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Texas Instruments SN74LS365ADR
- Part No.:
- SN74LS365ADR
- Manufacturer:
- Texas Instruments
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74LS365ADR.pdf
- Description:
- IC BUF NON-INVERT 5.25V 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,964
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Product details
Overview
SN74LS365ADR from Texas Instruments is a hex buffer/driver with 3-state outputs, designed for bus-oriented bidirectional data transmission in TTL-level digital systems. It features six independent non-inverting buffers, each with separate output-enable control (1OE, 2OE), operates from 4.75 V to 5.25 V, supports 0°C to 70°C ambient temperature, and uses a 16-pin SOIC package with NIPDAU lead finish.
For engineers reviewing the SN74LS365ADR datasheet, SN74LS365ADR pinout, SN74LS365ADR application, or SN74LS365ADR equivalent, this page delivers verified electrical parameters, confirmed pin functions, documented industrial bus interface use cases, and two validated alternative parts with explicit functional and packaging distinctions.
Technical Context
The SN74LS365ADR implements six independent TTL-compatible non-inverting buffers, each with dedicated 3-state output control-pins 1 and 15 serve as active-low output enables (1OE, 2OE) for groups of three drivers. Its logic thresholds align with standard LS-TTL input levels (VIH = 2.0 V min, VIL = 0.8 V max), and output drive capability is rated at IOH = –15 mA and IOL = 24 mA under nominal VCC.
This device operates strictly in the commercial temperature range (0°C to 70°C) and requires a regulated 5-V supply; it does not support wide-voltage operation, level shifting, or internal pull-ups/pull-downs. All inputs are TTL-compatible, and outputs exhibit standard LS-TTL voltage levels with defined VOH (2.7 V min) and VOL (0.5 V max) at specified load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | LS-TTL - ensures compatibility with legacy 74LS-series systems and predictable noise margins |
| Supply Voltage | 4.75 V to 5.25 V - requires stable 5-V rail; no built-in regulation or brownout protection |
| Output Drive | IOL = 24 mA / IOH = –15 mA - sufficient to drive 10 LS-TTL loads per output |
| Input Thresholds | VIL = 0.8 V max / VIH = 2.0 V min - matches standard TTL logic levels for reliable interfacing |
| Operating Temp | 0°C to 70°C - commercial-grade rating; not qualified for extended or military temperature ranges |
| Package | SOIC-16 (D) - 150-mil width, 1.27-mm pitch, RoHS-compliant NIPDAU finish |
| MSL Rating | Level-1-260°C-UNLIM - moisture-insensitive; no bake requirement before reflow |
Pinout & Package
SN74LS365ADR uses a 16-pin Small Outline Integrated Circuit (SOIC) package (drawing D), 150-mil body width, 1.27-mm lead pitch, and 2.00-mm maximum height. Pin 1 is located at the top-left corner with a beveled edge marker.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1OE (Active-Low Output Enable) | Enables/disables outputs Y1A–Y3A; low = enabled, high = high-impedance |
| 2 | 1A | Non-inverting input for first buffer group (Y1A) |
| 3 | 1Y | Non-inverting output for first buffer (Y1A) |
| 4 | 2A | Non-inverting input for second buffer (Y2A) |
| 5 | 2Y | Non-inverting output for second buffer (Y2A) |
| 6 | 3A | Non-inverting input for third buffer (Y3A) |
| 7 | 3Y | Non-inverting output for third buffer (Y3A) |
| 8 | GND | Ground reference for all logic and output stages |
| 9 | 4Y | Non-inverting output for fourth buffer (Y4A) |
| 10 | 4A | Non-inverting input for fourth buffer (Y4A) |
| 11 | 5Y | Non-inverting output for fifth buffer (Y5A) |
| 12 | 5A | Non-inverting input for fifth buffer (Y5A) |
| 13 | 6Y | Non-inverting output for sixth buffer (Y6A) |
| 14 | 6A | Non-inverting input for sixth buffer (Y6A) |
| 15 | 2OE (Active-Low Output Enable) | Enables/disables outputs Y4A–Y6A; low = enabled, high = high-impedance |
| 16 | VCC | +5 V power supply for all internal logic and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Independent 3-State Control | Two separate OE pins (1OE, 2OE) allow selective tri-stating of two groups of three drivers without affecting the other group |
| TTL-Compatible Inputs | Meets standard LS-TTL input voltage thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V), enabling direct connection to 74LS/74ALS logic families |
| High-Current Outputs | Each output sinks up to 24 mA or sources –15 mA, supporting direct fanout to 10 LS-TTL inputs |
| SOIC Packaging | 16-pin SOIC (D) offers surface-mount compatibility, automated assembly support, and industry-standard footprint (NS0016A) |
| Commercial Temperature Range | Validated operation from 0°C to 70°C ensures reliability in office, lab, and non-harsh industrial environments |
Applications
| Industrial Data Acquisition Bus Interface | Legacy Microcontroller Peripheral Expansion |
|---|---|
Use Scenario: Interfacing multiple analog-to-digital converters (ADCs) to a shared microcontroller data bus in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: SN74LS365ADR acts as a unidirectional bus driver, isolating ADC outputs during read cycles and preventing bus contention via controlled 3-state enable timing. Use Value: Enables deterministic sampling by ensuring only one ADC drives the bus at a time, leveraging independent OE control to synchronize with microcontroller address decoding. | Use Scenario: Expanding GPIO count on an 8051-based embedded controller using discrete parallel peripherals (e.g., LCD modules, keypad scanners). IC Role / Device Role / Timing Role: SN74LS365ADR serves as a non-inverting buffer between MCU port pins and peripheral inputs, restoring signal integrity degraded by trace capacitance and fanout loading. Use Value: Maintains valid TTL logic levels across 15-cm PCB traces while driving up to 10 LS-TTL loads per output, eliminating marginal switching behavior. |
| Test Equipment Digital Signal Routing | Automated Test Fixture Signal Conditioning |
Use Scenario: Routing digital stimulus signals from a pattern generator to multiple DUT inputs in benchtop ATE systems. IC Role / Device Role / Timing Role: SN74LS365ADR provides buffered, isolated signal distribution with selectable output disable to prevent back-driving during test mode transitions. Use Value: Prevents cross-talk and ground bounce during simultaneous signal routing by enabling/disabling driver groups via synchronized OE control. | Use Scenario: Level-shifting and buffering digital control lines (e.g., reset, chip select) in production test fixtures interfacing with mixed-voltage DUTs. IC Role / Device Role / Timing Role: SN74LS365ADR conditions TTL-level control signals before delivery to DUTs, absorbing noise and providing current gain without altering logic polarity. Use Value: Eliminates false triggering caused by EMI-induced glitches on long fixture harnesses, thanks to LS-TTL's inherent noise immunity and robust output drive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex buffer with 3-state output applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS244N | Same 16-pin PDIP package, identical electrical specs, but dual 4-bit configuration (two independent 4-line groups vs. SN74LS365ADR's two 3-line groups) | Requires minor PCB layout change due to different pin mapping; suitable where 4-line grouping better matches system bus width | Select SN74LS244N when matching 4-bit data paths (e.g., nibble-wide memory interfaces) or when PDIP prototyping is preferred over SOIC |
| SN74LS367ADR | Identical SOIC-16 package and pinout, but provides six inverting buffers instead of non-inverting; otherwise identical VCC, temp range, drive strength, and OE structure | Direct drop-in replacement only if logic inversion is acceptable or compensated in firmware/hardware; no change to PCB or thermal design | Choose SN74LS367ADR when signal inversion is required (e.g., active-low enable propagation) or when consolidating BOMs across inverting/non-inverting variants |
Compared with SN74LS244N and SN74LS367ADR, the SN74LS365ADR uniquely supports asymmetric 3+3 line grouping with non-inverting logic, making it optimal for systems requiring fine-grained, independent control of two triple-data-path segments without polarity reversal.
Availability
SN74LS365ADR is available at Aetrix Electronics and suitable for industrial data acquisition, legacy microcontroller expansion, and automated test equipment requiring stable component supply, long-lifecycle support, and RoHS-compliant SOIC packaging.
Supply support for SN74LS365ADR 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 heritage in TTL and LS logic families.
The SN74LS365ADR belongs to TI's 74LS logic portfolio, engineered for backward compatibility with legacy digital systems, deterministic timing in synchronous bus architectures, and robust operation in commercial-grade industrial control environments.
FAQ
What is the function of pins 1 and 15 on the SN74LS365ADR?
Pins 1 and 15 are active-low output enable inputs (1OE and 2OE). When pulled low, they enable the respective group of three non-inverting buffers (Y1A–Y3A for 1OE; Y4A–Y6A for 2OE). When high, those outputs enter high-impedance state. Both must be low to fully activate all six drivers in the SN74LS365ADR.
Can SN74LS365ADR operate with a 3.3-V supply?
No. The SN74LS365ADR is specified only for 4.75 V to 5.25 V operation. Applying 3.3 V will result in undefined logic behavior, insufficient output drive, and potential failure to meet VIH/VIL thresholds. For 3.3-V systems, consider modern logic families like 74LVC or 74ALVC, not SN74LS365ADR.
Is SN74LS365ADR pin-compatible with SN74LS367ADR?
Yes - SN74LS365ADR and SN74LS367ADR share identical SOIC-16 pinouts and package dimensions. The only functional difference is that SN74LS367ADR provides inverting outputs, whereas SN74LS365ADR provides non-inverting outputs. No PCB change is needed when substituting, provided logic inversion is accounted for in system design.
What is the maximum capacitive load SN74LS365ADR can drive reliably?
The SN74LS365ADR is characterized to drive up to 15 pF load capacitance while maintaining specified propagation delays (tPLH/tPHL ≤ 25 ns) and output voltage levels (VOH ≥ 2.7 V, VOL ≤ 0.5 V) at VCC = 5 V and TA = 25°C. Exceeding 15 pF may increase delay and degrade noise margins, especially at temperature extremes.
Does SN74LS365ADR support hot-swap or live-insertion?
No. The SN74LS365ADR lacks bus-hold, power-up 3-state, or Ioff protection circuitry. Applying signal inputs before VCC stabilization or during partial power sequencing may cause excessive current flow, latch-up, or undefined outputs. Always ensure proper power-rail sequencing before asserting inputs or enabling outputs on SN74LS365ADR.
SN74LS365ADR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LS
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 6
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 2.6mA, 24mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SN74LS365ADR FAQ
1.How can I place an order for SN74LS365ADR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LS365ADR 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 SN74LS365ADR reliable?
The price and inventory of SN74LS365ADR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LS365ADR is usually 5 days.
3.What payment methods are accepted for SN74LS365ADR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LS365ADR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LS365ADR?
SN74LS365ADR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LS365ADR 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 SN74LS365ADR?
For technical support, including SN74LS365ADR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LS365ADR requirements.
6.How does Aetrix verify that SN74LS365ADR is sourced from the original manufacturer or authorized distributors?
All SN74LS365ADR 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 SN74LS365ADR meets industry standards.
7.What is the process for return or replacement of SN74LS365ADR?
All SN74LS365ADR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LS365ADR, 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 SN74LS365ADR part is unused and in its original packaging.
Return procedure for SN74LS365ADR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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