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Home > Products > Integrated Circuits (ICs) > Logic > Gates and Inverters

onsemi SN74LS04MR1

Name: SN74LS04MR1
Brand: onsemi
SKU: SN74LS04MR1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LS04MR1

Manufacturer:: onsemi

Category:: Gates and Inverters

Package:: -

Datasheet:: SN74LS04MR1.pdf

Description:: IC INVERTER

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Product details

Overview

SN74LS04MR1 from ON Semiconductor is a hex inverter logic IC using low-power Schottky (LS) TTL technology, featuring six independent inverters in a single SOEIAJ-14 package. It operates at 4.75–5.25 V supply voltage, delivers ±8 mA output drive, and achieves 9–15 ns propagation delay at 25°C with 15 pF load - suitable for digital signal inversion in industrial control timing circuits.

For engineers reviewing the SN74LS04MR1 datasheet, pinout, applications, or equivalent options, key selection considerations include guaranteed V_OH ≥2.7 V at I_OH = −0.4 mA, V_OL ≤0.4 V at I_OL = 4.0 mA, input thresholds (V_IH = 2.0 V, V_IL = 0.8 V), and operation across 0°C to +70°C ambient.

Technical Context

The SN74LS04MR1 implements standard TTL-compatible inverting logic with Schottky-clamped transistor outputs to suppress saturation delay. Each of its six channels provides true logical inversion without internal feedback or enable control, requiring no external biasing or pull-up resistors for standard interfacing.

It conforms to LS-TTL electrical specifications: VIH/VIL thresholds ensure noise immunity against 0.4 V low-state and 0.8 V high-state margins; output stages are rated for short-circuit current up to −100 mA (limited to one output at a time, <1 s duration) and support fan-out of 20 LS-TTL loads.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.75–5.25 V - ensures compatibility with standard 5 V TTL/LS logic rails and stable operation under ±5% regulation tolerance.
Propagation Delay	9–15 ns - defines maximum clock-to-output timing uncertainty in synchronous logic chains driving 15 pF capacitive loads.
Output Drive	I_OL = 8.0 mA / I_OH = −0.4 mA - supports direct interface to multiple LS-TTL inputs or discrete LED indicators without buffering.
Input Thresholds	V_IL ≤ 0.8 V, V_IH ≥ 2.0 V - guarantees reliable recognition of low/high logic states across temperature and process variation.
Operating Temperature	0°C to +70°C - validated for commercial-grade embedded systems including programmable logic controllers and instrumentation front-ends.
Power Dissipation	I_CC = 2.4 mA (high-output) / 6.6 mA (low-output) - enables thermal design for multi-device boards with predictable static current draw per gate.

Pinout & Package

SN74LS04MR1 is housed in a 14-pin SOEIAJ (Small Outline EIAJ) plastic package (Case 965), measuring 8.55 × 3.80 × 1.75 mm, with gull-wing leads and 1.27 mm pitch. The package is lead-free and RoHS-compliant per ON Semiconductor specification.

Pin/Terminal	Circuit Role	Design Meaning
1, 3, 5, 9, 11, 13	Input A–F	Independent TTL-compatible logic inputs; each accepts 0–5 V signals and drives one inverter stage.
2, 4, 6, 8, 10, 12	Output Y1–Y6	Active-low open-collector–like outputs with Schottky-clamped totem-pole structure; sink up to 8 mA.
7	GND	Ground reference for all logic and power paths; must be connected to system common return plane.
14	V_CC	+5 V supply rail; decoupling capacitor (0.1 µF ceramic) required within 10 mm of this pin for noise suppression.

Key Features

Feature	Design Value
Hex Inverter Function	Six fully independent, non-inverting-input inverters in one IC - eliminates need for six discrete gates and reduces board space by >70% vs DIP equivalents.
Low-Power Schottky (LS)	Reduces propagation delay vs standard TTL while cutting power consumption by ~50%, enabling higher-density logic designs.
TTL-Compatible Interface	Direct interoperability with 74xx, 74LSxx, and 74Fxx families without level-shifting - simplifies mixed-logic-system integration.
Guaranteed AC/DC Specs	All min/max DC parameters (V_OH, V_OL, I_IH, I_IL) and AC delays (t_PLH, t_PHL) are production-tested per original ON Semiconductor factory test program.

Applications

Industrial PLC I/O Conditioning	Digital Signal Polarity Correction
Use Scenario: Inverting sensor status signals (e.g., active-low limit switches) before feeding into microcontroller GPIOs with fixed interrupt polarity requirements. IC Role / Device Role / Timing Role: Level-shifting and logic inversion stage between field devices and controller input buffers. Use Value: Eliminates software-based bit-flipping and ensures deterministic hardware-level response within 15 ns, critical for cycle-time-critical motion control loops.	Use Scenario: Correcting inverted data bus lines caused by PCB trace routing constraints or legacy peripheral interface mismatches. IC Role / Device Role / Timing Role: Synchronous signal polarity correction on parallel address/data buses operating at ≤20 MHz. Use Value: Restores correct logic polarity without adding clock skew or setup/hold violations, as t_PLH/t_PHL mismatch is ≤6 ns.
Legacy System Logic Retrofit	LED Driver Interface
Use Scenario: Replacing obsolete 7404 DIP packages in aging test equipment where SOEIAJ footprint allows drop-in replacement with minimal rework. IC Role / Device Role / Timing Role: Pin-compatible functional substitute preserving existing timing margins and fan-out loading. Use Value: Maintains original system timing integrity while extending supply chain viability via Rochester Electronics' qualified recreation.	Use Scenario: Driving common-anode LEDs from microcontroller outputs that source current but require active-low turn-on control. IC Role / Device Role / Timing Role: Current-sinking driver stage converting high-active MCU outputs to low-active LED enable signals. Use Value: Leverages I_OL = 8.0 mA rating to directly drive 5 mm LEDs at 10 mA peak without external transistors or resistors.

Industrial PLC I/O Conditioning

Digital Signal Polarity Correction

Use Scenario: Inverting sensor status signals (e.g., active-low limit switches) before feeding into microcontroller GPIOs with fixed interrupt polarity requirements.

IC Role / Device Role / Timing Role: Level-shifting and logic inversion stage between field devices and controller input buffers.

Use Value: Eliminates software-based bit-flipping and ensures deterministic hardware-level response within 15 ns, critical for cycle-time-critical motion control loops.

Use Scenario: Correcting inverted data bus lines caused by PCB trace routing constraints or legacy peripheral interface mismatches.

IC Role / Device Role / Timing Role: Synchronous signal polarity correction on parallel address/data buses operating at ≤20 MHz.

Use Value: Restores correct logic polarity without adding clock skew or setup/hold violations, as t_PLH/t_PHL mismatch is ≤6 ns.

Legacy System Logic Retrofit

LED Driver Interface

Use Scenario: Replacing obsolete 7404 DIP packages in aging test equipment where SOEIAJ footprint allows drop-in replacement with minimal rework.

IC Role / Device Role / Timing Role: Pin-compatible functional substitute preserving existing timing margins and fan-out loading.

Use Value: Maintains original system timing integrity while extending supply chain viability via Rochester Electronics' qualified recreation.

Use Scenario: Driving common-anode LEDs from microcontroller outputs that source current but require active-low turn-on control.

IC Role / Device Role / Timing Role: Current-sinking driver stage converting high-active MCU outputs to low-active LED enable signals.

Use Value: Leverages I_OL = 8.0 mA rating to directly drive 5 mm LEDs at 10 mA peak without external transistors or resistors.

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex inverter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LS04N	Same logic function and DC/AC specs, but in 14-pin PDIP package (Case 646); higher thermal resistance and larger footprint.	Preferred for through-hole prototyping or legacy board repair where SOEIAJ reflow is unavailable.	Select when manual soldering, socketing, or mechanical robustness in vibration-prone environments is prioritized over board density.
SN74LS04D	Identical electrical performance, but in SOIC-14 (Case 751A); 3.9 mm body width vs 3.8 mm for SOEIAJ, with different leadform geometry.	Used in automated SMT lines with standard SOIC pick-and-place tooling; not mechanically interchangeable with SOEIAJ footprints.	Choose for new designs targeting mainstream SOIC assembly infrastructure and JEDEC-standard packaging compliance.

Compared with SN74LS04MR1, SN74LS04N offers through-hole reliability at the cost of board area and thermal performance, while SN74LS04D provides identical functionality in a JEDEC-standard SOIC package - both require layout adaptation but preserve full logic and timing equivalence.

Availability

SN74LS04MR1 is available at Aetrix Electronics and suitable for industrial PLC I/O conditioning, digital signal polarity correction, and legacy system logic retrofit requiring stable component supply and long-term obsolescence mitigation.

Supply support for SN74LS04MR1 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

ON Semiconductor (now onsemi) is a global semiconductor manufacturer specializing in energy-efficient power management, analog, logic, and discrete devices for automotive, industrial, and computing markets.

The SN74LS04MR1 belongs to the classic 74LS logic family, designed specifically to deliver reliable, low-power TTL-compatible inversion in cost-sensitive, high-volume industrial control and instrumentation applications.

FAQ

What logic family does SN74LS04MR1 belong to, and how does it differ from standard TTL?

SN74LS04MR1 belongs to the low-power Schottky (74LS) TTL family. Unlike standard 74xx TTL, it uses Schottky diodes to prevent transistor saturation, reducing propagation delay to 9–15 ns while cutting power consumption by approximately half. Its V_IH/V_IL thresholds and output drive remain fully compatible with earlier TTL families, allowing seamless integration without redesign.

Is SN74LS04MR1 pin-compatible with other 74LS04 variants like SN74LS04N or SN74LS04D?

SN74LS04MR1 shares identical pinout and logic function with SN74LS04N (PDIP) and SN74LS04D (SOIC), as all conform to the standard 74LS04 14-pin configuration. However, physical package dimensions and leadforms differ: MR1 uses SOEIAJ (Case 965), N uses PDIP (Case 646), and D uses SOIC (Case 751A). Board layout must match the specific package's footprint.

What is the maximum capacitive load SN74LS04MR1 can drive while maintaining specified propagation delay?

SN74LS04MR1's AC characteristics (t_PLH, t_PHL) are specified with a 15 pF load at V_CC = 5.0 V and T_A = 25°C. Driving loads beyond 15 pF increases delay nonlinearly - e.g., at 50 pF, typical delay exceeds 25 ns. For heavier loads, buffer stages or reduced fan-out are recommended to maintain timing integrity in SN74LS04MR1-based designs.

Does SN74LS04MR1 support operation outside the 0°C to +70°C range?

No - SN74LS04MR1 is characterized and guaranteed only for 0°C to +70°C ambient operation per its official datasheet. While some units may function outside this range, parameters like V_OH, t_PLH, and I_CC are not tested or warranted beyond these limits. For extended temperature applications, consider automotive-qualified alternatives such as SN74LS04QDRG4 (−40°C to +125°C).

How is SN74LS04MR1 sourced, and what quality assurance applies to this part?

SN74LS04MR1 is manufactured by Rochester Electronics under license from ON Semiconductor, using original die or IP-recreated wafers approved by the OEM. It undergoes testing per original factory programs and meets ISO-9001, AS9120, and MIL-PRF-35835 Class Q standards. Performance is guaranteed to match the original SN74LS04 datasheet specifications.

SN74LS04MR1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Logic Type:: -

Number of Circuits:: -

Number of Inputs:: -

Features:: -

Voltage - Supply:: -

Current - Quiescent (Max):: -

Current - Output High, Low:: -

Input Logic Level - Low:: -

Input Logic Level - High:: -

Max Propagation Delay @ V, Max CL:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

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Supplier Device Package:: -

SN74LS04MR1 FAQ

1.How can I place an order for SN74LS04MR1 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LS04MR1 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 SN74LS04MR1 reliable?

The price and inventory of SN74LS04MR1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LS04MR1 is usually 5 days.

3.What payment methods are accepted for SN74LS04MR1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LS04MR1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LS04MR1?

SN74LS04MR1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LS04MR1 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 SN74LS04MR1?

For technical support, including SN74LS04MR1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LS04MR1 requirements.

6.How does Aetrix verify that SN74LS04MR1 is sourced from the original manufacturer or authorized distributors?

All SN74LS04MR1 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 SN74LS04MR1 meets industry standards.

7.What is the process for return or replacement of SN74LS04MR1?

All SN74LS04MR1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LS04MR1, 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 SN74LS04MR1 part is unused and in its original packaging.

Return procedure for SN74LS04MR1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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