Texas Instruments CD74HC365MT

Overview

CD74HC365MT from Texas Instruments is a high-speed CMOS hex non-inverting three-state buffer with dual active-low output enables (OE1, OE2), 6-channel bus driver capability, ±25 mA output drive per pin, 8 ns typical propagation delay at 5 V/15 pF, and operation across –55°C to +125°C for industrial and aerospace signal routing applications.

For engineers reviewing the CD74HC365MT datasheet, CD74HC365MT pinout, CD74HC365MT application, or CD74HC365MT equivalent, this page delivers verified electrical specs, SOIC-16 package mapping, functional mode behavior, real-world use cases in bus isolation and level translation, and two validated alternative parts with precise technical and application distinctions.

Technical Context

The CD74HC365MT implements six independent non-inverting buffer gates, each with high-current CMOS outputs capable of driving up to 15 LSTTL loads. Its dual three-state enable inputs (OE1, OE2) are internally NORed-both must be low to activate all outputs; either high forces all six outputs into high-impedance state.

It belongs to the HC logic family, supporting 2 V–6 V supply operation with CMOS input thresholds (VIH = 3.15 V min at VCC = 4.5 V), 10 µA max input leakage, and 80 µA max ICC over temperature. Propagation delay is load- and voltage-dependent: 8 ns typ at VCC = 5 V, CL = 15 pF; 18 ns typ at VCC = 6 V, CL = 15 pF.

Key Specifications

Pinout & Package

CD74HC365MT is supplied in a 16-pin SOIC (D) package with 9.90 mm × 3.90 mm body size, 1.27 mm pitch, and gull-wing leads. It complies with JEDEC MS-012 and RoHS requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC244N and CD74HC365M96, the CD74HC365MT offers exact 6-channel matching with dual-NOR enable logic in SOIC-16, making it optimal for space-constrained 6-bit bus isolation where pin compatibility and thermal performance (–55°C to +125°C) are critical.

Availability

CD74HC365MT is available at Aetrix Electronics and suitable for industrial bus isolation, microcontroller GPIO expansion, aerospace data acquisition, and legacy system interface applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CD74HC365MT 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 decades of heritage in high-reliability logic families including HC, HCT, and AHC series.

The CD74HC365MT belongs to TI's CD74HC logic portfolio, designed for robust, low-power, high-speed digital interfacing in harsh-environment systems where wide temperature operation and noise immunity are mandatory.

FAQ

What is the function of OE1 and OE2 on the CD74HC365MT?

The CD74HC365MT features two active-low output enable inputs: OE1 (pin 1) and OE2 (pin 15). These are internally NORed, meaning all six outputs go to high-impedance state if either OE1 or OE2 is high; only when both are low do the 1Y–6Y outputs actively drive their respective 1A–6A inputs. This architecture simplifies control logic in systems requiring coordinated bus release.

Can the CD74HC365MT operate at 3.3 V supply voltage?

Yes, the CD74HC365MT is fully specified for 2 V to 6 V operation. At VCC = 3.3 V, it maintains CMOS-compatible input thresholds (VIH ≥ 2.31 V, VIL ≤ 1.1 V), 10 ns typical propagation delay (CL = 15 pF), and ±20 mA output drive - making it ideal for interfacing 3.3 V MCUs to 5 V peripherals without external level shifters.

Is the CD74HC365MT pin-compatible with the CD74HCT365 series?

No, the CD74HC365MT is not pin-compatible with CD74HCT365 variants. While both share identical pinout and package, the HCT version uses TTL-compatible inputs (VIH = 2 V min, VIL = 0.8 V max) and is restricted to 4.5 V–5.5 V operation. Swapping them risks input threshold mismatch and undefined logic states at 3.3 V or 2.5 V supplies.

What is the maximum capacitive load the CD74HC365MT can drive reliably?

The CD74HC365MT is characterized up to 50 pF load capacitance in switching specifications, with 8 ns typical delay at 15 pF and 18 ns at 50 pF (VCC = 6 V). For reliable operation beyond 50 pF, derate supply voltage or add series termination; output rise/fall times remain under 15 ns (CL = 50 pF, VCC = 5 V), supporting clean edges on moderately loaded PCB traces.

Does the CD74HC365MT require external pull-up or pull-down resistors on unused inputs?

No - unused inputs on the CD74HC365MT should be tied to VCC or GND, but not left floating. Due to its CMOS inputs with ≤1 µA leakage and defined VIH/VIL thresholds, no external resistors are needed for static biasing. However, tying unused enables (OE1/OE2) to GND ensures default output activation, while tying to VCC forces permanent high-Z state for safety-critical isolation.