SN74AHCT7541-Q1 - Automotive Octal Buffer, Open-Drain | TI
MPN: SN74AHCT7541-Q1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.85 | $0.85 |
| 10 | $0.76 | $7.60 |
| 100 | $0.68 | $68.00 |
| 500 | $0.61 | $305.00 |
| 1,000 | $0.55 | $550.00 |
Drop-in alternatives for SN74AHCT7541-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:
SN74AHC7541-Q1
β Drop-Inπ Reference alternative (not in catalog)
SN74AHC9541-Q1
β Drop-Inβ In Stock
$0.43 / Unit
View Datasheet βSN74LVC244APWR
β Drop-Inβ In Stock
$0.18 / Unit
View Datasheet β74AHC7541
β Drop-Inπ Reference alternative (not in catalog)
74AHCT7541
β Drop-Inπ Reference alternative (not in catalog)
SN74AHCT7541-Q1 Maximum Ratings & Electrical Characteristics
| Supply Voltage Range | 4.5 V to 5.5 V |
| Number of Channels | 8 |
| Output Type | Open Drain |
| Input Type | Schmitt Trigger |
| Logic Family | AHCT |
| Output Current (Sink) | 50 mA (per datasheet) |
| Maximum Capacitive Load | 50 pF (recommended) |
| Operating Temperature Range | -40Β°C to +125Β°C |
| Package | 20-TSSOP (PW) |
| Mounting Type | Surface Mount |
| Enable Pins | 2 (active low, OE1 and OE2) |
| AEC-Q100 Qualified | Yes |
| ESD Rating (HBM) | [DATA_NEEDED: HBM ESD rating value] |
| RoHS Status | Compliant (per TI) |
| Propagation Delay | [DATA_NEEDED: propagation delay value] |
SN74AHCT7541-Q1 Pin Configuration
| Pin 1 | 1A β Input for channel 1 |
| Pin 2 | 1Y β Output for channel 1 (open-drain) |
| Pin 3 | 2A β Input for channel 2 |
| Pin 4 | 2Y β Output for channel 2 (open-drain) |
| Pin 5 | 3A β Input for channel 3 |
| Pin 6 | 3Y β Output for channel 3 (open-drain) |
| Pin 7 | 4A β Input for channel 4 |
| Pin 8 | 4Y β Output for channel 4 (open-drain) |
| Pin 9 | GND β Ground |
| Pin 10 | 5Y β Output for channel 5 (open-drain) |
| Pin 11 | 5A β Input for channel 5 |
| Pin 12 | 6Y β Output for channel 6 (open-drain) |
| Pin 13 | 6A β Input for channel 6 |
| Pin 14 | 7Y β Output for channel 7 (open-drain) |
| Pin 15 | 7A β Input for channel 7 |
| Pin 16 | 8Y β Output for channel 8 (open-drain) |
| Pin 17 | 8A β Input for channel 8 |
| Pin 18 | OE1 β Output enable 1 (active low) |
| Pin 19 | OE2 β Output enable 2 (active low) |
| Pin 20 | VCC β Power supply (4.5V to 5.5V) |
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
SN74AHCT7541-Q1 is suitable for 6 applications: Automotive LED Indicator Driving, Level Shifting, Wired-OR Logic, Industrial Control Systems, Automotive Body Electronics, Test and Measurement Equipment.
Automotive LED Indicator Driving
The SN74AHCT7541-Q1 is ideal for driving indicator LEDs in automotive dashboards and control panels. Its open-drain outputs can sink up to 50mA per channel, sufficient for most LEDs. The AEC-Q100 qualification ensures reliable operation in harsh automotive environments, and the Schmitt-trigger inputs provide noise immunity against electrical transients. By connecting LEDs between the output and VCC with a current-limiting resistor, the device can directly drive multiple indicators, simplifying the design and reducing component count.
Recommended
Level Shifting
The open-drain outputs of the SN74AHCT7541-Q1 make it excellent for level shifting between different voltage domains. By connecting pull-up resistors to a higher voltage rail, the device can shift signals from a 3.3V microcontroller to a 5V peripheral, or vice versa. The wide supply voltage range of 4.5V to 5.5V allows operation in 5V systems, while the Schmitt-trigger inputs ensure clean transitions even with slow or noisy signals. This application is common in automotive and industrial systems where multiple voltage domains coexist.
Recommended
Wired-OR Logic
The SN74AHCT7541-Q1 can implement wired-OR logic, where multiple open-drain outputs are connected to a common bus with a pull-up resistor. This is useful for interrupt lines or shared data buses in automotive and industrial systems. The active-low enable pins allow individual channels to be disabled, providing flexible control. The device's high sink current capability ensures fast discharge of the bus capacitance, maintaining signal integrity. The AEC-Q100 qualification makes it suitable for safety-critical applications.
Recommended
Industrial Control Systems
In industrial control systems, the SN74AHCT7541-Q1 provides robust buffering for control signals, driving relays, or interfacing with sensors. The Schmitt-trigger inputs reject noise from long cable runs, and the open-drain outputs can drive loads such as LEDs or optocouplers. The wide operating temperature range of -40Β°C to +125Β°C ensures reliable operation in factory environments. The device's automotive-grade reliability also makes it suitable for industrial applications where downtime is costly.
Recommended
Automotive Body Electronics
The SN74AHCT7541-Q1 is designed for automotive body electronics, such as controlling interior lighting, switch inputs, and indicator LEDs. Its AEC-Q100 qualification ensures it meets the stringent reliability requirements of the automotive industry. The open-drain outputs are ideal for driving LEDs, and the Schmitt-trigger inputs provide immunity to electrical noise from the vehicle's electrical system. The device's small TSSOP package saves board space in space-constrained modules.
Recommended
Test and Measurement Equipment
In test and measurement equipment, the SN74AHCT7541-Q1 can be used to buffer signals, drive indicator LEDs, or implement logic interfaces. The open-drain outputs allow for easy interfacing with different logic levels, and the Schmitt-trigger inputs ensure accurate signal capture even with noisy inputs. The device's wide operating temperature range and high reliability make it suitable for benchtop and portable instruments. The automotive-grade qualification provides additional confidence in long-term performance.
Recommended
Recommended Products Summary
Engineering reference data for SN74AHCT7541-Q1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74AHC7541-Q1 | SN74AHC9541-Q1 | SN74LVC244A | 74AHC7541 |
|---|---|---|---|---|---|
| Package | 20-TSSOP (PW) | 20-TSSOP (PW) | 20-TSSOP (PW) | 20-TSSOP (PW) | 20-TSSOP (PW) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | NXP Semiconductors |
| Output Type | Open Drain | Open Drain | 3-State | 3-State | Open Drain |
| Supply Voltage Range | 4.5V to 5.5V | 2V to 5.5V | 2V to 5.5V | 1.65V to 3.6V | 2V to 5.5V |
| Automotive Grade | Yes (AEC-Q100) | Yes (AEC-Q100) | Yes (AEC-Q100) | No | No |
| Input Type | Schmitt Trigger | Schmitt Trigger | Schmitt Trigger | Standard | Schmitt Trigger |
| Output Current (Sink) | 50mA | 50mA | 50mA | 24mA | 50mA |
| Operating Temperature Range | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +85Β°C | -40Β°C to +125Β°C |
Key Differentiators
- Automotive AEC-Q100 qualification (vs SN74AHC7541-Q1)
- Open-drain outputs for LED driving (vs SN74AHC9541-Q1)
- Schmitt-trigger inputs for noise immunity (vs SN74LVC244A)
Design Notes
Place a 0.1uF decoupling capacitor close to the VCC pin (pin 20) and a 10uF bulk capacitor nearby to filter power supply noise. Ensure the ground pin (pin 9) has a low-impedance connection to the ground plane. For open-drain outputs, connect pull-up resistors (typically 1k to 10k ohms) from each output to the desired high-level voltage rail. The pull-up value should be chosen based on the required rise time and sink current.
The SN74AHCT7541-Q1 in a TSSOP package has a thermal resistance of approximately 100Β°C/W (theta_JA). At 5V supply and 50mA sink current per output, the power dissipation can be significant if all eight outputs are active simultaneously. For example, with 0.5V output low voltage, each output dissipates 25mW, totaling 200mW. This would cause a temperature rise of 20Β°C above ambient. Ensure adequate airflow or copper area for heat dissipation in high-temperature automotive environments.
Do not exceed the maximum output sink current of 50mA per channel, as this can damage the device. Ensure that both OE1 and OE2 are low for outputs to be active; if either is high, all outputs are disabled. When using open-drain outputs, always include pull-up resistors; otherwise, the output will float when not actively sinking. Also, avoid exceeding the recommended capacitive load of 50pF to maintain signal integrity.
Compliance Information
AEC-Q100 qualified per TI product page. RoHS compliant per TI.
