My Inquiry
My Account
Texas Instruments SN74AHC541PW
- Part No.:
- SN74AHC541PW
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHC541PW.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,356
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74AHC541PW 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 active-low output enables (OE1/OE2), 20-pin TSSOP packaging, ±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 SN74AHC541PW datasheet, SN74AHC541PW pinout, SN74AHC541PW application, or SN74AHC541PW equivalent, key selection criteria include 3-state control logic, VCC-compatible input overvoltage tolerance (up to 5.5V), thermal resistance (RθJA = 116.8°C/W), and compatibility with 15–50pF load conditions across industrial temperature range (–40°C to 125°C).
Technical Context
The SN74AHC541PW implements dual independent 3-state enable logic via two active-low AND-gated controls (OE1 and OE2), allowing selective disabling of two groups of four outputs each. Its CMOS AHC-family architecture delivers balanced rise/fall times and reduced output ringing through controlled edge rates (100 ns/V at 3.3V, 20 ns/V at 5V).
It supports voltage translation: inputs tolerate up to 5.5V regardless of VCC (2–5.5V), enabling down-translation from 5V logic to lower-voltage buses. The device is not intended for hot-swap or live-insertion without external current limiting, as its absolute maximum continuous output current is ±25mA per pin and ±75mA total.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2V to 5.5V - Enables interoperability across 2.5V, 3.3V, and 5V logic domains without level shifters. |
| Output Drive | ±25mA per output - Sufficient to drive standard TTL loads and moderate-capacitance PCB traces (≤50pF) without external buffers. |
| tPLH/tPHL (5V) | 3.5ns typical (CL=15pF) - Supports high-speed data latching in memory address and peripheral interface applications up to ~100MHz. |
| Input Overvoltage | VI up to 5.5V - Allows direct connection to legacy 5V buses while operating at 3.3V or 2.5V VCC, simplifying mixed-voltage system design. |
| ESD Rating | HBM ±2000V - Meets industrial handling requirements; no additional ESD protection needed on board for typical assembly environments. |
| RθJA | 116.8°C/W (TSSOP-20) - Requires thermal-aware layout (e.g., copper pour under exposed pad if present) for sustained operation near max ambient (125°C). |
| ICC (Quiescent) | 4µA typical (5.5V) - Ultra-low static power ideal for always-on I/O buffers in battery-backed or energy-sensitive subsystems. |
Pinout & Package
TSSOP-20 package (PW): 6.50mm × 6.4mm body size, 0.65mm lead pitch, thin profile suitable for space-constrained PCB layouts. Pin 1 marked by beveled corner; top view orientation per Figure 4-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low 3-state enables - Asserting either disables its associated four outputs (OE1→Y1–Y4; OE2→Y5–Y8); both must be low for full output activation. |
| 2–9 | A1–A8 | Buffer inputs - Noninverting logic inputs accepting 0–5.5V; internally clamped, tolerant of floating states only when externally biased. |
| 11–18 | Y1–Y8 | Buffer outputs - 3-state CMOS outputs with ±25mA drive; high-impedance when corresponding OE is high; no internal pull-ups/downs. |
| 10 | GND | Ground reference - Must be connected to system ground plane; decoupling capacitor (0.1µF) required within 5mm of pin. |
| 20 | VCC | Power supply - Supplies core logic and output drivers; requires local bypassing and clean regulation; supports 2V–5.5V operation. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (2V–5.5V) | Enables single-buffer deployment across multiple voltage rails-eliminates need for separate 3.3V/5V buffer families in mixed-supply systems. |
| Dual independent 3-state enables | Allows partitioned bus control: e.g., OE1 manages address lines A0–A3, OE2 manages data lines D0–D3-reducing contention risk in multi-master configurations. |
| Input overvoltage tolerance (5.5V) | Permits direct interfacing with 5V microcontrollers or FPGAs while VCC runs at 3.3V-no external level translators required for down-translation. |
| Controlled edge rate (20–100 ns/V) | Reduces EMI and signal integrity issues (ringing/overshoot) on unterminated or lightly loaded traces-critical for compact PCBs with tight routing. |
| Low ICC (4µA typical) | Minimizes standby power in always-active I/O hubs (e.g., PCIe slot presence detection, SMBus address buffers), extending system-level energy efficiency. |
Applications
| PC Motherboard I/O Expansion | Server Memory Address Buffering |
|---|---|
Use Scenario: Expanding legacy ISA or LPC bus signals from southbridge to add-in cards with timing-critical strobes and address lines. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control isolates southbridge outputs during bus arbitration; enables/disables groups of signals via OE1/OE2. Use Value: Prevents bus contention during hot-plug events; ±25mA drive ensures clean edges into 30pF trace + connector loads at 33MHz. | Use Scenario: Driving DDR4/DDR5 memory module address/command buses from memory controller, where signal integrity and low skew are critical. IC Role / Device Role / Timing Role: Address register buffer-latches and re-drives row/column/address bits with matched tPLH/tPHL to minimize skew across 8-bit bus. Use Value: 3.5ns propagation delay at 5V and <1.5ns output skew ensure setup/hold timing margins are maintained across full temperature range. |
| Industrial PLC Backplane Interface | Wearable Health Device Sensor Hub |
Use Scenario: Interfacing microcontroller GPIOs to modular I/O cards over 200mm backplane traces with 40pF capacitance per line. IC Role / Device Role / Timing Role: Bus driver with slow-edge optimization-reduces reflections on long traces without requiring series termination resistors. Use Value: Controlled 20 ns/V edge rate suppresses ringing below –40dB, eliminating false triggering in noise-sensitive analog input modules. | Use Scenario: Multiplexing biopotential sensor outputs (ECG, PPG) to a low-power MCU ADC input with minimal added noise and leakage. IC Role / Device Role / Timing Role: Low-leakage (±0.1µA max II) signal gate-enables/disables sensor channels under firmware control to reduce idle current. Use Value: 4µA max ICC and ±0.1µA input leakage extend battery life in 7-day wearable cycles; 2V min VCC supports direct coin-cell (3V) operation. |
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 |
|---|---|---|---|
| SN74LVC541APW | Lower VCC range (1.65V–3.6V); higher drive (±24mA); faster tPLH (2.5ns @ 3.3V); no 5.5V input tolerance. | Suitable only for 3.3V-only systems; cannot interface 5V peripherals without external level shifting. | Select when operating exclusively at 3.3V and requiring tighter timing budgets; avoid if 5V signal compatibility is needed. |
| 74AHC244PW | Identical AHC family, same VCC range and pinout; differs in enable logic (single OE controlling all 8 outputs vs. dual OE). | Lacks independent group control-less flexible for partial bus gating; otherwise functionally interchangeable for full-bus enable use cases. | Choose when simplified control (one OE) suffices and dual-enable partitioning is unnecessary; identical thermal and drive specs. |
Compared with SN74LVC541APW and 74AHC244PW, the SN74AHC541PW uniquely balances 5.5V input tolerance, dual-OE flexibility, and industrial temperature support-making it optimal for mixed-voltage, space-constrained, and thermally demanding embedded interfaces where partial bus control and legacy compatibility are required.
Availability
SN74AHC541PW is available at Aetrix Electronics and suitable for PC motherboard I/O expansion, server memory subsystems, and industrial PLC backplane interfaces requiring stable component supply and long-term obsolescence management.
Supply support for SN74AHC541PW 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 connectivity technologies, with decades of experience in logic IC design and high-reliability manufacturing.
The SN74AHC541PW belongs to TI's advanced high-speed CMOS (AHC) logic family, engineered for low-power, high-noise-immunity digital interfacing in computing, communications, and industrial control systems.
FAQ
What is the maximum operating temperature range for the SN74AHC541PW?
The SN74AHC541PW is rated for operation from –40°C to +125°C ambient temperature. This industrial-grade range is validated per the manufacturer's recommended operating conditions and applies to the TSSOP-20 (PW) package variant. Thermal derating is required above 85°C ambient if power dissipation exceeds 150mW, based on its RθJA of 116.8°C/W.
Can the SN74AHC541PW safely interface a 5V microcontroller with a 3.3V FPGA?
Yes, the SN74AHC541PW can safely interface a 5V microcontroller with a 3.3V FPGA because its inputs tolerate voltages up to 5.5V regardless of VCC level. When powered at VCC = 3.3V, the SN74AHC541PW accepts 5V logic-high inputs and outputs 3.3V-compatible levels-enabling robust down-translation without external level shifters.
Does the SN74AHC541PW have built-in ESD protection, and what is its rating?
Yes, the SN74AHC541PW includes integrated ESD protection rated per JEDEC standards: ±2000V HBM (Human Body Model) and ±1000V CDM (Charged-Device Model) on all pins. These ratings meet typical industrial handling requirements and eliminate the need for discrete TVS diodes in most board-level ESD protection schemes.
How does the dual-output-enable (OE1/OE2) architecture of the SN74AHC541PW improve system design?
The dual OE architecture of the SN74AHC541PW allows independent control of two 4-bit groups (Y1–Y4 and Y5–Y8), reducing bus contention risk in multi-peripheral systems. For example, OE1 can gate address lines while OE2 gates data lines-enabling precise timing isolation and eliminating the need for additional logic gates or discrete enable sequencing circuitry in complex I/O hubs.
Is the SN74AHC541PW pin-compatible with other packages in the SN74AHC541 family?
No-the SN74AHC541PW (TSSOP-20) shares identical pin functions and numbering with other 20-pin variants (e.g., DB, DGV, DW, NS), but mechanical dimensions, thermal characteristics, and solder reflow profiles differ. While electrical behavior is consistent, PCB layout and thermal management must be validated separately for each package type; direct footprint substitution is not supported.
SN74AHC541PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- 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:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74AHC541PW FAQ
1.How can I place an order for SN74AHC541PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC541PW 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 SN74AHC541PW reliable?
The price and inventory of SN74AHC541PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC541PW is usually 5 days.
3.What payment methods are accepted for SN74AHC541PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC541PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHC541PW?
SN74AHC541PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC541PW 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 SN74AHC541PW?
For technical support, including SN74AHC541PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC541PW requirements.
6.How does Aetrix verify that SN74AHC541PW is sourced from the original manufacturer or authorized distributors?
All SN74AHC541PW 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 SN74AHC541PW meets industry standards.
7.What is the process for return or replacement of SN74AHC541PW?
All SN74AHC541PW units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC541PW, 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 SN74AHC541PW part is unused and in its original packaging.
Return procedure for SN74AHC541PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74AHC541PW Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
