Diodes Incorporated 74HCT86T14-13

Overview

74HCT86T14-13 from Diodes Incorporated is a quad 2-input XOR gate IC in TSSOP-14 package, operating at 4.5–5.5 V supply, delivering 4 mA output drive, 17 ns typical propagation delay (CL = 50 pF), and TTL-compatible inputs. It performs Boolean Y = A ⊕ B across four independent channels for digital logic decision paths in PC motherboard I/O control and peripheral interface arbitration.

For engineers reviewing the 74HCT86T14-13 datasheet, 74HCT86T14-13 pinout, 74HCT86T14-13 application, or 74HCT86T14-13 equivalent, key selection criteria include guaranteed 4 mA sink/source capability at 4.5 V, Schmitt-trigger input hysteresis for noise immunity, CMOS power efficiency (<40 µA ICC max), and TSSOP-14 thermal performance in space-constrained embedded logic nodes.

Technical Context

This device implements four independent, non-inverting XOR functions with push-pull outputs-each gate computes Y = A·B̅ + Ā·B. All inputs feature Schmitt-trigger action (typical hysteresis ≈ 0.5 V), enabling robust operation with slow-rising or noisy signals.

It operates strictly within 4.5–5.5 V VCC, with VIH ≥ 2.0 V and VIL ≤ 0.8 V over full temperature range (–40°C to +125°C), ensuring interoperability with legacy TTL and mixed-voltage 5 V systems without level translation.

Key Specifications

Pinout & Package

TSSOP-14 (Thin Shrink Small Outline Package, 4.9 × 4.5 mm body, 0.65 mm pitch) with exposed pad not electrically connected; JEDEC MO-153 compliant; thermal resistance θJA ≈ 130°C/W (standard PCB layout).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar XOR gate applications.

Compared with SN74HCT86DR and 74LVC86GW,118, the 74HCT86T14-13 uniquely balances 5 V TTL compatibility, TSSOP space savings, and Schmitt-trigger noise immunity-making it optimal for retrofitting legacy 5 V logic into compact industrial controllers.

Availability

74HCT86T14-13 is available at Aetrix Electronics and suitable for PC motherboard I/O control, USB hub status arbitration, and industrial PLC input debouncing requiring stable component supply and long-term manufacturability.

Supply support for 74HCT86T14-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The 74HCT logic family targets industrial and computing applications requiring 5 V TTL compatibility, robust ESD performance, and drop-in replacement capability for legacy LS-TTL components.

FAQ

Can 74HCT86T14-13 operate reliably at 4.5 V with full output drive capability?

Yes. The datasheet guarantees ±4 mA output current at VCC = 4.5 V across –40°C to +125°C, with VOH ≥ 3.70 V and VOL ≤ 0.4 V under those conditions. This ensures full fan-out to standard TTL loads without marginality.

Does this device require external pull-up resistors on unused inputs?

No. Unused inputs must be tied to either VCC or GND per the datasheet's Recommended Operating Conditions (Note 6). Pull-up resistors are unnecessary and may increase power consumption or noise susceptibility.

What is the maximum clock frequency supported for toggle operation?

While not a clocked device, its 17 ns typical propagation delay supports reliable data toggling up to ~30 MHz in feedback or combinatorial paths (assuming 50 pF load and 5 V supply), verified by switching characteristics tables across temperature ranges.

Is the TSSOP-14 package thermally adequate for continuous operation at +125°C ambient?

Yes. With θJA ≈ 130°C/W and max power dissipation of 500 mW, junction temperature remains below 150°C limit at 125°C ambient when total DC power is ≤ 192 mW - well above typical ICC × VCC (≤ 0.22 mW) plus dynamic load losses.