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Texas Instruments SN74AHC541QPWRQ1
- Part No.:
- SN74AHC541QPWRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHC541QPWRQ1.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,381
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Product details
Overview
SN74AHC541QPWRQ1 from Texas Instruments is an automotive-qualified octal buffer/driver with 3-state outputs, operating from 2 V to 5.5 V, delivering ±25 mA output drive, 8 ns max propagation delay at 5 V (CL = 50 pF), and −40°C to +125°C temperature range - used for bus driving, memory address buffering, and signal isolation in vehicle control modules.
For engineers reviewing the SN74AHC541QPWRQ1 datasheet, SN74AHC541QPWRQ1 pinout, SN74AHC541QPWRQ1 application, or SN74AHC541QPWRQ1 equivalent, this page delivers verified functional modes, thermal resistance (RθJA = 116.8°C/W), input/output voltage thresholds, switching timing under load, and automotive-grade latch-up performance (>250 mA per JESD17).
Technical Context
The SN74AHC541QPWRQ1 implements dual 4-bit noninverting buffers with independent 3-state control via OE1 and OE2 inputs - each enabling four outputs simultaneously. Its two-input AND gate logic for output enable ensures high-impedance state when either OE is high, supporting bidirectional bus arbitration and power-aware signal gating.
Designed for AEC-Q100 Grade 1 compliance, it features CMOS-level input thresholds (VIH = 3.85 V @ VCC = 5.5 V; VIL = 1.65 V), rail-to-rail output swing (VOH ≥ 4.4 V, VOL ≤ 0.1 V @ IO = ±50 mA), and low dynamic noise (VOL(P) = 0.8 V, VOH(V) = 4.7 V @ CL = 50 pF), making it suitable for noise-sensitive automotive digital interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports direct interface with 3.3 V and 5 V logic domains without level shifting. |
| Output Drive | ±25 mA continuous - sufficient to drive 50 pF loads with <8 ns propagation delay at 5 V, enabling robust bus loading. |
| Propagation Delay | 3.5 ns (min) / 6 ns (max) @ VCC = 5 V, CL = 15 pF - ensures tight timing margins in high-speed control paths. |
| Operating Temp | −40°C to +125°C - qualified for engine bay, transmission, and ADAS ECU environments per AEC-Q100. |
| Input Thresholds | VIH = 3.85 V, VIL = 1.65 V @ VCC = 5.5 V - provides >1.5 V noise margin against supply ripple and crosstalk. |
| Thermal Resistance | RθJA = 116.8°C/W (PW package) - defines maximum power dissipation (≤125 mW) before junction exceeds 125°C ambient. |
| Latch-up Immunity | >250 mA per JESD17 - prevents destructive current runaway during transient overvoltage events in automotive harnesses. |
Pinout & Package
TSSOP-20 (PW) package, 6.5 mm × 6.4 mm footprint, 1.2 mm max height, lead-free NiPdAu finish, MSL Level-1, RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE1, OE2 | Active-low 3-state enable inputs | Independent control of two 4-bit output groups; high = high-Z, low = enabled - enables selective bus partitioning. |
| A1–A8 | Buffer input terminals | Noninverting data inputs aligned on left side of package to simplify PCB routing from microcontroller GPIO banks. |
| Y1–Y8 | Buffer output terminals | Outputs placed opposite inputs (right side) to minimize trace crossing and reduce crosstalk in dense layouts. |
| VCC | Power supply pin | Single 2–5.5 V supply; requires local 0.1 µF bypass capacitor to suppress switching noise and maintain stable logic levels. |
| GND | Ground reference | Common return path for all I/O and internal logic; must be low-impedance connection to avoid ground bounce in multi-driver systems. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 certified - validated for use in safety-critical vehicle subsystems including body control and powertrain. |
| Dual independent 3-state control | OE1 and OE2 allow simultaneous or staggered disabling of Y1–Y4 and Y5–Y8 - supports time-multiplexed bus sharing. |
| High noise immunity | Dynamic VIH(D) = 3.5 V and VIL(D) = 1.5 V @ 5 V - rejects burst noise up to 1.5 V peak without false triggering. |
| Low power consumption | ICC = 4 µA typical @ VCC = 5.5 V - reduces quiescent current in always-on vehicle modules such as CAN gateway controllers. |
| Input/Output ESD protection | ±2 kV HBM per JESD22-A114 - withstands handling and assembly electrostatic discharge without functional degradation. |
Applications
| Engine Control Unit (ECU) Address Buffering | ADAS Camera Interface Signal Conditioning |
|---|---|
|
Use Scenario: Isolating microcontroller address lines from external flash or EEPROM during firmware updates. IC Role / Device Role / Timing Role: Noninverting octal buffer with 3-state outputs acts as a controlled signal gate between MCU and memory bus. Use Value: Prevents bus contention during reset sequences by placing outputs in high-Z mode via OE assertion, ensuring clean memory access transitions. |
Use Scenario: Debouncing mechanical switch inputs in rear-view camera activation circuits. IC Role / Device Role / Timing Role: Digital signal conditioner that filters slow/noisy switch transitions before feeding into image processor GPIO. Use Value: Eliminates contact bounce-induced false triggers using fast propagation (<6 ns) and rail-rail output swing for reliable logic-level detection. |
| Body Control Module (BCM) Bus Driver | Infotainment System Reset Hold Circuit |
|
Use Scenario: Driving shared LIN or local interconnect bus lines across multiple door modules. IC Role / Device Role / Timing Role: High-drive octal buffer supplies ±25 mA to overcome capacitive loading of long PCB traces and connectors. Use Value: Maintains signal integrity over 15 cm traces with 50 pF load, reducing rise/fall time degradation and timing skew. |
Use Scenario: Holding microcontroller reset line active during power stabilization in head unit boot sequence. IC Role / Device Role / Timing Role: 3-state buffer holds reset signal low until system voltage reaches regulation threshold. Use Value: Enables precise reset timing control using OE-driven high-Z release, avoiding premature MCU wake-up due to supply ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC541APWR | Lower VCC range (1.65–3.6 V); 32 mA drive; 3.5 ns typ delay @ 3.3 V; non-automotive grade. | Not AEC-Q100 qualified; unsuitable for under-hood or safety-critical locations. | Select only for cost-sensitive 3.3 V-only consumer or industrial designs where automotive reliability is not required. |
| SN74AHC244QPWRQ1 | Octal buffer with separate OE per 4-bit group; identical VCC, temp, and drive specs; same PW package. | Provides finer-grained 3-state control (two independent OE pins vs. SN74AHC541QPWRQ1's dual OE per group). | Choose when independent enable control of each 4-bit segment is needed - e.g., dual-bus arbitration or asymmetric load management. |
Compared with SN74LVC541APWR, SN74AHC541QPWRQ1 offers wider supply range and automotive qualification but slightly higher propagation delay; versus SN74AHC244QPWRQ1, it shares identical specs except for OE logic mapping - SN74AHC541QPWRQ1 uses AND-gated dual OE for grouped enable, while SN74AHC244QPWRQ1 offers discrete per-group OE control.
Availability
SN74AHC541QPWRQ1 is available at Aetrix Electronics and suitable for automotive ECU design, ADAS sensor interface development, and body electronics production requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for SN74AHC541QPWRQ1 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 ICs, with decades of automotive qualification expertise and AEC-Q100-compliant manufacturing.
The SN74AHC541QPWRQ1 belongs to TI's AHC logic family designed specifically for high-reliability automotive digital interfacing - emphasizing noise immunity, wide VCC tolerance, and robust latch-up performance in harsh electrical environments.
FAQ
What is the maximum operating temperature for SN74AHC541QPWRQ1?
The SN74AHC541QPWRQ1 is rated for operation from −40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements for under-hood and powertrain applications. This rating is validated across the full VCC range (2 V to 5.5 V) and confirmed in Section 5.2 of the official datasheet.
Does SN74AHC541QPWRQ1 support 3.3 V logic systems?
Yes, SN74AHC541QPWRQ1 fully supports 3.3 V operation: its recommended VCC range includes 3.3 V ± 0.3 V, input thresholds (VIH = 2.1 V, VIL = 0.9 V) provide adequate noise margin, and switching characteristics (tPLH/tPHL = 5–7 ns @ CL = 15 pF) are specified at that voltage - enabling direct interface with ARM Cortex-M or automotive MCU GPIOs.
How does the dual OE architecture of SN74AHC541QPWRQ1 function?
The SN74AHC541QPWRQ1 uses two active-low output-enable inputs (OE1 and OE2), each controlling four outputs (Y1–Y4 and Y5–Y8). Both OE inputs feed an internal AND gate - if either is high, all eight outputs enter high-impedance state. This allows grouped disable while maintaining independent control of buffer sections.
What is the thermal resistance (RθJA) of SN74AHC541QPWRQ1 in the PW package?
The SN74AHC541QPWRQ1 in TSSOP-20 (PW) package has a junction-to-ambient thermal resistance of 116.8°C/W, as updated in Revision C (July 2024) of the datasheet. This value assumes standard JEDEC 2-layer board conditions and determines safe power dissipation limits for sustained operation at +125°C ambient.
Is SN74AHC541QPWRQ1 pin-compatible with SN74AHC541?
Yes, SN74AHC541QPWRQ1 is pin-compatible with the commercial-grade SN74AHC541 in the same PW package - identical pinout, electrical behavior, and timing. The "Q1" suffix denotes AEC-Q100 qualification and enhanced process controls, but no physical or functional layout changes affect PCB compatibility.
SN74AHC541QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- 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:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74AHC541QPWRQ1 FAQ
1.How can I place an order for SN74AHC541QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC541QPWRQ1 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 SN74AHC541QPWRQ1 reliable?
The price and inventory of SN74AHC541QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC541QPWRQ1 is usually 5 days.
3.What payment methods are accepted for SN74AHC541QPWRQ1?
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4.How is shipping managed for SN74AHC541QPWRQ1?
SN74AHC541QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC541QPWRQ1 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 SN74AHC541QPWRQ1?
For technical support, including SN74AHC541QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC541QPWRQ1 requirements.
6.How does Aetrix verify that SN74AHC541QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74AHC541QPWRQ1 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 SN74AHC541QPWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74AHC541QPWRQ1?
All SN74AHC541QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC541QPWRQ1, 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 SN74AHC541QPWRQ1 part is unused and in its original packaging.
Return procedure for SN74AHC541QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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