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NXP Semiconductors 74HCT365DB,112
- Part No.:
- 74HCT365DB,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT365DB,112.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,979
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Product details
Overview
74HCT365DB,112 from Nexperia is a hex non-inverting 3-state buffer/line driver with TTL-compatible inputs and CMOS outputs, operating from 4.5 V to 5.5 V supply. It features two independent output-enable inputs (OE1, OE2), six bidirectional data paths (1A–6A / 1Y–6Y), and supports high-impedance bus isolation in industrial control and digital interface applications.
For engineers reviewing the 74HCT365DB,112 datasheet, 74HCT365DB,112 pinout, 74HCT365DB,112 application, or 74HCT365DB,112 equivalent, this device is selected for bus buffering where TTL-level input compatibility, low static current (<160 μA at +125 °C), fast enable/disable timing (≤53 ns disable time), and SO16 package thermal robustness are required.
Technical Context
The 74HCT365DB,112 implements six independent non-inverting buffers, each with separate input and output terminals and shared 3-state control via two active-low OE pins (OE1 controls outputs 1Y–3Y; OE2 controls 4Y–6Y). Its TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) ensure direct interfacing with legacy 5 V logic families without level-shifting.
It uses standard CMOS silicon process with input clamp diodes enabling safe overvoltage tolerance when used with current-limiting resistors. The device is specified across -40 °C to +125 °C and exhibits propagation delay ≤38 ns (nA→nY, VCC = 4.5 V), enable time ≤53 ns, and disable time ≤53 ns under worst-case temperature and voltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL systems and stable operation across industrial temperature range. |
| Input Logic Type | TTL-compatible - VIH ≥ 2.0 V, VIL ≤ 0.8 V enables direct connection to 74LS/74F series without translation. |
| Output Drive | ±6.0 mA (VCC = 4.5 V) - Sufficient to drive 50 pF loads and standard CMOS/TTL fan-out (≥10) on PCB traces. |
| Propagation Delay | ≤38 ns (max, -40 °C to +125 °C) - Supports reliable operation up to ~10 MHz bus rates with margin. |
| 3-State Enable Time | ≤53 ns (max, -40 °C to +125 °C) - Enables precise timing control in multiplexed address/data bus applications. |
| Static Supply Current | ≤160 μA (max, VCC = 5.5 V, +125 °C) - Minimizes quiescent power in always-on industrial subsystems. |
| Operating Temperature | -40 °C to +125 °C - Qualified for extended-range industrial and automotive under-hood environments. |
Pinout & Package
74HCT365DB,112 is supplied in SO16 (SOT109-1) plastic small outline package: 16-pin, 3.9 mm body width, 1.27 mm pitch, gull-wing leads. Thermal resistance θJA = 80 K/W (typical), suitable for reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE1) | Output enable 1 (active LOW) | Controls high-impedance state of outputs 1Y, 2Y, 3Y - asserted LOW enables all three outputs simultaneously. |
| 2 (1A) | Data input 1 | Non-inverting input for first buffer channel - drives 1Y with TTL-compatible threshold. |
| 3 (1Y) | Data output 1 | Buffered, 3-state output corresponding to 1A - enters Z-state when OE1 = HIGH. |
| 4 (2A) | Data input 2 | Non-inverting input for second buffer channel - electrically isolated from other inputs. |
| 5 (2Y) | Data output 2 | Buffered, 3-state output corresponding to 2A - shares OE1 control with 1Y and 3Y. |
| 6 (3A) | Data input 3 | Non-inverting input for third buffer channel - completes first OE1 group (1Y–3Y). |
| 7 (3Y) | Data output 3 | Buffered, 3-state output corresponding to 3A - enables grouped bus control for 3-bit signals. |
| 8 (GND) | Ground reference | 0 V return path for all internal circuitry and I/O - must be low-inductance connection in noise-sensitive designs. |
| 9 (4Y) | Data output 4 | Buffered, 3-state output controlled by OE2 - forms first output of second 3-bit group (4Y–6Y). |
| 10 (4A) | Data input 4 | Non-inverting input for fourth buffer channel - electrically isolated and independently controllable. |
| 11 (5Y) | Data output 5 | Buffered, 3-state output corresponding to 5A - shares OE2 with 4Y and 6Y for coordinated enable. |
| 12 (5A) | Data input 5 | Non-inverting input for fifth buffer channel - completes middle of second OE2 group. |
| 13 (6Y) | Data output 6 | Buffered, 3-state output corresponding to 6A - final output in second 3-bit group. |
| 14 (6A) | Data input 6 | Non-inverting input for sixth buffer channel - enables full 6-bit parallel buffering capability. |
| 15 (OE2) | Output enable 2 (active LOW) | Controls high-impedance state of outputs 4Y, 5Y, 6Y - allows dual-bank bus isolation. |
| 16 (VCC) | Positive supply | +4.5 V to +5.5 V power rail - decoupling capacitor (100 nF ceramic) required within 10 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V - eliminates need for external level shifters when interfacing with 74LS or microcontroller GPIOs. |
| Dual 3-state control groups | OE1 (pins 1, 3Y) and OE2 (pin 15, 6Y) independently manage two 3-bit output banks - enables flexible bus segmentation in multi-peripheral systems. |
| High noise immunity | Typical noise margin >1.0 V at VCC = 5 V - ensures reliable operation in electrically noisy industrial enclosures with EFT/burst immunity. |
| Input clamp diodes | Integrated diodes allow safe interface to voltages exceeding VCC when used with series current-limiting resistors - simplifies mixed-voltage signal routing. |
| Extended temperature range | Specified from -40 °C to +125 °C - supports deployment in motor drives, PLC I/O modules, and outdoor telecom equipment. |
Applications
| Industrial Bus Buffering | Microcontroller I/O Expansion |
|---|---|
|
Use Scenario: Isolating and driving 6-bit address/data lines between a PLC CPU and multiple peripheral modules on a shared backplane bus. IC Role / Device Role / Timing Role: Hex non-inverting buffer with dual 3-state enables - provides direction-controlled signal integrity and prevents bus contention during module hot-swap. Use Value: Enables deterministic bus arbitration using OE1/OE2 timing (≤53 ns disable), reducing setup/hold violations in 10 MHz synchronous backplane protocols. |
Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU to drive six discrete LED indicators and three opto-isolated relay drivers. IC Role / Device Role / Timing Role: Level-translating buffer with TTL-compatible inputs - accepts 3.3 V MCU outputs while driving 5 V indicator circuits with ±6 mA sink/source. Use Value: Eliminates need for six discrete transistors or dedicated level shifters, reducing BOM cost and PCB area by >40% versus discrete solutions. |
| Legacy System Interface | Test Equipment Signal Conditioning |
|
Use Scenario: Interfacing modern FPGA-based test controller to aging 74LS-based instrumentation hardware requiring 5 V TTL signaling. IC Role / Device Role / Timing Role: TTL-to-CMOS translator and bus driver - matches LS input thresholds while providing CMOS output drive strength and noise margin. Use Value: Achieves <10 ns timing skew across all six channels, preserving setup/hold margins in 20 MHz control bus timing budgets. |
Use Scenario: Conditioning digital stimulus signals in automated test equipment (ATE) before injection into DUTs with strict input impedance requirements. IC Role / Device Role / Timing Role: Low-skew, 3-state line driver - isolates ATE pattern generator from DUT capacitance during idle periods to prevent signal degradation. Use Value: Reduces output rise/fall time variation to <3 ns across channels, ensuring sub-nanosecond edge alignment critical for high-speed parametric testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT365D,112 | Same die, identical electrical specs, but in SO16 package without 'B' suffix - no functional difference; 'B' denotes tape-and-reel packaging variant. | No application impact - pin-compatible, same thermal and electrical behavior; differs only in packaging format and reel orientation. | Select when standard SO16 tape-and-reel is preferred over DB variant's specific reel configuration for SMT placement optimization. |
| SN74HCT365N | Through-hole PDIP-16 package; wider body (6.35 mm), higher θJA (~100 K/W); identical logic and DC specs but slower max speed due to parasitic capacitance. | Suitable only for prototyping or low-frequency (<5 MHz) applications where manual assembly or socketing is required. | Choose only for breadboard evaluation or legacy through-hole production - not recommended for new designs targeting >10 MHz or thermal-constrained layouts. |
Compared with 74HCT365D,112, the 74HCT365DB,112 offers identical performance in a functionally equivalent package variant optimized for high-volume SMT, while SN74HCT365N trades miniaturization and speed for mechanical serviceability - making the DB variant optimal for space- and timing-critical industrial PCBs.
Availability
74HCT365DB,112 is available at Aetrix Electronics and suitable for industrial bus buffering, microcontroller I/O expansion, legacy system interface, and test equipment signal conditioning requiring stable component supply and long-term lifecycle support.
Supply support for 74HCT365DB,112 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
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions with focus on efficiency, reliability, and sustainability in industrial, automotive, and computing markets.
The 74HCT365DB,112 belongs to Nexperia's 74HCT logic family - engineered for robust 5 V TTL interoperability, low-power operation, and extended temperature resilience in harsh-environment embedded systems.
FAQ
What is the maximum clock frequency supported by the 74HCT365DB,112?
The 74HCT365DB,112 does not operate as a clocked device but as a combinatorial buffer. Its usable signal bandwidth is determined by propagation delay (≤38 ns max) and transition time (≤18 ns max), supporting reliable data rates up to ~10 MHz in bus applications with appropriate trace termination and load capacitance ≤50 pF.
Can OE1 and OE2 be tied together for single-enable operation?
Yes - OE1 and OE2 may be connected to a common control signal to enable all six outputs simultaneously. This reduces control pin count but eliminates independent bank isolation. Ensure the combined load remains within the driving capability of the source (e.g., MCU GPIO capable of sinking ≥200 μA at 0.4 V).
Is the 74HCT365DB,112 qualified for automotive applications?
No - the 74HCT365DB,112 is specified for industrial temperature range (-40 °C to +125 °C) but is not AEC-Q100 qualified. For automotive use, Nexperia offers the pin-compatible 74HCT365DB112-Q100 variant with full automotive qualification and PPAP documentation.
Does the device require external pull-up or pull-down resistors on unused inputs?
Unused inputs must be terminated to VCC or GND to prevent floating states that increase ICC and cause erratic output behavior. Nexperia recommends tying unused A-inputs directly to VCC or GND; OE pins should be held LOW (enabled) or HIGH (disabled) as needed - no pull-up/down resistors required due to internal clamping diodes.
74HCT365DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- 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:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
74HCT365DB,112 FAQ
1.How can I place an order for 74HCT365DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT365DB,112 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 74HCT365DB,112 reliable?
The price and inventory of 74HCT365DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT365DB,112 is usually 5 days.
3.What payment methods are accepted for 74HCT365DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT365DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT365DB,112?
74HCT365DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT365DB,112 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 74HCT365DB,112?
For technical support, including 74HCT365DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT365DB,112 requirements.
6.How does Aetrix verify that 74HCT365DB,112 is sourced from the original manufacturer or authorized distributors?
All 74HCT365DB,112 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 74HCT365DB,112 meets industry standards.
7.What is the process for return or replacement of 74HCT365DB,112?
All 74HCT365DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT365DB,112, 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 74HCT365DB,112 part is unused and in its original packaging.
Return procedure for 74HCT365DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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