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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Nexperia USA Inc. 74HCT368D,653

Name: 74HCT368D,653
Brand: Nexperia USA Inc.
SKU: 74HCT368D,653
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HCT368D,653

Manufacturer:: Nexperia USA Inc.

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: 74HCT368D,653.pdf

Description:: IC BUFFER INVERT 5.5V 16SO

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Product details

Overview

74HCT368D,653 from Nexperia is a hex inverting 3-state buffer/line driver in SO16 package, operating at 4.5–5.5 V supply, with TTL-compatible inputs, 13 ns typical propagation delay at 4.5 V, and ±6 mA output drive capability-used for bidirectional bus interfacing in industrial control backplanes.

For engineers reviewing the 74HCT368D,653 datasheet, 74HCT368D,653 pinout, 74HCT368D,653 application, or 74HCT368D,653 equivalent, key selection criteria include TTL-level input compatibility, 3-state enable timing (t_en/t_dis ≤ 53 ns), thermal performance up to +125 °C, and SO16 package footprint compatibility with legacy 74-series layouts.

Technical Context

This device implements six independent inverting buffers, each with active-low 3-state enable (1OE, 2OE) controlling two outputs per group. Output states are strictly defined as HIGH, LOW, or high-impedance OFF-no internal pull-ups or latching behavior.

Input clamping diodes allow safe interfacing to voltages exceeding V_CC when used with current-limiting resistors. Static and dynamic parameters-including VIH/VIL thresholds, VOH/VOL levels, and t_pd/t_en/t_dis-are fully specified across -40 °C to +125 °C and validated per JEDEC JESD7A and JESD8C standards.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5–5.5 V - matches standard 5 V TTL systems without level-shifting
Input Logic Type	TTL-compatible - accepts 2.0 V min HIGH and 0.8 V max LOW, eliminating external translators
Propagation Delay	13 ns typ @ 4.5 V - enables reliable operation in 30 MHz bus environments
Output Drive	±6 mA @ V_CC = 4.5 V - sufficient to drive 50 pF loads with <15 ns transition times
Enable/Disable Time	35–53 ns max - ensures clean bus arbitration without contention glitches
Operating Temperature	-40 °C to +125 °C - qualified for under-hood industrial and motor-control applications
ESD Protection	HBM >2000 V, CDM >1000 V - withstands handling and board-level ESD events

Pinout & Package

74HCT368D,653 uses the SOT109-1 (SO16) plastic small outline package: 16-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, JEDEC MS-012 compliant.

Pin/Terminal	Circuit Role	Design Meaning
1, 15	1OE, 2OE	Active-low 3-state enable inputs - each controls three outputs (1Y–3Y on 1OE; 4Y–6Y on 2OE)
2, 4, 6, 10, 12, 14	1A–6A	Inverting data inputs - logic HIGH yields LOW output; all inputs tolerate >V_CC with series resistor
3, 5, 7, 9, 11, 13	1Y–6Y	Inverting 3-state outputs - HIGH/LOW when enabled; high-Z when OE = HIGH
8	GND	Ground reference - must be low-inductance connection to minimize switching noise
16	V_CC	Positive supply - requires local 100 nF ceramic decoupling within 5 mm of pin

Key Features

Feature	Design Value
TTL-compatible input thresholds	VIH = 2.0 V min, VIL = 0.8 V max - interoperable with legacy 74LS and microcontroller GPIOs without level shifters
Clamped inputs with diode protection	Allows safe interface to signals up to V_CC + 0.5 V using external current-limiting resistors
Guaranteed 3-state isolation	IOZ ≤ ±10 μA at V_CC = 5.5 V - prevents bus leakage during disable, critical for multi-driver systems
High noise immunity	Typical noise margin >1.0 V at V_CC = 5 V - suppresses EMI-induced false triggering in noisy industrial environments
JEDEC-compliant latch-up immunity	Exceeds 100 mA per JESD78 Class II Level B - survives transient overvoltage events without destructive latch-up

Applications

Industrial PLC Backplane

Legacy Bus Isolation

Use Scenario: Bidirectional data routing between CPU and I/O modules on a 5 V ISA-style backplane with shared address/data lines.

IC Role / Device Role / Timing Role: Inverting 3-state buffer isolating CPU writes from peripheral reads; OE signals synchronized to bus grant timing.

Use Value: Enables deterministic bus arbitration with <53 ns enable/disable latency, preventing signal contention during mode transitions.

Use Scenario: Interfacing modern microcontrollers to legacy 74LS-based peripheral cards requiring TTL-level drive and strict timing.

IC Role / Device Role / Timing Role: Level-translating buffer providing 5 V TTL-compatible outputs while accepting 3.3 V logic via clamped inputs.

Use Value: Eliminates need for discrete level-shifters; VIH/VIL specs ensure robust recognition of 3.3 V GPIO outputs as valid TTL logic.

Motor Control Interface

Test Equipment Signal Conditioning

Use Scenario: Driving optocoupler inputs for isolated gate drivers in 3-phase inverter control boards operating at 125 °C ambient.

IC Role / Device Role / Timing Role: Inverting buffer translating MCU PWM outputs to inverted logic for complementary FET control; 3-state used during fault shutdown.

Use Value: Full -40 °C to +125 °C qualification and 6 mA drive ensure reliable optocoupler LED biasing across thermal extremes.

Use Scenario: Signal conditioning stage in automated test equipment where multiple DUTs share a common digital stimulus bus.

IC Role / Device Role / Timing Role: 3-state buffer enabling one instrument channel to drive the bus while others remain high-Z to avoid loading.

Use Value: Low output capacitance (30 pF CPD) and fast transition times (<18 ns) preserve signal integrity at 20+ MHz test frequencies.

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
74HCT240D,653	Octal (8-channel), non-inverting/inverting dual configuration; higher ICC (160 μA max)	Supports wider bus widths; lacks pin-for-pin compatibility due to different pinout and enable structure	Select when 8-bit buffering is required and layout allows re-routing; not drop-in for 6-signal paths
SN74HCT368N	DIP-16 package; identical electrical specs but larger footprint and no surface-mount thermal performance	Suitable only for through-hole prototyping or legacy repair; not rated for +125 °C continuous operation	Choose only for hand-soldered lab setups; avoid in production or thermally constrained designs

Compared with 74HCT368D,653, the 74HCT240D offers greater channel count at the cost of layout flexibility, while SN74HCT368N sacrifices thermal reliability and density for manual assembly convenience-neither replicates the SO16 + 125 °C + 6-channel balance of the original.

Availability

74HCT368D,653 is available at Aetrix Electronics and suitable for industrial PLC backplanes, motor control interfaces, legacy bus isolation, and test equipment signal conditioning requiring stable component supply across extended temperature ranges.

Supply support for 74HCT368D,653 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 specializing in high-performance, high-reliability logic, analog, and discrete components for automotive, industrial, and consumer applications.

The 74HCT368 belongs to Nexperia's industry-standard 74HCT logic family, designed specifically for seamless integration into 5 V TTL systems requiring robust noise immunity, wide temperature operation, and JEDEC-compliant reliability.

FAQ

What is the maximum clock frequency supported by 74HCT368D,653?

The device has no internal clock; it is asynchronous. Its usable frequency limit is determined by propagation delay (13 ns typ) and load capacitance. With 15 pF load, it reliably supports bus toggle rates up to ~30 MHz, verified by t_pd, t_en, and t_dis specifications across -40 °C to +125 °C.

Can 74HCT368D,653 interface directly with 3.3 V microcontrollers?

Yes-its TTL-compatible inputs accept 3.3 V logic HIGH (VIH min = 2.0 V) and LOW (VIL max = 0.8 V). Input clamping diodes permit safe operation even if 3.3 V signals exceed V_CC, provided current-limiting resistors are used per datasheet Section 1.

Is 74HCT368D,653 qualified for automotive applications?

No-this part is not AEC-Q100 qualified. It is rated for industrial temperature (-40 °C to +125 °C) but lacks automotive-specific stress testing, failure analysis, and PPAP documentation. Nexperia offers automotive-grade variants (e.g., 74HCT368-Q100) for such use cases.

How does the 3-state enable timing affect bus arbitration?

With t_en ≤ 53 ns and t_dis ≤ 53 ns (max at +125 °C), the device ensures minimal bus contention windows during enable/disable transitions. This allows precise synchronization with bus grant signals in multi-master systems, preventing data corruption during handoff.

74HCT368D,653 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74HCT

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

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:: Surface Mount

Supplier Device Package:: 16-SO

74HCT368D,653 FAQ

1.How can I place an order for 74HCT368D,653 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HCT368D,653 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 74HCT368D,653 reliable?

The price and inventory of 74HCT368D,653 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT368D,653 is usually 5 days.

3.What payment methods are accepted for 74HCT368D,653?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT368D,653 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HCT368D,653?

74HCT368D,653 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HCT368D,653 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 74HCT368D,653?

For technical support, including 74HCT368D,653 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT368D,653 requirements.

6.How does Aetrix verify that 74HCT368D,653 is sourced from the original manufacturer or authorized distributors?

All 74HCT368D,653 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 74HCT368D,653 meets industry standards.

7.What is the process for return or replacement of 74HCT368D,653?

All 74HCT368D,653 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT368D,653, 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 74HCT368D,653 part is unused and in its original packaging.

Return procedure for 74HCT368D,653:

1.Submit a request within 90 days.

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

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