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Texas Instruments SN74HCS541QWRKSRQ1
- Part No.:
- SN74HCS541QWRKSRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
SN74HCS541QWRKSRQ1.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,671
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Product details
Overview
SN74HCS541QWRKSRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive octal buffer/line driver with Schmitt-trigger inputs, 3-state outputs, and flow-through pinout. It operates from 2 V to 6 V, delivers ±7.8 mA output drive at 6 V, features 100 nA typical ICC, and supports –40°C to +125°C ambient operation for engine control and body electronics applications.
For engineers reviewing the SN74HCS541QWRKSRQ1 datasheet, SN74HCS541QWRKSRQ1 pinout, SN74HCS541QWRKSRQ1 application, or SN74HCS541QWRKSRQ1 equivalent, key selection criteria include dual active-low OE control logic, Schmitt-trigger noise immunity (ΔVT ≥ 0.6 V at 6 V), wettable-flank VQFN-20 packaging, and automotive-grade ESD robustness (HBM ±4 kV, CDM ±1 kV).
Technical Context
This device implements eight independent CMOS buffer channels, each with Schmitt-trigger input architecture enabling reliable operation with slow-rising or noisy signals - VT+ = 2.1 V and VT− = 1.2 V (min) at 6 V supply. Hysteresis ΔVT ≥ 0.6 V ensures noise rejection up to ±300 mV peak-to-peak.
Outputs are 3-state with balanced sourcing/sinking capability (±7.8 mA at 6 V) and controlled by two active-low enable pins (OE1, OE2) requiring both low to activate. The flow-through pinout minimizes PCB trace crossovers in high-density automotive layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - supports wide-input automotive battery rails including 3.3 V and 5 V systems |
| Operating Temperature | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and chassis-mounted ECUs |
| Output Drive | ±7.8 mA at 6 V - sufficient to drive 50-pF loads with <16 ns propagation delay (tpd) |
| Supply Current (ICC) | Typical 100 nA - enables ultra-low-power sleep-mode operation in always-on vehicle networks |
| Input Leakage | ±100 nA max at 6 V - ensures stable biasing of Schmitt inputs without external pull resistors |
| Hysteresis (ΔVT) | Min 0.6 V at 6 V - rejects common-mode noise on long harness traces in 12 V vehicle architectures |
| Propagation Delay | 6 ns typ at 6 V - meets timing budgets for CAN FD pre-driver buffering and sensor interface conditioning |
Pinout & Package
VQFN-20 (WRKS) package with 4.50 mm × 2.50 mm body size, wettable flanks for AOI-compatible solder joint inspection, and 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 enable all eight outputs; enables fail-safe bus isolation in controller reset scenarios |
| A1–A8 | Buffer input terminals | Schmitt-triggered inputs tolerate slow edges and EMI; no external debouncing required for switch interfaces |
| Y1–Y8 | 3-state buffered outputs | Drive high/low or enter high-Z state; compatible with shared bus topologies and hot-swap signal routing |
| VCC | Positive supply | Single rail powers all buffers; decoupling with 0.1 µF capacitor required adjacent to pin 20 |
| GND | Ground reference | Pin 10 provides primary return path; thermal pad enhances thermal dissipation in sealed enclosures |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40°C to +125°C ambient, supporting powertrain and ADAS subsystems |
| Wettable-flank QFN (WRKS) | Enables automated optical inspection of side-solder fillets - critical for zero-defect manufacturing in Tier 1 production |
| Dual active-low OE control | Prevents partial output activation; requires coordinated enable signaling for deterministic bus arbitration |
| Schmitt-trigger input hysteresis | ΔVT ≥ 0.6 V at 6 V eliminates false triggering from harness-induced transients in 12 V vehicle systems |
| Ultra-low ICC (100 nA typ) | Reduces quiescent current in always-on domains such as door module wake-up circuits and LIN transceiver interfaces |
Applications
| Engine Control Unit Signal Conditioning | Body Control Module Switch Debouncing |
|---|---|
Use Scenario: Buffering analog sensor signals (e.g., throttle position, coolant temp) before ADC sampling in ECU mainboard. IC Role / Device Role / Timing Role: Octal buffer isolates noisy engine bay wiring from sensitive analog front-end; Schmitt inputs reject ignition noise. Use Value: Eliminates need for external RC filters - reduces BOM count and PCB area while maintaining signal integrity across temperature. | Use Scenario: Debouncing mechanical switches (door lock, window lift) in BCM distributed nodes. IC Role / Device Role / Timing Role: Schmitt-trigger inputs convert slow, bouncing switch transitions into clean digital edges for microcontroller GPIO capture. Use Value: Removes software debounce overhead and timer resource usage - improves real-time response and firmware determinism. |
| Automotive LIN Bus Interface Isolation | ADAS Camera Power Sequencing Control |
Use Scenario: Enabling/disabling LIN transceiver data lines during sleep/wake transitions in gateway modules. IC Role / Device Role / Timing Role: 3-state outputs isolate transceiver from bus during MCU reset; dual OE pins support synchronized enable sequencing. Use Value: Prevents bus contention and spurious frame transmission during power-up - ensures LIN compliance and network stability. | Use Scenario: Controlling power-enable signals to image sensor and ISP in rear-view camera modules. IC Role / Device Role / Timing Role: Buffers MCU GPIOs to drive higher-capacitance enable nets; flow-through pinout simplifies fanout routing. Use Value: Reduces signal skew between multiple power rails - guarantees correct power-up sequence per sensor vendor spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer with Schmitt-trigger input applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCS240QWRKSRQ1 | Inverting octal buffer; identical Schmitt inputs, 3-state, WRKS package, and AEC-Q100 Grade 1 rating | Requires logic inversion in signal path; unsuitable where non-inverting polarity is mandated by protocol | Select when system-level signal inversion is acceptable or required for level-shifting compatibility |
| SN74LVCH16244AQRGYRQ1 | 16-bit non-inverting buffer; LVCMOS I/O, 3-state, but no Schmitt inputs; 56-pin VQFN | Lacks noise immunity for unconditioned switch/sensor inputs; larger footprint and higher ICC (10 µA typ) | Choose only for high-channel-count parallel bus buffering where Schmitt functionality is not needed |
Compared with SN74HCS240QWRKSRQ1 and SN74LVCH16244AQRGYRQ1, the SN74HCS541QWRKSRQ1 uniquely combines non-inverting logic, automotive Schmitt-trigger noise rejection, and compact 20-pin wettable-flank packaging - making it optimal for space-constrained, EMI-prone vehicle interior and powertrain nodes.
Availability
SN74HCS541QWRKSRQ1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS camera power sequencers requiring stable component supply across extended automotive lifecycles.
Supply support for SN74HCS541QWRKSRQ1 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 SN74HCS541QWRKSRQ1 belongs to TI's automotive-qualified HCS logic family, designed specifically for noise-immune signal conditioning and bus interface in harsh-EMI vehicle environments.
FAQ
What is the function of the dual OE pins (OE1 and OE2) on the SN74HCS541QWRKSRQ1?
The SN74HCS541QWRKSRQ1 uses two active-low output enable pins (OE1 and OE2) that must both be driven low to activate all eight buffer outputs. This dual-control architecture prevents accidental output activation during power-up or reset sequences, ensuring deterministic high-impedance behavior until both enables are asserted - a critical safety feature in automotive bus isolation applications.
Does the SN74HCS541QWRKSRQ1 require external pull-up or pull-down resistors on its inputs?
No, the SN74HCS541QWRKSRQ1 does not require external pull-up or pull-down resistors on its Schmitt-trigger inputs due to its low input leakage current (±100 nA max) and built-in hysteresis. Unused inputs should still be tied to VCC or GND to prevent floating states, but no resistor is needed for biasing - simplifying layout and reducing BOM cost in automotive modules.
What is the maximum capacitive load the SN74HCS541QWRKSRQ1 can drive while meeting datasheet timing specs?
The SN74HCS541QWRKSRQ1 is characterized for CL = 50 pF in its switching specifications, including propagation delay (tpd ≤ 16 ns at 6 V) and transition time (tt ≤ 8 ns). Driving loads >50 pF is possible but degrades timing performance and increases dynamic current; for guaranteed spec compliance in automotive designs, keep total output capacitance ≤50 pF using short traces and minimal stubs.
How does the wettable flank feature of the WRKS package benefit automotive manufacturing?
The wettable flank feature on the SN74HCS541QWRKSRQ1's VQFN-20 (WRKS) package enables reliable side-fillet formation during reflow soldering, allowing automated optical inspection (AOI) to verify solder joint quality without X-ray. This is essential for zero-defect requirements in Tier 1 automotive production, improving first-pass yield and reducing field failure risk in safety-critical modules.
Can the SN74HCS541QWRKSRQ1 be used in 12 V automotive battery-supplied systems?
Yes, the SN74HCS541QWRKSRQ1 operates from 2 V to 6 V, so it cannot be directly powered from a 12 V battery rail. It must be used with a local 3.3 V or 5 V LDO or DC/DC converter in 12 V vehicle systems. Its wide voltage range supports direct integration with common domain supplies, and its AEC-Q100 Grade 1 rating ensures reliability across the full automotive temperature range when properly regulated.
SN74HCS541QWRKSRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-VQFN (2.5x4.5)
SN74HCS541QWRKSRQ1 FAQ
1.How can I place an order for SN74HCS541QWRKSRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HCS541QWRKSRQ1 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 SN74HCS541QWRKSRQ1 reliable?
The price and inventory of SN74HCS541QWRKSRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HCS541QWRKSRQ1 is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HCS541QWRKSRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HCS541QWRKSRQ1?
SN74HCS541QWRKSRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HCS541QWRKSRQ1 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 SN74HCS541QWRKSRQ1?
For technical support, including SN74HCS541QWRKSRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HCS541QWRKSRQ1 requirements.
6.How does Aetrix verify that SN74HCS541QWRKSRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74HCS541QWRKSRQ1 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 SN74HCS541QWRKSRQ1 meets industry standards.
7.What is the process for return or replacement of SN74HCS541QWRKSRQ1?
All SN74HCS541QWRKSRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HCS541QWRKSRQ1, 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 SN74HCS541QWRKSRQ1 part is unused and in its original packaging.
Return procedure for SN74HCS541QWRKSRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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