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onsemi 74AC541SJX
- Part No.:
- 74AC541SJX
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
74AC541SJX.pdf
- Description:
- IC BUFF NON-INVERT 6V 20SOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,382
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Product details
Overview
74AC541SJX from onsemi is an octal non-inverting buffer/line driver with 3-state outputs, designed for memory and address bus driving, clock distribution, and microprocessor output port interfacing. It operates at 2.0–6.0 V supply, delivers ±24 mA output drive, features flow-through pinout (inputs on one side, outputs on the other), and supports industrial temperature range (−40°C to +85°C).
For engineers reviewing the 74AC541SJX datasheet, pinout, applications, or equivalent options, key selection criteria include 3-state bus contention control, TTL-compatible input thresholds only in ACT variant (not applicable here), SOIC-20W package compatibility, and AC-series propagation delay (≤9.0 ns at 5.0 V, CL = 50 pF).
Technical Context
The 74AC541SJX implements eight independent non-inverting buffers, each with separate 3-state enable control via dual active-low OE inputs (OE1 and OE2). Its flow-through architecture places all eight inputs on pins 1–8 and outputs on pins 13–20, enabling direct microprocessor data bus routing without layer crossover.
It uses advanced CMOS (AC) logic with Schmitt-trigger noise immunity on inputs, supports rail-to-rail output swing (VOH ≥ 5.4 V, VOL ≤ 0.1 V at VCC = 5.5 V), and exhibits low ICC (≤40 µA) and low IOZ (≤2.5 µA) in quiescent and high-impedance states - critical for low-power bus-hold and hot-swap applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - enables operation across 3.3 V and 5 V systems without level translation |
| Output Drive Strength | ±24 mA - sufficient to drive 50 Ω transmission lines or multiple TTL loads directly |
| Propagation Delay (tPLH/tPHL) | ≤6.5 ns at VCC = 5.0 V, CL = 50 pF - ensures timing compliance in high-speed address/data buses |
| 3-State Enable/Disable Time | tPZH ≤ 9.5 ns, tPHZ ≤ 10.5 ns - minimizes bus turnaround latency in bidirectional communication |
| Input Thresholds (VIH/VIL) | VIH = 3.85 V, VIL = 1.65 V at VCC = 5.5 V - compatible with CMOS-level signaling, not TTL |
| Quiescent Supply Current | ICC ≤ 40 µA - reduces static power in always-on bus interface circuits |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded and control applications |
Pinout & Package
74AC541SJX is packaged in SOIC-20W (Case 751BJ), 300-mil wide-body surface-mount package with 1.27 mm pitch, JEDEC MS-013 compliant, Pb-free, and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8 | Data Inputs (I1–I8) | CMOS-compatible digital inputs accepting 2.0–6.0 V logic levels; no internal pull-ups |
| 9, 10 | Output Enables (OE1, OE2) | Active-low controls; both must be LOW to enable all eight outputs simultaneously |
| 11, 12 | GND, VCC | Power supply reference and supply rail; decoupling capacitor placement near these pins is mandatory |
| 13–20 | 3-State Outputs (Y1–Y8) | Non-inverting buffered outputs; HIGH-Z when either OE1 or OE2 is HIGH |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Inputs (pins 1–8) and outputs (pins 13–20) on opposite sides - simplifies PCB trace routing and improves signal integrity in dense layouts |
| 3-state bus interface | Dual active-low OE inputs allow synchronized enable/disable of all eight drivers - prevents bus contention in shared-data-path systems |
| High-output current drive | ±24 mA per output - eliminates need for external buffer stages when driving terminated lines or multiple gate inputs |
| Low dynamic power | CPD = 30 pF - reduces switching power dissipation in high-frequency bus applications (e.g., 10 MHz address strobes) |
| Pb-free and RoHS-compliant | Meets EU Directive 2011/65/EU - supports environmentally compliant manufacturing and export requirements |
Applications
| Memory Address Buffering | Microprocessor Output Port |
|---|---|
Use Scenario: Driving 16-bit address bus from a microcontroller to SRAM or Flash memory. IC Role / Device Role / Timing Role: Non-inverting octal buffer with 3-state control synchronizing address latching and bus release. Use Value: Flow-through pinout allows straight-line routing; ±24 mA drive ensures clean edges into 50 Ω traces and capacitive loads up to 50 pF. |
Use Scenario: Expanding GPIO capability of an 8-bit MCU to drive external peripherals via parallel interface. IC Role / Device Role / Timing Role: Bidirectional bus driver enabled/disabled by MCU-controlled OE signals during read/write cycles. Use Value: Dual OE inputs permit independent control groups; tPHZ ≤ 10.5 ns enables sub-100 ns bus turnaround for real-time I/O response. |
| Industrial PLC Backplane | Legacy ISA Bus Interface |
Use Scenario: Level-shifting and fan-out buffering between isolated controller modules on a 24 V industrial backplane. IC Role / Device Role / Timing Role: Isolated bus driver providing noise-immune signal conditioning and load isolation. Use Value: VIH/VIL thresholds reject common-mode noise; ICC ≤ 40 µA minimizes heat buildup in sealed enclosures. |
Use Scenario: Interfacing modern low-voltage logic to legacy 5 V ISA expansion slots in test equipment. IC Role / Device Role / Timing Role: Voltage-tolerant buffer translating between 3.3 V control logic and 5 V bus signaling standards. Use Value: 2.0–6.0 V supply range supports direct 5 V operation; tPLH ≤ 6.5 ns meets ISA timing budgets for address setup/hold. |
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 |
|---|---|---|---|
| 74AC244SCX | Octal non-inverting buffer with identical AC logic family, same SOIC-20 package, but single OE input (not dual) | Lacks independent OE1/OE2 grouping - less flexible for split-bus enable control | Select when simplified enable logic suffices and dual-OE granularity is unnecessary |
| SN74LVTH244APWR | TTL-compatible inputs, 3.3 V only (VCC = 2.7–3.6 V), higher drive (±64 mA), different pinout (TSSOP-20) | Not voltage-compatible with 5 V systems; requires level shifting if interfacing to 5 V buses | Select for 3.3 V-only designs requiring higher drive or LVTH noise margin, not as drop-in replacement |
Compared with 74AC541SJX, 74AC244SCX offers simpler enable control but reduced bus partitioning flexibility, while SN74LVTH244APWR provides superior noise immunity and drive at the cost of 5 V incompatibility and non-pin-compatible layout.
Availability
74AC541SJX is available at Aetrix Electronics and suitable for memory subsystems, microprocessor I/O expansion, industrial backplane interfaces, and legacy bus bridging requiring stable component supply and long-term industrial qualification.
Supply support for 74AC541SJX 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The 74AC541SJX belongs to onsemi's legacy AC logic family - engineered for high-speed, low-power CMOS bus interfacing in industrial and computing infrastructure where reliability, timing precision, and wide supply tolerance are essential.
FAQ
What is the maximum operating supply voltage for the 74AC541SJX?
The 74AC541SJX supports a supply voltage range of 2.0 V to 6.0 V DC, with absolute maximum rating of −0.5 V to +6.5 V. Operation above 6.0 V risks permanent damage; sustained use at 5.5 V is fully specified per datasheet DC characteristics and recommended for robust 5 V system integration.
Does the 74AC541SJX have TTL-compatible inputs?
No, the 74AC541SJX does not have TTL-compatible inputs. It belongs to the AC logic family and specifies VIH = 3.85 V and VIL = 1.65 V at VCC = 5.5 V - thresholds aligned with CMOS levels. For TTL compatibility, the pin-compatible 74ACT541 variant must be used instead.
What is the function of the dual OE inputs (pins 9 and 10) on the 74AC541SJX?
Pins 9 (OE1) and 10 (OE2) are active-low 3-state enable inputs. All eight outputs go HIGH-Z only when at least one of OE1 or OE2 is HIGH. Both must be LOW to enable all outputs. This dual-enable structure allows grouped bus control - for example, using OE1 for address lines and OE2 for data lines in split-bus architectures.
Can the 74AC541SJX drive a 50 Ω transmission line directly?
Yes, the 74AC541SJX can drive a 50 Ω transmission line directly: its ±24 mA output drive capability supports a 50 Ω load at 5 V (requiring ~100 mA peak for full swing), and its tPLH/tPHL ≤ 6.5 ns ensures signal integrity up to ~50 MHz edge rates. Layout best practices (controlled impedance, termination, decoupling) remain essential.
Is the 74AC541SJX pin-compatible with the 74AC540SJX?
Yes, the 74AC541SJX is the non-inverting counterpart of the inverting 74AC540SJX and shares identical pinout, package (SOIC-20W), and electrical specifications - differing only in logic polarity. Both devices use the same flow-through architecture and dual-OE control, enabling direct functional substitution where inversion is not required.
74AC541SJX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74AC
- Package/Case:
- 20-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOP
74AC541SJX FAQ
1.How can I place an order for 74AC541SJX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC541SJX 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 74AC541SJX reliable?
The price and inventory of 74AC541SJX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC541SJX is usually 5 days.
3.What payment methods are accepted for 74AC541SJX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC541SJX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC541SJX?
74AC541SJX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC541SJX 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 74AC541SJX?
For technical support, including 74AC541SJX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC541SJX requirements.
6.How does Aetrix verify that 74AC541SJX is sourced from the original manufacturer or authorized distributors?
All 74AC541SJX 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 74AC541SJX meets industry standards.
7.What is the process for return or replacement of 74AC541SJX?
All 74AC541SJX units undergo pre-shipment inspection (PSI). If there is an issue with 74AC541SJX, 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 74AC541SJX part is unused and in its original packaging.
Return procedure for 74AC541SJX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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