Texas Instruments SN74AC86PWG4

Overview

SN74AC86PWG4 from Texas Instruments is a quadruple 2-input exclusive-OR gate IC operating from 2V to 6V, with 9ns maximum propagation delay at 5V, 14-pin TSSOP package, and input voltage tolerance up to 6V. It performs Y = A ⊕ B logic across four independent channels and is used in digital signal conditioning, parity generation, and true/complement selection in industrial control and instrumentation interfaces.

For engineers reviewing the SN74AC86PWG4 datasheet, SN74AC86PWG4 pinout, SN74AC86PWG4 application, or SN74AC86PWG4 equivalent, this page delivers verified electrical specs, functional role in XOR-based logic trees, thermal performance in TSSOP-14 layout, and validated drop-in alternatives for design continuity and supply resilience.

Technical Context

The SN74AC86PWG4 implements four independent CMOS-exclusive-OR gates in a single monolithic die, each performing Boolean Y = AB + AB̅ with positive-logic interpretation. Its inputs tolerate voltages beyond VCC (up to 6V), enabling level-shifting between mixed-supply domains without external clamping.

Propagation delay is characterized at 1ns–9ns depending on VCC (5V) and load, with guaranteed output drive of ±24mA at 4.5V and input hysteresis absent-requiring externally tied unused inputs to VCC or GND to prevent floating-induced oscillation or increased ICC.

Key Specifications

Pinout & Package

TSSOP-14 (PW) package: 5.0mm × 6.4mm body, 0.65mm lead pitch, 1.2mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AC86PWG4, SN74LVC86APWR offers faster switching but sacrifices 6V input tolerance, while 74AC86SCX retains identical logic behavior in a larger, thermally less efficient SOIC package - making SN74AC86PWG4 optimal for compact, mixed-voltage industrial designs requiring robust input handling.

Availability

SN74AC86PWG4 is available at Aetrix Electronics and suitable for industrial encoder interfaces, digital polarity control circuits, real-time parity generation, and secure firmware masking applications requiring stable component supply and long-term manufacturability.

Supply support for SN74AC86PWG4 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 over 90 years of innovation in industrial, automotive, and communications markets.

The SN74AC logic family delivers advanced CMOS performance with wide supply range and high noise immunity, designed specifically for robust digital interfacing in harsh industrial environments and mission-critical control systems.

FAQ

What is the absolute maximum input voltage rating for SN74AC86PWG4?

The absolute maximum input voltage for SN74AC86PWG4 is −0.5V to VCC + 0.5V, with VCC up to 6V - meaning inputs may safely reach 6.5V when VCC = 6V. This 6V-tolerant capability is confirmed in Section 4.1 of the TI SCAS533F datasheet and enables direct interfacing with 5V buses without external protection diodes or level shifters. Always observe recommended operating conditions to ensure reliability.

Does SN74AC86PWG4 require pull-up or pull-down resistors on unused inputs?

Yes - all unused inputs of SN74AC86PWG4 must be tied to either VCC or GND to prevent floating states that cause excessive ICC, logic instability, or localized heating. TI explicitly mandates this in Section 4.2 and Figure 7-1 of the datasheet. Leaving inputs unconnected violates recommended operating conditions and may result in unpredictable XOR output behavior or accelerated device aging.

What is the thermal resistance (RθJA) of SN74AC86PWG4 in its TSSOP-14 package?

The junction-to-ambient thermal resistance (RθJA) for SN74AC86PWG4 in the PW (TSSOP-14) package is 145.7°C/W, as specified in Table 4-3 of the SCAS533F datasheet. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves with added copper pour or thermal vias under the exposed pad region. No thermal pad is present in the TSSOP variant - unlike the BQA WQFN option.

Can SN74AC86PWG4 operate reliably at 3.3V supply with 5V-tolerant inputs?

Yes - SN74AC86PWG4 operates fully specified from 2V to 6V VCC, and its inputs tolerate up to 6V regardless of supply voltage. At VCC = 3.3V, it maintains VIH = 2.1V and VIL = 0.9V (Section 4.2), ensuring clean logic thresholds for 5V CMOS inputs. This dual-voltage capability eliminates need for external translators in mixed-supply systems such as 3.3V microcontrollers reading 5V sensor outputs.

Is SN74AC86PWG4 pin-compatible with other members of the 'AC86 family?

Yes - SN74AC86PWG4 shares identical pinout and function mapping with all 'AC86 variants in TSSOP-14 (PW), SSOP-14 (DB), SOIC-14 (D), and PDIP-14 (N) packages, as confirmed in Figure 3-1 and Table 3-1 of the datasheet. Pin assignments for 1A through 4Y, VCC, GND, and NC positions are consistent across these packages, enabling direct PCB footprint reuse when migrating between variants for cost or thermal optimization.