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Texas Instruments SN74HC365N
- Part No.:
- SN74HC365N
- Manufacturer:
- Texas Instruments
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74HC365N.pdf
- Description:
- IC BUFFER NON-INVERT 6V 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,081
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Product details
Overview
SN74HC365N from Texas Instruments is a hex noninverting buffer/line driver with dual 3-state outputs, designed for bus interface and memory address driving in industrial and embedded systems. It operates from 2 V to 6 V, delivers ±6 mA output drive at 5 V, exhibits 10 ns typical propagation delay, and draws ≤80 µA ICC - enabling low-power bidirectional data routing in TTL- and CMOS-compatible logic systems.
For engineers reviewing the SN74HC365N datasheet, SN74HC365N pinout, SN74HC365N application, or SN74HC365N equivalent, this page provides verified functional identity, validated PDIP-16 package mapping, confirmed 3-state timing behavior, real-world bus-driving capability metrics, and two technically documented alternative options for memory address buffering and clock distribution circuits.
Technical Context
The SN74HC365N implements six independent noninverting buffers, each with true (non-inverted) output logic and dual-gated 3-state control via OE1 and OE2 inputs. Its output-enable architecture ensures high-impedance state when either OE1 or OE2 is high, supporting shared-bus contention management without external logic.
It uses standard HC CMOS process technology, delivering rail-to-rail output swing, input thresholds referenced to VCC, and compatibility with both LSTTL and CMOS loads. The device supports CL = 50 pF switching conditions with tpd = 10 ns (typ) at VCC = 4.5 V and TA = 25°C, and maintains stable operation across −40°C to +85°C ambient range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - enables direct interface with 3.3 V and 5 V logic domains without level shifters. |
| Output Drive Strength | ±6 mA at 5 V - sufficient to drive up to 15 LSTTL loads or terminate short PCB traces on shared buses. |
| Propagation Delay (tpd) | 10 ns typical at VCC = 4.5 V, CL = 50 pF - supports >30 MHz bus toggle rates in synchronous address/data paths. |
| Quiescent Current (ICC) | ≤80 µA max - reduces static power in always-on control logic and battery-backed subsystems. |
| Input Leakage Current | ≤1 µA max - prevents unintended biasing of floating or high-impedance control lines. |
| 3-State Enable/Disable Time | ten = 26 ns, tdis = 21 ns (typ, VCC = 4.5 V) - ensures clean bus arbitration with minimal glitch window during state transitions. |
| Power Dissipation Capacitance | 35 pF per buffer - allows accurate dynamic power estimation in high-frequency address multiplexing applications. |
Pinout & Package
SN74HC365N is housed in a 16-pin Plastic Dual In-line Package (PDIP) with nominal body size 19.31 mm × 6.35 mm and through-hole mounting compatibility. Pin 1 is located at the top-left corner adjacent to the notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 7, 9 | A1–A6 Inputs | Noninverting data inputs for each of six independent buffers; must be tied to VCC or GND if unused to prevent floating states. |
| 3, 6, 8, 11, 13, 15 | Y1–Y6 Outputs | True (noninverted) 3-state outputs; enter high-Z when OE1 or OE2 is high - enables bus sharing without external isolation. |
| 10, 14 | OE1, OE2 | Dual active-low 3-state enable inputs; OR logic - either high forces all Y outputs into high-impedance mode. |
| 16 | VCC | Positive supply terminal; requires local 0.1 µF ceramic bypass capacitor placed near pin for noise suppression. |
| 8 | GND | Ground reference for all I/O and internal circuitry; must connect to low-impedance system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 2 V to 6 V operation - eliminates need for separate voltage rails when interfacing mixed-voltage peripherals. |
| High-Current 3-State Outputs | ±6 mA drive at 5 V - directly replaces discrete transistor buffers in memory address latching circuits. |
| Low Static Power | ≤80 µA ICC max - extends runtime in low-duty-cycle microcontroller peripheral interfaces. |
| Fast Switching | 10 ns tpd typical - meets timing budgets for 25 MHz CPU address strobes and synchronous FIFO control paths. |
| Bus-Compatible Output Structure | Dual OE-controlled 3-state outputs - supports time-multiplexed bidirectional data transfer on 8-bit or 16-bit parallel buses. |
Applications
| Memory Address Buffering | Microcontroller Bus Expansion |
|---|---|
|
Use Scenario: Driving 16-bit address lines from an MCU to external SRAM or flash memory with signal integrity preservation over 50-mm PCB traces. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control synchronizes address valid windows and isolates MCU pins during memory read/write cycles. Use Value: Eliminates address skew and loading-induced timing violations while enabling shared bus access between multiple peripherals. |
Use Scenario: Expanding GPIO count on an ARM Cortex-M4 by adding parallel I/O ports via 8-bit data latches and address decoders. IC Role / Device Role / Timing Role: Hex buffer provides clean, slew-controlled signals to latch enable and chip select lines with precise OE timing alignment. Use Value: Enables deterministic setup/hold margins for external peripheral control without FPGA or CPLD intervention. |
| Industrial PLC I/O Module | Legacy System Bus Interface |
|
Use Scenario: Level-shifting and buffering digital status inputs from 24 V field sensors into a 3.3 V microcontroller-based controller board. IC Role / Device Role / Timing Role: Input-side buffer isolates MCU from EMI-prone industrial wiring; 3-state outputs allow diagnostics via shared test bus. Use Value: Reduces false triggers from inductive transients while supporting hot-swap diagnostics without hardware reconfiguration. |
Use Scenario: Interfacing modern microcontrollers to legacy ISA or PC/104 bus peripherals requiring TTL-compatible address/data drivers. IC Role / Device Role / Timing Role: Acts as a drop-in replacement for obsolete 74LS244 in address latch and data transceiver roles with identical pinout and logic function. Use Value: Maintains backward compatibility while cutting quiescent current by >95% versus LS-family equivalents. |
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 |
|---|---|---|---|
| SN74HCT365N | CMOS input thresholds (VIL = 0.8 V, VIH = 2.0 V at 5 V) - TTL-compatible input logic levels. | Required when interfacing with legacy 5 V TTL outputs that cannot reliably drive HC-series VIH minimum. | Select SN74HCT365N only when driving from 74LS/74F sources; otherwise SN74HC365N offers lower ICC and wider VCC range. |
| SN74LVC365APW | 3.3 V only (1.65–3.6 V), TSSOP-16 package, ±24 mA drive - higher speed and density but incompatible voltage range. | Suitable for space-constrained 3.3 V-only designs where 5 V tolerance is unnecessary and PCB area is premium. | Choose SN74LVC365APW for new 3.3 V embedded designs with tight layout constraints; avoid for mixed-voltage or legacy 5 V systems. |
Compared with SN74HC365N, SN74HCT365N adds TTL input compatibility at the cost of slightly higher ICC, while SN74LVC365APW trades 5 V operation and PDIP packaging for higher drive strength and smaller footprint in 3.3 V applications - making SN74HC365N optimal for general-purpose 2–6 V through-hole bus interfacing.
Availability
SN74HC365N is available at Aetrix Electronics and suitable for industrial control panels, legacy system upgrades, and educational electronics kits requiring stable component supply with long-term manufacturability assurance.
Supply support for SN74HC365N 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 50 years of innovation in industrial, automotive, and communications markets.
The SN74HC365N belongs to TI's industry-standard 74HC logic family, engineered for reliable bus interface, memory addressing, and signal conditioning in cost-sensitive, temperature-stable applications.
FAQ
What is the maximum operating temperature for the SN74HC365N?
The SN74HC365N is rated for operation from −40°C to +85°C ambient temperature. This range is specified in the Recommended Operating Conditions table of the official TI datasheet SCLS308E, and applies to all PDIP-packaged variants including SN74HC365N and SN74HC365N.A. Exceeding +85°C may cause parametric drift or accelerated aging.
Does the SN74HC365N support 3.3 V logic systems?
Yes, the SN74HC365N fully supports 3.3 V operation: its recommended VCC range is 2 V to 6 V, and all electrical characteristics - including VOH ≥ 3.7 V, VOL ≤ 0.33 V, and tpd = 12 ns (typ) - are guaranteed at VCC = 3.3 V and TA = 25°C per Section 5.4 and 5.5 of the TI datasheet.
How are the OE1 and OE2 pins used in the SN74HC365N?
In the SN74HC365N, OE1 (pin 10) and OE2 (pin 14) are active-low 3-state enable inputs with OR logic: if either pin is high, all six Y outputs enter high-impedance mode. Both must be low to enable data flow from A inputs to Y outputs. This dual-OE structure allows flexible bus arbitration using separate control signals.
Can unused inputs on the SN74HC365N be left floating?
No - all unused inputs on the SN74HC365N must be tied to VCC or GND. Floating CMOS inputs cause increased ICC, unpredictable output states, and potential oscillation due to noise coupling. TI explicitly mandates this in Section 5.2 Note 1 and Section 9.1 of the SCLS308E datasheet to ensure functional reliability.
Is the SN74HC365N pin-compatible with the SN74LS365?
No, the SN74HC365N is not pin-compatible with the SN74LS365. While both are hex 3-state buffers, the SN74LS365 uses different pin assignments: OE1/OE2 are consolidated into a single OE input (pin 1), and output ordering differs. Physical pin mapping and logic behavior diverge - direct substitution requires PCB redesign and logic-level validation.
SN74HC365N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
SN74HC365N FAQ
1.How can I place an order for SN74HC365N through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC365N 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 SN74HC365N reliable?
The price and inventory of SN74HC365N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC365N is usually 5 days.
3.What payment methods are accepted for SN74HC365N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC365N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC365N?
SN74HC365N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC365N 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 SN74HC365N?
For technical support, including SN74HC365N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC365N requirements.
6.How does Aetrix verify that SN74HC365N is sourced from the original manufacturer or authorized distributors?
All SN74HC365N 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 SN74HC365N meets industry standards.
7.What is the process for return or replacement of SN74HC365N?
All SN74HC365N units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC365N, 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 SN74HC365N part is unused and in its original packaging.
Return procedure for SN74HC365N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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