Texas Instruments SN74AHC367N

Overview

SN74AHC367N from Texas Instruments is a hex noninverting buffer/line driver with dual 3-state enable inputs (1OE, 2OE), designed for 2V–5.5V operation and used in bus interface, memory address driving, and signal routing applications. It features six independent channels grouped as two functional blocks (four-channel + two-channel), ±8 mA output drive at 5 V, 10 ns typical propagation delay, and high-impedance outputs when disabled.

For engineers reviewing the SN74AHC367N datasheet, SN74AHC367N pinout, SN74AHC367N application, or SN74AHC367N equivalent, key selection considerations include its dual 3-state control architecture, PDIP-16 package compatibility with through-hole prototyping, rail-to-rail input voltage tolerance, low static current (4 µA typical), and ESD robustness (±2000 V HBM).

Technical Context

The SN74AHC367N implements positive-logic noninverting buffering with two independent active-low 3-state enables (1OE, 2OE), each controlling a subset of outputs: 1OE governs Y1–Y4, and 2OE governs Y1'–Y2' (labeled 2Y1, 2Y2). Its CMOS AHC logic family ensures TTL-compatible input thresholds and low power consumption across the full 2V–5.5V supply range.

Each output supports ±8 mA sink/source at 5 V with guaranteed VOL ≤ 0.44 V and VOH ≥ 3.8 V, enabling direct LED driving and robust noise immunity. The device operates from –40°C to +85°C and exhibits latch-up immunity exceeding 100 mA per JESD78 Class II, making it suitable for industrial control and mixed-voltage system interfacing.

Key Specifications

Pinout & Package

SN74AHC367N is supplied in a 16-pin Plastic Dual Inline Package (PDIP-N), with 19.3 mm × 9.4 mm body size and through-hole mounting. Pin 1 is marked by a notch or dot; the package is RoHS-compliant with NiPdAu lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AHCT367N, the SN74AHC367N offers wider input voltage tolerance but less aggressive TTL threshold compatibility; versus SN74LVC367N, it trades some speed and low-voltage flexibility for enhanced noise margin and legacy 5 V robustness.

Availability

SN74AHC367N is available at Aetrix Electronics and suitable for industrial control panels, test equipment interfaces, and legacy 5 V embedded systems requiring stable component supply and long-term obsolescence management.

Supply support for SN74AHC367N 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 experience in high-reliability industrial and automotive-grade components.

The SN74AHC367N belongs to TI's advanced high-speed CMOS (AHC) logic family, engineered for low-power, high-noise-immunity digital interfacing in mixed-voltage systems and legacy 5 V infrastructure upgrades.

FAQ

What is the maximum recommended supply voltage for SN74AHC367N?

The absolute maximum VCC rating for SN74AHC367N is 7 V, but the recommended operating range is strictly 2 V to 5.5 V per TI's SCLS424G datasheet. Operating above 5.5 V risks permanent damage and violates the device's qualified specifications. For sustained reliability in production, SN74AHC367N must be powered within this 2–5.5 V window, with 5.0 V ±5% being the most common implementation.

Can SN74AHC367N drive LEDs directly without current-limiting resistors?

No - SN74AHC367N requires external series current-limiting resistors for LED driving. Although it sources/sinks up to ±8 mA per output at 5 V, forward voltage drop and LED variability make fixed resistors essential to prevent overcurrent. For example, with a red LED (VF ≈ 1.8 V) and 5 V supply, a 390 Ω resistor limits current to ~8.2 mA, keeping SN74AHC367N within its rated IOL/IOH specification and ensuring long-term reliability.

Does SN74AHC367N support hot-swap or live-insertion?

SN74AHC367N is not explicitly rated for hot-swap operation. Its absolute maximum ratings allow VI up to 7 V and VO up to VCC + 0.5 V, but no built-in bus-hold, power-up 3-state, or Ioff partial-power-down protection is specified. To implement safe live insertion, external series resistors and controlled power sequencing are required; TI recommends tying both 1OE and 2OE to VCC via pull-up resistors during power-up to maintain outputs in high-Z until firmware asserts control.

How should unused inputs be handled on SN74AHC367N?

All unused inputs on SN74AHC367N must be terminated to a valid logic level - either VCC or GND - to prevent floating nodes that cause increased ICC, erratic output behavior, or ESD susceptibility. TI's datasheet specifies this in Section 5.3: "All unused inputs of the device must be held at VCC or GND." For example, if only three of six buffers are used, tie the remaining three A-inputs to GND (for LOW) or VCC (for HIGH), depending on desired default output state.

Is SN74AHC367N pin-compatible with SN74LS367N?

Yes - SN74AHC367N and SN74LS367N share identical PDIP-16 pinouts and functional assignments (1OE, 1A1–1Y4, 2OE, 2A1–2Y2, GND, VCC), enabling direct socket replacement in legacy designs. However, SN74AHC367N operates at lower power, higher speed, and broader voltage range (2–5.5 V vs. 4.75–5.25 V), so verify timing margins and input drive capability when upgrading from LS logic to avoid marginal functionality.