SN74HCS541QPWRQ1 - AEC-Q100 Octal Buffer 3-State | TI
N.º da peça: SN74HCS541QPWRQ1 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $0.62 | $0,62 |
| 10 | $0.56 | $5,60 |
| 100 | $0.44 | $44,00 |
| 500 | $0.36 | $180,00 |
| 1.000 | $0.3 | $300,00 |
SN74HCS541QPWRQ1 Visão geral
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.
Alternativas drop-in para SN74HCS541QPWRQ1 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com SN74HCS541QPWRQ1 (mesmo formato e footprint) — diferindo em Output Enable, Input Type, Output Type, Bits per Element, Function.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
SN74HCS541PWR
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$0.22 / unidade
Ver ficha técnica →SN74LVC244QAPWRQ1
✅ Drop-In✓ Em estoque
$0.26 / unidade
Ver ficha técnica →SN74AHC9541-Q1
⚡ Mesmo encapsulamento✓ Em estoque
Consulte o preço
Ver ficha técnica →SN74HC541APWR
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MC74HC541AFL2
⚡ Mesmo encapsulamento ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
SN74HCS541QPWRQ1 Classificações máximas e características elétricas
| Função | Octal buffer / line driver, non-inverting |
| Bits per Element | 8 |
| Elements | 1 |
| Input Type | Schmitt-Trigger |
| Tipo de saída | 3-State |
| Polarity | Non-Inverting |
| Output Enable | 2 active-low OE pins |
| Family | HCS (HC Schmitt CMOS) |
| Automotive Qualification | AEC-Q100 |
| Temperatura de operação | -40C to +125C |
| Encapsulamento | 20-TSSOP (PW) |
| Tipo de montagem | Surface Mount |
| Pinout Style | Flow-Through |
| Packaging | Tape & Reel (R) |
| Status RoHS | Compliant |
Configuração de pinos do SN74HCS541QPWRQ1
| Pino 1 | OE1 — Output enable 1 (active low) |
| Pino 2 | 1A1 — Input A1, buffer 1 |
| Pino 3 | 1A2 — Input A2, buffer 1 |
| Pino 4 | 1A3 — Input A3, buffer 1 |
| Pino 5 | 1A4 — Input A4, buffer 1 |
| Pino 6 | 2A1 — Input A1, buffer 2 |
| Pino 7 | 2A2 — Input A2, buffer 2 |
| Pino 8 | 2A3 — Input A3, buffer 2 |
| Pino 9 | 2A4 — Input A4, buffer 2 |
| Pino 10 | GND — Ground |
| Pino 11 | 2Y1 — Output Y1, buffer 2 (3-state) |
| Pino 12 | 2Y2 — Output Y2, buffer 2 (3-state) |
| Pino 13 | 2Y3 — Output Y3, buffer 2 (3-state) |
| Pino 14 | 2Y4 — Output Y4, buffer 2 (3-state) |
| Pino 15 | 1Y4 — Output Y4, buffer 1 (3-state) |
| Pino 16 | 1Y3 — Output Y3, buffer 1 (3-state) |
| Pino 17 | 1Y2 — Output Y2, buffer 1 (3-state) |
| Pino 18 | 1Y1 — Output Y1, buffer 1 (3-state) |
| Pino 19 | OE2 — Output enable 2 (active low) |
| Pino 20 | VCC — Supply voltage |
Aplicações típicas
SN74HCS541QPWRQ1 é adequado para 6 aplicaçãos: Automotive Body Electronics, MCU Control Bus Buffering, Industrial PLC I/O, Switch and Sensor Interface, LED Display and Driver Enable, Test and Measurement Fixtures.
Automotive Body Electronics
In body control modules, door modules, and lighting controllers, the SN74HCS541QPWRQ1 buffers MCU GPIO to lamp drivers, relays, and switch matrices. Its AEC-Q100 qualification and -40C to +125C rating meet automotive Grade 1 requirements, while Schmitt-trigger inputs reject noise coupled from injectors, motors, and switched loads on harness lines. Placed between the MCU port and fan-out loads, it provides strong CMOS drive and 3-state bus isolation for diagnostics, with the flow-through pinout simplifying routing between the connector side and MCU side of the PCB.
Recomendado
MCU Control Bus Buffering
For address, control, and chip-select lines from MCUs such as the TMS320F2800xx series, the SN74HCS541QPWRQ1 fans out drive capability to multiple peripheral ICs without loading the MCU pins. The 3-state outputs let a boot-time supervisor or FPGA share the bus, with OE1/OE2 enabling sequenced bus handoff. The non-inverting buffers preserve logic polarity, and the HCS Schmitt inputs tolerate the slow RC-filtered reset and enable lines commonly found on control boards, reducing false clocking from ground-bounce during switching events.
Recomendado
Industrial PLC I/O
In PLC digital input cards, field signals arrive through optocouplers and RC filters that produce slow, noisy edges. The SN74HCS541QPWRQ1 Schmitt-trigger inputs convert these edges into clean logic transitions, while the octal 3-state outputs feed an MCU or backplane bus that multiple cards share. Its -40C to +125C temperature range and tape-and-reel supply support high-volume industrial manufacturing. The flow-through pinout aligns naturally with terminal-block-to-processor signal routing on standard PLC card layouts.
Recomendado
Switch and Sensor Interface
Mechanical switches,Hall latches, and analog-comparator outputs frequently generate slow or bouncy edges. The SN74HCS541QPWRQ1 hysteresis specification prevents multiple transitions on such signals, making it suitable as a Schmitt buffer stage before MCU timers or counters. Two active-low enables allow firmware to gate sensor data onto a shared bus only during sampling windows, reducing bus contention. Its AEC-Q100 rating extends this interface architecture from consumer appliances into automotive switch clusters and steering-column modules.
Recomendado
LED Display and Driver Enable
In automotive and industrial LED matrices and instrument clusters, the SN74HCS541QPWRQ1 buffers row/column enable and blanking lines from the controller to LED driver ICs. The 3-state outputs allow other controllers to take over display control during diagnostic modes, and the fast CMOS outputs keep enable skew low across eight parallel channels. Its 20-TSSOP footprint fits dense cluster PCBs, and the automotive qualification covers the elevated cabin temperatures near displays and lighting electronics.
Recomendado
Test and Measurement Fixtures
Automated test equipment and bench fixtures use the SN74HCS541QPWRQ1 to route control signals to device-under-test sockets without loading the host controller. The 3-state outputs permit safe sharing of test-bus lines between multiple fixture cards, and Schmitt inputs clean up long-cable signals from the test host. Operation to +125C supports burn-in racks, and the widely available 20-TSSOP package simplifies socketed adapter-board designs and quick BOM replenishment across test stations.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para SN74HCS541QPWRQ1 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | SN74HCS541PWR | SN74LVC244QAPWRQ1 | MC74HC541AFL2 |
|---|---|---|---|---|
| Package | 20-TSSOP (PW) | 20-TSSOP (PW) - same | 20-TSSOP (PW) - same | 20-TSSOP - same footprint, verify datasheet |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
| Automotive AEC-Q100 | Yes (Q1) | No | Yes (Q1) | No |
| Schmitt-Trigger Inputs | Yes | Yes | No | No |
| Channels | 8 (non-inverting) | 8 (non-inverting) | 8 (non-inverting) | 8 (non-inverting) |
| Output Type | 3-State | 3-State | 3-State | 3-State |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +85C |
| Output Enable Pins | 2 (active-low) | 2 (active-low) | 2 (active-low) | 2 (active-low) |
Principais diferenciais
- Schmitt-trigger inputs for noisy/slow edges (vs SN74LVC244QAPWRQ1)
- Automotive qualification at HC price point (vs SN74HCS541PWR)
- Wider VCC range than LVC family (vs SN74LVC244QAPWRQ1)
Notas de projeto
Place a 100 nF ceramic decoupling capacitor within 3 mm of the VCC (pin 20) and GND (pin 10) pins, with an additional 1 uF bulk capacitor nearby. The flow-through pinout lets you keep input traces on one board side and output traces on the other, minimizing crosstalk between buffered groups. Avoid routing high-dv/dt automotive load lines parallel to the Schmitt inputs.
Both OE1 (pin 1) and OE2 (pin 19) must be low for outputs to drive; leaving either floating causes indeterminate states. Always use pull-up resistors (10k to VCC) on OE lines so outputs default to high-impedance during MCU reset - critical in shared-bus systems to prevent contention during power-up sequencing.
The Schmitt-trigger inputs tolerate slow RC-filtered edges, but hysteresis does not protect against supply-dip-induced misreads. Keep series resistance on input filters modest (1k-10k) so leakage currents do not shift the switching thresholds. Unused inputs should be tied to VCC or GND, never left floating on CMOS logic.
Informações de conformidade
AEC-Q100 automotive qualified per TI product page. RoHS/lead-free per standard TI Q1 flow; other values not stated in provided data.
