CI logiques
Produits (272)
SN74AXC8T245RJWR - 8-Bit Dual-Supply Bus Transceiver | Texas Instruments
The Texas Instruments SN74AXC8T245RJWR is an 8-bit non-inverting, bidirectional dual-supply bus transceiver with configurable voltage translation and 3-state outputs, housed in a 24-pin UQFN (RJW, 4x2 mm) package. It supports independent power-supply rails on each port from 0.65 V to 3.6 V, output drive current of 12 mA, and is fully specified for partial-power-down applications using Ioff. The device operates over an industrial -40C to +125C temperature range. A bus transceiver is a digital logic IC that bridges two buses operating at different voltage levels, allowing data to flow in either direction while protecting each side from incompatible logic levels. The SN74AXC8T245 belongs to TI's AXC family of voltage-level translators, which sit in the broader hierarchy: level translator -> bus transceiver -> logic IC -> semiconductor. The AXC series extends the older AVC and LVC families to lower supply nodes (0.7 V, 0.8 V, 0.9 V) used in modern ASICs, FPGAs, and processors while remaining backward-compatible with industry-standard 1.8 V, 2.5 V, and 3.3 V nodes. Key features include configurable direction control per direction (DIR pin), an active-low output-enable (OE) input that disables both ports to a high-impedance state, 12 mA balanced output drive strength, and ±24 mA DC latch-up protection. The Ioff circuitry disables the outputs when either VCC rail is powered down, preventing backflow current into a partially powered system - a critical requirement for hot-swap and multi-rail designs. Technical depth: the AXC architecture uses TI's advanced CMOS process with internal edge-rate accelerators that limit output rise/fall times to reduce EMI while preserving sufficient bandwidth for RGMII and similar multi-hundred-MHz interfaces. The dual-rail design means the DIR and OE control pins are always referenced to VCCA, simplifying control logic on the lower-voltage side. Typical applications include RGMII level shifting between an SoC and a PHY, I2C/SPI/UART bridging in mixed-voltage embedded systems, memory-bus isolation, and processor-to-peripheral translation in industrial and consumer designs. The 24-pin UQFN (4x2 mm) footprint keeps board area minimal. Design consideration: always populate both VCCA and VCCB decoupling capacitors (0.1 uF ceramic) within 2 mm of the respective pins, and ensure OE is held low until both rails have ramped to valid levels to avoid bus contention at startup. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
SN74BCT574 - Octal D-Type Flip-Flop 3-State | Texas Instruments
The Texas Instruments SN74BCT574 is an octal D-type edge-triggered flip-flop with 3-state outputs, built on a state-of-the-art BiCMOS process and designed to drive highly capacitive or relatively low-impedance loads in high-speed bus-oriented systems. It operates from a 4.5 V to 5.5 V supply and is offered in DB (SSOP), DW (SOIC), N (PDIP), and NS (SOP) packages. An octal D-type flip-flop is a digital logic register that stores eight bits of data, capturing the logic level present on each D input at the rising edge of a common clock and presenting it on the corresponding Q outputs. In the broader logic-IC hierarchy, it belongs to the flip-flop and register family of sequential logic, a core building block of microprocessor bus interfaces. Its 3-state outputs can be disabled via an active-low output-enable (OE) pin, allowing multiple devices to share a common data bus without contention. Key features include the BiCMOS design that significantly reduces ICCZ (high-impedance supply current), full parallel access for loading all eight bits on one clock edge, and strong bipolar output drive for heavy capacitive bus loads. According to TI datasheet SCBS074C, the edge-triggered architecture guarantees that data is captured only on the rising clock edge, giving predictable setup and hold behavior in synchronous systems. Technical depth: the BCT (BiCMOS) technology combines TTL-compatible input thresholds with bipolar totem-pole output stages, delivering low dynamic supply current at high clock frequencies and high output current capability, making it superior to pure CMOS ABT/ACT predecessors for heavily loaded 5 V buses. Typical applications include buffer registers, I/O ports, bidirectional bus drivers, working registers in microprocessor systems, memory address/data latching, industrial control, and communication interfaces where reliable latching plus high bus drive are required. Design tip: control OE properly to avoid bus contention (OE low enables outputs, high forces high-Z), decouple VCC close to the pins with 0.1 uF ceramic capacitors, and drive the clock with a clean edge to avoid metastability.
SN74CBT16209ADGV - 18-Bit FET Bus-Exchange Switch | Texas Instruments
The Texas Instruments SN74CBT16209ADGV is an 18-bit FET bus-exchange switch from the Widebus family, delivering high-speed TTL-compatible bus switching or exchanging in a 48-pin TVSOP (DGV) package. It functions as a 9 x 2:2 crosspoint/exchange switch capable of data exchange between four signal ports via three data-select (S0, S1, S2) terminals, making it suitable for high-performance digital systems requiring flexible signal routing. Background: a FET bus switch is a digital interface IC that uses MOSFET pass transistors to connect or isolate buses with minimal propagation delay and very low on-state resistance. Unlike analog muxes, FET bus switches are unidirectional signal paths optimized for 5V TTL logic levels. They sit in the hierarchy of digital logic ICs (TTL/CMOS logic -> bus interface -> bus switch -> FET bus-exchange switch), serving as the building blocks for memory interleaving, card-edge bus switching, and bus arbitration in backplane designs. Key specifications include 5V nominal VCC operation, TTL-compatible input levels on the select control pins, low on-state resistance for minimal propagation delay, and an approximate propagation delay of 0.35 ns as listed by distributors. The device provides five switch connection modes between two ports, allowing engineers to route 9-bit data slices between four signal ports. A low rON enables clean high-speed switching without driving large currents through the internal pass-FETs. Architecturally, the SN74CBT16209A uses N-channel MOSFET pass gates driven by TTL-compatible level shifters, with the S0-S2 select lines decoded to one of five switch configurations. The exchange/crosspoint topology (9 x 2:2) means the part can connect any one of two buses on each side of an exchange switch to either of two buses on the opposite side, providing bidirectional bus steering in a single IC. The Widebus footprint integrates all 18 bits in one package to minimize board space. Typical applications include high-speed memory bus switching, board-to-board data routing, server backplanes, bus isolation in hot-swap systems, and graphics-card memory interface multiplexing. The 48-pin TVSOP package is well-suited for high-density card-edge designs where fine-pitch surface-mount parts are required. Design consideration: the SN74CBT16209A requires a clean 5V supply with adequate decoupling (0.1uF ceramic close to VCC pins); unused inputs must be tied to VCC through a pull-up resistor to avoid floating-select states. When migrating between the DGG, DGV, DL, and WD package variants, verify pinout compatibility because the package options differ in pitch (TVSOP vs SSOP vs ceramic flat). Unique value: this page consolidates the SN74CBT16209ADGV datasheet parameters, alternative TVSOP-48 drop-in options, and proven PCB layout tips that go beyond the TI datasheet application notes.
SN74CBT3245ADWR - Octal FET Bus Switch 5V SOIC-20 | TI
The Texas Instruments SN74CBT3245ADWR is an octal FET bus switch providing eight bits of high-speed TTL-compatible bus switching in a 20-pin SOIC (DW) package with the standard 245-type pinout. Operating from a 4.5V to 5.5V supply, the device is organized as a single 8-bit switch with one output enable (OE) control input; when OE is low, the switch connects the two 8-bit ports bidirectionally. A FET bus switch is a type of analog switch that uses N-channel MOSFET pass transistors to connect or disconnect signal paths between two ports. Within the signal-routing hierarchy, bus switches sit between logic buffers and analog multiplexers: unlike buffers they add negligible propagation delay, and unlike analog MUXes they are optimized for high-bandwidth digital bus isolation. The SN74CBT3245A belongs to the CBT (CrossBar Technology) family, optimized for low on-state capacitance and high bandwidth. Key features include a low on-state resistance of typically 5 ohms, propagation delay of less than 250 ps, and near-zero added jitter because signals pass through an analog FET path rather than a buffered logic stage. The switch supports bidirectional data flow and 5-V level handling, suited to signal switching rather than power delivery. Technically, the device is fabricated in a CMOS process achieving low static power consumption. The internal FET switch presents a low-capacitance, low-resistance path that minimizes signal distortion, and the 245-type pinout matches industry-standard octal transceiver footprints across SOIC, SSOP, TSSOP, and TVSOP package options. Typical applications include bus isolation in microprocessor systems, hot-swap and power-down isolation on backplanes, memory bus switching, and signal routing in networking and telecommunications equipment where high-speed data buses must be connected or isolated under logic control. A key design consideration: control the OE pin properly to avoid bus contention, and note this part is EOL per TI.com - plan the drop-in alternatives listed on this page for new designs.
SN74CBTLV1G125DBVR - 3.3V Single FET Bus Switch SOT-23-5 | TI
The Texas Instruments SN74CBTLV1G125DBVR is a 3.3-V, single-channel, 1:1 (SPST) FET bus switch housed in a 5-pin SOT-23 (DBV) package. It provides a 5-ohm (typ) on-state resistance rail-to-rail switch path between two ports, with an active-low output enable (OE) input and Ioff support for partial-power-down mode operation. A bus switch (also called a FET switch or pass-gate switch) is a digital building block that replaces mechanical relays and discrete MOSFET switches in CMOS logic designs. The CBTLV family uses parallel n-channel and p-channel MOSFETs to provide a low-resistance bidirectional connection when enabled, achieving propagation delays under 0.25 ns. Bus switches sit within the logic-IC hierarchy as signal switches, above multiplexers and below general-purpose logic gates, and are essential for level shifting, signal multiplexing, and isolating subsystems on shared digital buses. Key features include 5-ohm typ on-resistance (ron) measured at VCC = 3.3 V, rail-to-rail switching on data I/O ports, low quiescent current of 10 uA max, and 5.5 V tolerant I/O when VCC = 0 V thanks to the Ioff isolation. The SN74CBTLV1G125 is one of the smallest 1-channel bus switches available, making it ideal for space-constrained mobile and portable designs where a single high-speed line must be routed or isolated. Architecturally, the device uses a parallel NMOS/PMOS pass gate controlled by a single OE-bar input. When OE-bar is low, both FETs turn on, creating a low-resistance channel between pin A (input) and pin Y (output); when OE-bar is high, the channel opens and the switch enters a high-impedance state. The Ioff circuitry prevents backfeeding through the switch when VCC is removed, eliminating parasitic current paths in partial-power-down or hot-swap scenarios. Typical applications include USB type-C signal routing and protection, I2C/UART bus isolation in battery-powered devices, SD card muxing, GPIO expansion, and reset signal gating in microcontroller-based designs. The SOT-23-5 footprint makes the part convenient for hand-rework on prototype boards. When designing with this device, place a 1 nF to 10 nF decoupling capacitor as close as possible to the VCC pin and observe ESD precautions when handling the small-outline package. Pull-up on OE-bar ensures defined behavior during power-up sequencing in microcontrollers with high-impedance control pins. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
SN74CBTLV3257PWR - 4-Bit 2:1 FET Mux 5Ω | TI
The Texas Instruments SN74CBTLV3257PWR is a low-voltage 4-bit 1-of-2 FET multiplexer/demultiplexer designed for 3.3-V operation. It provides four independent 2:1 (SPDT) analog switch channels in a compact 16-pin TSSOP (PW) package, enabling high-speed signal routing with minimal propagation delay and low ON-state resistance. A multiplexer/demultiplexer is a signal-routing switch that directs one of several inputs to a common output, or vice versa. Within the logic and signal-switching hierarchy, the SN74CBTLV3257 belongs to the CBTLV family of bus (FET) switches, which sit between simple logic gates and full analog multiplexer ICs, optimized for low capacitance and low ON-resistance to preserve signal integrity. Key features include a typical ON-state resistance of 5 ohms, an operating supply range of 2.3 V to 3.6 V, and a partial-power-down mode that places I/Os in high impedance when VCC is 0 V. I/Os are over-voltage tolerant to 5 V, allowing mixed-voltage signaling. The 16-pin TSSOP package measures 5 mm x 6.4 mm with a 0.65-mm pitch for space-constrained PCBs. The device uses a pass-gate (FET) architecture that is fully bidirectional, with typical propagation delay of 0.25 ns and low channel-to-channel crosstalk. An output-enable (OE) pin drives all outputs to high impedance when low, supporting bus isolation, while the select (S) pin routes each channel between its A and B ports. Typical applications include high-speed signal routing in networking equipment, data acquisition systems, test instrumentation, and mixed-voltage bus switching in computing platforms. Low ON-resistance suits clock and data distribution where edge fidelity matters. Design tip: tie OE to VCC through a pull-up resistor to guarantee high-impedance OFF-state during power-up and power-down, per the TI/NXP datasheet, preventing bus contention during multi-rail power sequencing. Pricing as of 2026-08-30 starts near $0.27 per unit at volume.
SN74F27 - Triple 3-Input NOR Gate | Texas Instruments
The SN74F27 is a triple 3-input positive-NOR gate from Texas Instruments, part of the 74F family of bipolar logic devices. It operates from a 4.5-V to 5.5-V supply and is characterized for operation from 0°C to 70°C. The device contains three independent 3-input NOR gates that perform the Boolean function Y = A + B + C in positive logic. Available in multiple package options including SOIC, PDIP, and ceramic DIPs, the SN74F27 is designed for high-speed logic applications where propagation delay and output drive are critical. A NOR gate is a digital logic gate that outputs a HIGH signal only when all of its inputs are LOW. In the context of logic families, the 74F series is a high-speed bipolar family that offers a balance between speed and power consumption, making it suitable for applications that require fast switching without the higher power of ECL. The SN74F27 is a fundamental building block in digital systems, used to implement logic functions, combinational circuits, and as a component in larger integrated systems. Key features of the SN74F27 include a typical propagation delay of 5.5 ns, which enables high-speed operation in clocked systems. The device provides a standard TTL-compatible output that can drive up to 20 mA, allowing direct connection to other TTL logic or LEDs. The wide operating voltage range of 4.5 V to 5.5 V ensures compatibility with 5-V logic systems, and the device is available in industry-standard packages such as SOIC-14 and PDIP-14, facilitating easy PCB integration. Technically, the SN74F27 uses a bipolar junction transistor (BJT) process, which provides high output drive capability and fast edge rates. The device features a totem-pole output stage that can source and sink current, ensuring robust signal integrity in noisy environments. The input structure includes clamping diodes for ESD protection, and the device is designed to meet the JEDEC standard for TTL logic levels, ensuring interoperability with other 74-series logic. Typical applications for the SN74F27 include address decoding in memory systems, logic function generation in control units, and as a building block in arithmetic logic units (ALUs). Its high speed makes it suitable for data path logic in processors and digital signal processing circuits. The device is also used in test and measurement equipment where precise timing is required. When designing with the SN74F27, it is important to ensure proper decoupling of the power supply with a 0.1-µF capacitor placed close to the VCC pin. Unused inputs should be tied to a defined logic level, either VCC or GND, to prevent floating inputs that can cause excessive power consumption and unpredictable behavior. The device's output can drive up to 20 mA, but for higher current loads, a buffer or driver should be used.
SN74HC109 - Dual J-K Flip-Flop with Clear/Preset | TI
The SN74HC109 is a dual J-K positive-edge-triggered flip-flop with clear and preset, manufactured by Texas Instruments. It operates over a wide voltage range of 2V to 6V, features low input current of 1 µA max, and can drive up to 10 LSTTL loads. Available in multiple packages including 16-pin DIP (N), SOIC (D), and SOP (NS). A J-K flip-flop is a sequential logic device that toggles its output based on the J and K inputs at the rising edge of the clock. It is a fundamental building block in digital electronics, used for counters, registers, and state machines. The SN74HC109 belongs to the 74HC family of high-speed CMOS logic, which combines the speed of LSTTL with the low power consumption of CMOS. Key features include two independent flip-flops with preset (PRE) and clear (CLR) inputs, positive-edge triggering, and a typical propagation delay of 12 ns. The device operates from 2V to 6V, with a maximum quiescent current of 40 µA, making it suitable for battery-powered applications. The outputs can drive up to 10 LSTTL loads, ensuring compatibility with TTL logic. The SN74HC109 uses high-speed CMOS technology, providing a balanced combination of speed and power efficiency. The positive-edge-triggered design ensures predictable timing behavior, while the asynchronous PRE and CLR inputs allow immediate setting or resetting of outputs regardless of clock state. This makes it ideal for applications requiring reliable state control. Typical applications include digital counters, frequency dividers, shift registers, and control logic in industrial automation, consumer electronics, and communication systems. Its wide voltage range and low power consumption make it suitable for portable and battery-operated devices. When designing with the SN74HC109, ensure proper decoupling of the power supply with a 0.1 µF capacitor near the VCC pin. Unused inputs should be tied to VCC or GND to avoid floating states. The setup and hold times must be respected to guarantee reliable operation.
SN74HC126QPWRQ1 - Quad 3-State Buffer AEC-Q100 | Texas Instruments
The Texas Instruments SN74HC126QPWRQ1 is an AEC-Q100 qualified quadruple bus buffer gate with 3-state outputs, containing four independent non-inverting buffers with individual active-high output-enable (OE) pins, housed in a 14-pin TSSOP (PW) package. The device operates from a 2 V to 6 V single supply and provides CMOS-logic-compatible buffering for bus driving, line driving, and signal isolation in automotive electronic systems. A buffer with 3-state outputs is a digital logic element that passes its input level to the output when enabled and presents a high-impedance (Hi-Z) state when disabled, allowing multiple devices to share a common bus. Within the logic hierarchy, it belongs to the buffer/line-driver family of high-speed CMOS (HC) logic, itself a branch of the broader CMOS voltage-regulated logic category used in nearly every digital system. Key features include four independent 1-bit buffers with separate OE control per channel, active-high enable inputs (the OE low state disables the output), and automotive qualification per AEC-Q100 for operation in harsh environments. The HC CMOS process delivers low static power consumption and balanced drive characteristics across the 2 V to 6 V operating range, with TTL-friendly noise margins at 5 V. The 74HC126 architecture derives from the industry-standard 74126 pinout: each gate passes input A to output Y when OE is high; when OE is low the output enters Hi-Z. TI recommends tying OE to GND through a pull-down resistor during power-up and power-down to guarantee the high-impedance state, preventing bus contention in shared-bus systems such as microcontroller data buses and memory interfaces. Typical applications include automotive body electronics and infotainment bus isolation, industrial PLC I/O line driving, and microcontroller GPIO buffering where tri-state control prevents driver conflicts. The TSSOP-14 package suits space-constrained automotive modules. Design consideration: keep unused inputs (especially OE) tied to a defined logic level through a pull resistor; floating enables can cause unpredictable bus contention and increased supply current. This page synthesizes distributor pricing, drop-in alternatives including Schmitt-trigger and AHC variants, and practical design notes not found in the manufacturer datasheet. Pricing data is as of 2026-09-10.
SN74HC165PW - 8-Bit Parallel-Load Shift Register | Texas Instruments
The Texas Instruments SN74HC165PW is an 8-bit parallel-load shift register from the SN74HC series, housed in a 16-pin TSSOP (PW) package. Operating across a wide 2V to 6V VCC range with complementary QH and QH-bar serial outputs, it converts parallel inputs to a serial stream and is rated for ±4 mA output drive at 5 V. According to the TI datasheet for the SN74HC165 family, the device supports asynchronous parallel loading via a low SH/LD-bar pulse followed by synchronous serial shifting on the CLK rising edge. A parallel-load shift register is a sequential logic device that captures multi-bit data simultaneously and then releases that data one bit per clock cycle on a serial output. These devices fall under the hierarchy of digital logic ICs -> shift registers -> parallel-in/serial-out (PISO) converters -> signal conditioning and I/O expansion. They are essential building blocks in the broader landscape of CMOS logic, including counters, multiplexers, and decoders, where GPIO counts are limited but multiple input signals must be read efficiently by a microcontroller. Key features include gated clock inputs (CLK and CLK INHIBIT), a serial-in (SER) input for cascading, direct overriding parallel data inputs (A through H), and CMOS-compatible low-power consumption with 80 µA maximum ICC. The device is also specified for a typical propagation delay of around 13 ns at 5 V and tolerates 10 LSTTL loads, giving significant drive margin. Its TSSOP-16 footprint is a popular surface-mount choice for compact designs. Typical applications include expanding microcontroller input ports for reading multiple pushbuttons, keypad scanning, DIP-switch polling, and reading multi-channel sensor arrays (e.g., 8-channel temperature or switch-contact inputs) using only two or three GPIO pins. The wide operating voltage and CMOS-friendly thresholds make it useful in 3.3 V and 5 V mixed-signal boards. When designing with the SN74HC165PW, debounce mechanical inputs at the source or via software filtering because the shift register has no built-in debounce. The complementary outputs (QH and QH-bar) are useful for differential signalling or chained-shift cascading across multiple devices without extra glue logic.
SN74HC165PWR - 8-Bit Parallel-Load Shift Register | TI | TSSOP-16
The Texas Instruments SN74HC165PWR is an 8-bit parallel-load shift register in a 16-pin TSSOP (PW) package, providing wide operating voltage range of 2V to 6V with typical tpd of 13 ns at 5V. It features complementary serial outputs (Q7 and Q7-bar) and gated clock enable, making it a workhorse for parallel-to-serial expansion in microcontroller-based designs. A shift register is a sequential logic device that converts between parallel and serial data formats, falling within the broader categories of sequential logic, digital logic IC, and finally semiconductor. The HC family (High-speed CMOS) operates at CMOS logic levels with TTL-compatible thresholds, providing low power consumption (80 uA max Icc) and balanced output drive. The '165 implements a parallel-in/serial-out (PISO) architecture: eight data inputs (A-H) are loaded asynchronously, then serially clocked out on the QH pin. This conversion allows a microcontroller with limited GPIO pins to read many switches, sensors, or buttons using only two or three pins. Key specifications include a wide 2V-6V operating voltage range, typical propagation delay of 13 ns at 5V, ±4-mA output drive at 5V, low input current of 1 uA max, and the ability to drive up to 10 LSTTL loads. The device also features complementary outputs (Q7 and Q7-bar), direct overriding load data inputs, and a gated clock enable pin for hardware-level clock gating. The SN74HC165 uses a master-slave flip-flop architecture with eight D-type latches feeding an internal shift register. The asynchronous load feature (active-low SH/LD-bar) overrides clocking, allowing immediate parallel capture. This dual-mode operation makes it equally suitable for capturing transient input states (button presses) and streaming serial data (sensor daisy chains). The wide VCC range supports both 3.3V and 5V systems, with TTL-compatible inputs simplifying connection to legacy logic. Typical applications include multi-button input scanning (keypads), input expansion for microcontrollers with limited GPIO, LED matrix driving, industrial control panel scanning, and serial data daisy-chaining for sensor arrays. The cascadable serial output allows multiple '165 devices to be chained, expanding input capacity without additional microcontroller pins. When designing with this part, consider the SH/LD-bar timing: data must be stable before SH/LD-bar returns high to avoid metastable propagation. Place a 0.1 uF decoupling capacitor close to VCC pin, and use series termination resistors on long clock lines to limit ringing. This page synthesizes TI datasheet specifications, current distributor pricing, verified drop-in alternatives, and practical design notes beyond what a single manufacturer datasheet provides.
SN74HC21-Q1 - Dual 4-Input AND Gate, 2-6V | TI
The Texas Instruments SN74HC21-Q1 is an automotive-qualified dual 4-input positive-AND gate in the HC (High-Speed CMOS) logic family, operating from a wide 2 V to 6 V supply with 5.2 mA output drive strength. The device contains two independent 4-input AND gates performing the Boolean function Y = A • B • C • D in positive logic, and is AEC-Q100 qualified for automotive applications. A logic gate is the fundamental building block of digital circuits, performing a Boolean operation on one or more binary inputs to produce a single binary output. Within the logic IC hierarchy, the AND gate family, the 74HC High-Speed CMOS series, and the broader CMOS logic category place this device among the most widely standardized components in electronics. The HC family combines CMOS low static power with TTL-like speed, making 74HC devices broadly interchangeable across semiconductor vendors. Key features include a wide 2 V to 6 V operating range supporting 3.3 V, 5 V, and mixed-voltage automotive rails, a typical propagation delay of 11 ns at 5 V, and ±4 mA output drive at 5 V allowing the outputs to drive up to ten LSTTL loads. Input current is extremely low at 1 uA maximum, and quiescent supply current is only 20 uA maximum, minimizing standby power in always-on automotive modules. Technically, the device uses HC CMOS architecture with rail-to-rail CMOS input thresholds, providing high noise immunity (typically 28% of VCC) and balanced drive. The automotive catalog variant is characterized across the extended AEC-Q100 temperature range with enhanced process controls and documentation. Typical applications include safety-interlock gating in automotive body modules, enable gating for power sequences, sensor qualification logic in ADAS perception modules, and general glue logic in ECU, gateway, and instrument-cluster boards. Design tip: tie all unused gate inputs to VCC or GND - never leave CMOS inputs floating, or both transistors can conduct and increase current draw. Keep decoupling (100 nF) close to VCC pin 14 for switching-transient control.
SN74HC21DR - Dual 4-Input AND Gate SOIC-14 | Texas Instruments
The Texas Instruments SN74HC21DR is a dual 4-input positive-AND logic gate belonging to the high-speed CMOS (74HC) family, operating from a 2 V to 6 V supply with 5.2 mA output drive strength, delivered in a 14-pin SOIC (D) package rated from -40C to +85C. A logic AND gate is a fundamental digital building block whose output asserts HIGH only when all of its inputs are HIGH. The SN74HC21 integrates two such gates on one silicon die, making it part of the broader logic IC hierarchy: gate -> combinational logic -> small-scale integration (SSI) -> 74HC CMOS family -> digital logic IC. Its function directly replaces the older LS/TTL 74LS21 in 5 V systems while adding CMOS advantages. Key features include a wide 2 V to 6 V operating range covering 3.3 V, 5 V, and legacy 6 V rails; outputs that can drive up to 10 LSTTL loads; typical propagation delay of 11 ns at 5 V; plus/minus4 mA output drive at 5 V; and very low power consumption with a maximum ICC of only 20 uA. Maximum input current is just 1 uA, easing fan-out and pull-up resistor design. Technically, the HC family uses CMOS technology with inputs that include clamp diodes, permitting interface to voltages slightly above VCC through current-limiting resistors. The balanced push-pull output stage delivers symmetric rise/fall times and rail-to-rail output swing, unlike bipolar TTL which loses headroom. Typical applications include enable-signal gating in industrial controllers, safety interlock logic where multiple conditions must all be true, address decoding, and general glue logic in 3.3 V and 5 V embedded systems. Design-wise, keep unused inputs tied to VCC or GND; never leave 4-input AND inputs floating, or noise can propagate to the output. Decouple VCC with 100 nF ceramic close to pin 14. This page synthesizes distributor pricing, verified drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet alone.
SN74HC21PWR - Dual 4-Input AND Gate, 2-6V | TI
The Texas Instruments SN74HC21PWR is a dual 4-input positive-AND gate logic IC operating from a 2V to 6V supply, delivering 5.2 mA output drive strength at 6V in a 14-pin TSSOP (PW) package rated from -40C to +85C. An AND gate is a fundamental combinational logic device that outputs a logic HIGH only when all of its inputs are logic HIGH. Within the digital IC hierarchy, the SN74HC21 belongs to the family of gates and inverters, which are the simplest building blocks of the broader CMOS logic category and form the basis of state machines, address decoding, enable-logic generation, and glue logic in embedded systems. The HC (High-Speed CMOS) family combines CMOS low static power with TTL-compatible drive capability. Key features of the SN74HC21 include its wide 2V to 6V operating range, which supports both legacy 5V systems and 3.3V designs; outputs that can drive up to 10 LSTTL loads; and low power consumption of only 20 uA (maximum) supply current, making it suitable for battery-powered equipment. Each gate performs the Boolean function Y = A AND B AND C AND D in positive logic. Technically, the HC family uses silicon-gate CMOS technology, giving balanced push-pull outputs, high input impedance, and rail-to-rail output swing. At VCC = 4.5V the device delivers 5.2 mA drive strength, and typical propagation delays are in the low nanosecond range, adequate for general-purpose control logic. Typical applications include address decoding and chip-enable generation in microcontroller systems, safety interlock logic where multiple conditions must be true simultaneously, industrial control panels, and power-supply enable sequencing. A key design consideration: the HC family inputs are not Schmitt-triggered, so slowly rising signals (for example from RC delays) should be buffered by a Schmitt-input device such as the SN74HCS21 to avoid oscillation. This page synthesizes distributor pricing, verified drop-in alternatives, a complete TSSOP-14 pinout, and practical design notes not found in the manufacturer datasheet.
SN74HC21QPWRG4Q1 - Dual 4-Input AND Gate AEC-Q100 | TI
The Texas Instruments SN74HC21QPWRG4Q1 is an automotive-qualified (AEC-Q100) dual 4-input positive-AND gate logic IC operating from a 2 V to 6 V supply with 5.2 mA output drive strength, housed in a 14-pin TSSOP (PW) package rated from -40C to +125C. A logic AND gate is a fundamental combinational digital device whose output goes high only when all of its inputs are high; within the logic IC hierarchy it sits under gates and inverters, which in turn belong to the broader family of small-scale integration (SSI) CMOS logic. The HC (High-Speed CMOS) family descends from the original 7400 TTL series but is fabricated in CMOS, giving it far lower static power consumption and a wide 2V-6V operating range instead of the fixed 5V TTL supply. Each of the two gates in the SN74HC21-Q1 performs the Boolean function Y = A AND B AND C AND D. Key features include the wide 2V-6V supply range for mixed-voltage systems, a maximum quiescent current of only 2 uA for battery-powered designs, and the ability to drive up to ten LSTTL loads from each output. Per the datasheet, typical propagation delay is in the nanosecond range and outputs source or sink 5.2 mA. The Q1 designation confirms AEC-Q100 qualification for automotive environments across the full -40C to +125C temperature range. Technically, the device is implemented in TI High-Speed CMOS (HC) process technology with CMOS input thresholds, delivering very low input current and rail-to-rail logic swings. The 14-pin TSSOP (PW) package with 4.40 mm body width offers a compact surface-mount footprint for dense automotive modules. Typical applications include automotive body-control modules, enable-signal gating in ECU power trees, sensor interlock logic, and industrial safety interlocks where a multi-input AND condition must be evaluated in hardware. Design consideration: tie unused inputs to VCC or GND - never leave CMOS inputs floating, or quiescent current and noise immunity degrade. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
SN74HC21QPWRQ1 - Dual 4-Input AND Gate, 2-6V | Texas Instruments
The Texas Instruments SN74HC21QPWRQ1 is an automotive-catalog dual 4-input positive-AND gate from the HC (High-Speed CMOS) logic family, operating from a wide 2 V to 6 V supply with 5.2 mA output drive strength at 6 V, housed in a 14-pin TSSOP (PW) package rated from -40C to +125C. A logic gate is the elementary building block of digital circuits, and an AND gate outputs a logic HIGH only when all of its inputs are logic HIGH. Within the logic IC hierarchy, the SN74HC21QPWRQ1 belongs to the gates-and-inverters class of combinational logic, sitting alongside buffers, flip-flops, and transceivers in a complete digital system. Each of its two independent gates performs the Boolean function Y = A - B - C - D in positive logic, accepting four inputs per gate. Key features include the wide 2 V to 6 V operating voltage range, which supports both legacy 5 V systems and modern low-voltage rails; CMOS low-power consumption with 20 uA maximum ICC; outputs that can drive up to ten LSTTL loads; and balanced CMOS push-pull outputs delivering approximately 5.2 mA of drive at 6 V. The HC family uses silicon-gate CMOS technology, providing CMOS-level noise immunity, low static power, and symmetrical rise/fall characteristics. The Q1 suffix denotes AEC-Q100 qualification for automotive applications, including extended temperature operation to +125C, making the part suitable for under-hood and body-electronics environments where consumer-grade logic would not survive. Typical applications include automotive body control modules, gate-driver enable logic in motor-control and power-supply systems, safety interlock logic combining multiple sensor conditions, and general combinational logic in industrial PLCs. The dual-gate format consolidates two AND functions into one TSSOP-14 footprint, saving board area. Design-wise, tie unused inputs to VCC or GND rather than leaving them floating, as HC-family CMOS inputs must never float. Decouple VCC with a 0.1 uF ceramic capacitor placed close to pin 14. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet alone.
SN74HC245DWR - 8-Bit 3-State Bus Transceiver | Texas Instruments
The Texas Instruments SN74HC245DWR is an 8-bit, non-inverting CMOS bus transceiver with 3-state outputs, supplied from 2 V to 6 V and packaged in a 20-pin SOIC. It provides bidirectional asynchronous data transfer between the A and B buses, with high-current outputs capable of driving 15 LSTTL loads. The DIR input selects transmission direction, while the output-enable input places all eight outputs in a high-impedance state when the bus must be released. A bus transceiver is a logic-interface device that connects two digital buses while allowing each side to drive the other in a controlled sequence. The SN74HC245 belongs to the 74HC CMOS logic family, combining low-power CMOS operation with TTL-compatible high-current outputs. Its eight parallel channels are useful for processor, peripheral, memory, and industrial-control data paths where a shared bidirectional bus must avoid contention. Key features include a 2 V to 6 V operating supply range, 8-bit parallel operation, 3-state output control, and propagation-delay performance specified for bus-oriented digital systems. The device is designed for asynchronous two-way communication, and its control implementation minimizes external timing requirements. The non-inverting architecture preserves the logical state of each data bit while transferring it in either direction. The SN74HC245DWR is useful when several devices share a bus and only one device should actively drive the line at a time. DIR determines whether data travels from A to B or B to A, and the output-enable control provides a common way to disconnect the transceiver during reset, idle periods, arbitration, or bus multiplexing. Because outputs can be disabled, the device helps prevent driver contention when multiple bus agents share the same conductors. Typical applications include microprocessor and microcontroller bus isolation, parallel peripheral interfaces, memory-bus fanout, test and measurement equipment, communications equipment, and industrial control systems. Designers should check timing margins, enable sequencing, and input/output loading against the specific bus architecture. For high-speed or long interconnect paths, trace topology, capacitance, and signal-integrity margin should be evaluated rather than relying only on the nominal propagation delay. This page combines manufacturer specifications, distributor availability references, application guidance, and verified comparison data to support component selection and PCB-compatible replacement decisions.
SN74HC4060 - 14-Stage Binary Counter & Oscillator | TI
The SN74HC4060 is a 14-stage asynchronous binary counter with an integrated oscillator section, manufactured by Texas Instruments. It operates over a wide voltage range of 2V to 6V, features a typical propagation delay of 14 ns, and can drive up to 10 LSTTL loads. The device is available in multiple package options including 16-SOIC (D), 16-PDIP (N), and 16-TSSOP (PW), making it suitable for a variety of PCB layouts. A binary counter is a digital circuit that counts in binary sequence, incrementing on each clock pulse. The SN74HC4060 specifically is an asynchronous (ripple) counter, meaning each stage's output triggers the next, resulting in a simple but effective frequency division. It belongs to the 74HC family of high-speed CMOS logic, which combines the low power consumption of CMOS with the speed of TTL. The oscillator section allows the device to generate its own clock signal using either an RC network or a crystal, eliminating the need for an external clock source. Key features include a 14-stage ripple-carry binary counter, an integrated oscillator supporting RC or crystal configurations, a master reset (CLR) input that disables the oscillator and clears the counter, and a clock input (CLKI) that increments the counter on high-to-low transitions. The device also offers a low input current of 1 µA max and a low power consumption of 80 µA max ICC, making it ideal for battery-powered applications. Technically, the SN74HC4060 uses high-speed CMOS technology, providing a balanced combination of speed and power efficiency. The oscillator section can be configured with external components to generate frequencies from sub-Hz to several MHz, depending on the RC or crystal values. The counter stages divide the oscillator frequency by powers of two, allowing precise frequency division for timing applications. The clear function ensures the counter can be reset to zero at any time, which is essential for synchronized operations. Typical applications include frequency dividers, timers, and oscillator circuits in consumer electronics, industrial control systems, and communication devices. For example, it can be used to generate precise time delays in microcontroller systems or to divide a crystal oscillator frequency down to a usable clock for peripherals. Its wide operating voltage range and robust output drive make it compatible with both 3.3V and 5V logic systems. When designing with the SN74HC4060, ensure that the oscillator components are placed close to the IC to minimize parasitic capacitance and noise. For crystal oscillators, use the recommended load capacitors as specified in the datasheet. Also, consider the counter's asynchronous nature, which may introduce glitches on outputs; adding output flip-flops can synchronize the count if needed.
SN74HC86N - Quad 2-Input XOR Gate, 14-PDIP | Texas Instruments
The Texas Instruments SN74HC86N is a quadruple 2-input Exclusive-OR (XOR) gate belonging to the broad 74HC high-speed CMOS logic family, supplied in a 14-pin PDIP (N) through-hole package. It integrates four independent 2-input XOR gates on a single die, each performing the Boolean function Y = A XOR B in positive logic, with a typical quiescent current in the microampere range and 5.2 mA balanced output drive strength. Operating from a 2 V to 6 V VCC supply, it delivers CMOS-level low-power consumption with TTL-compatible input thresholds. An XOR gate is a fundamental combinational logic primitive that outputs a HIGH whenever its two inputs differ. In digital system hierarchies, XOR gates sit alongside AND, OR, and NOT gates as building blocks of arithmetic logic units, parity generators, comparators, and crypto primitives. The 74HC86 places four such gates in one package, reducing board area and interconnect length for glue logic. Key features of the SN74HC86N include ±5.2 mA output drive, wide 2 V to 6 V supply range, low input current of ±1 µA, typical propagation delay around 13 ns at 5 V/15 pF, and ±20 µA quiescent supply current. Its CMOS outputs produce rail-to-rail logic swings, simplifying interfacing with downstream CMOS loads. The HC family is pin-compatible with the LS TTL legacy while consuming a fraction of the power. Architecturally, the SN74HC86 uses a CMOS NAND/NOR-equivalent XOR topology realized with complementary pull-up and pull-down networks. The high-speed CMOS process delivers sub-15 ns gate delay at 5 V while keeping static dissipation negligible. Inputs are CMOS with Schmitt-trigger-like hysteresis improving noise immunity in noisy industrial environments. Typical applications include parity generation and checking in memory and communication systems, half-adder and full-adder construction, controlled inverters, programmable logic replacement, and signal conditioning for comparators. Designers also use XOR gates for phase detectors in PLLs, simple encryption/decryption stages, and switch-debounce or edge-detection circuits. When designing with the SN74HC86N, observe standard CMOS handling rules: tie unused inputs to VCC or GND through a resistor to prevent floating inputs that draw shoot-through current. The 14-PDIP package is suitable for breadboards, prototypes, and legacy through-hole assemblies where surface-mount land patterns are not desired. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a decision-ready snapshot of the SN74HC86N.
SN74HC86NE4 - Quad 2-Input XOR Gate, 14-PDIP | Texas Instruments
The Texas Instruments SN74HC86NE4 is a quadruple 2-input Exclusive-OR (XOR) gate IC fabricated in high-speed CMOS silicon-gate technology, providing four independent XOR gates in a 14-pin PDIP (plastic DIP) through-hole package. Each of the four gates performs the Boolean function Y = A XOR B in positive logic, with buffered outputs capable of driving 10 LSTTL loads and a wide 2 V to 6 V operating voltage range. The 'NE4' suffix indicates a Pb-free, RoHS-compliant assembly variant of the SN74HC86N, identical electrically but compliant with contemporary lead-free soldering and environmental standards. The device typically exhibits 6 ns propagation delay at 5 V C_load = 50 pF, 5.2 mA output drive strength, and a ±20 µA input leakage at 6 V, suiting it for bus-oriented digital logic designs. What is an XOR gate? An XOR (Exclusive-OR) gate is a fundamental two-input digital logic primitive whose output is HIGH only when the two inputs differ. Positioned within the broader gates-and-inverters IC category, XOR gates sit alongside AND, OR, NAND, NOR, and INVERTER cells, and are widely deployed in parity generators, comparators, half adders, controlled inverters, and arithmetic logic units. A single HC86 device packs four independent XOR gates into one 14-pin package, saving board area and reducing part count versus discrete implementations. Key features include balanced CMOS outputs, low input current of ±1 µA maximum, significant power-reduction versus LSTTL equivalents, and an operating temperature range of -40 °C to +85 °C suitable for industrial applications. The HC family also provides high noise immunity (typically 30% of V_CC as the noise margin) and supports fan-out to 10 LSTTL loads, simplifying interface to legacy bipolar logic without level shifters. Clamp diodes on the inputs allow voltages up to 1.5 V above V_CC without damage. Architecturally, the SN74HC86NE4 uses a silicon-gate CMOS process to deliver HCMOS-equivalent speed at one-fifth the static power of LSTTL. Its TTL-compatible input thresholds (V_IL ≈ 0.9 V at 5 V, V_IH ≈ 3.15 V) allow direct interfacing with legacy bipolar logic without external pull-ups. The four gates are partitioned symmetrically as 1A/1Y, 2A/2Y, 3A/3Y, 4A/4Y to ease PCB routing, and an internal thermal-shutdown feature is absent (CMOS logic is inherently current-limited by design). Typical applications include parity generation and checking in data communication busses, half and full adder construction for low-bit arithmetic, true/complement control logic for op-amp switching, phase-detector networks in PLL synthesizers, and address decoders in memory systems. Designers also use the HC86 for binary-to-Gray code conversion, which is essential in optical encoders and shaft position decoding. When designing with this part, ensure unused inputs are tied to V_CC or GND through 1 kΩ pull-down/up resistors rather than left floating to prevent excess current and propagation of noise through the CMOS input stages. Operating above 6 V will damage the device; operating below 2 V disables the internal logic thresholds and produces undefined outputs. This page synthesizes current distributor pricing, AEO-optimized FAQ entries, verified drop-in alternatives, and practical design notes that extend the manufacturer datasheet with engineering-grade decision support.
SN74HCS126QPWRQ1 - Automotive Quad 3-State Buffer | TI
The Texas Instruments SN74HCS126QPWRQ1 is an AEC-Q100 qualified automotive quadruple bus buffer with 3-state outputs and Schmitt-trigger inputs, housed in a 14-pin TSSOP (PW) package rated from -40C to +125C. The device operates from a 2.0 V to 6.0 V supply and buffers four non-inverting 1-bit channels with active-high output-enable pins. A CMOS logic buffer is a digital building block that reproduces (non-inverting) a digital signal while providing isolation between a weak or noisy source and a heavier load. In the logic hierarchy, the SN74HCS126-Q1 belongs to the buffer / line driver family of the HC/HCS CMOS logic category, and bus buffers with 3-state outputs further add the ability to disconnect the output from the bus, enabling shared, multidrop data lines in microprocessor and automotive in-vehicle networking systems. Key differentiating features include Schmitt-trigger inputs with hysteresis that convert slow or noisy input transitions into clean, fast edges - essential in automotive environments with ground bounce and EMI; 3-state outputs that implement high-impedance bus sharing; low input hysteresis threshold spread across the 2.0 V to 6.0 V operating range; and a typical CMOS microamp-level quiescent current that minimizes system standby power. The device is qualified per AEC-Q100 Grade 1 for harsh automotive ambient temperatures. Technically, the HCS family combines high-voltage CMOS fabrication with input hysteresis, providing robust switching thresholds (VT+ / VT- spread) across supply voltage, temperature, and process corners. Output drive is balanced across the supply range, and outputs are disabled to high impedance whenever the OE pin is low, allowing multiple drivers on one bus with tri-state control. Power-up and power-down protection prevents bus contention during supply sequencing. Typical applications include automotive body electronics, CAN/LIN transceiver front-end buffering, level-shifted control signals in 12 V-derived rails, industrial PLC I/O, and generic bus-buffering between microcontrollers and peripheral modules where slow edges must be squared up. Design tip: do not let the OE pin float - tie unused enables to ground and unused inputs to VCC or GND; ensure each enabled output sources/sinks within the drive limits at the given VCC to keep VOL/VOH within datasheet margins. This page adds value beyond the manufacturer datasheet by synthesizing distributor pricing, drop-in same-footprint alternatives (HC126 variants, HCS125 siblings), and practical design notes in one place.
SN74HCS541PWR - Octal Buffer Schmitt 3-State TSSOP-20 | TI
The Texas Instruments SN74HCS541PWR is an octal buffer and line driver with Schmitt-trigger inputs, 3-state outputs, and a flow-through pinout, supplied in a 20-pin TSSOP (PW) package. It operates over a wide 2 V to 6 V supply range and is fully specified from -40C to +125C. What is an octal buffer/line driver? It is a digital logic IC providing eight independent buffer channels capable of driving bus lines or long PCB traces. The 3-state outputs allow each device to release the bus into a high-impedance state, enabling multi-device bus sharing, while Schmitt-trigger inputs add hysteresis that converts slow or noisy input edges into clean logic transitions. The SN74HCS541 belongs to the HCS (High-speed CMOS with Schmitt-trigger) logic family, combining CMOS low power with TTL-compatible drive. Key features include the 2 V to 6 V operating range for 3.3 V and 5 V mixed-voltage systems, typical 0.4 V input hysteresis at 4.5 V for superior noise immunity, dual active-low output enables (OE1 and OE2, both must be low to activate outputs), and only 20 uA typical quiescent current at 6 V. Outputs sink or source up to 6 mA at 4.5 V, suitable for driving LEDs, relays, or additional logic inputs. Fabricated in silicon-gate CMOS, the device balances switching speed with low power dissipation. The flow-through pinout places inputs on one side and outputs on the opposite side, simplifying PCB routing and reducing crosstalk in bus-oriented layouts. Typical applications include microcontroller bus buffering, memory address/data line driving, sensor signal conditioning, and interfacing 3.3 V logic to 5 V domains in industrial automation and automotive-adjacent systems. Design tip: control the OE pins carefully to avoid bus contention, place 0.1 uF decoupling capacitors close to VCC/GND, and keep input rise times below 500 ns at 2 V and 200 ns at 6 V for best performance.
SN74HCS541QPWRQ1 - AEC-Q100 Octal Buffer 3-State | TI
The Texas Instruments SN74HCS541QPWRQ1 is an automotive-qualified (AEC-Q100) octal buffer and line driver featuring eight non-inverting channels with 3-state outputs, Schmitt-trigger inputs, and a flow-through pinout, supplied in a 20-pin TSSOP (PW) package rated from -40C to +125C. An octal buffer/line driver is a digital logic IC in the CMOS logic family that provides signal buffering, drive-current amplification, and bus isolation between a controller and its loads. Within the logic hierarchy, it belongs to the buffer and line-driver category of specialty logic, sitting between simple gates and full bus transceivers. The 3-state (tri-state) outputs allow multiple devices to share a common bus by high-impedance disconnection when disabled. Key features include Schmitt-trigger inputs with hysteresis that tolerate slow or noisy input edges typical of automotive harnesses, wide VCC operation of the HCS Schmitt-CMOS family, two independent active-low output-enable pins (OE1 and OE2) for flexible bus control, and a flow-through pinout that simplifies PCB routing by keeping inputs on one side and outputs on the other. The Q1 grade ensures AEC-Q100 qualification and PPAP support for automotive designs. The HCS (HC with Schmitt input) architecture combines high-speed CMOS output drive with hysteresis-enhanced input stages, improving noise margin on long or filtered signal lines. Outputs are non-inverting, so logic polarity is preserved, making the device suitable for address and control bus buffering in MCU-based systems. Typical applications include automotive body electronics and ADAS control modules, buffering GPIO or SPI/control lines from MCUs such as the TMS320F2800xx series, industrial PLC I/O isolation, and level-tolerant interfacing to switches and sensors with slow edge rates. Design tip: tie both OE pins low for always-enabled operation, and keep VCC decoupling (100 nF ceramic) close to the supply pins; the Schmitt inputs allow RC-filtered inputs but do not eliminate the need for controlled signal routing.
SN74HCS86PWR - Quad 2-Input XOR Schmitt-Trigger Gate | TI
The Texas Instruments SN74HCS86PWR is a quadruple 2-input XOR (exclusive OR) gate with Schmitt-trigger inputs, supplied in a 14-pin TSSOP (PW) surface-mount package. It operates from a 2V to 6V supply and is fully specified from -40C to +125C for industrial environments. A logic gate is the fundamental building block of digital electronics, performing Boolean operations on binary inputs. The XOR gate outputs a high level only when an odd number of its inputs is high, making it essential for adders, parity generators and checkers, comparators, and programmable inverters. The SN74HCS86 belongs to the TI HCS family, which pairs CMOS low static power with Schmitt-trigger inputs for superior noise immunity - a drop-in upgrade path for the classic 74HC86. Key features include the wide 2V to 6V operating range, Schmitt-trigger inputs with hysteresis (typically around 0.5V at a 5V supply), CMOS technology for near-zero quiescent current, and balanced output drive. Per the TI datasheet, the device can drive loads up to 50 pF while meeting all datasheet specifications; larger capacitive loads are not recommended. Technically, the CMOS architecture provides high noise margins and negligible static current, while the Schmitt inputs use internal positive feedback to create hysteresis. This makes the part tolerant of inputs from mechanical switches, quadrature encoders, RC oscillators, and long wires with slow rise times - conditions that would cause a standard HC86 input to oscillate or multi-trigger. Typical applications include signal conditioning of noisy sensor or switch inputs, parity generation in serial communication links, crystal and RC oscillator circuits, frequency doubling (XOR with a delayed copy of itself), and digital comparator functions in industrial control, instrumentation, and automotive modules. Design tip: tie all unused inputs to a defined logic level (GND or VCC) to prevent floating nodes, and keep total capacitive load per output at or below 50 pF; add a buffer such as SN74LVC244A if heavier loads are required. Pricing references below are as of 2026-08-30.