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Texas Instruments CD74HCT365E
- Part No.:
- CD74HCT365E
- Manufacturer:
- Texas Instruments
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
CD74HCT365E.pdf
- Description:
- IC BUF NON-INVERT 5.5V 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:875
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Product details
Overview
CD74HCT365E from Texas Instruments is a high-speed CMOS hex non-inverting three-state buffer/line driver with dual active-low output enables (OE1, OE2), 5 V operation (4.5–5.5 V), ±25 mA bus-driver output current, and 8 ns typical propagation delay at 5 V/15 pF. It serves as a bidirectional bus interface or data isolation element in industrial control backplanes and legacy TTL-compatible digital systems.
For engineers reviewing the CD74HCT365E datasheet, CD74HCT365E pinout, CD74HCT365E application, or CD74HCT365E equivalent, this page delivers verified electrical specs, functional mode behavior, package dimensions, real-world use cases, and two validated alternative parts - all grounded in TI's SCHS180D production datasheet (Rev. D, July 2022).
Technical Context
The CD74HCT365E implements six independent non-inverting buffers, each with three-state output control derived from the NOR of OE1 and OE2. Its HCT logic family ensures direct LSTTL input compatibility (VIL ≤ 0.8 V, VIH ≥ 2.0 V) while delivering CMOS-level power efficiency and noise immunity (NIL/NIH = 30% of VCC).
It operates across –55°C to +125°C, supports 15 LSTTL loads per output, and features balanced tPLH/tPHL and transition times - critical for clean signal integrity on shared data buses. The device lacks internal inverters; its outputs are true complements of inputs only when enabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - matches standard 5 V TTL bus rails without level-shifting. |
| Propagation Delay (tPLH/tPHL) | 9 ns max at 5 V/15 pF - enables reliable timing in 30+ MHz bus cycles. |
| Output Drive Current | ±25 mA per pin - drives 15 LSTTL loads or moderate PCB trace capacitance directly. |
| Input Compatibility | LSTTL-logic thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) - interfaces seamlessly with 74LS-series sources. |
| Operating Temperature | –55°C to +125°C - qualified for extended industrial and military-grade environments. |
| Three-State Leakage | ±10 µA max at –55°C to +125°C - prevents unintended bus contention during high-Z state. |
| Quiescent Supply Current | 160 µA max over full temperature range - supports low-static-power system design. |
Pinout & Package
CD74HCT365E uses a 16-pin plastic dual in-line package (PDIP-N), body size 19.30 × 6.35 mm, with through-hole mounting and industry-standard lead pitch (2.54 mm). Pin 1 is located at the top-left corner adjacent to the notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | OE1, OE2 | Active-low three-state enable inputs; both must be low for outputs to drive (NOR logic). |
| 2, 4, 6, 10, 12, 14 | 1A–6A | Non-inverting data inputs - directly connected to upstream logic or microcontroller GPIO. |
| 3, 5, 7, 9, 11, 13 | 1Y–6Y | Buffered, three-state outputs - drive bidirectional buses or isolated signal paths. |
| 8 | GND | Ground reference for all I/O and internal circuitry - requires low-impedance connection. |
| 16 | VCC | Positive supply rail - bypass with 0.1 µF ceramic capacitor placed within 5 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Direct LSTTL input compatibility | Eliminates need for external level shifters when interfacing with 74LS/ALS logic families. |
| High-current bus-driver outputs | ±25 mA sink/source capability sustains signal integrity across long traces or multi-load buses. |
| Dual three-state enable (NOR logic) | Enables hierarchical bus control - e.g., one enable for local subsystem, second for global arbitration. |
| Wide temperature operation | –55°C to +125°C rating supports deployment in unheated enclosures, engine bays, or outdoor infrastructure. |
| Low quiescent power | 160 µA max ICC allows integration into always-on monitoring circuits without thermal penalty. |
Applications
| Industrial PLC Backplane Interface | Legacy System Bus Isolation |
|---|---|
Use Scenario: Isolating CPU address/data bus from modular I/O expansion slots in programmable logic controllers. IC Role / Device Role / Timing Role: Non-inverting three-state buffer providing direction-controlled, contention-free bus access between master and slave modules. Use Value: Enables hot-swap-capable slot architecture using OE1/OE2 for per-slot arbitration without timing skew or bus glitches. |
Use Scenario: Interfacing modern microcontrollers to aging 74LS-based peripheral cards in test equipment or avionics maintenance rigs. IC Role / Device Role / Timing Role: Level-translating bus driver ensuring LSTTL-compatible input thresholds and robust 5 V CMOS output swing. Use Value: Eliminates discrete resistor networks or dedicated translators, reducing BOM count and layout area. |
| Military Data Acquisition Subsystem | Automated Test Equipment (ATE) Signal Routing |
Use Scenario: Buffering analog-to-digital converter (ADC) parallel output lines in ruggedized field-deployable DAQ units. IC Role / Device Role / Timing Role: High-drive, low-propagation-delay interface isolating ADC core from noisy digital backplane signals. Use Value: Maintains sampling fidelity by minimizing setup/hold time violations under –55°C cold-start conditions. |
Use Scenario: Multiplexing multiple DUT (device-under-test) signal lines onto shared ATE measurement channels. IC Role / Device Role / Timing Role: Six-channel three-state gate enabling dynamic reconfiguration of signal paths via FPGA-controlled OE pins. Use Value: Reduces channel count requirements by 6× versus fixed routing, lowering test head complexity and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex non-inverting three-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT244N | Octal (8-channel) vs. hex (6-channel); identical VCC range, timing, and LSTTL compatibility. | Better suited for 8-bit data buses; requires PCB layout change due to different pinout and package footprint. | Select when expanding bus width beyond 6 bits or consolidating multiple CD74HCT365E functions into one IC. |
| CD74HC365E | HC variant: 2–6 V operation, higher VIH/VIL thresholds (3.15 V/1.35 V @ 4.5 V), no LSTTL input compatibility. | Requires external level shifting for LS-family inputs; preferred in mixed-voltage or battery-powered 3.3 V systems. | Choose only if operating outside 4.5–5.5 V or interfacing exclusively with CMOS logic - not a drop-in replacement. |
Compared with SN74HCT244N, CD74HCT365E offers tighter pin-to-bus alignment for 6-bit paths and lower gate count per function; compared with CD74HC365E, it guarantees interoperability with legacy 74LS devices without redesign, making it the sole choice for brownfield TTL bus upgrades.
Availability
CD74HCT365E is available at Aetrix Electronics and suitable for industrial PLC backplanes, legacy system bus isolation, military data acquisition subsystems, and automated test equipment signal routing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HCT365E 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 founded in 1930, designing analog, embedded processing, and logic solutions for industrial, automotive, and aerospace markets.
CD74HCT365E belongs to TI's 74HCT logic family - engineered specifically to replace 74LS devices in existing 5 V systems while delivering CMOS power efficiency, noise immunity, and extended temperature reliability.
FAQ
What is the maximum clock/data rate supported by CD74HCT365E?
The CD74HCT365E is not a clocked device but a combinational buffer. Its 9 ns max propagation delay at 5 V/15 pF supports reliable operation in asynchronous 30+ MHz bus environments. For synchronous systems, maximum data rate depends on system-level timing margins including setup/hold, trace length, and load - not an intrinsic clock frequency rating.
Can CD74HCT365E drive a 50 Ω transmission line directly?
No. CD74HCT365E is designed for bus loading (15 LSTTL inputs, ~150–200 pF), not RF impedance matching. Driving a 50 Ω line would exceed its ±25 mA output rating and cause signal distortion. Use a dedicated line driver (e.g., SN65LVDS1) or series termination for controlled-impedance traces.
Is CD74HCT365E pin-compatible with CD74HC365E?
Yes - CD74HCT365E and CD74HC365E share identical PDIP-16 pinout, pin functions, and logic behavior. However, they differ electrically: CD74HCT365E accepts LSTTL inputs (0.8 V/2.0 V), while CD74HC365E requires CMOS-level inputs (1.35 V/3.15 V @ 4.5 V). Swapping them may cause logic errors without voltage adjustment.
Does CD74HCT365E require external pull-up or pull-down resistors on unused inputs?
Yes. Per TI's layout guidelines, all unused inputs (e.g., spare A/Y pairs or OE pins) must be tied to VCC or GND to prevent floating states that cause increased ICC, noise susceptibility, or undefined outputs. OE1 and OE2 should be pulled high (to VCC via 10 kΩ) unless actively controlled.
What is the thermal resistance (RθJA) of CD74HCT365E in PDIP package?
The junction-to-ambient thermal resistance (RθJA) for CD74HCT365E in the N (PDIP-16) package is 67°C/W, as specified in Section 5.3 of the SCHS180D datasheet. This value assumes standard JEDEC 2-layer board conditions; actual performance improves with added copper pour or airflow.
CD74HCT365E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCT
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 6
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 4mA, 4mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
CD74HCT365E FAQ
1.How can I place an order for CD74HCT365E through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HCT365E 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 CD74HCT365E reliable?
The price and inventory of CD74HCT365E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HCT365E is usually 5 days.
3.What payment methods are accepted for CD74HCT365E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HCT365E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HCT365E?
CD74HCT365E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HCT365E 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 CD74HCT365E?
For technical support, including CD74HCT365E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HCT365E requirements.
6.How does Aetrix verify that CD74HCT365E is sourced from the original manufacturer or authorized distributors?
All CD74HCT365E 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 CD74HCT365E meets industry standards.
7.What is the process for return or replacement of CD74HCT365E?
All CD74HCT365E units undergo pre-shipment inspection (PSI). If there is an issue with CD74HCT365E, 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 CD74HCT365E part is unused and in its original packaging.
Return procedure for CD74HCT365E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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