Timing Role: Critical path inverter with sub-5 ns delay, placed directly adjacent to CPU bus pins to minimize skew. Use Value: Guarantees <5 ns added delay in control signal routing, preserving strict 250 ns memory access timing windows. |
| Digital Test Equipment Signal Generation | Automated Test Fixture Glue Logic |
Use Scenario: Generating complementary test patterns for parallel DUT interface boards, where inverted versions of pattern generators are needed for differential stimulus. IC Role / Device Role / Timing Role: Synchronized inverter bank delivering matched delay across six channels for phase-aligned toggling. Use Value: Channel-to-channel skew <0.5 ns ensures simultaneous edge transitions across all six outputs, critical for multi-bit test vector accuracy. |
Use Scenario: Converting open-collector interrupt signals from legacy peripherals into clean CMOS-compatible active-high interrupts for modern ARM-based controllers. IC Role / Device Role / Timing Role: Level-shifting and inversion stage between 5 V TTL peripheral and 3.3 V controller I/O, with 20 mA sink capacity handling pull-down requirements. Use Value: Removes need for external biasing networks; single IC replaces discrete resistor-transistor inverter + level shifter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS04DR | Lower power (ICCL = 6.6 mA), slower speed (15 ns delay), 8 mA sink current | Better suited for low-noise, low-power control logic where speed is secondary | Select when thermal budget or EMI constraints outweigh timing requirements |
| SN74HC04DR | CMOS process, 2 V–6 V supply, 25 ns delay at 5 V, 4 mA drive, rail-to-rail swing | Required for mixed-voltage systems or battery-powered designs needing wider VCC range | Choose only if supply flexibility or ultra-low static current (<1 µA) is mandatory |
Compared with SN74LS04DR and SN74HC04DR, the SN74S04DR uniquely balances high-speed TTL compatibility with robust 20 mA drive in a standard SOIC-14 footprint-making it irreplaceable in legacy 5 V systems demanding sub-5 ns propagation and direct TTL fan-out.
Availability
SN74S04DR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy bus interface cards, and automated test fixture designs requiring stable component supply, long-term obsolescence mitigation, and guaranteed RoHS-compliant sourcing.
Supply support for SN74S04DR 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 industry-leading quality and longevity assurance.
The SN74S04DR belongs to TI's legacy 74S logic family, engineered specifically for high-speed, noise-tolerant digital system integration in industrial and military-grade equipment where deterministic timing and TTL interoperability are essential.
FAQ
What is the maximum operating temperature range for the SN74S04DR?
The SN74S04DR is rated for operation from 0°C to 70°C ambient temperature. This industrial-grade specification ensures reliable performance in commercial and light-industrial environments such as factory automation panels and benchtop test equipment. It does not support extended temperature ranges like −40°C to 85°C or −55°C to 125°C found in military variants (e.g., SNJ54S04J).
Can unused inputs on the SN74S04DR be left floating?
No - all unused inputs on the SN74S04DR must be tied to either VCC or GND. Floating TTL inputs can cause erratic output behavior, increased ICC, and potential latch-up due to internal transistor bias instability. TI explicitly mandates this in Note 3 of the SDLS029C datasheet to guarantee functional integrity and noise immunity.
What is the recommended decoupling for the SN74S04DR?
A 0.1 µF ceramic capacitor placed as close as possible (≤10 mm) to the VCC (pin 14) and GND (pin 7) terminals is required for stable operation. This suppresses high-frequency supply transients induced by simultaneous switching of multiple inverters. For systems with >10 devices, add a bulk 4.7 µF electrolytic capacitor per power rail segment.
Does the SN74S04DR support 3.3 V logic levels?
No - the SN74S04DR is a 5 V-only TTL device. Its input thresholds (VIH = 2 V min, VIL = 0.8 V max) and output swing (VOH ≈ 2.7 V min, VOL ≈ 0.5 V max at 20 mA) are incompatible with 3.3 V CMOS logic families. Interfacing with 3.3 V systems requires level-shifting circuitry or substitution with a 3.3 V–tolerant part like SN74LVC04A.
Is the SN74S04DR pin-compatible with other 74xx04 variants in SOIC-14?
Yes - the SN74S04DR shares identical pinout and SOIC-14 footprint with SN7404DR, SN74LS04DR, and SN74HC04DR. However, electrical characteristics differ significantly: drive strength, propagation delay, supply current, and voltage thresholds vary across families. Direct substitution requires validation of timing, fan-out, and noise margin in the target circuit.
SN74S04DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74S
- 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:
- -
- Voltage - Supply:
- 4.75V ~ 5.25V
- Current - Quiescent (Max):
- -
- Current - Output High, Low:
- 1mA, 20mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 5ns @ 5V, 50pF
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SN74S04DR FAQ
1.How can I place an order for SN74S04DR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74S04DR 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 SN74S04DR reliable?
The price and inventory of SN74S04DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74S04DR is usually 5 days.
3.What payment methods are accepted for SN74S04DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74S04DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74S04DR?
SN74S04DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74S04DR 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 SN74S04DR?
For technical support, including SN74S04DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74S04DR requirements.
6.How does Aetrix verify that SN74S04DR is sourced from the original manufacturer or authorized distributors?
All SN74S04DR 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 SN74S04DR meets industry standards.
7.What is the process for return or replacement of SN74S04DR?
All SN74S04DR units undergo pre-shipment inspection (PSI). If there is an issue with SN74S04DR, 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 SN74S04DR part is unused and in its original packaging.
Return procedure for SN74S04DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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