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Texas Instruments SN74AC8541QPWRQ1
- Part No.:
- SN74AC8541QPWRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AC8541QPWRQ1.pdf
- Description:
- AUTOMOTIVE EIGHT-CHANNEL 1.5V-TO
- Quantity:
- Payment:
- Shipping:
Inventory:2,800
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Product details
Overview
SN74AC8541QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive octal buffer with Schmitt-trigger inputs and dual active-low 3-state output enables (OE1, OE2). It operates from 1.5V to 6V, delivers ≤6ns propagation delay at 5V/50pF, supports ±24mA continuous output drive, and drives 50Ω transmission lines - used for signal conditioning and bus isolation in engine control units and ADAS sensor interfaces.
For engineers reviewing the SN74AC8541QPWRQ1 datasheet, SN74AC8541QPWRQ1 pinout, SN74AC8541QPWRQ1 application, or SN74AC8541QPWRQ1 equivalent, key selection criteria include its dual OE-controlled 3-state operation, Schmitt-trigger noise immunity, wettable-flank VQFN package compatibility with AOI, and automotive-grade thermal performance across –40°C to +125°C.
Technical Context
This device implements eight independent CMOS buffers with hysteresis-enabled Schmitt-trigger inputs (ΔVT ≥ 0.22V at 1.5V), enabling robust rejection of slow-rising or noisy signals without external filtering. Each channel features balanced push-pull outputs capable of sourcing/sinking symmetric current.
Output state is controlled jointly by OE1 and OE2: both must be low for active drive; either high forces all eight outputs into high-impedance. The architecture supports simultaneous enable/disable of all channels while maintaining signal integrity on long traces or unterminated lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 6V - supports single-supply operation across 1.8V, 2.5V, 3.3V, and 5V logic domains |
| Propagation Delay (tpd) | ≤6ns at VCC = 5V, CL = 50pF - ensures timing-critical signal routing in high-speed automotive buses |
| Output Drive (Continuous) | ±24mA at 5V - sufficient to drive multiple CMOS loads or terminate 50Ω lines without external buffers |
| Input Hysteresis (ΔVT) | Min 0.22V at 1.5V, up to 1.6V at 5.5V - rejects >200mVpp noise on slow-switching sensors or mechanical switches |
| Operating Temperature | –40°C to +125°C (Grade 1) - qualified for under-hood ECU, transmission control, and radar module environments |
| ESD Rating (HBM) | ±2000V - meets AEC-Q100-002 Level 2 for assembly-line handling and in-system robustness |
| Input Voltage Tolerance | Accepts up to 6V regardless of VCC - allows interfacing with higher-voltage legacy subsystems without level shifters |
Pinout & Package
RKS (VQFN, 20-pin) package with wettable flanks, 4.5mm × 2.5mm body size, exposed thermal pad (connectable to GND or left floating).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE1, OE2 | Active-low 3-state enable inputs | Both must be low to activate outputs; provides fail-safe disable if either control line floats high |
| A1–A8 | Independent Schmitt-trigger inputs | Each accepts slow/noisy signals; hysteresis prevents chatter during switch bounce or EMI transients |
| Y1–Y8 | CMOS 3-state buffered outputs | Simultaneously driven or tri-stated; capable of driving 50Ω transmission lines directly |
| VCC | Positive supply | Supplies all eight buffers; decoupling capacitor required adjacent to pin for stable switching |
| GND | Ground reference | Return path for all output sink current and supply leakage; must be low-impedance for noise immunity |
| Thermal Pad | Exposed die attach pad | Improves thermal dissipation; recommended connection to GND plane for enhanced reliability in automotive thermal cycles |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent OE pins | Enables redundant or split-control architectures - e.g., OE1 from microcontroller, OE2 from safety monitor |
| Schmitt-trigger inputs | Eliminates need for external RC filters on debounced switch inputs or analog sensor outputs |
| Wettable flank QFN | Enables automated optical inspection (AOI) of solder joints - critical for zero-defect automotive manufacturing |
| Wide 1.5V–6V supply range | Reduces BOM count by supporting mixed-voltage systems (e.g., 3.3V MCU + 5V sensor interface) |
| ±75mA short-burst drive | Handles transient peak loads (e.g., charging line capacitance) without latch-up or voltage droop |
Applications
| Engine Control Unit Signal Conditioning | ADAS Camera Interface Buffering |
|---|---|
Use Scenario: Isolating and cleaning crankshaft position sensor signals before feeding to MCU timer capture inputs. IC Role / Device Role / Timing Role: Octal buffer with Schmitt-trigger inputs conditions slow-rising inductive sensor edges and suppresses EMI-induced glitches. Use Value: Eliminates false edge detection in real-time ignition timing, improving combustion efficiency and emissions compliance. |
Use Scenario: Driving serialized pixel data from image sensor to serializer IC over 15cm PCB trace in surround-view camera module. IC Role / Device Role / Timing Role: 3-state buffer drives 50Ω transmission line with <6ns tpd, preserving eye diagram integrity at 25MHz pixel clock. Use Value: Prevents signal reflection and jitter accumulation, ensuring error-free LVDS or sub-LVDS video transmission. |
| Transmission Control Module Debounce | Automotive Infotainment I/O Expansion |
Use Scenario: Debouncing mechanical gear selector switch inputs exposed to vibration and contact bounce in automatic transmission housing. IC Role / Device Role / Timing Role: Schmitt-trigger input thresholds reject <200mVpp noise; 3-state outputs isolate switch network during MCU reset. Use Value: Guarantees deterministic gear position reporting during cold start and thermal cycling, avoiding unsafe shift commands. |
Use Scenario: Expanding GPIO count for touch panel, button matrix, and LED status indicators in head unit design. IC Role / Device Role / Timing Role: Eight independent buffers interface 3.3V MCU GPIOs to mixed-voltage peripherals (5V LEDs, 1.8V touch controller). Use Value: Enables voltage-level translation and fan-out without discrete resistors or additional level shifters, reducing board area and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer with 3-state and Schmitt-trigger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC8T245RHLR | Translating octal bus transceiver (A/B direction control); no Schmitt inputs; 1.65V–5.5V range | Requires external pull-ups for switch debouncing; unsuitable for slow/noisy sensor inputs | Choose only when bidirectional level translation between 1.8V/3.3V domains is required |
| MC74VHC125DTG | Quad non-inverting buffer; single OE per pair; no Schmitt inputs; –40°C to +105°C only | Lacks automotive temperature grade and dual-OE fail-safe control; limited channel count | Select only for non-automotive industrial use where AEC-Q100 qualification is not mandated |
Compared with SN74AC8541QPWRQ1, SN74LVC8T245RHLR adds voltage translation but removes noise immunity and automotive qualification, while MC74VHC125DTG reduces channel density and thermal margin - making SN74AC8541QPWRQ1 uniquely suited for safety-critical, noise-prone, multi-channel automotive signal conditioning.
Availability
SN74AC8541QPWRQ1 is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, and transmission control systems requiring stable component supply with full AEC-Q100 compliance and long-term automotive lifecycle support.
Supply support for SN74AC8541QPWRQ1 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 delivering analog, embedded processing, and connectivity solutions for automotive, industrial, and personal electronics markets.
The SN74AC8541QPWRQ1 belongs to TI's automotive-qualified logic portfolio, designed specifically for robust signal buffering, noise suppression, and bus isolation in harsh-temperature vehicle subsystems.
FAQ
What is the maximum continuous output current rating for SN74AC8541QPWRQ1 at 5V?
The SN74AC8541QPWRQ1 supports ±24mA continuous output current per channel at VCC = 5V, as specified in Section 5.3 Recommended Operating Conditions. This rating ensures reliable drive capability into standard CMOS loads and 50Ω transmission lines without thermal derating within the –40°C to +125°C operating range. Short-burst peaks up to ±75mA are permitted per Section 1 Features.
Does SN74AC8541QPWRQ1 require external pull-up or pull-down resistors on unused inputs?
Yes - all unused inputs of SN74AC8541QPWRQ1 must be held at VCC or GND to prevent floating states that increase power consumption and risk metastability. Section 5.3 explicitly mandates this; a 10kΩ resistor is commonly used due to leakage current limits (±1µA) and transition rate requirements. Schmitt-trigger inputs tolerate slow edges but still require DC termination.
How does the dual OE architecture (OE1 and OE2) function in SN74AC8541QPWRQ1?
In SN74AC8541QPWRQ1, both OE1 and OE2 must be logic low to enable outputs; if either is high, all eight Y1–Y8 outputs enter high-impedance state. This AND-gated enable logic provides hardware-level fault containment - for example, allowing a safety monitor to force bus isolation independently of the main controller's OE1 signal.
Is SN74AC8541QPWRQ1 compatible with 1.8V logic systems?
Yes - SN74AC8541QPWRQ1 operates down to 1.5V and is fully specified at 1.8V, with tpd ≤10.1ns (typ), VOH ≥1.7V, and VOL ≤0.36V under 1mA load. Its wide supply range enables direct interfacing with 1.8V microcontrollers and FPGAs without level-shifting circuitry, while maintaining AEC-Q100 Grade 1 qualification.
What package variants are available for SN74AC8541QPWRQ1, and which one includes wettable flanks?
SN74AC8541QPWRQ1 is offered in DGS (VSSOP-20), PW (TSSOP-20), and RKS (VQFN-20) packages. Only the RKS package features wettable flanks, as confirmed in Section 1 Features and Figure 7-2. This design enables reliable side-fillet formation and automated optical inspection (AOI) - a requirement for zero-defect automotive PCB assembly.
SN74AC8541QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- 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:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.5V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74AC8541QPWRQ1 FAQ
1.How can I place an order for SN74AC8541QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AC8541QPWRQ1 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 SN74AC8541QPWRQ1 reliable?
The price and inventory of SN74AC8541QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AC8541QPWRQ1 is usually 5 days.
3.What payment methods are accepted for SN74AC8541QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AC8541QPWRQ1 transactions.
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4.How is shipping managed for SN74AC8541QPWRQ1?
SN74AC8541QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AC8541QPWRQ1 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 SN74AC8541QPWRQ1?
For technical support, including SN74AC8541QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AC8541QPWRQ1 requirements.
6.How does Aetrix verify that SN74AC8541QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74AC8541QPWRQ1 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 SN74AC8541QPWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74AC8541QPWRQ1?
All SN74AC8541QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AC8541QPWRQ1, 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 SN74AC8541QPWRQ1 part is unused and in its original packaging.
Return procedure for SN74AC8541QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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