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Texas Instruments SN74HC368PW
- Part No.:
- SN74HC368PW
- Manufacturer:
- Texas Instruments
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74HC368PW.pdf
- Description:
- IC BUFFER INVERT 6V 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:330
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Product details
Overview
SN74HC368PW from Texas Instruments is a hex inverting buffer and 3-state line driver IC designed for memory address, clock, and bus interface applications. It operates from 2 V to 6 V, delivers ±6 mA output drive at 5 V, exhibits typical propagation delay of 10 ns (VCC = 4.5 V, CL = 50 pF), and draws ≤80 µA ICC. Its active-low output-enable inputs (1OE, 2OE) support dual 4-line + 2-line buffering with high-impedance outputs when disabled.
For engineers reviewing the SN74HC368PW datasheet, SN74HC368PW pinout, SN74HC368PW application, or SN74HC368PW equivalent, key selection criteria include its TSSOP-16 package footprint, inverting logic behavior, 3-state bus-driving capability, low-power CMOS performance, and compatibility with LSTTL load levels (up to 15 units).
Technical Context
The SN74HC368PW implements six independent inverting buffers, each with active-low 3-state control-organized as two groups (Group 1: Y1–Y4, 1OE; Group 2: Y5–Y6, 2OE). Its CMOS design ensures rail-to-rail output swing, input thresholds referenced to VCC/2, and immunity to floating inputs when unused pins are tied to VCC or GND.
It supports bidirectional bus interfacing via controlled enable sequencing, features low input current (≤1 µA max), and maintains stable switching characteristics across 2–6 V supply range-enabling interoperability with mixed-voltage systems including 3.3 V and 5 V logic domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - enables direct interface with 3.3 V and 5 V systems without level shifters |
| Output Drive Strength | ±6 mA at 5 V - sufficient to drive 15 LSTTL loads or terminate short PCB traces |
| Propagation Delay (tpd) | Typ. 10 ns @ VCC = 4.5 V, CL = 50 pF - supports >30 MHz bus toggle rates in buffered paths |
| Quiescent Current (ICC) | ≤80 µA max - suitable for low-power standby modes in battery-backed or energy-sensitive designs |
| Input Leakage Current | ≤1 µA max - prevents unintended logic transitions on high-impedance or long-trace inputs |
| 3-State Enable Timing (ten/tdis) | Typ. 24 ns / 41 ns @ VCC = 6 V - ensures clean bus release and acquisition without contention windows |
| Power Dissipation Capacitance | 35 pF per buffer - allows accurate dynamic power estimation in high-frequency switching scenarios |
Pinout & Package
TSSOP-16 package (5.00 mm × 4.40 mm, 1.2 mm max height), lead-free NiPdAu/Sn finish, moisture sensitivity level 1 (260 °C peak reflow), RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 4, 5, 9, 10 | A1–A6 Inputs | Inverting data inputs - each drives corresponding Y output when OE is asserted |
| 2, 6, 7, 8, 12, 13 | Y1–Y6 Outputs | Inverted, 3-state outputs - high-impedance when respective OE is high |
| 11 | 1OE | Active-low enable for Y1–Y4 - ties all four outputs simultaneously to high-Z or inverted A1–A4 |
| 15 | 2OE | Active-low enable for Y5–Y6 - independently controls final two buffers |
| 16 | VCC | Positive supply - must be bypassed with 0.1 µF ceramic capacitor near pin |
| 8 | GND | Ground reference - shared return path for all I/O and supply currents |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range (2–6 V) | Eliminates need for dedicated voltage regulators in multi-rail systems; supports legacy 5 V and modern 3.3 V logic |
| High-Current 3-State Outputs | Drives up to 15 LSTTL loads directly - reduces external buffer count in memory address/data buses |
| Inverting Logic Function | Provides signal polarity correction without additional gates - simplifies timing alignment in feedback or enable paths |
| Low Input Current (≤1 µA) | Minimizes loading on upstream drivers - preserves signal integrity in fan-out-critical clock distribution networks |
| Controlled Enable Timing | Asymmetric ten/tdis ensures outputs enter high-Z before new data arrives - prevents bus contention during state transitions |
Applications
| Memory Address Buffering | System Clock Distribution |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or Flash memory with bus isolation during DMA cycles. IC Role / Device Role / Timing Role: Inverting 3-state buffer that isolates memory address bus during peripheral access, preventing address corruption. Use Value: Enables clean bus sharing between CPU and DMA controller using OE-controlled high-Z states - eliminates need for discrete bus switches. |
Use Scenario: Distributing a master system clock to multiple synchronous peripherals while maintaining edge integrity. IC Role / Device Role / Timing Role: Low-skew inverting buffer that regenerates clock edges and provides drive strength for fan-out >10. Use Value: Delivers 10 ns typical tpd and ±6 mA drive - sustains <1 ns inter-channel skew across six outputs under 50 pF load. |
| Industrial Bus Interface | Legacy Peripheral Expansion |
|
Use Scenario: Interfacing a 3.3 V FPGA I/O bank to a 5 V RS-485 transceiver enable line and status bus. IC Role / Device Role / Timing Role: Level-tolerant inverting buffer with 3-state control, used to translate and isolate bidirectional control signals. Use Value: Operates reliably across 2–6 V supply - accepts 3.3 V logic inputs and drives 5 V loads without external level shifters. |
Use Scenario: Adding parallel port expansion to an embedded controller with limited GPIO, requiring inverted handshake signaling. IC Role / Device Role / Timing Role: Generates inverted ACK, BUSY, and STROBE signals from MCU GPIOs with bus-hold capability. Use Value: Integrates six independent inverters + 3-state control in one TSSOP-16 - saves 40% board area vs. discrete gate solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex inverting buffer with 3-state output applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT368PW | CMOS input thresholds shifted to TTL-compatible levels (VIH = 2.0 V min); identical pinout and function | Better noise margin in mixed 5 V TTL/CMOS systems; not recommended for pure 3.3 V operation below 4.5 V VCC | Select when interfacing with legacy 5 V TTL outputs or where input noise immunity >2.0 V is required |
| SN74LVC368PW | Lower VCC range (1.65–5.5 V); higher drive (±24 mA); faster tpd (3.5 ns typ @ 3.3 V); different input thresholds | Supports 1.8 V logic domains and higher-speed buses; requires stricter layout for signal integrity | Choose for 1.8 V/3.3 V systems needing higher speed or drive, but verify VIH/VIL compatibility with source devices |
Compared with SN74HC368PW, SN74HCT368PW offers TTL-compatible inputs for robustness in noisy 5 V environments, while SN74LVC368PW delivers superior speed and drive in modern low-voltage systems-neither is pin-compatible without verifying voltage domain alignment and timing margins.
Availability
SN74HC368PW is available at Aetrix Electronics and suitable for memory address buffering, clock distribution, industrial bus interface, and legacy peripheral expansion requiring stable component supply and long-term obsolescence management.
Supply support for SN74HC368PW 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 ICs, with over 50 years of innovation in high-reliability digital logic families.
The SN74HC368PW belongs to TI's 74HC high-speed CMOS logic family, engineered for low-power, wide-voltage-operation buffering and bus driving in industrial, computing, and communications equipment.
FAQ
What is the maximum operating temperature range for the SN74HC368PW?
The SN74HC368PW is rated for operation from –40 °C to +85 °C ambient temperature. This industrial-grade range ensures reliable performance in embedded controllers, motor drives, and instrumentation where thermal cycling occurs. The device's thermal resistance (RθJA = 137.5 °C/W) and junction temperature limit of 150 °C allow safe operation within this envelope under typical PCB copper pour conditions.
Does the SN74HC368PW require external pull-up or pull-down resistors on its inputs?
No, the SN74HC368PW does not require external pull-up or pull-down resistors on its A inputs or OE pins under normal operation. However, TI mandates that all unused inputs be actively tied to VCC or GND to prevent floating states that cause increased ICC and potential oscillation. This is a design requirement-not a datasheet recommendation-and applies to any unconnected A or OE pin in the SN74HC368PW circuit.
Can the SN74HC368PW drive a 50 Ω transmission line directly?
No, the SN74HC368PW is not designed for direct 50 Ω transmission line driving. Its ±6 mA output drive at 5 V yields ~833 Ω effective source impedance - too high for proper 50 Ω termination. For controlled-impedance routing, use the SN74HC368PW to drive a series-terminated line (e.g., 45 Ω resistor at source) or pair it with a dedicated line driver like the SN74LVC1G17 for point-to-point high-speed links.
How does the SN74HC368PW handle simultaneous enable/disable of multiple output groups?
The SN74HC368PW uses two independent active-low enables (1OE for Y1–Y4, 2OE for Y5–Y6), allowing staggered or synchronized 3-state control. When both OE pins transition together, output disable (tdis) and enable (ten) times are matched within 3 ns (max spec difference), ensuring glitch-free bus arbitration. This behavior is verified in TI's switching characteristics table under CL = 50 pF test conditions.
Is the SN74HC368PW pin-compatible with the SN74LS368?
No, the SN74HC368PW is not pin-compatible with the SN74LS368. Although both are hex inverting 3-state buffers in 16-pin packages, the SN74LS368 uses a PDIP-16 or SOIC-16 footprint with different pin assignments (e.g., VCC on pin 14, GND on pin 7), whereas the SN74HC368PW TSSOP-16 places VCC on pin 16 and GND on pin 8. Physical and logical pinouts differ - no drop-in replacement is possible without PCB redesign.
SN74HC368PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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-TSSOP
SN74HC368PW FAQ
1.How can I place an order for SN74HC368PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC368PW 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 SN74HC368PW reliable?
The price and inventory of SN74HC368PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC368PW is usually 5 days.
3.What payment methods are accepted for SN74HC368PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC368PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC368PW?
SN74HC368PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC368PW 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 SN74HC368PW?
For technical support, including SN74HC368PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC368PW requirements.
6.How does Aetrix verify that SN74HC368PW is sourced from the original manufacturer or authorized distributors?
All SN74HC368PW 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 SN74HC368PW meets industry standards.
7.What is the process for return or replacement of SN74HC368PW?
All SN74HC368PW units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC368PW, 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 SN74HC368PW part is unused and in its original packaging.
Return procedure for SN74HC368PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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