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NXP Semiconductors 74HCT368N,652
- Part No.:
- 74HCT368N,652
- Manufacturer:
- NXP Semiconductors
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
74HCT368N,652.pdf
- Description:
- IC BUFFER INVERT 5.5V 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,646
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Product details
Overview
74HCT368N,652 from NXP Semiconductors (formerly Philips) is a hex inverting buffer/line driver with 3-state outputs, designed for bus interface applications requiring TTL-compatible input thresholds, 5 V supply operation, and high-impedance output control. It features six independent channels, propagation delay of 13 ns (typ.) at VCC = 4.5 V, output drive capability suitable for bus loading, and operates across −40 °C to +85 °C.
For engineers reviewing the 74HCT368N,652 datasheet, 74HCT368N,652 pinout, 74HCT368N,652 application, or 74HCT368N,652 equivalent, this page delivers verified functional behavior, real-world timing parameters, package mapping to DIP-16, and validated alternatives for bus buffering and bidirectional data path control in industrial logic systems.
Technical Context
The 74HCT368N,652 implements six identical inverting buffer stages, each with an active-low 3-state enable (1OE, 2OE), enabling selective bus isolation. Its HCT logic family ensures TTL-level input compatibility (VIH = 2.0 V min, VIL = 0.8 V max) while maintaining CMOS power efficiency and noise immunity.
Each output drives standard TTL loads and supports bus-oriented designs via high-impedance OFF-state (Z) when OE is HIGH. Propagation delays (tPHL/tPLH), enable/disable times (tPZH/tPHZ), and transition times are fully characterized at 4.5 V and −40 °C to +85 °C per JEDEC 7A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Voltage | 4.5 V to 5.5 V - ensures stable operation with standard 5 V logic rails and tolerance for ripple or droop |
| Propagation Delay (tPHL/tPLH) | 13 ns (typ.) at VCC = 4.5 V - enables reliable timing in 30 MHz bus cycles with margin |
| 3-State Enable Time (tPZH) | 17 ns (typ.) - allows fast bus arbitration and multiplexer switching in shared-data systems |
| Input Capacitance (CI) | 3.5 pF - minimizes capacitive loading on upstream drivers and preserves signal integrity |
| Power Dissipation Cap. (CPD) | 30 pF per buffer - used to calculate dynamic power under varying frequency and load conditions |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial-grade embedded control and instrumentation environments |
Pinout & Package
Dual In-line Package (DIP-16), through-hole mounting, 0.3-inch body width, standard 0.1-inch pin pitch. Pin 1 marked by notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | 1OE, 2OE | Active-low 3-state enable inputs - assert LOW to activate corresponding three buffers (pins 1–3, 15–13) |
| 2, 4, 6, 10, 12, 14 | 1A–6A | Buffer input terminals - accept TTL-compatible logic signals; inverted at outputs |
| 3, 5, 7, 9, 11, 13 | 1Y–6Y | Inverting buffer outputs - drive bus lines with push-pull capability or enter high-Z when OE is HIGH |
| 8 | GND | Ground reference - return path for all internal logic and output currents |
| 16 | VCC | Positive supply - powers all six buffer stages and output drivers at 4.5–5.5 V |
Key Features
| Feature | Design Value |
|---|---|
| Inverting 3-state buffer function | Provides polarity inversion plus bus contention avoidance via controlled high-Z outputs |
| TTL-compatible input thresholds | Guarantees interoperability with legacy 74LS and microcontroller GPIO without level shifting |
| Bus-driver output capability | Drives up to 10 LSTTL loads per output - sufficient for medium-density parallel buses |
| MSI integration level | Contains six independent channels in one IC - reduces board space vs discrete solutions |
Applications
| Industrial PLC I/O Expansion | Legacy Microprocessor Bus Interface |
|---|---|
Use Scenario: Expanding digital I/O capacity in programmable logic controllers using parallel address/data buses. IC Role / Device Role / Timing Role: Inverting 3-state buffer isolating CPU data bus from peripheral modules during read/write cycles. Use Value: Enables clean bus sharing between multiple slave devices with deterministic enable timing (17 ns tPZH) and low propagation skew. | Use Scenario: Interfacing Z80 or 8085-based systems with external memory or peripheral chips. IC Role / Device Role / Timing Role: Level-shifting and bus-driving buffer for address latching and data bus control signals. Use Value: Matches TTL input thresholds and drives 10 LSTTL loads - eliminates need for additional line drivers in vintage computing designs. |
| Test Equipment Signal Routing | Industrial Sensor Data Aggregation |
Use Scenario: Multiplexing sensor outputs onto a shared diagnostic bus in automated test fixtures. IC Role / Device Role / Timing Role: Channel-selectable inverting buffer enabling/disabling sensor signal paths under microcontroller control. Use Value: 3-state outputs prevent signal contention; 13 ns propagation delay supports sub-40 MHz sampling synchronization. | Use Scenario: Consolidating digital status signals from multiple field sensors into a central controller. IC Role / Device Role / Timing Role: Inverting buffer stage normalizing logic polarity and driving long PCB traces to the main controller. Use Value: 3.5 pF input capacitance minimizes loading on sensor output drivers; −40 °C to +85 °C rating ensures reliability in harsh enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT368N | Identical logic function, pinout, and AC/DC specs; manufactured by Texas Instruments | Same bus interface use cases; TI's qualification includes extended burn-in for high-reliability programs | Select when TI-sourced components are required for supply chain diversification or existing TI-design heritage |
| 74VHC368N | Higher speed (tPHL = 5.5 ns typ.), lower CPD (20 pF), but non-TTL-input - VIH = 3.5 V min at VCC = 5 V | Suitable for high-speed digital systems where input compatibility with legacy TTL is not required | Choose for new designs prioritizing speed/power over backward compatibility with 74LS/74F families |
Compared with SN74HCT368N and 74VHC368N, the 74HCT368N,652 offers guaranteed TTL-level input compatibility and industrial temperature support out-of-box, making it optimal for retrofitting legacy systems and cost-sensitive industrial controls where timing margin and interoperability outweigh peak performance.
Availability
74HCT368N,652 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy microprocessor bus interface, and test equipment signal routing requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 74HCT368N,652 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering logic IC development.
The 74HCT368N,652 belongs to NXP's legacy 74HCT logic family, engineered specifically for seamless integration between CMOS logic and TTL-based systems in industrial control, instrumentation, and retro-computing platforms.
FAQ
What is the logic function of the 74HCT368N,652?
The 74HCT368N,652 is a hex inverting buffer/line driver with 3-state outputs. Each of its six channels accepts a logic input (nA), inverts it, and presents the result at the corresponding output (nY) when enabled. When the active-low output enable (nOE) is HIGH, the output enters high-impedance (Z) state. This behavior is confirmed in the function table and logic diagram of the Philips datasheet.
Does the 74HCT368N,652 support 5 V operation?
Yes, the 74HCT368N,652 is specified for VCC = 4.5 V to 5.5 V operation, with full AC and DC performance guaranteed across that range. All timing parameters-including 13 ns typical propagation delay-are characterized at 4.5 V, and the device maintains TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) at 5 V, making it ideal for standard 5 V logic systems.
What package type is used for the 74HCT368N,652?
The 74HCT368N,652 is supplied in a 16-pin plastic dual in-line package (DIP-16) with 0.3-inch body width and through-hole leads. This matches the "N" suffix in the part number and is documented in Philips' "74HC/HCT/HCU/HCMOS Logic Package Outlines" reference document.
How many independent buffer channels does the 74HCT368N,652 contain?
The 74HCT368N,652 contains six independent inverting buffer channels. Pins 2, 4, 6, 10, 12, and 14 serve as inputs (1A–6A); pins 3, 5, 7, 9, 11, and 13 are the corresponding inverted outputs (1Y–6Y); and two shared active-low enables (1OE on pin 1, 2OE on pin 15) control groups of three channels each.
Is the 74HCT368N,652 pin compatible with the 74HCT367?
Yes, the 74HCT368N,652 is pin compatible with the 74HCT367, differing only in output polarity: the 367 provides non-inverting outputs, while the 368 provides inverting outputs. Both share identical pin configuration, enable structure, timing specs, and electrical characteristics - confirmed in the Philips general description stating "The '368' is identical to the '367' but has inverting outputs."
74HCT368N,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 2, 4 (Hex)
- 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:
- Through Hole
- Supplier Device Package:
- 16-DIP
74HCT368N,652 FAQ
1.How can I place an order for 74HCT368N,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT368N,652 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 74HCT368N,652 reliable?
The price and inventory of 74HCT368N,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT368N,652 is usually 5 days.
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5.How can I obtain technical support or documentation for 74HCT368N,652?
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6.How does Aetrix verify that 74HCT368N,652 is sourced from the original manufacturer or authorized distributors?
All 74HCT368N,652 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 74HCT368N,652 meets industry standards.
7.What is the process for return or replacement of 74HCT368N,652?
All 74HCT368N,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT368N,652, 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 74HCT368N,652 part is unused and in its original packaging.
Return procedure for 74HCT368N,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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