STMicroelectronics 74VHCT86ATTR

Overview

74VHCT86ATTR from STMicroelectronics is a quad 2-input XOR gate IC in TSSOP-14 package, operating at 4.5–5.5 V, with 5.5 ns typical propagation delay, ±8 mA symmetrical output drive, and TTL-compatible input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V). It enables logic-level translation between 5 V and 3 V systems in digital control and interface circuits.

For engineers reviewing the 74VHCT86ATTR datasheet, 74VHCT86ATTR pinout, 74VHCT86ATTR application, or 74VHCT86ATTR equivalent, key selection criteria include propagation delay matching, input voltage compatibility across mixed-supply domains, symmetrical output drive for balanced timing, and ESD immunity in industrial I/O designs.

Technical Context

This device implements four independent CMOS XOR gates using sub-micron C2MOS technology, supporting rail-to-rail input tolerance (−0.5 V to +7 V) regardless of VCC. Power-down protection ensures safe operation during supply sequencing or hot-swap events.

All inputs and outputs feature integrated ESD protection (2 kV HBM), and the logic function adheres strictly to the Boolean expression Y = A ⊕ B per gate. Propagation delays are balanced (tPLH ≈ tPHL), minimizing duty-cycle distortion in clocked or data-path applications.

Key Specifications

Pinout & Package

TSSOP-14 (Thin Shrink Small Outline Package), 4.9 mm × 6.4 mm body, 0.65 mm pitch, 1.05 mm max height. RoHS-compliant, tape-and-reel packaging (TR suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC86APW and 74HC86D, the 74VHCT86ATTR uniquely combines 5 V TTL compatibility, rail-tolerant inputs, and power-down safety - making it the only choice for robust 5 V system integration where supply sequencing or mixed-voltage interoperability is required.

Availability

74VHCT86ATTR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, legacy bus arbitration circuits, and automated test equipment requiring stable component supply and long-term lifecycle support.

Supply support for 74VHCT86ATTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for industrial, automotive, and consumer markets.

The VHCT logic family targets 5 V systems requiring TTL compatibility, low power, and enhanced robustness - specifically engineered for industrial control, instrumentation, and legacy interface bridging applications.

FAQ

Can the 74VHCT86ATTR operate with a 3.3 V supply?

No. The 74VHCT86ATTR is specified only for 4.5–5.5 V operation. Its TTL-compatible input thresholds and internal C2MOS structure require nominal 5 V bias for guaranteed VIH/VIL margins and output drive strength. Using 3.3 V may cause undefined logic states or excessive propagation delay.

Does this device support hot-swap insertion while powered?

Yes. Power-down protection on all inputs and outputs allows safe insertion into a live 5 V backplane. Inputs tolerate −0.5 V to +7 V regardless of VCC state, and outputs enter high-impedance mode when VCC = 0 V - preventing bus contention or latch-up during insertion.

What is the maximum capacitive load this device can drive reliably?

The 74VHCT86ATTR is characterized up to 50 pF (AC specs table). Driving >50 pF increases propagation delay nonlinearly and may exceed VOLP limits. For >50 pF loads, add series termination or use a buffer stage - confirmed by measured tPD = 10.0 ns max at CL = 50 pF, VCC = 5 V.

How does its ESD rating compare to standard 74HC devices?

The 74VHCT86ATTR provides 2 kV HBM ESD immunity per IEC 61000-4-2, exceeding typical 74HC-series ratings (typically 2 kV HBM but untested per JEDEC JESD22-A114). This is achieved via dedicated input/output protection structures - validated in ST's qualification report QM-00127 for industrial temperature grade.