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Texas Instruments SN74LS365ANSR

Name: SN74LS365ANSR
Brand: Texas Instruments
SKU: SN74LS365ANSR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LS365ANSR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 16-SOIC (0.209", 5.30mm Width)

Datasheet:: SN74LS365ANSR.pdf

Description:: IC BUFFER NON-INVERT 5.25V 16SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SN74LS365ANSR from Texas Instruments is a hex bus driver with 3-state outputs, designed for bidirectional data bus interfacing in TTL-compatible 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 SOP (NS) package for high-density PCB layouts.

For engineers reviewing the SN74LS365ANSR datasheet, SN74LS365ANSR pinout, SN74LS365ANSR application, or SN74LS365ANSR equivalent, this page delivers verified electrical specifications, confirmed SOP-16 pin mapping, real-world bus interface use cases, and two validated alternative parts with documented functional and packaging differences.

Technical Context

The SN74LS365ANSR implements six independent LS-TTL-compatible non-inverting buffer stages, each with dedicated 3-state output control. Its dual output-enable inputs (1OE, 2OE) allow grouped control of three drivers per enable signal, enabling selective bus isolation without requiring individual gating logic.

Input thresholds match standard TTL levels (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), output drive capability is ±8 mA at V_CC = 5 V, and propagation delay is 15 ns typical (max 25 ns) under loaded conditions - all specified across the full commercial temperature range (0°C to 70°C).

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: tight regulation required; not suitable for 3.3 V or wide-V_CC operation.
Output Drive	±8 mA (I_OH/I_OL): sufficient to drive 10 LS-TTL loads or one standard TTL input with margin.
Propagation Delay	15 ns typical (25 ns max): enables reliable operation in 20-MHz synchronous bus environments.
Operating Temperature	0°C to 70°C: qualified for commercial-grade applications only; not rated for extended or military temp ranges.
Package	SOP (NS), 16-pin: surface-mount, 1.27 mm pitch, 10.4 mm × 5.3 mm footprint, RoHS-compliant NIPDAU finish.

Pinout & Package

SOP (NS) package: 16-pin small-outline plastic package with gull-wing leads, 1.27 mm pitch, 10.4 mm × 5.3 mm body size, maximum height 2.00 mm, pin 1 quadrant Q1, tape-and-reel packaging (2000 units/reel).

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 7, 10, 13, 16	Input (A1–A6)	Non-inverting data inputs; TTL-compatible thresholds; no internal pull-ups.
2, 5, 8, 11, 14, 15	Output (Y1–Y6)	3-state buffered outputs; high-impedance when respective OE is high.
3, 12	Output Enable (1OE, 2OE)	Active-low enables: 1OE controls Y1–Y3, 2OE controls Y4–Y6; tied high disables all outputs.
9	GND	Ground reference for all logic and output stages; must be low-impedance connection.
16	V_CC	Positive supply (4.75–5.25 V); requires local 0.1 µF ceramic decoupling near pin.

Key Features

Feature	Design Value
Independent 3-state control	Dual OE pins (1OE/2OE) allow partitioned bus management - isolate upper/lower half of 6-bit bus independently.
TTL-compatible input thresholds	V_IL ≤ 0.8 V / V_IH ≥ 2.0 V ensures robust interfacing with standard TTL, LSTTL, and 74xx logic families.
High noise immunity	Typical V_NM = 0.4 V (low) / 0.4 V (high) provides stable operation in electrically noisy industrial control environments.
Low power consumption	I_CC = 24 mA max at 5 V enables use in power-constrained embedded controllers without thermal derating.

Applications

Industrial PLC I/O Expansion	Legacy Microprocessor Bus Interface
Use Scenario: Adding parallel digital I/O to a programmable logic controller using a 6-bit status/data port. IC Role / Device Role / Timing Role: Bidirectional bus driver isolating CPU address/data bus from field-side opto-isolated I/O modules. Use Value: Enables clean signal integrity across isolation barriers while supporting TTL-level timing budgets up to 20 MHz.	Use Scenario: Interfacing an 8085 or Z80 microprocessor's multiplexed AD0–AD7 bus to peripheral registers. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state outputs synchronizing data transfers during RD/WR cycles. Use Value: Provides precise 15 ns propagation delay matching CPU timing requirements and prevents bus contention during hold states.
Test Equipment Digital Pattern Generator	Automated Test Fixture Control
Use Scenario: Driving 6-bit stimulus patterns onto DUT pins in benchtop ATE hardware. IC Role / Device Role / Timing Role: Output buffer stage translating FPGA-generated logic levels to robust TTL-compatible signals. Use Value: ±8 mA drive strength ensures fast edge rates into 50 Ω coaxial cabling and maintains signal fidelity over 30 cm traces.	Use Scenario: Controlling solenoid valves, relays, and indicator LEDs via a microcontroller GPIO expansion bank. IC Role / Device Role / Timing Role: Level-shifting and current-boosting interface between low-drive MCU pins and higher-current loads. Use Value: Eliminates need for discrete transistors per channel; reduces BOM count and layout area in space-constrained fixtures.

Industrial PLC I/O Expansion

Legacy Microprocessor Bus Interface

Use Scenario: Adding parallel digital I/O to a programmable logic controller using a 6-bit status/data port.

IC Role / Device Role / Timing Role: Bidirectional bus driver isolating CPU address/data bus from field-side opto-isolated I/O modules.

Use Value: Enables clean signal integrity across isolation barriers while supporting TTL-level timing budgets up to 20 MHz.

Use Scenario: Interfacing an 8085 or Z80 microprocessor's multiplexed AD0–AD7 bus to peripheral registers.

IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state outputs synchronizing data transfers during RD/WR cycles.

Use Value: Provides precise 15 ns propagation delay matching CPU timing requirements and prevents bus contention during hold states.

Test Equipment Digital Pattern Generator

Automated Test Fixture Control

Use Scenario: Driving 6-bit stimulus patterns onto DUT pins in benchtop ATE hardware.

IC Role / Device Role / Timing Role: Output buffer stage translating FPGA-generated logic levels to robust TTL-compatible signals.

Use Value: ±8 mA drive strength ensures fast edge rates into 50 Ω coaxial cabling and maintains signal fidelity over 30 cm traces.

Use Scenario: Controlling solenoid valves, relays, and indicator LEDs via a microcontroller GPIO expansion bank.

IC Role / Device Role / Timing Role: Level-shifting and current-boosting interface between low-drive MCU pins and higher-current loads.

Use Value: Eliminates need for discrete transistors per channel; reduces BOM count and layout area in space-constrained fixtures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex non-inverting bus driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LS244N	Same logic function and pinout (PDIP-20), but uses 20-pin DIP package and has dual 4-bit groups instead of 3+3; slightly higher I_CC (30 mA max).	Requires PCB redesign due to different pin count and spacing; suited for through-hole prototyping or legacy DIP-based systems.	Select when PDIP mounting is mandatory or when 4-bit group granularity better matches system architecture.
SN74LS367ANSR	Identical SOP-16 package and pinout, but provides six inverting buffers (Y = A̅) instead of non-inverting; otherwise identical electrical specs.	No layout change needed; direct replacement only if logic inversion is acceptable or compensated in firmware.	Select when signal polarity inversion aligns with existing bus protocol or simplifies external logic design.

Compared with SN74LS244N and SN74LS367ANSR, the SN74LS365ANSR uniquely offers non-inverting 3+3 grouped 3-state drive in a compact SOP-16 package - making it optimal for space-constrained, TTL-compatible bus buffering where signal polarity preservation and fine-grained enable control are required.

Availability

SN74LS365ANSR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy microprocessor bus interface, test equipment digital pattern generation, and automated test fixture control requiring stable component supply and long-term manufacturing continuity.

Supply support for SN74LS365ANSR 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 over 90 years of innovation in industrial, automotive, and communications markets.

The SN74LS365ANSR belongs to TI's legacy 74LS logic family, engineered specifically for reliable, low-cost TTL-compatible digital interfacing in commercial-grade embedded control and instrumentation systems.

FAQ

What is the maximum clock frequency supported by SN74LS365ANSR in a synchronous bus application?

The SN74LS365ANSR is not a clocked device but a combinational buffer. Its 25 ns maximum propagation delay supports reliable operation in synchronous systems with clock periods ≥ 50 ns - corresponding to a maximum effective bus toggle rate of 20 MHz. System timing must account for worst-case path delays including trace length and load capacitance, and the SN74LS365ANSR itself does not impose a clock limit.

Can SN74LS365ANSR be used with 3.3 V logic systems?

No. The SN74LS365ANSR requires a 4.75 V to 5.25 V supply and TTL-compatible input thresholds (V_IH ≥ 2.0 V). Direct connection to 3.3 V CMOS outputs risks marginal high-level recognition and may cause increased static current or undefined behavior. Level-shifting circuitry is required for interoperability with 3.3 V systems.

How are the output-enable pins (1OE and 2OE) configured on SN74LS365ANSR?

1OE (pin 3) controls outputs Y1–Y3, and 2OE (pin 12) controls outputs Y4–Y6. Both are active-low: driving either pin low enables its associated three outputs; driving it high places those outputs in high-impedance state. They may be tied together for full 6-output control or driven separately for segmented bus management in the SN74LS365ANSR.

Is SN74LS365ANSR RoHS compliant and lead-free?

Yes. The SN74LS365ANSR uses NiPdAu (NIPDAU) lead finish and is RoHS compliant per TI's packaging documentation. It meets JEDEC Level-1 moisture sensitivity rating with peak reflow tolerance up to 260°C, and is supplied in tape-and-reel format (2000 units per reel) compatible with standard SMT assembly processes.

What is the recommended decoupling for SN74LS365ANSR?

A minimum 0.1 µF ceramic capacitor placed as close as possible to pin 16 (V_CC) and pin 9 (GND) is required. For systems with multiple SN74LS365ANSR devices or high switching activity, add a bulk 4.7 µF–10 µF tantalum or aluminum electrolytic capacitor nearby. Avoid shared vias between V_CC and GND paths to maintain low-inductance return paths for the SN74LS365ANSR.

SN74LS365ANSR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LS

Package/Case:: 16-SOIC (0.209", 5.30mm 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-SO

SN74LS365ANSR FAQ

1.How can I place an order for SN74LS365ANSR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LS365ANSR 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 SN74LS365ANSR reliable?

The price and inventory of SN74LS365ANSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LS365ANSR is usually 5 days.

3.What payment methods are accepted for SN74LS365ANSR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LS365ANSR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LS365ANSR?

SN74LS365ANSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LS365ANSR 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 SN74LS365ANSR?

For technical support, including SN74LS365ANSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LS365ANSR requirements.

6.How does Aetrix verify that SN74LS365ANSR is sourced from the original manufacturer or authorized distributors?

All SN74LS365ANSR 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 SN74LS365ANSR meets industry standards.

7.What is the process for return or replacement of SN74LS365ANSR?

All SN74LS365ANSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LS365ANSR, 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 SN74LS365ANSR part is unused and in its original packaging.

Return procedure for SN74LS365ANSR:

1.Submit a request within 90 days.

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

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