Texas Instruments CD74HCT365M

Overview

CD74HCT365M 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, 8 ns typical propagation delay at 5 V/15 pF, ±25 mA output drive, and -55°C to +125°C operating range-used in bus interface and data routing applications in industrial control and instrumentation systems.

For engineers reviewing the CD74HCT365M datasheet, CD74HCT365M pinout, CD74HCT365M application, or CD74HCT365M equivalent, key selection considerations include LSTTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V), SOIC-16 package footprint, three-state bus driving capability, and HCT-family 4.5–5.5 V supply compliance.

Technical Context

The CD74HCT365M implements six independent non-inverting buffers, each with high-current CMOS outputs capable of driving up to 15 LSTTL loads. Its dual active-low enable inputs (OE1, OE2) are internally NORed to simultaneously place all six outputs in high-impedance state when either is asserted.

It operates strictly within 4.5–5.5 V, matching standard LS TTL logic levels for direct interfacing without level translation. Propagation delays (tPLH/tPHL = 9 ns typ. at 5 V/15 pF) and transition times (tTLH/tTHL = 12 ns typ.) are characterized across full temperature range (-55°C to +125°C), supporting robust timing in harsh environments.

Key Specifications

Pinout & Package

CD74HCT365M is housed in a 16-pin SOIC (D) package with 9.90 mm × 3.90 mm body size, 1.27 mm pitch, and RoHS-compliant NiPdAu lead finish (Level-1 MSL rating).

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 CD74HCT365M offers optimal channel count and dual-NOR enable simplicity for compact 6-line bus isolation, avoiding unnecessary pin count or enable complexity in space-constrained industrial designs.

Availability

CD74HCT365M is available at Aetrix Electronics and suitable for industrial control, avionics data acquisition, and test equipment signal routing requiring stable component supply across extended temperature ranges.

Supply support for CD74HCT365M 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 logic solutions for industrial, automotive, and communications markets.

The CD74HCT365M belongs to TI's HCT logic family, engineered for seamless replacement of legacy LS TTL in high-reliability systems where 5 V compatibility, wide temperature operation, and low power consumption are essential.

FAQ

What is the maximum output current specification for CD74HCT365M?

The CD74HCT365M supports ±25 mA DC output source or sink current per output pin under recommended operating conditions (VO > −0.5 V or VO < VCC + 0.5 V). This rating applies across the full −55°C to +125°C temperature range and enables direct driving of multiple LSTTL loads without external amplification. The CD74HCT365M maintains this drive strength while delivering sub-10 ns propagation delay, making it suitable for high-speed bus interface applications.

Does CD74HCT365M support operation outside the 4.5–5.5 V supply range?

No, CD74HCT365M is specified exclusively for 4.5 V to 5.5 V operation. Unlike HC-series variants that operate from 2 V to 6 V, the HCT family is optimized for strict 5 V TTL compatibility-its input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) and output drive characteristics are only guaranteed within this narrow window. Operating CD74HCT365M below 4.5 V may cause unreliable logic recognition; above 5.5 V risks exceeding absolute maximum ratings and voiding reliability guarantees.

How are the two output enable inputs (OE1 and OE2) logically combined in CD74HCT365M?

In CD74HCT365M, OE1 and OE2 are internally NORed: all six outputs enter high-impedance (Z) state whenever either OE1 or OE2 is driven low. Both enables must be high for normal buffered operation. This architecture allows flexible bus control-either enable line can independently disable the entire device, simplifying arbitration logic in multi-master systems. The CD74HCT365M datasheet confirms this behavior in Table 7-1 (Function Table) and Section 7.3.

What is the typical propagation delay of CD74HCT365M at 5 V and 15 pF load?

The typical propagation delay (tPLH and tPHL) of CD74HCT365M is 9 ns at VCC = 5 V with CL = 15 pF and TA = 25°C, as specified in Section 5.6 of the TI datasheet (SCHS180D). This value is measured from input transition to valid output transition under standard test conditions (tr/tf = 6 ns). The CD74HCT365M maintains timing performance across temperature, with worst-case delays of 14 ns at −55°C to +125°C, ensuring predictable timing in demanding environments.

Is CD74HCT365M pin-compatible with CD74HC365M or CD74HCT366M?

CD74HCT365M is pin-compatible with CD74HC365M (same SOIC-16 footprint and pin functions), but not with CD74HCT366M-the latter is an inverting buffer with identical pinout but complementary logic behavior. While physical layout matches, substituting CD74HCT365M for CD74HCT366M would invert all six data paths, breaking functional correctness unless firmware compensates. The CD74HCT365M datasheet explicitly distinguishes its non-inverting function versus the 366's inverting topology in Section 2 and Figure 4-1.