Texas Instruments SN74HC367D

Overview

SN74HC367D from Texas Instruments is a hex buffer and line driver IC with 3-state outputs, organized as two independent banks (4-channel + 2-channel), each controlled by its own active-low output-enable pin (1OE, 2OE). It operates from 2 V to 6 V, delivers ±6 mA output drive at 5 V, and achieves typical propagation delay of 10 ns - enabling reliable bus buffering and memory address driving in industrial control and embedded systems.

For engineers reviewing the SN74HC367D datasheet, SN74HC367D pinout, SN74HC367D application, or SN74HC367D equivalent, this device serves as a high-current, low-power 3-state logic buffer for bidirectional bus interfacing, memory address register isolation, and clock distribution where output enable control per bank is required.

Technical Context

The SN74HC367D implements true (non-inverting) buffer functionality across six independent channels, partitioned into two logically isolated groups: Bank 1 (pins 1A1–1Y4, controlled by 1OE) and Bank 2 (pins 2A1–2Y2, controlled by 2OE). Each output enters high-impedance state when its respective OE is high, allowing shared bus operation without contention.

It uses silicon-gate CMOS technology, ensuring TTL-compatible input thresholds (VIH = 3.15 V min at VCC = 4.5 V), low input current (≤1 µA max), and rail-to-rail output swing (VOH ≥ 4.4 V, VOL ≤ 0.26 V at VCC = 4.5 V, IO = ±4 mA). Thermal resistance RθJA is 73°C/W in SOIC (D) package.

Key Specifications

Pinout & Package

SN74HC367D is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package measuring 9.90 mm × 3.90 mm with standard 1.27 mm pitch. The package is RoHS-compliant, lead-finished with NiPdAu, and rated MSL Level-1 (unlimited floor life).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HCT367D and 74LVC125AD, the SN74HC367D uniquely supports independent 4+2 channel enable control, wider 2–6 V supply flexibility, and higher drive strength - making it optimal for segmented bus architectures requiring precise timing isolation between address and data sub-buses.

Availability

SN74HC367D is available at Aetrix Electronics and suitable for industrial control panels, embedded instrumentation, and programmable logic expansion requiring stable component supply, long-term lifecycle support, and RoHS-compliant SOIC packaging.

Supply support for SN74HC367D 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 over 90 years of innovation in industrial, automotive, and communications markets.

The SN74HC367D belongs to TI's 74HC logic family - designed for high-speed, low-power, pin-compatible upgrades to legacy TTL devices in memory, bus, and clock distribution systems.

FAQ

What is the maximum operating frequency supported by SN74HC367D?

The SN74HC367D does not specify a maximum clock frequency in its datasheet because it is a combinational buffer, not a clocked device. However, its typical propagation delay of 10 ns at 4.5 V implies reliable operation up to ~20 MHz for address/data bus applications with 50 pF load. For higher frequencies, layout parasitics and load capacitance become dominant limiting factors - verified via SPICE simulation or board-level timing analysis using the SN74HC367D switching characteristics table.

Can SN74HC367D operate at 3.3 V supply?

Yes, SN74HC367D is fully specified for operation from 2 V to 6 V, including 3.3 V. At VCC = 3.3 V, VIH = 2.31 V min and VIL = 0.99 V max ensure compatibility with standard 3.3 V logic families. Output drive drops to ±4 mA, and tpd increases to ~15 ns (typical), which remains adequate for most embedded control interfaces - confirmed in Section 5.2 and 5.5 of the SN74HC367D datasheet.

How should unused inputs be handled on SN74HC367D?

All unused inputs on SN74HC367D must be tied to either VCC or GND - floating inputs cause increased ICC, erratic output behavior, and potential latch-up. Unused A inputs should be pulled to GND (for LOW) or VCC (for HIGH); unused OE inputs must be held LOW to enable their respective bank or HIGH to disable it permanently. This requirement is explicitly stated in Section 5.2 Note 1 and Section 9.1 of the official SN74HC367D datasheet.

Is SN74HC367D pin-compatible with SN74HC244?

No, SN74HC367D is not pin-compatible with SN74HC244. While both are octal buffers with 3-state outputs, SN74HC367D has dual OE pins (1OE, 2OE) controlling 4+2 channels and uses pins 1/15 for OE, whereas SN74HC244 uses pins 1/19 for OE and has different pin mapping (e.g., 2A1 on pin 2 vs. 1A1 on pin 2). Physical pinouts differ entirely - confirmed by comparing SN74HC367D (SOIC-16, D package) and SN74HC244 (SOIC-20, DW package) mechanical drawings.

Does SN74HC367D support hot-swap or live-insertion?

SN74HC367D is not characterized or guaranteed for hot-swap operation. Its absolute maximum ratings do not include powered insertion stress testing, and the absence of Ioff (power-off protection) specification means outputs may source/sink current during partial power-up. For hot-swap applications, TI recommends dedicated hot-swap controllers or buffers with explicit Ioff support (e.g., SN74AVC series) - as noted in the SN74HC367D "Important Notice" section regarding safety-critical use.