STMicroelectronics 74VHC86TTR

Overview

74VHC86TTR from STMicroelectronics is a quad 2-input exclusive-OR gate in TSSOP-14 package, operating from 2V to 5.5V, with 4.8 ns typical propagation delay at 5V, ±8 mA symmetrical output drive, and input tolerance up to 7V independent of VCC-enabling robust 5V-to-3V level translation in digital logic interfaces.

For engineers reviewing the 74VHC86TTR datasheet, 74VHC86TTR pinout, 74VHC86TTR application, or 74VHC86TTR equivalent, key selection criteria include rail-to-rail input voltage acceptance (0–7V), ESD immunity (2 kV HBM), low quiescent current (2 µA max), balanced tPLH/tPHL delays, and compatibility with legacy 74-series logic timing and function.

Technical Context

This device implements four independent XOR gates using sub-micron C2MOS technology, supporting mixed-voltage system interfacing via overvoltage-tolerant inputs that accept 0–7V regardless of VCC setting. Its power-down protection prevents back-driving during supply-off conditions.

The logic function follows standard XOR truth table behavior (Y = A ⊕ B) with symmetrical rise/fall propagation delays (tPLH ≅ tPHL), 28% VCC noise margin (VNIH/VNIL), and dynamic output noise limits (VOLP ≤ 0.8 V at 5V/50 pF).

Key Specifications

Pinout & Package

TSSOP-14 package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, 1.05 mm max height, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC86APWR and MC74VHC86DT, the 74VHC86TTR uniquely combines 7 V input tolerance, TSSOP-14 compactness, and guaranteed 2–5.5 V operation-making it optimal for mixed-voltage industrial and automotive signal conditioning where robustness and footprint matter.

Availability

74VHC86TTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, USB host controller glue logic, and automotive body control modules requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for 74VHC86TTR 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, designing and manufacturing analog, digital, and mixed-signal ICs for industrial, automotive, and consumer applications.

The 74VHC series targets high-speed, low-power CMOS logic replacement for legacy 74-series devices, emphasizing rail-flexible operation, enhanced noise immunity, and robustness in real-world embedded systems.

FAQ

Can 74VHC86TTR safely interface a 5 V microcontroller GPIO to a 3.3 V FPGA input?

Yes. All inputs tolerate 0–7 V regardless of V_CC, so connecting a 5 V GPIO directly to any input pin poses no risk-even if V_CC = 3.3 V. The output will swing rail-to-rail (0 V to 3.3 V), matching the FPGA's input thresholds. No external resistors or level shifters are required.

Does 74VHC86TTR require external pull-up or pull-down resistors on unused inputs?

No. Unused inputs may be tied directly to V_CC or GND. The device features internal power-down protection and high-impedance inputs when un-driven, eliminating floating node risks. External resistors add unnecessary board area and potential noise coupling.

What is the maximum output load capacitance supported at 5 V operation?

At V_CC = 5 V, the datasheet specifies AC performance up to 50 pF load capacitance (t_PD ≤ 8.0 ns). For reliable operation beyond 50 pF, reduce switching frequency or add series termination to limit slew rate and prevent ringing-induced false triggering.

Is 74VHC86TTR qualified for automotive AEC-Q100 Grade 1?

No. While the device operates from −55 °C to +125 °C, it is not AEC-Q100 qualified. STMicroelectronics offers the pin-compatible 74VHC86QTR variant (TSSOP-14, Q-grade) for automotive applications requiring formal qualification and PPAP documentation.