Texas Instruments SN74HC365PW

Overview

SN74HC365PW from Texas Instruments is a hex noninverting buffer/line driver with dual 3-state outputs, designed for bus interface and memory address driving in industrial and embedded systems. It operates from 2 V to 6 V, delivers ±6 mA output drive at 5 V, exhibits typical propagation delay of 10 ns, and features low ICC of 80 µA max - enabling reliable signal buffering in space-constrained TSSOP-16 layouts.

For engineers reviewing the SN74HC365PW datasheet, SN74HC365PW pinout, SN74HC365PW application, or SN74HC365PW equivalent, key selection criteria include its dual OE control architecture, 3-state bus-hold capability, thermal resistance (RθJA = 108 °C/W), voltage-level translation compatibility across 2–6 V, and suitability for high-density PCB routing in memory subsystems and I/O expansion modules.

Technical Context

The SN74HC365PW implements six independent CMOS buffer channels, each with true (noninverting) logic and dual-gated 3-state output control via OE1 and OE2 pins. Both enable inputs must be low for data pass-through; either high forces all Y outputs into high-impedance mode - supporting bidirectional bus arbitration and dynamic load isolation.

Its HC-family silicon ensures TTL-compatible input thresholds, rail-to-rail output swing, and robust noise immunity (VIH ≥ 3.15 V at VCC = 4.5 V; VIL ≤ 1.35 V). The device meets JEDEC JESD78 Class II latch-up immunity and supports operation from −40°C to +85°C with guaranteed switching performance up to 6 V supply.

Key Specifications

Pinout & Package

TSSOP-16 package (5.00 mm × 4.40 mm body, 1.2 mm max height), JEDEC MO-153 compliant, with exposed pad not electrically connected. Pin 1 marked by index area; pin pitch = 0.65 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex buffer with 3-state output applications.

Compared with SN74HC365PW, SN74HCT365PW offers superior noise margin for TTL-derived inputs, while SN74LVC365APW provides higher drive and lower thermal resistance at reduced supply voltages - making it more suitable for compact, high-density 3.3 V applications.

Availability

SN74HC365PW is available at Aetrix Electronics and suitable for industrial automation, embedded computing, and test equipment applications requiring stable component supply and long-term obsolescence management.

Supply support for SN74HC365PW 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 expertise in high-reliability logic families.

The SN74HC365PW belongs to TI's 74HC logic series - engineered for low-power, high-speed CMOS operation in industrial and commercial systems where voltage flexibility and bus integrity are critical.

FAQ

What is the maximum operating temperature for the SN74HC365PW?

The SN74HC365PW is rated for operation from −40°C to +85°C ambient temperature. Its thermal resistance (RθJA = 108 °C/W) means junction temperature remains within safe limits (<125°C) under typical 5 V, 10 mA per output loading with adequate PCB copper. Derating is required above 70°C ambient if driving all six outputs continuously.

Does the SN74HC365PW support voltage-level translation between 3.3 V and 5 V systems?

Yes, the SN74HC365PW supports bidirectional voltage-level translation: it accepts 3.3 V logic inputs while powered from 5 V (VIH = 3.15 V min at VCC = 4.5 V), and drives 5 V-tolerant outputs when powered from 3.3 V (VOH ≈ 3.15 V). This enables safe interfacing between mixed-voltage subsystems without external translators.

How does the dual OE architecture of the SN74HC365PW improve system design?

The SN74HC365PW uses two independent active-low output enables (OE1 and OE2) - either high places all six Y outputs in high-impedance state. This allows partitioned bus control, such as enabling memory address buffers while disabling peripheral I/O drivers, reducing simultaneous switching noise and simplifying timing-critical bus arbitration in multi-master systems.

Can unused inputs on the SN74HC365PW be left floating?

No - all unused inputs on the SN74HC365PW must be tied to VCC or GND. Floating CMOS inputs cause increased ICC, unpredictable output states, and potential oscillation due to noise coupling. TI recommends connecting unused A inputs directly to VCC or GND using short traces, consistent with the device's recommended operating conditions.

Is the SN74HC365PW pin-compatible with other packages in the SN74HC365 family?

Yes - the SN74HC365PW shares identical pin numbering and function mapping with SN74HC365D (SOIC), SN74HC365N (PDIP), and SN74HC365NS (SOP). All variants use the same 16-pin layout with A1–A6, Y1–Y6, OE1, OE2, VCC, and GND in identical positions, enabling drop-in replacement across packages when board layout accommodates footprint differences.