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Texas Instruments SN74HC368DT
- Part No.:
- SN74HC368DT
- Manufacturer:
- Texas Instruments
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74HC368DT.pdf
- Description:
- IC BUFFER INVERT 6V 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,930
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Product details
Overview
SN74HC368DT from Texas Instruments is a hex inverting buffer and 3-state line driver IC designed for memory address bus driving, clock distribution, and bidirectional data bus interfacing. It operates from 2 V to 6 V, delivers ±6 mA output drive at 5 V, features typical propagation delay of 10 ns, and consumes ≤80 µA ICC. Its dual 4-line/2-line architecture with active-low OE inputs enables selective bus isolation in embedded control and industrial logic systems.
For engineers reviewing the SN74HC368DT datasheet, SN74HC368DT pinout, SN74HC368DT application, or SN74HC368DT equivalent, this page provides verified functional modes, thermal metrics, switching characteristics under 50 pF load, and validated SOIC-16 package implementation details - all critical for bus contention management and timing-critical 3-state logic design.
Technical Context
The SN74HC368DT implements six independent inverting buffers, each with high-impedance (3-state) outputs controlled by two active-low enable inputs (1OE, 2OE), supporting dual-group bus gating. Its CMOS HCMOS process ensures rail-to-rail input compatibility and low static current across the full 2–6 V supply range.
Each buffer exhibits defined functional behavior: when OE is low, Y = NOT(A); when OE is high, Y = high-Z. Switching performance is characterized at CL = 50 pF, with tpd = 20 ns (typ) at VCC = 4.5 V and TA = 25°C, and disable time (tdis) of 41 ns (max) under same conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - supports mixed-voltage system interfacing and legacy 5 V TTL bus compatibility |
| Output Drive Strength | ±6 mA at 5 V - sufficient to drive 15 LSTTL loads directly without external buffering |
| Propagation Delay (tpd) | 20 ns typical at VCC = 4.5 V, CL = 50 pF - enables reliable operation in sub-50 MHz synchronous bus applications |
| Quiescent Current (ICC) | 80 µA maximum - enables low-power standby in battery-backed or energy-sensitive control modules |
| Input Leakage Current | ±1 µA max - ensures stable logic levels even with high-impedance pull-ups or long PCB traces |
| 3-State Enable Polarity | Active-low (1OE, 2OE) - simplifies direct connection to open-drain microcontroller GPIO or FPGA control signals |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems including PLC I/O modules and motor drives |
Pinout & Package
SN74HC368DT is supplied in a 16-pin SOIC (D) package measuring 9.90 mm × 3.90 mm, with standard 1.27 mm lead pitch and gull-wing terminations suitable for reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | A1–A6 Inputs | Inverting buffer input terminals; accept CMOS- or TTL-level logic signals |
| 2, 4, 6, 10, 12, 14 | Y1–Y6 Outputs | Inverted, 3-state outputs; high-Z when corresponding OE is high |
| 7 | GND | Ground reference for logic and power domains; must be low-impedance |
| 8 | VCC | Positive supply (2–6 V); requires local 0.1 µF ceramic bypass capacitor |
| 15 | 1OE | Active-low enable for Y1–Y4; ties to GND to activate first four buffers |
| 16 | 2OE | Active-low enable for Y5–Y6; independent control enables partial bus gating |
Key Features
| Feature | Design Value |
|---|---|
| Hex inverting 3-state architecture | Dual-group (4+2) output enables allow selective bus segment isolation without full device disable |
| Wide supply voltage range | 2–6 V operation eliminates level-shifting needs between 3.3 V controllers and 5 V peripherals |
| High-current 3-state outputs | ±6 mA drive at 5 V supports direct fanout to multiple LSTTL inputs while maintaining noise margin |
| Low power consumption | 80 µA max ICC enables use in always-on monitoring circuits with minimal quiescent load |
| Controlled switching characteristics | Specified tpd, ten, and tdis at CL = 50 pF ensure predictable timing in synchronous bus designs |
Applications
| Memory Address Bus Driver | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or peripheral chips on a shared bus. IC Role / Device Role / Timing Role: Inverting buffer with 3-state outputs isolates unselected memory banks during read/write cycles to prevent bus contention. Use Value: Enables deterministic address decoding with <20 ns propagation delay and guaranteed high-Z state during chip deselect. |
Use Scenario: Interfacing field I/O signals (e.g., 24 V digital inputs) to a 3.3 V FPGA-based controller via opto-isolated signal conditioning. IC Role / Device Role / Timing Role: Level-translating and bus-driving interface that buffers isolated logic levels before entering the FPGA's input bank. Use Value: Supports mixed-voltage interoperability (2–6 V range) and withstands industrial EMI due to robust CMOS input thresholds. |
| Legacy System Bus Extender | Test Equipment Signal Routing |
|
Use Scenario: Extending an aging 8-bit ISA-style control bus to add new peripheral slots while preserving timing integrity. IC Role / Device Role / Timing Role: Bidirectional bus repeater using paired SN74HC368DT devices - one for direction A→B, another for B→A. Use Value: Delivers consistent 10–25 ns tpd across voltage range, ensuring setup/hold timing margins remain intact after extension. |
Use Scenario: Dynamic routing of test signals (clock, trigger, data) between DUT ports and measurement instruments in automated test fixtures. IC Role / Device Role / Timing Role: 3-state multiplexer substitute enabling software-controlled path selection without mechanical relays. Use Value: Eliminates relay wear-out and bounce; 41 ns max tdis allows sub-25 MHz switching of signal paths under firmware control. |
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 | TTL-compatible input thresholds (VIH = 2.0 V min), identical pinout and function | Better suited for mixed 5 V TTL/CMOS systems where input noise immunity is critical | Select when interfacing legacy 5 V TTL outputs; retains same SOIC-16 footprint |
| 74LCX368MTCX | Lower VCC range (2.0–3.6 V), higher speed (tpd = 5.5 ns typ @ 3.3 V), different pinout | Optimized for 3.3 V-only portable/embedded systems requiring faster bus turnaround | Choose for 3.3 V domains needing sub-10 ns delay; requires PCB layout revision |
Compared with SN74HC368DT, SN74HCT368N offers superior noise immunity with TTL input thresholds but identical 3-state timing, while 74LCX368MTCX delivers faster switching at lower voltage - making SN74HC368DT the optimal balance of voltage flexibility, drive strength, and industrial temperature support.
Availability
SN74HC368DT is available at Aetrix Electronics and suitable for industrial control systems, legacy bus expansion projects, and test equipment signal routing requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for SN74HC368DT 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-grade logic families.
The SN74HC368DT belongs to TI's 74HC high-speed CMOS logic series, engineered for robust 3-state bus driving in memory, clock, and I/O interface applications across industrial, automotive, and communications systems.
FAQ
What is the maximum operating temperature for SN74HC368DT?
The SN74HC368DT is rated for operation from –40°C to +85°C ambient temperature, meeting industrial-grade requirements. This specification is validated per TI's recommended operating conditions and applies to all SOIC-packaged variants including SN74HC368DT. Thermal derating is not required within this range when used with proper PCB copper pour and airflow.
Does SN74HC368DT support 3.3 V logic systems?
Yes, SN74HC368DT fully supports 3.3 V operation: its 2–6 V supply range includes 3.3 V, input thresholds scale with VCC (VIH ≈ 0.7×VCC), and it delivers ±6 mA output drive at 3.3 V. This makes SN74HC368DT suitable for interfacing 3.3 V microcontrollers to 5 V peripherals without level shifters.
How many independent 3-state groups does SN74HC368DT provide?
SN74HC368DT provides two independent 3-state groups: outputs Y1–Y4 are controlled by 1OE, and Y5–Y6 by 2OE. This dual-enable architecture allows partial bus gating - for example, holding Y5–Y6 high-Z while actively driving Y1–Y4 - a capability confirmed in TI's functional mode table and block diagram.
What is the typical propagation delay of SN74HC368DT at 5 V?
At VCC = 5 V, CL = 50 pF, and TA = 25°C, the typical propagation delay (tpd) of SN74HC368DT is 16 ns, with a maximum of 25 ns. This value is specified in TI's SCLS310F datasheet Section 5.5 and reflects worst-case A→Y transition under standard test conditions.
Can SN74HC368DT replace SN74LS368 in existing designs?
SN74HC368DT can replace SN74LS368 in most cases due to pin compatibility, identical function, and improved specs (lower ICC, wider VCC, higher noise immunity), but requires verification of input threshold compatibility: SN74HC368DT VIH = 3.5 V min at 5 V vs. SN74LS368's TTL-compatible 2.0 V. Ensure upstream drivers meet HC input requirements.
SN74HC368DT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SN74HC368DT FAQ
1.How can I place an order for SN74HC368DT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC368DT 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 SN74HC368DT reliable?
The price and inventory of SN74HC368DT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC368DT is usually 5 days.
3.What payment methods are accepted for SN74HC368DT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC368DT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC368DT?
SN74HC368DT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC368DT 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 SN74HC368DT?
For technical support, including SN74HC368DT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC368DT requirements.
6.How does Aetrix verify that SN74HC368DT is sourced from the original manufacturer or authorized distributors?
All SN74HC368DT 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 SN74HC368DT meets industry standards.
7.What is the process for return or replacement of SN74HC368DT?
All SN74HC368DT units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC368DT, 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 SN74HC368DT part is unused and in its original packaging.
Return procedure for SN74HC368DT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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