Texas Instruments CD74HCT367E

Overview

CD74HCT367E from Texas Instruments is a high-speed CMOS hex non-inverting buffer/line driver with three-state outputs, designed for bus interface and data routing in industrial control and instrumentation systems. It features dual independent three-state enable controls (1OE, 2OE), 4.5 V to 5.5 V operation, typical propagation delay of 9 ns at VCC = 5 V and CL = 15 pF, and drives up to 15 LSTTL loads.

For engineers reviewing the CD74HCT367E datasheet, CD74HCT367E pinout, CD74HCT367E application, or CD74HCT367E equivalent, this device is selected for robust 5-V logic-level translation, high-current bus driving, and wide-temperature (-55°C to +125°C) system interfacing where LSTTL compatibility and low power consumption are critical.

Technical Context

The CD74HCT367E implements six non-inverting buffer gates partitioned into two groups: four gates controlled by 1OE (pins 1, 2, 3, 4, 5, 6, 7, 9, 10) and two gates controlled by 2OE (pins 11, 12, 13, 14, 15). Each output delivers ±4 mA drive strength at VCC = 4.5–5.5 V, enabling reliable switching into 50-pF loads with ≤38 ns max propagation delay across full temperature range.

Its HCT logic family ensures direct LSTTL input compatibility (VIH ≥ 2.0 V, VIL ≤ 0.8 V), CMOS-level input leakage (≤1 μA), and rail-to-rail output swing (VOH ≥ 3.98 V, VOL ≤ 0.4 V at IO = ±4 mA), making it suitable for mixed-logic-system interfacing without level-shifting circuitry.

Key Specifications

Pinout & Package

CD74HCT367E is housed in a 16-pin plastic dual in-line package (PDIP-N), with 19.31 mm × 6.35 mm body size and through-hole mounting compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HCT244N and CD74HCT367M, the CD74HCT367E offers optimal balance of proven through-hole reliability, exact 6-channel count, and drop-in compatibility with legacy 5-V industrial control schematics-no layout or firmware changes needed.

Availability

CD74HCT367E is available at Aetrix Electronics and suitable for industrial automation, avionics data acquisition, and automotive body control applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CD74HCT367E 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 and embedded processing solutions, with over 90 years of innovation in high-reliability logic, power, and signal chain technologies.

The CD74HCT367E belongs to TI's industry-standard HCT logic family, engineered for seamless interoperability with legacy TTL systems while delivering CMOS power efficiency and extended temperature performance.

FAQ

What is the maximum clock frequency supported by CD74HCT367E in a bus-driving application?

The CD74HCT367E does not operate as a clocked device but as a combinatorial buffer. Its 38 ns maximum propagation delay at full temperature range implies reliable operation with data edges up to ~13 MHz (1/2 × tpd) in worst-case scenarios. For clean 50-pF bus loads at 25°C, the CD74HCT367E sustains signal integrity beyond 25 MHz due to its 9 ns typical tpd and fast 12 ns output transition time.

Can CD74HCT367E be used with 3.3-V microcontrollers?

No-CD74HCT367E requires 4.5 V to 5.5 V VCC and is not 3.3-V tolerant. Its inputs meet LSTTL thresholds (VIH ≥ 2.0 V), so a 3.3-V MCU output may not reliably register as HIGH. To interface with 3.3-V logic, use a level translator or select a 3.3-V–compatible buffer such as SN74LVC244A; the CD74HCT367E must be powered from 5 V and driven by 5-V–compatible sources.

How are the two output-enable controls (1OE and 2OE) intended to be used in system design?

1OE (pin 1) controls Y1–Y4; 2OE (pin 15) controls Y5–Y6. This partitioning allows independent bus arbitration-for example, using Y1–Y4 for sensor readback and Y5–Y6 for actuator command lines. Both enables are active-low and internally pulled down; tie unused enables to GND for always-active operation or drive from MCU GPIOs for dynamic control. No external pull-up resistors are required.

Does CD74HCT367E support hot-swap or live-insertion on a powered bus?

No-CD74HCT367E lacks hot-swap protection circuitry. Applying VCC before establishing proper GND connection, or inserting into a live 5-V bus, risks latch-up or permanent damage due to absolute maximum ratings violation (e.g., VI > VCC + 0.5 V). Always power-cycle the host system before mechanical insertion; use series resistors or dedicated hot-swap controllers if live insertion is mandatory.

What is the recommended bypass capacitor for CD74HCT367E?

Texas Instruments specifies a 0.1-μF ceramic capacitor placed as close as possible to the VCC (pin 16) and GND (pin 8) pins. For improved high-frequency noise suppression, a parallel 1-μF tantalum or ceramic capacitor is acceptable. Avoid electrolytic capacitors due to high ESL; ensure total loop inductance from capacitor to IC pins is minimized (<5 mm trace length) to maintain effective decoupling above 10 MHz.