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Texas Instruments SN74HC368NE4
- Part No.:
- SN74HC368NE4
- Manufacturer:
- Texas Instruments
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74HC368NE4.pdf
- Description:
- 6-CH, 2-V TO 6-V INVERTERS WITH
- Quantity:
- Payment:
- Shipping:
Inventory:1,019
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Product details
Overview
SN74HC368NE4 from Texas Instruments is a hex inverting buffer and 3-state line driver IC designed for memory address buffering, bus interfacing, and clock distribution in industrial and embedded systems. It operates from 2 V to 6 V, delivers ±6 mA output drive at 5 V, exhibits typical propagation delay of 20 ns (VCC = 4.5 V), consumes ≤80 µA ICC, and features active-low 3-state enable inputs (1OE, 2OE) for dual 4-line/2-line channel control.
For engineers reviewing the SN74HC368NE4 datasheet, SN74HC368NE4 pinout, SN74HC368NE4 application, or SN74HC368NE4 equivalent, this page provides verified functional modes, thermal metrics for PDIP-16 packaging, switching characteristics under 50 pF load, input/output voltage thresholds across supply range, and real-world design implications for high-density bus driving and memory address isolation.
Technical Context
The SN74HC368NE4 implements six independent inverting buffer/driver channels grouped as two functional blocks: four channels controlled by 1OE and two by 2OE - both active-low enables. Each channel transitions to high-impedance state when its respective OE is high, enabling bidirectional bus arbitration and memory address register isolation without external logic.
Its CMOS HCMOS architecture ensures rail-to-rail output swing, low input current (≤1 µA), and compatibility with LSTTL loads (up to 15 units). The device supports operation from –40°C to +85°C and meets JEDEC JESD78 Class II latch-up immunity, making it suitable for industrial control backplanes and legacy system upgrades requiring 3-state bus drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - supports mixed-voltage system interfacing and battery-backed operation down to 2 V. |
| Output Drive Capability | ±6 mA at VCC = 4.5 V - sufficient to directly drive 15 LSTTL loads or terminate unterminated PCB traces up to 10 cm. |
| Propagation Delay (tpd) | 20 ns typical at VCC = 4.5 V, CL = 50 pF - enables reliable timing in 25 MHz address/data bus applications. |
| Quiescent Current (ICC) | 80 µA max at VCC = 6 V - minimizes standby power in always-on industrial controllers and remote I/O modules. |
| Input Voltage Thresholds | VIH = 3.15 V, VIL = 1.35 V at VCC = 4.5 V - provides 0.8 V noise margin against EMI in noisy factory environments. |
| 3-State Enable Timing | ten = 48 ns, tdis = 41 ns max at VCC = 4.5 V - ensures glitch-free bus handoff during multi-master arbitration cycles. |
| Power Dissipation Capacitance | 35 pF per buffer - allows accurate dynamic power estimation (P = CV²f) for thermal budgeting in dense PCB layouts. |
Pinout & Package
SN74HC368NE4 uses a 16-pin plastic dual in-line package (PDIP-N), 19.31 mm × 6.35 mm body size, with 2.54 mm lead pitch and through-hole mounting. Thermal resistance RθJA = 68.6 °C/W enables operation up to +85°C ambient without forced airflow in standard chassis-mount configurations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 4, 5, 9, 10, 12, 13 | Input (A1–A6) | Active-high logic inputs accepting TTL- or CMOS-level signals; each drives one inverting buffer channel. |
| 2, 6, 7, 8, 11, 15 | Output (Y1–Y6) | Inverting buffered outputs; enter high-impedance state when corresponding OE is high. |
| 14 | 1OE | Active-low enable for Y1–Y4; low = enabled (inverted pass-through), high = Y1–Y4 tri-stated. |
| 16 | 2OE | Active-low enable for Y5–Y6; low = enabled (inverted pass-through), high = Y5–Y6 tri-stated. |
| 16 | VCC | Positive supply terminal (2–6 V); requires local 0.1 µF ceramic bypass capacitor per device. |
| 8 | GND | Ground reference for all inputs, outputs, and internal logic; must connect to low-impedance system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Hex inverting 3-state architecture | Dual enable control (1OE/2OE) allows independent gating of 4-line and 2-line groups - simplifies address/data bus segmentation in microcontroller peripherals. |
| Rail-to-rail CMOS output swing | VOH ≥ 4.4 V and VOL ≤ 0.26 V at VCC = 4.5 V, IO = ±6 mA - ensures full logic level compatibility with downstream 5 V TTL and CMOS receivers. |
| Low input leakage current | II ≤ 1 µA max - prevents unintended logic state drift on unterminated inputs in low-power sleep modes. |
| Controlled transition times | tt ≤ 15 ns at VCC = 4.5 V - limits simultaneous switching noise (SSN) and reduces EMI emissions in compact industrial enclosures. |
| High noise immunity | VIH/VIL thresholds provide ≥0.8 V DC noise margin at 4.5 V supply - maintains reliable operation near motor drives or relay coils. |
Applications
| Memory Address Buffering | Industrial Bus Interface |
|---|---|
|
Use Scenario: Isolating microcontroller address lines from multiple peripheral chips sharing a common data/address bus. IC Role / Device Role / Timing Role: Inverting 3-state buffer that enables/disables address signal routing based on chip-select strobes. Use Value: Prevents bus contention during peripheral access; eliminates need for discrete pull-up resistors or additional logic gates. |
Use Scenario: Driving RS-485 transceiver enable lines and direction control in programmable logic controller (PLC) backplane modules. IC Role / Device Role / Timing Role: Level-shifting and current-boosting interface between low-drive MCU GPIO and high-threshold bus transceivers. Use Value: Ensures clean, fast enable/disable edges (<48 ns) critical for deterministic half-duplex RS-485 timing compliance. |
| Legacy System Upgrade | Test Equipment Signal Conditioning |
|
Use Scenario: Replacing obsolete 74LS368 in aging test fixtures requiring backward-compatible pinout and function. IC Role / Device Role / Timing Role: Drop-in HCMOS upgrade delivering identical logic behavior with lower power and higher noise immunity. Use Value: Extends service life of capital equipment without PCB redesign; reduces thermal load in air-cooled rack-mounted testers. |
Use Scenario: Conditioning digital trigger signals from FPGA-based pattern generators before feeding to analog measurement subsystems. IC Role / Device Role / Timing Role: Inverting buffer with precise edge control and 3-state capability for synchronized signal gating. Use Value: Eliminates ground bounce-induced jitter via controlled slew rate and low-output impedance (≤35 Ω). |
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-input compatible (VIH = 2 V min), slightly higher ICC (160 µA max), same pinout and timing. | Better suited for direct interfacing with legacy 5 V TTL outputs without level shifters. | Select SN74HCT368N when driving from 74LS/74F series logic; otherwise prefer SN74HC368NE4 for pure CMOS systems. |
| 74AC368PC | Faster tpd (11 ns typ at 5 V), higher output drive (±24 mA), but wider supply range (2–6 V) and no guaranteed 2 V operation. | Required where sub-20 ns timing margins or heavy capacitive loads (>100 pF) exist. | Choose 74AC368PC only if speed or drive strength outweighs quiescent power concerns (ICC = 40 µA typ vs. 8 µA for HC). |
Compared with SN74HCT368N and 74AC368PC, SN74HC368NE4 offers optimal balance of ultra-low static power, robust noise margins at 2 V–6 V, and proven reliability in long-lifecycle industrial deployments - making it the preferred choice for cost-sensitive, thermally constrained, or mixed-voltage embedded designs.
Availability
SN74HC368NE4 is available at Aetrix Electronics and suitable for industrial control backplanes, legacy system upgrades, and test equipment signal conditioning requiring stable component supply and long-term manufacturing continuity.
Supply support for SN74HC368NE4 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 industrial-grade product experience.
The SN74HC368NE4 belongs to TI's industry-standard 74HC logic family, engineered for high-noise-immunity, low-power, and pin-compatible replacement of legacy TTL devices in mission-critical infrastructure.
FAQ
What is the maximum operating temperature for SN74HC368NE4?
The SN74HC368NE4 is rated for operation from –40°C to +85°C ambient temperature. Its PDIP package exhibits a junction-to-ambient thermal resistance (RθJA) of 68.6 °C/W, allowing safe operation at full load within this range when mounted on standard FR-4 PCBs with adequate copper area. Derating is not required below +85°C per TI's published specifications.
Does SN74HC368NE4 support 3.3 V logic systems?
Yes, SN74HC368NE4 fully supports 3.3 V operation: VIH is guaranteed ≥2.0 V and VIL ≤0.8 V at VCC = 3.3 V, providing >0.6 V noise margin. Its output VOH ≥3.1 V and VOL ≤0.35 V at IOL = 6 mA ensure reliable interfacing with 3.3 V CMOS receivers without level translation.
How does the dual enable structure of SN74HC368NE4 improve system design?
The SN74HC368NE4's separate 1OE (pins 1, 14) and 2OE (pins 2, 16) inputs allow independent control of four buffers (Y1–Y4) and two buffers (Y5–Y6). This enables selective bus partitioning - e.g., isolating memory-mapped I/O while keeping serial interface lines active - reducing software overhead and eliminating external gating logic.
Can SN74HC368NE4 drive 50 Ω transmission lines directly?
No, SN74HC368NE4 is not designed for direct 50 Ω line driving: its output impedance is ~35 Ω (derived from VOL/IO), causing mismatch and reflections. For controlled-impedance traces, use series termination (e.g., 15 Ω resistor) or dedicated line drivers like SN65LVDS1. The SN74HC368NE4 targets board-level bus loading (≤15 LSTTL), not RF interconnects.
Is SN74HC368NE4 RoHS compliant?
Yes, SN74HC368NE4 is RoHS compliant with lead finish NIPDAU (nickel/palladium/gold), as confirmed in TI's Package Option Addendum. It meets EU Directive 2011/65/EU and contains ≤0.1% lead by weight in homogeneous materials, with full traceability documentation available upon request.
SN74HC368NE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 2, 4
- 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
SN74HC368NE4 FAQ
1.How can I place an order for SN74HC368NE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC368NE4 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 SN74HC368NE4 reliable?
The price and inventory of SN74HC368NE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC368NE4 is usually 5 days.
3.What payment methods are accepted for SN74HC368NE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC368NE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC368NE4?
SN74HC368NE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC368NE4 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 SN74HC368NE4?
For technical support, including SN74HC368NE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC368NE4 requirements.
6.How does Aetrix verify that SN74HC368NE4 is sourced from the original manufacturer or authorized distributors?
All SN74HC368NE4 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 SN74HC368NE4 meets industry standards.
7.What is the process for return or replacement of SN74HC368NE4?
All SN74HC368NE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC368NE4, 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 SN74HC368NE4 part is unused and in its original packaging.
Return procedure for SN74HC368NE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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