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Texas Instruments SN74AHC541DBRG4
- Part No.:
- SN74AHC541DBRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74AHC541DBRG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,951
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Product details
Overview
SN74AHC541DBRG4 from Texas Instruments is an octal noninverting buffer/driver with 3-state outputs, designed for bus line driving and memory address register buffering in 2V–5.5V systems. It features dual output-enable inputs (OE1/OE2), 20-pin SSOP package, ±25mA output drive per channel, and propagation delays as low as 3.5ns at 5V. Used in PC motherboard I/O expansion and server memory subsystems.
For engineers reviewing the SN74AHC541DBRG4 datasheet, SN74AHC541DBRG4 pinout, SN74AHC541DBRG4 application, or SN74AHC541DBRG4 equivalent, key selection criteria include 3-state control logic, VCC-tolerant inputs up to 5.5V, thermal resistance (RθJA = 99.9°C/W), bus contention avoidance, and compatibility with 3.3V/5V mixed-signal interfaces.
Technical Context
The SN74AHC541DBRG4 implements two independent 4-bit groups (A1–A4/Y1–Y4 and A5–A8/Y5–Y8), each controlled by a dedicated active-low output-enable input (OE1, OE2). Its CMOS AHC logic family delivers balanced rise/fall times and reduced output ringing via intentional slower edge rates (Δt/Δv = 20 ns/V at 5V).
Each output enters high-impedance state when its corresponding OE is high; both OEs must be low for data pass-through. Input overvoltage tolerance (up to 5.5V regardless of VCC) enables level translation from 5V logic to lower-VCC domains without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports mixed-voltage system interfacing and brown-out resilience down to 2V operation. |
| Output Drive | ±25 mA per output - sufficient for driving 50-pF loads on PCB traces or TTL-compatible inputs without external buffers. |
| tPLH / tPHL (5V) | 3.5 ns (typ), 6 ns (max) at CL = 15 pF - enables reliable timing in high-speed address/data latching up to ~100 MHz. |
| Input Voltage Tolerance | 0 V to 5.5 V - allows direct connection to 5V legacy peripherals while operating at 3.3V or 2.5V VCC for power savings. |
| IOZ (Off-State Leakage) | ±2.5 µA max at 5.5V - ensures minimal bus leakage during 3-state hold, critical for low-power standby modes. |
| RθJA (SSOP) | 99.9 °C/W - defines thermal derating limit; continuous 75 mA total output current requires <25°C ambient for safe operation. |
Pinout & Package
SN74AHC541DBRG4 uses a 20-pin SSOP (Shrink Small Outline Package) with 0.65 mm pitch, body size 7.50 mm × 5.30 mm, and JEDEC MO-153 compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low output enable inputs - independently disable Y1–Y4 (OE1) or Y5–Y8 (OE2); tie to VCC via pull-up for power-up high-Z safety. |
| 2–9 | A1–A8 | Noninverting data inputs - accept 5.5V-tolerant logic signals; must be terminated to VCC or GND if unused to prevent floating states. |
| 10 | GND | Ground reference - common return path for all internal logic and output drivers; requires low-inductance PCB connection. |
| 11–18 | Y1–Y8 | 3-state noninverting outputs - present A1–A8 when respective OE is low; enter high-impedance when OE is high. |
| 20 | VCC | Power supply - supplies core logic and output drivers; requires local 0.1 µF ceramic bypass capacitor adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | Operates from 2V to 5.5V - eliminates need for level shifters in multi-rail systems and extends battery life in portable 3.3V designs. |
| Overvoltage-Tolerant Inputs | Accepts up to 5.5V regardless of VCC - enables seamless interface between 5V microcontrollers and 3.3V FPGAs or ASICs. |
| Controlled Edge Rates | Δt/Δv = 20 ns/V at 5V - reduces EMI and output ringing on long traces, improving signal integrity without external damping resistors. |
| Low Power Consumption | ICC = 20 µA max at 5.5V - minimizes quiescent current in always-on I/O expanders and peripheral interface hubs. |
| Latch-Up Immunity | Exceeds 250 mA per JESD17 - ensures robustness against transient current faults in industrial environments with noisy power rails. |
Applications
| PC Motherboard I/O Expansion | Server Memory Address Buffering |
|---|---|
|
Use Scenario: Expanding legacy ISA or LPC bus signals from southbridge to add-on cards with impedance-matched trace routing. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating shared address/data lines; OE synchronized to bus grant handshake. Use Value: Prevents bus contention during hot-plug events and maintains signal integrity across 10+ inch PCB runs using slow-edge drive. |
Use Scenario: Driving parallel address lines from memory controller to multiple DDR SDRAM modules in dual-channel configurations. IC Role / Device Role / Timing Role: Octal address register buffer with independent OE control per memory bank group. Use Value: Enables bank-select isolation and reduces capacitive loading on controller outputs, improving setup/hold margin by >1.2 ns. |
| Industrial PLC Backplane Interface | Wearable Health Sensor Hub |
|
Use Scenario: Interfacing 24V-rated field I/O modules to 3.3V ARM-based controller via opto-isolated level-shifting stage. IC Role / Device Role / Timing Role: Bus driver translating isolated logic levels into clean, slew-controlled signals for FPGA configuration bus. Use Value: Eliminates need for discrete RC filters; ±25mA drive sustains signal integrity across 30 cm backplane traces at 10 MHz. |
Use Scenario: Multiplexing sensor data streams (ECG, SpO₂, accelerometer) onto shared SPI/I²C bus in ultra-low-power wearable patch. IC Role / Device Role / Timing Role: Low-quiescent-current buffer enabling selective sensor activation while maintaining bus isolation. Use Value: 20 µA ICC and 2V minimum VCC extend coin-cell battery life beyond 14 days in intermittent-sampling mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT541DBR | CMOS-to-TTL compatible inputs (VIH = 2.0V min at 4.5V); identical pinout and 3-state logic. | Better suited for interfacing with legacy 5V TTL peripherals where input threshold matching is critical. | Select when driving older 74LS/74ALS logic families; avoid if only CMOS-level signaling is used. |
| 74LVC541APW | Lower VCC range (1.65V–3.6V); higher speed (tPD = 2.5ns typ at 3.3V); same 20-pin TSSOP package. | Optimized for sub-3.3V mobile SoC interfaces; not 5.5V input-tolerant. | Choose for modern low-voltage designs requiring faster propagation and smaller die size; verify VCC compatibility first. |
Compared with SN74AHC541DBRG4, SN74AHCT541DBR offers TTL-compatible input thresholds for legacy integration, while 74LVC541APW provides faster switching and lower voltage operation but sacrifices 5.5V input tolerance-making SN74AHC541DBRG4 the optimal choice for mixed-voltage industrial and computing applications requiring robust overvoltage protection and thermal stability.
Availability
SN74AHC541DBRG4 is available at Aetrix Electronics and suitable for PC motherboard I/O expansion, server memory subsystems, industrial PLC backplanes, and wearable health sensor hubs requiring stable component supply across extended product lifecycles.
Supply support for SN74AHC541DBRG4 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 decades of heritage in high-reliability logic families and automotive-grade qualification.
The SN74AHC541DBRG4 belongs to TI's advanced high-speed CMOS (AHC) logic portfolio, engineered for noise-immune, low-power bus interfacing in computing, communications, and industrial control systems.
FAQ
What is the maximum output current rating per pin for SN74AHC541DBRG4?
The SN74AHC541DBRG4 supports ±25 mA continuous DC output current per Y1–Y8 pin, with a total device limit of ±75 mA across all outputs. Exceeding these values risks thermal shutdown or permanent damage. Derating is required above 25°C ambient per RθJA = 99.9°C/W.
Does SN74AHC541DBRG4 support 5V input signals when powered at 3.3V?
Yes, SN74AHC541DBRG4 features overvoltage-tolerant inputs rated for 0 V to 5.5 V regardless of VCC level. When operated at 3.3V, it safely accepts 5V logic inputs without clamping diodes or external protection, enabling direct interfacing with 5V microcontrollers.
How should unused input pins be handled on SN74AHC541DBRG4?
All unused A1–A8 and OE1/OE2 inputs on SN74AHC541DBRG4 must be tied to either VCC or GND to prevent floating states that cause increased ICC, erratic outputs, or ESD susceptibility. TI recommends tying OE pins to VCC via pull-up resistors to ensure power-up high-impedance safety.
What is the typical propagation delay of SN74AHC541DBRG4 at 3.3V supply?
At VCC = 3.3 V ± 0.3 V and CL = 15 pF, SN74AHC541DBRG4 exhibits tPLH/tPHL = 5 ns (typical) and tPZH/tPZL = 6 ns (typical). These values scale predictably with load capacitance-e.g., at 50 pF, delays increase to 7.5 ns (tPLH) and 8 ns (tPZH) respectively.
Is SN74AHC541DBRG4 RoHS compliant and lead-free?
Yes, SN74AHC541DBRG4 is RoHS-compliant and features NiPdAu (NIPDAU) lead finish. It carries MSL Level-1 rating (unlimited floor life) and is qualified for peak reflow temperatures up to 260°C, meeting IPC/JEDEC J-STD-020 standards for lead-free assembly.
SN74AHC541DBRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
SN74AHC541DBRG4 FAQ
1.How can I place an order for SN74AHC541DBRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC541DBRG4 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 SN74AHC541DBRG4 reliable?
The price and inventory of SN74AHC541DBRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC541DBRG4 is usually 5 days.
3.What payment methods are accepted for SN74AHC541DBRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC541DBRG4 transactions.
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4.How is shipping managed for SN74AHC541DBRG4?
SN74AHC541DBRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC541DBRG4 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 SN74AHC541DBRG4?
For technical support, including SN74AHC541DBRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC541DBRG4 requirements.
6.How does Aetrix verify that SN74AHC541DBRG4 is sourced from the original manufacturer or authorized distributors?
All SN74AHC541DBRG4 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 SN74AHC541DBRG4 meets industry standards.
7.What is the process for return or replacement of SN74AHC541DBRG4?
All SN74AHC541DBRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC541DBRG4, 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 SN74AHC541DBRG4 part is unused and in its original packaging.
Return procedure for SN74AHC541DBRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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