Texas Instruments CD74HC368MT

Overview

CD74HC368MT from Texas Instruments is a high-speed CMOS hex inverting buffer/line driver with three-state outputs, designed for bus interface and data routing in industrial control, instrumentation, and digital logic systems. It features dual independent three-state enables (OE1, OE2), 6-channel inverting logic, ±35 mA output drive, and operates from 2 V to 6 V across –55°C to +125°C.

For engineers reviewing the CD74HC368MT datasheet, CD74HC368MT pinout, CD74HC368MT application, or CD74HC368MT equivalent, key selection criteria include its inverting three-state buffer function, wide supply voltage range, high fanout capability (15 LSTTL loads), and compatibility with legacy TTL bus architectures requiring level translation and bus contention control.

Technical Context

The CD74HC368MT implements six independent inverting buffer channels, each with controlled three-state output enable logic. Its dual enable architecture-OE1 controlling Y1–Y4 and OE2 controlling Y5–Y6-enables segmented bus management and partial bus isolation without full system reset.

It uses silicon-gate CMOS technology to achieve propagation delays as low as 8 ns (VCC = 5 V, CL = 15 pF) while maintaining low ICC (≤160 μA over temperature) and high noise immunity (NIL/NIH = 30% of VCC). The device is not LSTTL-input compatible-unlike HCT variants-but supports direct connection to HC/HCT logic families across its full 2–6 V operating range.

Key Specifications

Pinout & Package

CD74HC368MT is supplied in a 16-pin SOIC (D) package with nominal body dimensions 9.90 mm × 3.90 mm and standard JEDEC MS-012AC footprint. Pin assignments follow industry-standard 16-pin logic IC layout with pin 1 marked by notch or bevel.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC368N and CD74HCT368M, CD74HC368MT offers broader supply flexibility (2–6 V), superior noise immunity, and SOIC packaging optimized for automated SMT production - making it the preferred choice for new industrial and aerospace designs requiring long-term availability and thermal robustness.

Availability

CD74HC368MT is available at Aetrix Electronics and suitable for industrial automation, avionics subsystems, and test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CD74HC368MT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The CD74HC368MT belongs to TI's legacy high-speed CMOS logic portfolio, engineered for reliable bus interface, signal routing, and level translation in harsh-environment digital systems where longevity, wide temperature operation, and low-power logic integrity are essential.

FAQ

What is the logic function of CD74HC368MT?

CD74HC368MT is a hex inverting three-state buffer: each of its six channels performs logical inversion (A → NOT Y) and provides high-impedance (Z) output when its associated enable input is asserted. It has two independent enables-1OE controls Y1–Y4, and 2OE controls Y5–Y6-allowing granular bus segmentation. This function is confirmed in the functional truth table and block diagram of the official TI datasheet SCHS181E.

Does CD74HC368MT support 3.3 V operation?

Yes, CD74HC368MT fully supports 3.3 V operation as part of its specified 2 V to 6 V supply range. At VCC = 3.3 V, it maintains guaranteed VOH ≥ 3.15 V and VOL ≤ 0.1 V under light loads, and delivers ±24 mA output drive-sufficient for driving modern 3.3 V logic and small-capacitance buses. This is verified in Section 5.4 (Electrical Characteristics) of the TI datasheet.

What is the maximum output current per pin for CD74HC368MT?

The absolute maximum continuous output current per pin for CD74HC368MT is ±35 mA, as specified in Section 5.1 (Absolute Maximum Ratings) of the TI datasheet. This rating applies across the full operating temperature range and enables robust driving of multiple LSTTL loads or moderate bus capacitances without external buffers.

Is CD74HC368MT pin-compatible with CD74HCT368M?

Yes, CD74HC368MT is pin-compatible with CD74HCT368M: both share identical 16-pin SOIC (D) package footprints, pin numbering, and functional pin assignments-including dual OE inputs and six inverting buffer channels. However, they differ electrically: CD74HC368MT operates from 2–6 V and accepts CMOS-level inputs, while CD74HCT368M is limited to 4.5–5.5 V and accepts TTL-level inputs.

What thermal performance can be expected from CD74HC368MT in SOIC package?

CD74HC368MT in SOIC (D) package has a junction-to-ambient thermal resistance (R_θJA) of 73°C/W, as documented in Section 5.3 of the TI datasheet. Under typical conditions-VCC = 5 V, all outputs switching at 1 MHz into 50 pF-the device dissipates <15 mW, resulting in negligible junction temperature rise (<2°C above ambient), even in enclosed industrial enclosures.