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onsemi SN74LS05MEL
- Part No.:
- SN74LS05MEL
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- -
- Datasheet:
-
SN74LS05MEL.pdf
- Description:
- IC INVERTER
- Quantity:
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Inventory:7,940
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Product details
Overview
SN74LS05MEL from ON Semiconductor is a hex inverter with open-collector outputs, designed for level-shifting and wired-OR logic interfacing in TTL-compatible systems. It operates at 4.75–5.25 V, delivers 8 mA sink current per output, and exhibits 15–32 ns propagation delay across 0–70°C ambient range. It is used in bus driver, LED driver, and interface translation applications.
For engineers reviewing the SN74LS05MEL datasheet, pinout, applications, or equivalent options, key selection criteria include open-collector drive capability, guaranteed TTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), low-power Schottky process, SOEIAJ-14 package compatibility, and industrial temperature operation.
Technical Context
The SN74LS05MEL implements six independent inverting buffers using low-power Schottky bipolar technology. Each output is an open-collector transistor capable of sinking up to 8.0 mA while maintaining VOL ≤ 0.4 V at IOL = 4.0 mA and ≤ 0.5 V at IOL = 8.0 mA.
It guarantees TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and supports wired-OR logic via external pull-up resistors. Propagation delays are specified at tPLH = 17–32 ns and tPHL = 15–28 ns under CL = 15 pF, RL = 2.0 kΩ conditions at TA = 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.75 V to 5.25 V - ensures stable operation within standard TTL supply tolerance. |
| IOL (max) | 8.0 mA - defines maximum sink current per output without exceeding VOL spec. |
| tPLH / tPHL | 17–32 ns / 15–28 ns - determines maximum switching speed in wired-OR or level-shifted bus designs. |
| VIH / VIL | 2.0 V min / 0.8 V max - guarantees reliable recognition of TTL HIGH/LOW logic levels. |
| Operating Temp | 0°C to +70°C - qualifies for commercial and industrial ambient environments. |
| ICC (total) | 2.4 mA (output HIGH), 6.6 mA (output LOW) - enables power budgeting in multi-gate logic systems. |
Pinout & Package
SN74LS05MEL is housed in a 14-pin SOEIAJ (Small Outline EIAJ) plastic package (Case 965), with gull-wing leads, 1.27 mm pitch, and body dimensions 8.55 × 3.80 × 1.75 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Input | Accepts TTL-level logic signals; VIH ≥ 2.0 V, VIL ≤ 0.8 V. |
| 2, 4, 6, 8, 10, 12 | Open-collector Output | Sinks current only; requires external pull-up for HIGH state. |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry. |
| 14 | VCC | Positive supply rail (4.75–5.25 V); powers all six inverters. |
Key Features
| Feature | Design Value |
|---|---|
| Open-collector outputs | Enables wired-OR logic, level translation, and direct LED/bus driving without additional drivers. |
| Low-power Schottky process | Reduces power consumption vs. standard LS while retaining speed and noise immunity. |
| TTL-compatible input thresholds | Ensures interoperability with legacy 74LS, 74S, and microcontroller GPIOs without level shifters. |
| Guaranteed AC/DC specs over temp | Validated performance from 0°C to +70°C supports industrial control and instrumentation use. |
Applications
| Industrial Bus Interface | LED Indicator Driver |
|---|---|
Use Scenario: Driving multiple TTL-compatible address/data lines on a shared backplane with active-low enable signals. IC Role / Device Role / Timing Role: Hex inverter provides inverted, open-collector enable/control signals for bus transceivers and latches. Use Value: Wired-OR capability allows multiple SN74LS05MEL outputs to share one pull-up resistor, reducing component count and board space. | Use Scenario: Driving discrete LEDs from microcontroller GPIOs that lack sufficient sink current. IC Role / Device Role / Timing Role: Inverter stage converts logic-HIGH GPIO output into a grounded path for LED cathode connection. Use Value: 8 mA per output supports common indicator LEDs without external transistor buffering. |
| Level Translation (5 V → 3.3 V) | Wired-OR Logic Gate |
Use Scenario: Interfacing a 5 V TTL system to a 3.3 V FPGA I/O bank using a pull-up to 3.3 V. IC Role / Device Role / Timing Role: SN74LS05MEL acts as a unidirectional voltage translator by sinking current into a 3.3 V pull-up. Use Value: Eliminates need for dedicated level translators; leverages existing open-collector architecture and known VIH/VIL margins. | Use Scenario: Implementing priority interrupt arbitration where multiple sources assert a common INT# line. IC Role / Device Role / Timing Role: Each SN74LS05MEL inverter inverts and drives its source signal onto a shared wired-OR net. Use Value: Enables hardware-based OR logic with deterministic timing and no software overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS06N | Same logic function and open-collector outputs, but rated for 40 mA sink per output (vs. 8 mA). | Better suited for higher-current loads (e.g., relays, high-brightness LEDs); larger VIK (−1.5 V) limits input clamping margin. | Select SN74LS06N when >8 mA sink current is required; verify input clamp and layout thermal constraints. |
| SN74LS04N | Hex inverter with push-pull (not open-collector) outputs; no external pull-up needed. | Cannot perform wired-OR or level translation; limited to standard logic inversion with defined HIGH/LOW states. | Choose SN74LS04N only when true complementary output drive is required and bus sharing is unnecessary. |
Compared with SN74LS05MEL, SN74LS06N offers higher drive strength at the cost of greater power dissipation and reduced input protection margin, while SN74LS04N eliminates wiring flexibility for shared nets but simplifies termination and reduces external components.
Availability
SN74LS05MEL is available at Aetrix Electronics and suitable for industrial bus interface, LED indicator driver, level translation (5 V → 3.3 V), and wired-OR logic applications requiring stable component supply and long-term manufacturability.
Supply support for SN74LS05MEL 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 is a global semiconductor manufacturer specializing in energy-efficient electronics, with leadership in analog, logic, discrete, and power management solutions.
The SN74LS05MEL belongs to the 74LS logic family, engineered for TTL-compatible digital interfacing with low-power Schottky performance and robust industrial operating margins.
FAQ
What is the output configuration of the SN74LS05MEL?
The SN74LS05MEL features six independent open-collector outputs. Each output consists of a single NPN transistor emitter grounded internally, collector accessible externally, and base driven by the inverter stage. This configuration requires external pull-up resistors to establish a HIGH logic state and enables wired-OR functionality. The SN74LS05MEL does not provide active HIGH drive capability.
Does the SN74LS05MEL support operation at 3.3 V supply?
No, the SN74LS05MEL is specified only for VCC = 4.75–5.25 V. Its internal low-power Schottky TTL circuitry requires 5 V nominal operation to meet guaranteed VIH, VOL, and propagation delay specs. Operating below 4.75 V may result in marginal or non-compliant logic thresholds and timing behavior. For 3.3 V systems, consider logic-level translators or 3.3 V–compatible inverters instead of the SN74LS05MEL.
What is the maximum sink current per output of the SN74LS05MEL?
The SN74LS05MEL is rated for a maximum output sink current (IOL) of 8.0 mA per channel while maintaining VOL ≤ 0.5 V at VCC = 4.75 V and TA = 70°C. At IOL = 4.0 mA, VOL is guaranteed ≤ 0.4 V. Exceeding 8.0 mA risks violating the VOL specification and may cause excessive junction heating or long-term reliability degradation in the SN74LS05MEL.
Can the SN74LS05MEL be used for level translation between 5 V and 3.3 V logic domains?
Yes, the SN74LS05MEL can perform unidirectional level translation from 5 V inputs to 3.3 V–compatible outputs when configured with a 3.3 V pull-up resistor on each open-collector output. Its TTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) accept 5 V logic levels reliably, and the output swings between GND and 3.3 V. This use case is valid and documented in ON Semiconductor application guidance for the SN74LS05MEL.
What package type is used for the SN74LS05MEL?
The SN74LS05MEL uses the SOEIAJ-14 surface-mount package (Case 965), a gull-wing leaded variant of SOIC standardized by the Electronic Industries Association of Japan. It has 14 leads, 1.27 mm pitch, and overall dimensions of 8.55 mm × 3.80 mm × 1.75 mm. This package is distinct from the DIP (N suffix) and standard SOIC (D suffix) variants of the SN74LS05 family.
SN74LS05MEL 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:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74LS05MEL FAQ
1.How can I place an order for SN74LS05MEL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LS05MEL 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 SN74LS05MEL reliable?
The price and inventory of SN74LS05MEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LS05MEL is usually 5 days.
3.What payment methods are accepted for SN74LS05MEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LS05MEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LS05MEL?
SN74LS05MEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LS05MEL 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 SN74LS05MEL?
For technical support, including SN74LS05MEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LS05MEL requirements.
6.How does Aetrix verify that SN74LS05MEL is sourced from the original manufacturer or authorized distributors?
All SN74LS05MEL 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 SN74LS05MEL meets industry standards.
7.What is the process for return or replacement of SN74LS05MEL?
All SN74LS05MEL units undergo pre-shipment inspection (PSI). If there is an issue with SN74LS05MEL, 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 SN74LS05MEL part is unused and in its original packaging.
Return procedure for SN74LS05MEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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