My Inquiry
My Account
Texas Instruments SN74ACT8541QPWRQ1
- Part No.:
- SN74ACT8541QPWRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ACT8541QPWRQ1.pdf
- Description:
- AUTOMOTIVE EIGHT-CHANNEL 4.5V-TO
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ACT8541QPWRQ1 from Texas Instruments is an automotive-grade octal buffer IC with 3-state outputs and Schmitt-trigger inputs, operating from 4.5V to 5.5V, delivering ±24mA continuous output drive at 5V, supporting 50Ω transmission lines, and qualified per AEC-Q100 Grade 1 (−40°C to +125°C) for engine control, body electronics, and ADAS signal conditioning.
For engineers reviewing the SN74ACT8541QPWRQ1 datasheet, SN74ACT8541QPWRQ1 pinout, SN74ACT8541QPWRQ1 application, or SN74ACT8541QPWRQ1 equivalent, key selection criteria include TTL-compatible Schmitt-trigger input hysteresis (ΔVT = 0.4–1.5V), 9.6ns max propagation delay (VCC = 5V, CL = 50pF), dual active-low output enables (OE1/OE2), wettable-flank VQFN package compatibility, and ±75mA short-burst output capability.
Technical Context
This device implements eight independent CMOS buffers with positive-logic Schmitt-trigger inputs-each providing input hysteresis (VT+ = 1.2–2.1V, VT− = 0.5–1.4V) to reject slow or noisy signals-and balanced 3-state push-pull outputs controlled jointly by OE1 and OE2. Both enables must be low for output activation, enabling synchronized channel gating in bus isolation or multiplexed driver applications.
The logic supports rail-to-rail operation across its 4.5V–5.5V supply range, with input transition rate tolerance up to 20 ns/V and output drive optimized for 50Ω line termination. Thermal design leverages RKS (VQFN) package's low RθJA of 67.7°C/W and integrated thermal pad for automotive under-hood reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V to 5.5V - ensures compatibility with standard 5V automotive power rails and robustness against battery transients |
| Propagation Delay | 9.6ns max (VCC = 5V, CL = 50pF) - enables high-speed signal buffering in timing-critical CAN/LIN interface paths |
| Output Drive | ±24mA continuous - sustains stable logic levels driving multiple CMOS loads or LED indicators without external buffering |
| Hysteresis (ΔVT) | 0.4V to 1.5V - rejects noise on long harness runs or switch debouncing circuits without external RC filtering |
| Operating Temp | −40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood and powertrain ECUs |
| ESD Rating | HBM ±2000V, CDM ±1000V - provides built-in protection against assembly and field handling ESD events |
| Input Thresholds | VT+ = 1.2–2.1V, VT− = 0.5–1.4V - ensures reliable TTL-level interfacing across voltage and temperature extremes |
Pinout & Package
SN74ACT8541QPWRQ1 is packaged in a 20-pin wettable-flank VQFN (RKS), measuring 4.5mm × 2.5mm with exposed thermal pad (connectable to GND). The package supports automated optical inspection (AOI) and enhances thermal dissipation in compact automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE1, OE2 | Active-low 3-state enable inputs | Both must be low to activate all eight outputs; enables synchronous bus isolation or shared-load control |
| A1–A8 | Buffer input terminals | Individual Schmitt-trigger inputs accepting slow/noisy signals; each requires termination to VCC or GND when unused |
| Y1–Y8 | Buffer output terminals | CMOS push-pull outputs with ±24mA drive; support 50Ω line driving and parallel connection for higher current |
| VCC | Positive supply | 4.5V–5.5V input powering all logic and output stages; requires local 0.1µF bypass capacitor |
| GND | Ground reference | Return path for all I/O and supply currents; connects to thermal pad in RKS package for improved heat transfer |
| Thermal Pad | Exposed copper pad | Enhances thermal performance; may be connected to GND plane for mechanical stability and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation with HBM/CDM ESD ratings - eliminates need for external qualification testing in automotive Tier 1 designs |
| TTL-compatible Schmitt-trigger inputs | Input hysteresis (0.4–1.5V) rejects noise on long cables or mechanical switch inputs - removes requirement for external RC filters or debounce firmware |
| Wettable-flank VQFN (RKS) | Side-solder fillets enable AOI verification of solder joint integrity - improves manufacturing yield and field-reliability assurance in safety-critical modules |
| Dual active-low output enables | OE1 and OE2 must both be asserted low for output activation - prevents accidental bus contention during power-up or reset sequencing |
| 50Ω transmission line drive | Optimized output impedance and edge rate support clean signal integrity over PCB traces >12 cm - reduces need for external series termination resistors |
Applications
| Engine Control Unit Signal Conditioning | Body Control Module I/O Expansion |
|---|---|
Use Scenario: Buffering crankshaft position sensor signals before ADC sampling in ECU mainboard. IC Role / Device Role / Timing Role: Signal conditioner isolating noisy analog sensor outputs while preserving edge timing for precise ignition timing calculation. Use Value: Schmitt-trigger hysteresis rejects EMI from ignition coils; 9.6ns delay ensures sub-microsecond timing alignment with microcontroller clock domain. | Use Scenario: Driving multiple door lock actuators and interior lighting LEDs from a single MCU GPIO bank. IC Role / Device Role / Timing Role: Level-shifting and current-boosting interface between low-drive MCU pins and 12V-compatible loads. Use Value: ±24mA continuous drive directly powers LEDs or relays; 3-state outputs allow dynamic bus sharing among multiple subsystems. |
| ADAS Camera Interface Isolation | Automotive LIN Bus Transceiver Support |
Use Scenario: Isolating MIPI CSI-2 clock or sync signals between camera module and SoC in rear-view systems. IC Role / Device Role / Timing Role: High-speed buffer preventing ground loop coupling and maintaining signal integrity across board-to-board connectors. Use Value: 50Ω line drive capability minimizes reflections on flex-cable interconnects; low propagation skew preserves timing margins. | Use Scenario: Level translation and noise filtering for LIN master node TX/RX lines in gateway modules. IC Role / Device Role / Timing Role: Robust digital interface conditioner converting MCU logic levels to LIN-compliant voltage thresholds. Use Value: TTL-compatible inputs tolerate LIN bus voltage fluctuations; 3-state outputs enable bidirectional half-duplex line control without external switches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer with 3-state and Schmitt-trigger input applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LV8T245PWRE4 | Lower voltage range (1.65V–5.5V), no Schmitt inputs, dual-supply level shift capability | Suitable for mixed-voltage system interfacing but lacks noise immunity for direct sensor buffering | Select when level shifting between 3.3V MCU and 5V peripherals is required; not recommended for noisy automotive sensor inputs |
| MC74VHC125DTG | Non-automotive grade, wider hysteresis (0.9V typ), no AEC-Q100 qualification, TSSOP-14 package | Limited to industrial or infotainment applications where extended temperature and ESD robustness are not mandated | Use only in non-safety-critical cabin modules; requires additional ESD protection and thermal derating outside −40°C to +105°C |
Compared with SN74ACT8541QPWRQ1, SN74LV8T245PWRE4 offers flexible voltage translation but sacrifices noise immunity, while MC74VHC125DTG provides higher hysteresis at lower cost but lacks automotive qualification and thermal margin - making SN74ACT8541QPWRQ1 the sole choice for AEC-Q100-compliant signal conditioning in powertrain and chassis domains.
Availability
SN74ACT8541QPWRQ1 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera interfaces, and LIN bus support requiring stable component supply across automotive production lifecycles.
Supply support for SN74ACT8541QPWRQ1 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 automotive electronics, with decades of experience in high-reliability automotive IC design and manufacturing.
The SN74ACT8541QPWRQ1 belongs to TI's automotive logic portfolio, engineered specifically for noise-immune signal conditioning and bus isolation in harsh-temperature vehicle environments - targeting ECU, gateway, and ADAS subsystems demanding AEC-Q100 compliance and long-term supply stability.
FAQ
What is the maximum continuous output current specification for SN74ACT8541QPWRQ1?
The SN74ACT8541QPWRQ1 supports ±24mA continuous output current per channel at 5V supply, as specified in the Recommended Operating Conditions table. This rating applies across the full −40°C to +125°C temperature range and ensures stable logic-level drive into typical CMOS or LED loads without thermal throttling or parametric shift. Short-burst capability extends to ±75mA, but sustained operation above ±24mA requires careful thermal analysis using the RθJA value of 67.7°C/W for the RKS package.
Does SN74ACT8541QPWRQ1 require external pull-up or pull-down resistors on unused inputs?
Yes, SN74ACT8541QPWRQ1 requires all unused inputs to be terminated to either VCC or GND - floating inputs are strictly prohibited due to undefined logic states and increased dynamic current consumption. A 10kΩ resistor is recommended for pull-up or pull-down biasing, balancing leakage current limits (±1µA max), transition speed, and power efficiency. Direct connection to VCC or GND is acceptable if the input remains permanently inactive.
Can SN74ACT8541QPWRQ1 drive 50Ω transmission lines directly without external series termination?
Yes, SN74ACT8541QPWRQ1 is explicitly characterized to drive 50Ω transmission lines directly, as confirmed in the Features and Applications sections. Its output stage is optimized for controlled edge rates and impedance matching, enabling clean signal integrity on traces longer than 12 cm without added series resistors - though layout best practices (short traces, ground flood fill, local decoupling) remain essential to maintain this performance in production PCBs.
What is the function of the thermal pad on the SN74ACT8541QPWRQ1 RKS package?
The thermal pad on the SN74ACT8541QPWRQ1 RKS package serves dual purposes: it enhances thermal dissipation (reducing junction-to-board thermal resistance to 40.4°C/W) and improves mechanical solder joint reliability via wettable flanks for AOI inspection. TI recommends connecting the pad to the PCB's GND plane to provide both thermal and EMI benefits; leaving it floating is permissible but forfeits thermal performance advantages critical in automotive under-hood applications.
How do OE1 and OE2 interact to control output states in SN74ACT8541QPWRQ1?
In SN74ACT8541QPWRQ1, both OE1 and OE2 are active-low enables that operate in AND logic: all eight outputs enter high-impedance state unless *both* OE1 and OE2 are driven low. This dual-enable architecture prevents unintended output activation during power sequencing or fault conditions - for example, if OE1 is held low by system logic while OE2 is controlled by a watchdog timer, the buffers remain disabled until both signals align, improving functional safety in automotive control modules.
SN74ACT8541QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- Schmitt Trigger
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74ACT8541QPWRQ1 FAQ
1.How can I place an order for SN74ACT8541QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ACT8541QPWRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74ACT8541QPWRQ1 reliable?
The price and inventory of SN74ACT8541QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ACT8541QPWRQ1 is usually 5 days.
3.What payment methods are accepted for SN74ACT8541QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ACT8541QPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ACT8541QPWRQ1?
SN74ACT8541QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ACT8541QPWRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74ACT8541QPWRQ1?
For technical support, including SN74ACT8541QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ACT8541QPWRQ1 requirements.
6.How does Aetrix verify that SN74ACT8541QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74ACT8541QPWRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74ACT8541QPWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74ACT8541QPWRQ1?
All SN74ACT8541QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ACT8541QPWRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74ACT8541QPWRQ1 part is unused and in its original packaging.
Return procedure for SN74ACT8541QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ACT8541QPWRQ1 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
