STMicroelectronics 74LVC86ATTR

Overview

74LVC86ATTR from STMicroelectronics is a low-voltage CMOS quad exclusive-OR gate with 14-pin TSSOP package, operating from 1.65 V to 3.6 V, delivering 4.2 ns max propagation delay at 3 V, ±24 mA output drive, and 5 V-tolerant inputs for mixed-voltage interfacing in 3.3/5 V systems.

For engineers reviewing the 74LVC86ATTR datasheet, 74LVC86ATTR pinout, 74LVC86ATTR application, or 74LVC86ATTR equivalent, key selection criteria include symmetric output impedance, latch-up immunity >500 mA, ESD robustness (HBM >2 kV), PCI bus-level drive capability, and pin/function compatibility with standard 74-series 86 logic.

Technical Context

The 74LVC86ATTR implements four independent XOR gates using sub-micron C2MOS technology, supporting rail-to-rail input voltage range (0–5.5 V) while maintaining valid logic thresholds across 1.65–3.6 V supply. Its input protection diodes and power-down safe I/O enable hot-swap and partial-power-down operation without back-driving.

Propagation delays are balanced (tPLH ≅ tPHL), skew is limited to 1 ns max between outputs, and dynamic noise performance is characterized with defined test loads (CL = 50 pF, RL = 500 Ω). The device guarantees truth table operation from 1.2 V (data retention) up to 3.6 V.

Key Specifications

Pinout & Package

74LVC86ATTR is housed in a 14-lead Thin Shrink Small Outline Package (TSSOP), 4.4 mm × 5.0 mm body, 0.65 mm pitch, with exposed pad not present. Pin 1 marked by notch or dot; pin 7 = GND, pin 14 = VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC86APW and 74AHC86PW, the 74LVC86ATTR offers unique 5 V input tolerance at 3.3 V supply with guaranteed PCI-level drive - making it the only option among the three that eliminates level shifters in 3.3/5 V mixed-signal interfaces without sacrificing speed or noise immunity.

Availability

74LVC86ATTR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, USB host controller interface logic, and automotive body control units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant variants.

Supply support for 74LVC86ATTR 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 microcontrollers, analog ICs, power management devices, and discrete components for industrial, automotive, and consumer markets.

The 74LVC86ATTR belongs to ST's LVC (Low-Voltage CMOS) logic family, engineered specifically for high-speed, low-power, mixed-voltage interoperability in space-constrained embedded systems operating from 1.65 V to 3.6 V.

FAQ

Can 74LVC86ATTR operate with VCC = 1.8 V and still meet all AC specifications?

Yes. The device is fully specified from 1.65 V to 3.6 V. At VCC = 1.8 V, tPLH/tPHL max is 8.9 ns (CL = 30 pF), VIH = 0.65×VCC = 1.17 V, and IOL/IOH = ±4 mA - all guaranteed per Table 6 and Table 8. No derating or external compensation is required.

Is the 74LVC86ATTR pin-compatible with older 74LS86 or 74HC86 devices?

It is functionally and pinout-compatible with 74-series 86 logic (including 74LS86 and 74HC86) in 14-pin SO and TSSOP packages. However, VCC and GND pin locations match exactly, while input/output voltage thresholds and drive strength differ - direct replacement requires verification of signal levels and fan-out loading.

Does 74LVC86ATTR require external pull-up or pull-down resistors on unused inputs?

No. Unused inputs may be tied directly to VCC or GND. The device features low input leakage (±5 µA max) and no internal weak pull-ups; floating inputs are electrically unsafe and must be avoided. Internal protection diodes prevent damage, but undefined logic states can cause excessive ICC or oscillation.

What is the maximum recommended PCB trace length for 74LVC86ATTR outputs driving 50 pF loads at 10 MHz?

For signal integrity below 10% overshoot and <0.5 ns jitter, trace length should be ≤10 cm on FR-4 with controlled 50 Ω impedance. The device's 24 mA drive and 4.2 ns tPD support such routing; longer traces require series termination (22–33 Ω) at the source to suppress reflections.