Texas Instruments CD74HCT365MT

Overview

CD74HCT365MT from Texas Instruments is a high-speed CMOS hex non-inverting three-state buffer/line driver with dual active-low output enables (OE1, OE2), 4.5 V to 5.5 V operation, ±25 mA bus-driver output current, and 8 ns typical propagation delay at 5 V/15 pF. It serves as a bidirectional bus interface in industrial control backplanes and legacy TTL-compatible data routing systems.

For engineers reviewing the CD74HCT365MT datasheet, CD74HCT365MT pinout, CD74HCT365MT application, or CD74HCT365MT equivalent, this page delivers verified functional mode behavior, LSTTL-input-compatible voltage thresholds, thermal derating limits, SOIC-16 package mechanical dimensions, and validated alternative options for bus buffering in temperature-stressed embedded systems.

Technical Context

The CD74HCT365MT implements six independent non-inverting buffers, each with high-current CMOS outputs capable of driving 15 LSTTL loads. Its dual three-state enable inputs (OE1, OE2) are internally NORed, allowing simultaneous control of all six outputs with active-low logic.

It operates strictly within 4.5 V–5.5 V supply range and guarantees LSTTL-compatible input thresholds: VIH ≥ 2.0 V (min), VIL ≤ 0.8 V (max) at 5 V. Propagation delay is specified at 9 ns (typ) for CL = 15 pF and 38 ns (max) over –55°C to +125°C.

Key Specifications

Pinout & Package

CD74HCT365MT is housed in a 16-pin SOIC (D) package with nominal body size 9.90 mm × 3.90 mm and 1.27 mm lead pitch. The package is RoHS-compliant, moisture sensitivity level 1 (260°C peak reflow), and marked "HCT365M".

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex non-inverting three-state buffer applications.

Compared with CD74HCT365MT, SN74HCT365N offers through-hole flexibility but higher thermal resistance, while CD74HCT365M96 provides identical performance with assured supply chain continuity and automated placement compatibility.

Availability

CD74HCT365MT is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system bus isolation, military data acquisition modules, and automotive engine control subsystems requiring stable component supply across extended temperature ranges.

Supply support for CD74HCT365MT 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 logic families.

The CD74HCT365MT belongs to TI's HCT logic series-designed specifically for seamless integration into 5 V LSTTL systems while delivering CMOS power efficiency and extended temperature resilience.

FAQ

What is the maximum operating temperature range for CD74HCT365MT?

The CD74HCT365MT is rated for continuous operation from –55°C to +125°C. This full military-grade temperature range is validated per TI's characterization testing and applies across all specified electrical parameters including propagation delay, output drive, and three-state leakage. The SOIC-16 package's thermal resistance (RθJA = 73°C/W) supports this rating when mounted on standard FR-4 PCBs with adequate copper pour.

Does CD74HCT365MT support direct connection to 74LS-series logic outputs?

Yes, CD74HCT365MT supports direct connection to 74LS-series logic outputs due to its LSTTL-compatible input thresholds: VIH ≥ 2.0 V (min) and VIL ≤ 0.8 V (max) at VCC = 5 V. This eliminates the need for external pull-up resistors or level-shifting circuitry when receiving signals from standard LS devices, preserving signal integrity and reducing BOM count.

How are the two output enable inputs (OE1 and OE2) functionally combined in CD74HCT365MT?

In CD74HCT365MT, OE1 (pin 1) and OE2 (pin 15) are internally NORed. All six outputs enter high-impedance state unless both OE1 and OE2 are driven low simultaneously. This dual-enable architecture allows coordinated bus arbitration-e.g., one enable may be tied to a system-level chip select while the other responds to local direction control-without external logic gates.

What is the recommended bypass capacitor for CD74HCT365MT?

Texas Instruments specifies a 0.1 µF ceramic capacitor placed as close as possible to the VCC (pin 16) and GND (pin 8) pins of CD74HCT365MT. This minimizes high-frequency supply noise induced by fast output transitions. For systems with mixed-frequency noise sources, paralleling a 1 µF tantalum or ceramic capacitor is acceptable-but the 0.1 µF unit must remain physically adjacent to the IC's power pins.

Is CD74HCT365MT pin-compatible with CD74HC365MT?

No, CD74HCT365MT is not pin-compatible with CD74HC365MT in functional operation despite identical pinout and package. CD74HC365MT operates from 2 V to 6 V and uses CMOS input thresholds (VIH = 3.15 V min at 4.5 V), whereas CD74HCT365MT requires 4.5 V–5.5 V and accepts LSTTL inputs. Swapping them risks incorrect logic interpretation or excessive input current if used in 5 V TTL systems.