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Texas Instruments SN74HCT541PWR
- Part No.:
- SN74HCT541PWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74HCT541PWR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,332
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Product details
Overview
SN74HCT541PWR from Texas Instruments is an octal non-inverting buffer/line driver with 3-state outputs, designed for bus interface and load-driving applications in 5-V TTL-compatible digital systems. It operates from 4.5 V to 5.5 V, delivers ±6 mA output drive at 5 V, exhibits typical propagation delay of 12 ns (VCC = 5.5 V, CL = 50 pF), and consumes ≤80 µA quiescent current.
For engineers reviewing the SN74HCT541PWR datasheet, SN74HCT541PWR pinout, SN74HCT541PWR application, or SN74HCT541PWR equivalent, key selection criteria include its dual 3-state enable inputs (OE1/OE2), data-flow-through pinout (inputs on one side, outputs on the other), TTL-voltage-compatible inputs, and high-current 3-state outputs capable of driving up to 15 LSTTL loads.
Technical Context
The SN74HCT541PWR implements eight independent non-inverting buffers, each with true (non-inverted) output logic. Its 3-state control uses a 2-input NOR gate: either OE1 or OE2 high forces all eight Y outputs into high-impedance mode. This architecture enables bidirectional bus control without external logic.
Designed as a performance- and pinout-enhanced variant of the 'HC240 family, it features input and output terminals arranged on opposite sides of the TSSOP-20 package - a layout optimization that reduces PCB trace crossovers and simplifies routing in dense digital interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and mixed-voltage logic systems. |
| Output Drive | ±6 mA at 5 V - sufficient to directly interface with system buses or drive up to 15 LSTTL loads without buffering. |
| Propagation Delay | 12 ns typical (VCC = 5.5 V, CL = 50 pF) - supports high-speed data transfer in timing-critical digital subsystems. |
| Quiescent Current | 80 µA max - enables low-power operation in standby or lightly loaded states. |
| Input Compatibility | TTL-voltage compatible (VIH = 2 V, VIL = 0.8 V) - accepts standard TTL logic levels without level-shifting circuitry. |
| 3-State Enable | Dual active-low enables (OE1, OE2) with NOR logic - allows flexible bus arbitration using either or both controls. |
| Input Leakage | 1 µA max - minimizes unintended current paths and ensures stable logic thresholds with high-impedance sources. |
Pinout & Package
TSSOP-20 package (6.50 mm × 4.40 mm, 1.2 mm max height), lead-free (NIPDAU), RoHS-compliant, moisture sensitivity level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Input A1–A8 | True logic inputs driving corresponding Y outputs; TTL-compatible voltage thresholds. |
| 9, 19 | Output Enable OE1, OE2 | Active-low NOR-gated enables - either high disables all outputs to high-Z state. |
| 10, 11, 12, 13, 14, 15, 16, 18 | Output Y1–Y8 | Non-inverting buffered outputs with ±6 mA drive capability and 3-state control. |
| 17 | VCC | Positive supply (4.5–5.5 V); requires local 0.1-µF bypass capacitor per TI recommendation. |
| 20 | GND | Ground reference; must be low-impedance connection for signal integrity and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Data-flow-through pinout | Inputs (A1–A8) on left side, outputs (Y1–Y8) on right side - eliminates layer crossovers and eases PCB routing in bus architectures. |
| Dual 3-state enable logic | OE1 and OE2 connected via internal NOR gate - supports redundant or split enable schemes for fault-tolerant bus control. |
| High-current 3-state outputs | ±6 mA drive at 5 V - eliminates need for external drivers when interfacing with LSTTL loads or backplane traces. |
| TTL-voltage-compatible inputs | VIH = 2 V, VIL = 0.8 V - interoperates directly with legacy TTL, 74LS, and mixed-logic systems without level shifters. |
| Low power consumption | 80 µA max ICC - reduces system-level heat generation and extends battery life in portable 5-V logic applications. |
Applications
| Industrial PLC I/O Expansion | Embedded Microcontroller Bus Interface |
|---|---|
Use Scenario: Expanding GPIO count of an industrial PLC CPU module to drive discrete sensors and actuators across a backplane. IC Role / Device Role / Timing Role: SN74HCT541PWR acts as a unidirectional bus buffer, isolating the MCU bus from higher-capacitance field wiring while enabling hot-swap-safe 3-state control. Use Value: Its ±6 mA drive and 15-LSTTL load capability eliminate external transistor arrays; dual OE pins allow synchronized enable/disable during configuration changes. | Use Scenario: Interfacing an ARM Cortex-M microcontroller's parallel address/data bus to external SRAM or FPGA configuration memory. IC Role / Device Role / Timing Role: SN74HCT541PWR serves as a non-inverting line driver, translating MCU logic levels to robust bus signals with controlled rise/fall times (tt ≤ 14 ns). Use Value: 12 ns typical tpd ensures timing margin compliance in 20+ MHz bus cycles; TSSOP-20 footprint saves board space versus SOIC alternatives. |
| Test Equipment Digital Pattern Generator | Automotive Body Control Module |
Use Scenario: Generating precise digital stimulus waveforms in automated test equipment where multiple parallel channels require synchronized output control. IC Role / Device Role / Timing Role: SN74HCT541PWR functions as a channel-enableable buffer bank, with OE1/OE2 used to gate groups of 4 outputs independently. Use Value: Dual enable logic permits sub-cycle waveform gating; low 1 µA input leakage prevents signal degradation during long idle periods between test vectors. | Use Scenario: Driving LED indicators, relay coils, and diagnostic status lines in an automotive BCM operating from a regulated 5-V rail. IC Role / Device Role / Timing Role: SN74HCT541PWR provides isolated, current-boosted outputs for discrete loads while supporting diagnostic pulsing via 3-state control. Use Value: High-impedance disable state allows safe in-system probing; 84.6 °C/W RθJA (TSSOP) supports operation within automotive ambient limits (-40 °C to +85 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT240PW | Inverting outputs; dual 3-state enables with NAND logic (active-high OE) | Suitable where signal inversion is acceptable or required for bus polarity correction | Select SN74HCT240PW only if inverted logic is needed; SN74HCT541PWR is preferred for true-buffer applications. |
| SN74LVC541APW | 3.3-V only operation (1.65–3.6 V); lower drive (±24 mA), faster tpd (5.5 ns typical) | Requires level translation when interfacing with 5-V systems; not drop-in compatible | Choose SN74LVC541APW for 3.3-V-only designs prioritizing speed and lower voltage; SN74HCT541PWR remains optimal for 5-V TTL compatibility. |
Compared with SN74HCT240PW and SN74LVC541APW, the SN74HCT541PWR uniquely combines true (non-inverting) output logic, 5-V TTL compatibility, and dual-NOR 3-state control - making it the only direct replacement for legacy 'HC240-based designs requiring signal integrity and bus layout efficiency.
Availability
SN74HCT541PWR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, embedded microcontroller bus interface, and automotive body control modules requiring stable component supply and long-term production continuity.
Supply support for SN74HCT541PWR 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 industrial, automotive, and consumer applications.
The SN74HCT541PWR belongs to TI's HCT logic family - engineered for 5-V TTL-compatible operation with CMOS power efficiency, targeting bus interface, memory addressing, and general-purpose digital signal conditioning.
FAQ
What is the recommended supply decoupling for SN74HCT541PWR?
TI recommends a 0.1-µF ceramic bypass capacitor placed as close as possible to the VCC pin (Pin 17) of the SN74HCT541PWR. For enhanced noise suppression, this may be paralleled with a 1-µF capacitor. The SN74HCT541PWR datasheet specifies this practice to prevent power rail disturbances during output switching transitions, especially critical in high-speed or noise-sensitive environments where the SN74HCT541PWR is deployed.
Does SN74HCT541PWR support hot-swap or live-insertion?
The SN74HCT541PWR does not include built-in hot-swap protection circuitry. However, its 3-state outputs and defined absolute maximum ratings (e.g., ±20 mA clamp current) allow controlled insertion if power sequencing and bus pre-charging are managed externally. When designing for live insertion, ensure OE1 and OE2 are held high (disabled) until VCC stabilizes, then assert low enables - a method validated in systems using the SN74HCT541PWR for modular I/O cards.
What is the function of the two output-enable inputs (OE1 and OE2) on SN74HCT541PWR?
The SN74HCT541PWR uses a 2-input NOR gate internally to combine OE1 and OE2: if either input is high, all eight Y outputs enter high-impedance state. Both must be low for normal buffered operation. This design allows flexible bus arbitration - for example, OE1 can serve as primary enable while OE2 acts as fault-safety override. The SN74HCT541PWR functional table confirms this behavior across all temperature ranges.
Can SN74HCT541PWR drive a 50-pF load with guaranteed timing?
Yes - the SN74HCT541PWR switching characteristics are explicitly characterized at CL = 50 pF and CL = 150 pF. At VCC = 5.5 V and TA = 25 °C, its typical propagation delay (tpd) is 12 ns and maximum is 31 ns under 50-pF loading. These values are measured per JEDEC-standard load circuits and apply directly to the SN74HCT541PWR in real-world PCB trace and receiver capacitance scenarios.
Is SN74HCT541PWR pin-compatible with SN74HCT541N (PDIP-20)?
Yes - the SN74HCT541PWR (TSSOP-20) and SN74HCT541N (PDIP-20) share identical pin numbering, pin functions, and logic behavior. Both follow the same 20-pin layout with inputs A1–A8 on Pins 1–8, OE1/OE2 on Pins 9/19, outputs Y1–Y8 on Pins 10/11/12/13/14/15/16/18, VCC on Pin 17, and GND on Pin 20. This pin-to-pin compatibility enables drop-in replacement in existing designs, though thermal and layout considerations differ due to package geometry.
SN74HCT541PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCT
- 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:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74HCT541PWR FAQ
1.How can I place an order for SN74HCT541PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HCT541PWR 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 SN74HCT541PWR reliable?
The price and inventory of SN74HCT541PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HCT541PWR is usually 5 days.
3.What payment methods are accepted for SN74HCT541PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HCT541PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HCT541PWR?
SN74HCT541PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HCT541PWR 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 SN74HCT541PWR?
For technical support, including SN74HCT541PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HCT541PWR requirements.
6.How does Aetrix verify that SN74HCT541PWR is sourced from the original manufacturer or authorized distributors?
All SN74HCT541PWR 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 SN74HCT541PWR meets industry standards.
7.What is the process for return or replacement of SN74HCT541PWR?
All SN74HCT541PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74HCT541PWR, 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 SN74HCT541PWR part is unused and in its original packaging.
Return procedure for SN74HCT541PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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