SN74AHC9541-Q1 - Automotive Octal Buffer with Schmitt-Trigger | TI
MPN: SN74AHC9541-Q1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.25 | $1.25 |
| 10 | $1.12 | $11.20 |
| 100 | $0.95 | $95.00 |
| 500 | $0.82 | $410.00 |
| 1,000 | $0.74 | $740.00 |
Drop-in alternatives for SN74AHC9541-Q1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
SN74AHC9541QDGSRQ1
β Drop-Inπ Reference alternative (not in catalog)
SN74AHC9541QPWRQ1
β Drop-Inπ Reference alternative (not in catalog)
SN74AHCT9541QPWRQ1
β Drop-Inπ Reference alternative (not in catalog)
SN74AHCT7541-Q1
β Drop-Inβ In Stock
$0.32 / Unit
View Datasheet βSN74LVC240A
β Drop-Inβ In Stock
$0.19 / Unit
View Datasheet βSN74AHC9541-Q1 Maximum Ratings & Electrical Characteristics
| Number of Channels | 8 |
| Supply Voltage Range | 2 V to 5.5 V |
| Output Type | 3-State |
| Input Type | Schmitt-Trigger |
| Maximum Capacitive Load | 50 pF |
| Operating Temperature Range | -40Β°C to 125Β°C |
| Package Type | Wettable-Flank QFN |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 |
| Output Enable | Active-Low (OE1, OE2) |
| Technology | CMOS |
| Logic Family | AHC |
| RoHS Status | Compliant |
| REACH Status | Compliant |
| Lead-Free | Yes |
SN74AHC9541-Q1 Pin Configuration
| Pin 1 | OE1 β Output enable 1 (active low) |
| Pin 2 | A1 β Input 1 |
| Pin 3 | Y1 β Output 1 |
| Pin 4 | A2 β Input 2 |
| Pin 5 | Y2 β Output 2 |
| Pin 6 | A3 β Input 3 |
| Pin 7 | Y3 β Output 3 |
| Pin 8 | A4 β Input 4 |
| Pin 9 | Y4 β Output 4 |
| Pin 10 | GND β Ground |
| Pin 11 | Y5 β Output 5 |
| Pin 12 | A5 β Input 5 |
| Pin 13 | Y6 β Output 6 |
| Pin 14 | A6 β Input 6 |
| Pin 15 | Y7 β Output 7 |
| Pin 16 | A7 β Input 7 |
| Pin 17 | Y8 β Output 8 |
| Pin 18 | A8 β Input 8 |
| Pin 19 | OE2 β Output enable 2 (active low) |
| Pin 20 | VCC β Power supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
SN74AHC9541-Q1 is suitable for 6 applications: Automotive Body Control Modules, Infotainment Systems, Advanced Driver-Assistance Systems (ADAS), Industrial Automation, Communication Interfaces, Test and Measurement Equipment.
Automotive Body Control Modules
The SN74AHC9541-Q1 is ideal for automotive body control modules (BCMs) due to its AEC-Q100 qualification and wide supply voltage range. It buffers signals from switches, sensors, and other inputs, providing noise immunity through Schmitt-trigger inputs. The 3-state outputs allow bus isolation, and the wettable-flank QFN package ensures reliable solder joints in harsh environments. With a 2V to 5.5V range, it interfaces seamlessly with both 3.3V and 5V microcontrollers, ensuring robust signal integrity in the electrically noisy automotive environment.
Recommended
Infotainment Systems
In infotainment systems, the SN74AHC9541-Q1 buffers digital audio and control signals, ensuring clean transmission between the main processor and peripheral devices. Its Schmitt-trigger inputs reject noise from long PCB traces and connectors, while the 3-state outputs enable bus sharing. The wide supply range supports both 3.3V and 5V logic, simplifying power design. The device's low power consumption and high-speed CMOS technology make it suitable for power-sensitive infotainment applications, and the AEC-Q100 qualification ensures reliability in automotive-grade systems.
Recommended
Advanced Driver-Assistance Systems (ADAS)
The SN74AHC9541-Q1 is used in ADAS to buffer sensor data from cameras, radar, and LiDAR modules. Its Schmitt-trigger inputs provide hysteresis, filtering out noise from high-speed interfaces, while the 3-state outputs allow multiple sensors to share a common bus. The device operates over -40Β°C to 125Β°C, suitable for under-the-hood ADAS applications. The wettable-flank QFN package enables automated optical inspection (AOI), ensuring high manufacturing quality. With a 2V to 5.5V range, it interfaces with various ADAS processors and sensors, maintaining signal integrity in critical safety systems.
Recommended
Industrial Automation
In industrial automation, the SN74AHC9541-Q1 buffers signals from sensors, encoders, and PLCs, providing noise immunity and signal regeneration. Its wide supply range (2V to 5.5V) allows use in both 3.3V and 5V systems, and the Schmitt-trigger inputs reject electrical noise from motors and power lines. The 3-state outputs enable bus isolation for multi-drop configurations. The device's extended temperature range (-40Β°C to 125Β°C) ensures reliable operation in factory environments, and the CMOS technology provides low power consumption for energy-efficient designs.
Recommended
Communication Interfaces
The SN74AHC9541-Q1 is used in communication interfaces to buffer data lines between microcontrollers and communication transceivers. Its Schmitt-trigger inputs clean up noisy signals from long cables, while the 3-state outputs allow multiple devices to share a common bus. The device supports 2V to 5.5V operation, making it compatible with various logic levels. The AEC-Q100 qualification ensures reliability in automotive communication systems, and the wettable-flank QFN package provides robust solder joints for harsh environments. This buffer is essential for maintaining signal integrity in CAN, LIN, and other automotive communication protocols.
Recommended
Test and Measurement Equipment
In test and measurement equipment, the SN74AHC9541-Q1 buffers digital signals from probes and sensors, ensuring accurate signal transmission to the measurement circuitry. Its Schmitt-trigger inputs provide hysteresis, reducing false triggering from noise, and the 3-state outputs allow multiple instruments to share a common bus. The wide supply range (2V to 5.5V) supports various logic levels, and the extended temperature range (-40Β°C to 125Β°C) ensures reliable operation in laboratory and field environments. The device's low power consumption and high-speed CMOS technology make it suitable for portable and benchtop instruments.
Recommended
Recommended Products Summary
Engineering reference data for SN74AHC9541-Q1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74AHC9541QDGSRQ1 | SN74AHC9541QPWRQ1 | SN74AHCT9541QPWRQ1 | SN74AHCT7541-Q1 |
|---|---|---|---|---|---|
| Package | Wettable-Flank QFN | VSSOP-20 | TSSOP-20 | TSSOP-20 | Wettable-Flank QFN |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Voltage Range | 2V to 5.5V | 2V to 5.5V | 2V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V |
| Input Type | Schmitt-Trigger | Schmitt-Trigger | Schmitt-Trigger | Schmitt-Trigger | Schmitt-Trigger |
| Output Type | 3-State | 3-State | 3-State | 3-State | Open-Drain |
| Operating Temperature Range | -40Β°C to 125Β°C | -40Β°C to 125Β°C | -40Β°C to 125Β°C | -40Β°C to 125Β°C | -40Β°C to 125Β°C |
| Automotive Qualification | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
| Maximum Capacitive Load | 50 pF | 50 pF | 50 pF | 50 pF | 50 pF |
Key Differentiators
- Automotive AEC-Q100 qualification (vs SN74LVC240A)
- Schmitt-trigger inputs for noise immunity (vs SN74LVC240A)
- Wettable-flank QFN package for AOI (vs SN74AHC9541QDGSRQ1)
Design Notes
Place decoupling capacitors (0.1uF and 10uF) close to the VCC pin to minimize power supply noise. Ensure the ground pin is connected to a solid ground plane. For the wettable-flank QFN package, follow the recommended PCB layout in the datasheet to ensure proper solder joint formation and enable AOI inspection.
Keep the total capacitive load on each output below 50pF to meet datasheet specifications. If driving longer traces or multiple loads, consider using a buffer with higher drive capability or adding series resistors to dampen reflections. The Schmitt-trigger inputs provide hysteresis, but proper termination is still recommended for high-speed signals.
The SN74AHC9541-Q1 has low power consumption due to CMOS technology, but in high-temperature automotive environments, ensure adequate thermal dissipation. The wettable-flank QFN package has an exposed thermal pad; connect it to a large copper area on the PCB to improve heat transfer. Monitor junction temperature to stay within the -40Β°C to 125Β°C operating range.
Compliance Information
Automotive grade per TI product page. RoHS and REACH compliant per TI datasheet.
