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Texas Instruments SN74AHCT541PW
- Part No.:
- SN74AHCT541PW
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHCT541PW.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,157
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Product details
Overview
SN74AHCT541PW from Texas Instruments is an octal non-inverting buffer/driver with 3-state outputs in a 20-pin TSSOP package. It operates at 4.5–5.5 V, delivers ±8 mA output drive, supports TTL-compatible inputs, and features dual independent output-enable controls (OE1/OE2) for bus isolation. It is used to drive memory address registers and bidirectional data buses in industrial control and embedded systems.
For engineers reviewing the SN74AHCT541PW datasheet, SN74AHCT541PW pinout, SN74AHCT541PW application, or SN74AHCT541PW equivalent, key selection criteria include its 3-state bus-driving capability, 6.5 ns max propagation delay (CL = 15 pF), 116.8 °C/W junction-to-ambient thermal resistance in TSSOP, and compatibility with 5-V logic systems requiring low-power, high-noise-immunity interface buffering.
Technical Context
The SN74AHCT541PW implements eight independent non-inverting buffer channels, each controlled by one of two active-low 3-state enable inputs (OE1, OE2). Its output stage uses totem-pole CMOS logic with rail-to-rail swing and ±8 mA drive strength under 5 V supply.
Input thresholds are TTL-compatible (VIH = 2 V min, VIL = 0.8 V max), ensuring interoperability with legacy 5-V logic families. The device features latch-up immunity exceeding 250 mA per JESD17 and ESD protection of ±2000 V HBM and ±1000 V CDM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across standard 5-V rail tolerances and brown-out resilience. |
| Output Drive | ±8 mA - Sufficient to drive 50-pF loads with ≤9.5 ns propagation delay, supporting medium-speed bus loading. |
| Propagation Delay | 6.5 ns max (A→Y, CL = 15 pF) - Enables reliable timing in 100+ MHz address/data strobe applications. |
| Input Compatibility | TTL-level (VIH ≥ 2 V, VIL ≤ 0.8 V) - Directly interfaces with legacy 74LS/74F logic without level-shifting. |
| Thermal Resistance | RθJA = 116.8 °C/W (TSSOP) - Requires minimal PCB copper area for thermal management in ambient ≤125°C environments. |
| ESD Rating | ±2000 V HBM - Meets industrial handling requirements without additional input protection circuitry. |
| Operating Temperature | –40°C to +125°C - Qualified for extended-temperature industrial and automotive under-hood applications. |
Pinout & Package
SN74AHCT541PW is housed in a 20-pin Thin Shrink Small Outline Package (TSSOP) measuring 6.50 mm × 6.40 mm (body: 6.50 mm × 4.40 mm), optimized for high-density PCB layouts with exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low 3-state enables - Independently disable Y1–Y4 (OE1) or Y5–Y8 (OE2) for segmented bus control. |
| 2–9 | A1–A8 | Buffer inputs - Accept TTL-compatible signals; must be tied to VCC or GND if unused to prevent floating states. |
| 10 | GND | Ground reference - Shared return path for all logic and output current; requires low-impedance connection to system ground plane. |
| 11–18 | Y1–Y8 | Non-inverting 3-state outputs - Drive external loads only when corresponding OE is low; high-Z state isolates bus segments. |
| 20 | VCC | Power supply - Must be bypassed with 0.1 µF ceramic capacitor placed within 2 mm of the pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3-state enables | OE1 and OE2 independently control two groups of four outputs, enabling flexible bus segmentation and reduced contention risk. |
| TTL-compatible inputs | Accepts 0.8 V / 2.0 V thresholds - Eliminates need for external level shifters when interfacing with legacy 5-V logic families. |
| High noise immunity | Guaranteed 0.4 V noise margin at VCC = 4.5 V - Maintains signal integrity in electrically noisy industrial environments. |
| Low quiescent current | ICC = 4 µA typical at 25°C - Reduces static power consumption in always-on control subsystems. |
| Robust ESD protection | ±2000 V HBM and ±1000 V CDM - Survives standard manufacturing and field handling without external protection diodes. |
Applications
| Memory Address Buffering | Industrial I/O Expansion |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or flash devices on a shared bus. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state outputs isolates address latches during bus arbitration cycles. Use Value: Prevents address line contention during multi-device access; 6.5 ns propagation delay ensures setup/hold timing compliance at 20-MHz bus clocks. |
Use Scenario: Expanding GPIO count of a PLC CPU to control discrete sensors and actuators across multiple I/O modules. IC Role / Device Role / Timing Role: Level-translating driver that conditions TTL-level control signals before routing to optocouplers or relay drivers. Use Value: TTL-compatible inputs accept direct MCU outputs; ±8 mA drive reliably triggers 5-V optoisolators without external transistors. |
| Legacy System Interface | Test Equipment Signal Conditioning |
|
Use Scenario: Interfacing modern FPGA-based controllers with legacy 74LS-based peripheral cards in avionics test benches. IC Role / Device Role / Timing Role: Bidirectional bus buffer that matches voltage thresholds and drive strength of LS-TTL logic. Use Value: Eliminates timing skew and signal degradation caused by impedance mismatch; 125°C rating supports convection-cooled enclosures. |
Use Scenario: Isolating digital stimulus signals from a pattern generator to DUT inputs while preventing back-drive into source instrumentation. IC Role / Device Role / Timing Role: 3-state output driver enabling clean signal injection without affecting generator output impedance. Use Value: Dual OE pins allow synchronized enable/disable of signal groups; high-Z state prevents loading of sensitive instrument outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC541APW | Lower VCC range (1.65–3.6 V); CMOS-input thresholds; 32 mA drive; 3.5 ns typ tPD. | Designed for 3.3-V systems; incompatible with 5-V TTL inputs without level translation. | Select when migrating to low-voltage logic; avoid in mixed 5-V/TTL environments. |
| 74ACT541PW | Same pinout; higher ICC (40 µA max); identical 5-V operation but no MIL-PRF-38535 qualification. | Offers same functional behavior and timing; lacks military-grade testing documentation. | Choose for cost-sensitive commercial designs where full MIL-spec validation is unnecessary. |
Compared with SN74AHCT541PW, SN74LVC541APW enables lower-voltage operation but sacrifices 5-V TTL compatibility, while 74ACT541PW provides identical functionality without military-grade process verification-making SN74AHCT541PW optimal for industrial systems requiring proven robustness at 5 V.
Availability
SN74AHCT541PW is available at Aetrix Electronics and suitable for industrial control systems, legacy equipment upgrades, and embedded test instrumentation requiring stable component supply and long-term manufacturability.
Supply support for SN74AHCT541PW 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 logic solutions with over 50 years of innovation in industrial and automotive electronics.
The SN74AHCT541PW belongs to TI's 74AHCT logic family, designed specifically for robust 5-V bus interfacing in harsh environments where TTL compatibility, ESD resilience, and extended temperature operation are critical.
FAQ
What is the maximum operating temperature for SN74AHCT541PW?
The SN74AHCT541PW is rated for continuous operation from –40°C to +125°C. This extended temperature range is validated per TI's production testing and makes SN74AHCT541PW suitable for industrial motor drives, outdoor automation controllers, and under-hood automotive modules where ambient heat exceeds standard commercial limits.
Does SN74AHCT541PW require external pull-up resistors on OE pins?
Yes - to ensure outputs remain in high-impedance state during power-up or power-down, OE1 and OE2 should each be tied to VCC via a pull-up resistor. TI recommends minimum values based on driver sink capability; a 10-kΩ resistor is commonly used and ensures reliable initialization without excessive current draw in SN74AHCT541PW systems.
Can SN74AHCT541PW drive a 50-pF load within timing specifications?
Yes - SN74AHCT541PW guarantees tPLH/tPHL ≤ 9.5 ns and tPZL/tPZH ≤ 12 ns when driving a 50-pF capacitive load at VCC = 5 V. These values are specified across –40°C to +125°C and ensure deterministic timing in dense PCB layouts with trace capacitance or multiple fan-outs.
Is SN74AHCT541PW RoHS compliant and lead-free?
Yes - SN74AHCT541PW is RoHS compliant with lead finish NIPDAU (nickel/palladium/gold) and MSL Level-1 rating (260°C peak reflow). The device meets JEDEC J-STD-020 moisture sensitivity requirements and supports standard Pb-free reflow profiles without special handling.
How does the dual OE architecture of SN74AHCT541PW improve system design?
The dual OE inputs (OE1 for Y1–Y4, OE2 for Y5–Y8) in SN74AHCT541PW allow independent control of two 4-bit bus segments. This enables selective isolation during partial memory accesses or modular I/O expansion - reducing bus contention, simplifying arbitration logic, and eliminating need for additional discrete enable logic in SN74AHCT541PW-based designs.
SN74AHCT541PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74AHCT541PW FAQ
1.How can I place an order for SN74AHCT541PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT541PW 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 SN74AHCT541PW reliable?
The price and inventory of SN74AHCT541PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT541PW is usually 5 days.
3.What payment methods are accepted for SN74AHCT541PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHCT541PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHCT541PW?
SN74AHCT541PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT541PW 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 SN74AHCT541PW?
For technical support, including SN74AHCT541PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT541PW requirements.
6.How does Aetrix verify that SN74AHCT541PW is sourced from the original manufacturer or authorized distributors?
All SN74AHCT541PW 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 SN74AHCT541PW meets industry standards.
7.What is the process for return or replacement of SN74AHCT541PW?
All SN74AHCT541PW units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT541PW, 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 SN74AHCT541PW part is unused and in its original packaging.
Return procedure for SN74AHCT541PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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