SN74LV3T99-Q1 - 3ch Configurable Gate, 1.8-5.5V | TI
N.º de pieza: SN74LV3T99-Q1 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $0.85 | $0,85 |
| 10 | $0.77 | $7,70 |
| 100 | $0.6 | $60,00 |
| 500 | $0.49 | $245,00 |
| 1.000 | $0.41 | $410,00 |
SN74LV3T99-Q1 Descripción general
Configurable logic gates are digital ICs that let designers implement multiple logic functions in a single device, selected by pin strapping. They belong to the broader standard logic IC family - fundamental building blocks providing glue logic, level shifting, and signal conditioning in digital systems. The SN74LV3T99-Q1 sits within the LV (Low-Voltage) CMOS family and additionally functions as a logic-level shifter between voltage domains.
Key features include three independent four-input gates with 3-state outputs for bus-oriented applications, Schmitt-trigger inputs providing hysteresis for superior noise immunity, and a wide 1.8V to 5.5V supply range enabling translation between 1.8V, 2.5V, 3.3V, and 5V logic families. AEC-Q100 qualification guarantees operation from -40C to +125C per automotive reliability requirements.
Technically, the device uses CMOS technology for low static power consumption and high noise immunity. The configurable architecture replaces multiple discrete gates with one device, reducing board space and BOM count. The Boolean function supports MUX, AND, OR, NAND, NOR, XOR, XNOR, inverter, and buffer configurations - 16 output patterns determined by the 4-bit input when OE is low - while the output-enable (OE) input permits multiple devices to share a common bus through a high-impedance state.
Typical applications include automotive body control modules, infotainment systems, and industrial automation, where the device handles signal conditioning, level shifting, and custom logic. The Schmitt-trigger inputs reliably interface sensors, switches, and microcontrollers in noisy environments. Test and measurement equipment also uses configurable logic for signal routing and control.
Design tip: place 0.1uF decoupling capacitors close to the power pins, and carefully control the 3-state output-enable signals to avoid bus contention.
Alternativas directas para SN74LV3T99-Q1 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con SN74LV3T99-Q1 (mismo factor de forma y huella) — difiere en Inputs per Gate, Logic Function, Number of Gates, Supply Voltage Range, Technology Family.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
SN74LV3T99PWR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SN74LV3T99QPWRQ1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SN74LV3T99-Q1 Valores máximos y características eléctricas
| Logic Function | Configurable: Y = (A • /C + B • C) ⊕ D |
| Number of Gates | 3 independent gates |
| Inputs per Gate | 4 |
| Tipo de salida | 3-state |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Input Type | Schmitt-trigger |
| Selectable Functions | MUX, AND, OR, NAND, NOR, XOR, XNOR, inverter, buffer |
| Output Enable | OE pin; output disabled when OE is high |
| Level Shifting | Yes (logic-level translator function) |
| Automotive Qualification | AEC-Q100 qualified |
| Temperatura de funcionamiento | -40C to +125C |
| Technology Family | LV-CMOS |
| Encapsulado | 20-TSSOP (PW) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| Número de pines | 20 |
Configuración de pines de SN74LV3T99-Q1
| Pin 1 | 1OE — Output enable gate 1 (3-state, disabled when high) |
| Pin 2 | 1A — Data input A gate 1 |
| Pin 3 | 1B — Data input B gate 1 |
| Pin 4 | 1C — Data input C gate 1 |
| Pin 5 | 1D — Data input D gate 1 |
| Pin 6 | 2OE — Output enable gate 2 |
| Pin 7 | 2A — Data input A gate 2 |
| Pin 8 | 2B — Data input B gate 2 |
| Pin 9 | 2C — Data input C gate 2 |
| Pin 10 | GND — Ground |
| Pin 11 | 2D — Data input D gate 2 |
| Pin 12 | 2Y — 3-state output gate 2 |
| Pin 13 | 3OE — Output enable gate 3 |
| Pin 14 | 3A — Data input A gate 3 |
| Pin 15 | 3B — Data input B gate 3 |
| Pin 16 | 3C — Data input C gate 3 |
| Pin 17 | 3D — Data input D gate 3 |
| Pin 18 | 3Y — 3-state output gate 3 |
| Pin 19 | 1Y — 3-state output gate 1 |
| Pin 20 | VCC — Power supply, 1.8V to 5.5V |
Aplicaciones típicas
SN74LV3T99-Q1 es adecuado para 6 aplicacións: Automotive Body Control Modules, Automotive Infotainment Systems, Industrial Automation and PLC I/O, Test and Measurement Equipment, Mixed-Voltage Level Shifting, Glue Logic for Embedded Processors.
Automotive Body Control Modules
In body control modules, the SN74LV3T99-Q1 handles switch debouncing, custom gate combinations, and 3.3V-to-5V signal translation between MCU banks and legacy actuators. Its Schmitt-trigger inputs reject noise from wiring harness transients, while AEC-Q100 qualification at -40C to +125C meets OEM reliability mandates. One configurable device replaces several discrete gates, cutting PCB area in space-constrained BCM units and enabling logic changes via pin strapping across vehicle variants.
Recomendado
Automotive Infotainment Systems
Infotainment head units mix 1.8V SoC, 3.3V memory, and 5V peripheral domains; the SN74LV3T99-Q1 bridges these as a configurable level-shifting gate with 1.8V-5.5V supply. Its 3-state outputs permit shared control buses among display, tuner, and amplifier subsystems, avoiding extra bus buffers. Schmitt inputs clean slowenable edges from power-management circuits. AEC-Q100 qualification supports in-cabin temperature and vibration requirements typical of automotive audio platforms.
Recomendado
Industrial Automation and PLC I/O
In PLC digital I/O modules, the SN74LV3T99-Q1 implements custom enable/interlock logic and conditions noisy sensor signals with its Schmitt-trigger inputs. The 1.8V-5.5V range interfaces modern 3.3V MCUs with 5V field-side circuitry, while 3-state outputs allow multiple modules to share a backplane status bus. Because functions are strap-selectable (MUX, XOR, AND, etc.), one BOM line serves multiple module variants, simplifying manufacturing and sparing for factory automation equipment.
Recomendado
Test and Measurement Equipment
Bench instruments and signal-routing fixtures use the SN74LV3T99-Q1 as a strap-configurable mux/XOR element for trigger-path selection and clock steering. The 3-state outputs enable multiple boards to drive a common timing bus without extra buffers, and Schmitt inputs restore slow analog-derived edges to clean logic levels. The 1.8V-5.5V supply accommodates mixed-voltage instruments; standard industrial temperature range and low static CMOS power suit battery-powered portable test gear.
Recomendado
Mixed-Voltage Level Shifting
Where 1.8V, 2.5V, 3.3V, and 5V domains coexist, the SN74LV3T99-Q1 serves as a configurable logic-level shifter. Configured as a buffer, each gate accepts a low-voltage input and drives a higher-voltage domain when powered at the target rail. Schmitt-trigger hysteresis tolerates the slow edges of level-translated signals. This role consolidates translation and glue logic into one 20-pin device, versus separate translators plus gates, reducing BOM count and board area in mixed-voltage systems.
Recomendado
Glue Logic for Embedded Processors
Embedded boards use the SN74LV3T99-Q1 for address decoding, chip-select combination, and read/write logic around MCUs and FPGAs. The strap-configurable inputs implement MUX or comparator-style functions without redesign, useful during prototyping and ECNs. 3-state outputs share status lines among multiple processors, and the 1.8V-5.5V supply matches common SoC I/O rails. Schmitt inputs on enable pins derived from power-good signals give glitch-free release during power sequencing.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para SN74LV3T99-Q1 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | SN74LV3T99PWR | SN74LV3T99QPWRQ1 | SN74LV3T99QDGSRQ1 |
|---|---|---|---|---|
| Package | 20-TSSOP (PW) | 20-TSSOP (PW) - same | 20-TSSOP (PW) - same | 20-VSSOP (DGS) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Gates | 3 | 3 | 3 | 3 |
| Supply Voltage | 1.8V to 5.5V | 1.8V to 5.5V | 1.8V to 5.5V | 1.8V to 5.5V |
| Schmitt-Trigger Inputs | Yes | Yes | Yes | Yes |
| 3-State Outputs | Yes | Yes | Yes | Yes |
| AEC-Q100 | Qualified (-40C to +125C) | Not qualified (industrial) | Qualified | Qualified |
| PCB Footprint Change | N/A | None - drop-in | None - drop-in | Required - smaller VSSOP |
Diferenciadores clave
- Three configurable 4-input gates in one device (frente a SN74AHCT3G99-Q1)
- AEC-Q100 qualification at standard-logic price (frente a SN74LV3T99PWR)
- Built-in logic-level shifting (frente a SN74LVC244APWR)
Notas de diseño
Place 0.1uF ceramic decoupling capacitors within 3mm of the VCC pin (pin 20) and GND (pin 10). Unused inputs must be tied to VCC or GND per TI datasheet SCAS985 - floating CMOS inputs increase quiescent current and noise susceptibility. Keep the 3-state output traces away from clock lines to minimize coupling onto high-impedance bus nodes.
Never assert two 3-state outputs on the same bus simultaneously - bus contention can exceed output current limits. Ensure OE signals have defined logic levels at power-up; add a 10k pull-up or pull-down so outputs stay in Hi-Z until the controlling MCU initializes. Verify that the strap configuration of A, B, C, D pins matches the intended Boolean function before production.
The Schmitt-trigger inputs tolerate slow edges, but for level-shifting service keep source impedance below 10k-ohm to preserve hysteresis margins. When translating 1.8V signals, confirm the input VIH threshold at the actual VCC used - consult the datasheet VIH/VIL tables per supply voltage rather than assuming 5V-referenced thresholds.
Información de cumplimiento
AEC-Q100 qualified per TI product page (-Q1 suffix). RoHS compliance per TI standard logic portfolio data; REACH and halogen-free status not stated in provided data.
