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Texas Instruments SN74AHCT541IDWREP
- Part No.:
- SN74AHCT541IDWREP
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74AHCT541IDWREP.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,374
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Product details
Overview
SN74AHCT541IDWREP from Texas Instruments is an octal noninverting 3-state buffer/driver IC designed for bus line driving and memory address register buffering. It features dual active-low output-enable inputs (OE1, OE2), TTL-compatible inputs, 8-bit noninverted data path, ±25 mA output drive, and operation across −40°C to 85°C.
For engineers reviewing the SN74AHCT541IDWREP datasheet, SN74AHCT541IDWREP pinout, SN74AHCT541IDWREP application, or SN74AHCT541IDWREP equivalent, key selection criteria include 3-state control logic, SOIC-20 package compatibility, bus isolation capability, and industrial-temperature reliability with enhanced DMS support.
Technical Context
This device implements eight independent noninverting buffer channels, each controlled by a 2-input AND gate with active-low enables-ensuring high-impedance outputs when either OE1 or OE2 is high. Input thresholds are TTL-compatible (VIL = 0.8 V, VIH = 2 V), enabling direct interfacing with legacy 5-V TTL logic without level translation.
Propagation delays are specified at 4.1–6.5 ns (A→Y) and 4.5–8 ns (OE→Y) under 15-pF load, supporting reliable timing in high-speed digital systems. The design includes latch-up immunity (>250 mA per JESD 17) and robust ESD protection (2000-V HBM, 200-V MM, 1000-V CDM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures stable operation with standard 5-V rail and tolerance for supply ripple. |
| Output Drive | ±25 mA - sufficient to drive multiple CMOS/TTL loads or moderate PCB trace capacitance. |
| Propagation Delay | 4.1 ns min (A→Y, CL = 15 pF) - supports >100 MHz bus toggle rates in point-to-point configurations. |
| Input Compatibility | TTL voltage levels - eliminates need for external level shifters when interfacing with legacy 5-V TTL devices. |
| Operating Temperature | −40°C to +85°C - qualified for extended industrial environments without derating. |
| 3-State Enable Logic | Active-low dual OE (OE1 ∧ OE2) - provides flexible bus arbitration via independent enable control per group. |
| Quiescent Current | 4 µA typical (ICC) - minimizes standby power in always-on control subsystems. |
Pinout & Package
SN74AHCT541IDWREP is housed in a 20-pin SOIC (DW) package, 7.5 mm wide, 12.8 mm long, 2.65 mm max height, with 1.27 mm pitch and gull-wing leads. Pin 1 identifier located at top-left corner (Q1 quadrant in tape).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE1, OE2 | Active-low 3-state enable inputs | AND-gated control: either high forces all Y outputs into high-Z - critical for bus contention avoidance. |
| A1–A8 | Data inputs | Noninverting input terminals for each of eight buffer channels - accept TTL/CMOS logic levels. |
| Y1–Y8 | Buffered outputs | True (noninverted) outputs with 3-state capability - placed opposite A-side to simplify PCB routing. |
| VCC, GND | Power supply pins | Single 5-V supply; decoupling required near pin 20 (VCC) and pin 10 (GND) for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced DMS Support | Controlled baseline with single assembly/test/fab site - ensures long-term supply continuity for military and aerospace programs. |
| Latch-Up Immunity | Exceeds 250 mA per JESD 17 - prevents destructive latch-up during transient overvoltage or hot-insertion events. |
| ESD Robustness | 2000-V HBM, 200-V MM, 1000-V CDM - reduces field failure risk in handling and system-level ESD stress. |
| Bus-Friendly Layout | Inputs and outputs on opposite package sides - minimizes trace crossovers and improves signal integrity on dense PCBs. |
| Power-Up Safety | OE tied to VCC via pullup ensures high-Z state at power-on - prevents bus conflicts during system initialization. |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Isolating microcontroller GPIOs from noisy 24-V I/O expansion cards in programmable logic controllers. IC Role / Device Role / Timing Role: Octal buffer providing bidirectional bus isolation and level-consistent signal conditioning between MCU and peripheral modules. Use Value: Prevents ground bounce and back-driving during hot-swap operations while maintaining <6.5 ns propagation delay for deterministic scan-cycle timing. | Use Scenario: Driving multiplexed LED displays and relay drivers in centralized body electronics units. IC Role / Device Role / Timing Role: Noninverting buffer amplifying low-current MCU outputs to drive higher-capacitance display segments and coil loads. Use Value: Delivers ±25 mA per channel to sink/source display segment current without external transistors, reducing BOM count. |
| Test Equipment Digital Pattern Generator | Medical Diagnostic Data Acquisition Board |
Use Scenario: Conditioning and gating parallel test vectors from FPGA-based pattern generators before applying to DUT pins. IC Role / Device Role / Timing Role: 3-state buffer enabling precise timing-controlled signal injection and isolation during functional test sequences. Use Value: Dual OE inputs allow synchronized enable/disable of two 4-bit groups, supporting interleaved test mode switching with sub-8 ns edge control. | Use Scenario: Buffering ADC address/control lines and sensor interface buses in portable ultrasound or ECG front-ends. IC Role / Device Role / Timing Role: Signal integrity-preserving buffer isolating sensitive analog subsystems from digital switching noise on shared PCB layers. Use Value: Low 12 pF power dissipation capacitance (Cpd) minimizes dynamic loading on timing-critical control paths, preserving sampling accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT244DWR | Same function, identical SOIC-20 package, but dual 4-bit groups with separate OE controls per group (OE1A/OE1B, OE2A/OE2B). | Offers finer-grained enable control for asymmetric bus partitioning - useful when only half the bus requires gating. | Select SN74AHCT244DWR if independent enable control per 4-bit subset is required; otherwise SN74AHCT541IDWREP provides simpler dual-OE logic. |
| SN74LVC541APWRE4 | Lower-voltage operation (1.65–3.6 V), smaller TSSOP-20 package, 24 mA drive, and faster typical propagation (3.5 ns). | Targeted at mixed-voltage 3.3-V systems; not pin-compatible due to different pinout and voltage domain constraints. | Choose SN74LVC541APWRE4 only for 3.3-V designs requiring lower power and smaller footprint; SN74AHCT541IDWREP remains optimal for 5-V industrial bus interfaces. |
Compared with SN74AHCT244DWR and SN74LVC541APWRE4, SN74AHCT541IDWREP delivers verified 5-V TTL compatibility, industrial temperature range, and DMS-qualified supply chain stability - making it the preferred choice for legacy 5-V backplane and control bus applications where long-term availability and electrical interoperability are mandatory.
Availability
SN74AHCT541IDWREP is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical diagnostic equipment requiring stable component supply across extended product lifecycles.
Supply support for SN74AHCT541IDWREP 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 high-reliability logic and interface solutions.
SN74AHCT541IDWREP belongs to TI's enhanced-product (EP) logic family, engineered for extended temperature operation, controlled manufacturing baselines, and diminished manufacturing sources support - specifically targeting defense, aerospace, and critical industrial systems.
FAQ
What is the recommended power-up sequence for SN74AHCT541IDWREP?
TI recommends tying both OE1 and OE2 to VCC through a pullup resistor (value determined by driver sink capability) to ensure all outputs remain in high-impedance state during power-up. This prevents bus contention before the controlling logic initializes. The SN74AHCT541IDWREP datasheet specifies this as mandatory for safe operation in systems with asynchronous power rails.
Does SN74AHCT541IDWREP support mixed-voltage interfacing?
No. SN74AHCT541IDWREP operates exclusively from a 4.5–5.5 V supply and accepts TTL-level inputs (0.8 V/2.0 V thresholds). It is not designed for 3.3-V or 2.5-V logic families. Interfacing with lower-voltage devices requires external level-shifting circuitry to avoid violating input voltage limits or degrading noise margins.
What is the maximum capacitive load SN74AHCT541IDWREP can drive reliably?
SN74AHCT541IDWREP is characterized up to 50 pF load capacitance, with propagation delays specified at both 15 pF and 50 pF. Driving loads beyond 50 pF may increase delay unpredictably and risk signal integrity issues. For heavier loads, TI recommends adding series termination or using a driver with higher current capability - the SN74AHCT541IDWREP itself is rated for ±25 mA per output.
How does the dual OE architecture of SN74AHCT541IDWREP improve system design?
The dual active-low OE inputs (OE1 and OE2) form an AND gate: outputs go high-Z if either is high. This allows flexible bus arbitration - e.g., one OE can be controlled by a system-level bus grant signal, the other by a local peripheral select. This architecture simplifies glue logic in multi-master systems and is explicitly implemented in the SN74AHCT541IDWREP silicon layout.
Is SN74AHCT541IDWREP RoHS compliant and lead-free?
Yes. SN74AHCT541IDWREP carries a "Green (RoHS & no Sb/Br)" eco-plan designation, with CU NIPDAU lead finish and JEDEC MSL Level-1 rating. It meets RoHS Directive 2011/65/EU requirements, contains no intentionally added bromine or antimony flame retardants, and is compatible with standard lead-free reflow profiles up to 260°C peak.
SN74AHCT541IDWREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74AHCT541IDWREP FAQ
1.How can I place an order for SN74AHCT541IDWREP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT541IDWREP 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 SN74AHCT541IDWREP reliable?
The price and inventory of SN74AHCT541IDWREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT541IDWREP is usually 5 days.
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SN74AHCT541IDWREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT541IDWREP 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 SN74AHCT541IDWREP?
For technical support, including SN74AHCT541IDWREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT541IDWREP requirements.
6.How does Aetrix verify that SN74AHCT541IDWREP is sourced from the original manufacturer or authorized distributors?
All SN74AHCT541IDWREP 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 SN74AHCT541IDWREP meets industry standards.
7.What is the process for return or replacement of SN74AHCT541IDWREP?
All SN74AHCT541IDWREP units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT541IDWREP, 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 SN74AHCT541IDWREP part is unused and in its original packaging.
Return procedure for SN74AHCT541IDWREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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