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Texas Instruments SN74HC541APWLE
- Part No.:
- SN74HC541APWLE
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74HC541APWLE.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
SN74HC541APWLE from Texas Instruments is an octal non-inverting 3-state buffer/line driver in a 20-pin TSSOP package, operating from 2.0 V to 6.0 V supply, delivering ±7.8 mA output drive at 6.0 V, and supporting industrial temperature range (−40 °C to +125 °C). It serves as a bidirectional bus interface or data isolator in microcontroller peripheral expansion, memory address/data buffering, and legacy parallel I/O systems.
For engineers reviewing the SN74HC541APWLE datasheet, SN74HC541APWLE pinout, SN74HC541APWLE application, or SN74HC541APWLE equivalent, key selection criteria include CMOS-level input compatibility, dual active-low output enables (OE1/OE2), 3-state output leakage < ±0.5 µA at 6.0 V, propagation delay of 10 ns (typ) at VCC = 6.0 V, and TSSOP20 thermal performance with 5.5 mW/K derating above 60 °C.
Technical Context
This device implements eight identical non-inverting buffer circuits, each with independent input-to-output signal path and shared 3-state control via two active-low enable inputs (OE1 and OE2). All outputs enter high-impedance state when either OE1 or OE2 is HIGH, enabling flexible bus arbitration and multi-driver contention management.
Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. Static characteristics are specified across −40 °C to +125 °C, with VIH = 4.2 V (min) and VIL = 1.8 V (max) at VCC = 6.0 V, ensuring robust noise margin in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.0 V to 6.0 V - supports mixed-voltage system interfacing and battery-backed operation down to 2.0 V |
| Output Drive | ±7.8 mA at VCC = 6.0 V - sufficient to drive 50-pF loads with <30 ns propagation delay and <15 ns transition time |
| Propagation Delay | 10 ns (typ) at VCC = 6.0 V, CL = 50 pF - enables reliable timing in 33 MHz parallel bus applications |
| 3-State Leakage | ±0.5 µA max at VCC = 6.0 V - minimizes standby current in powered-down bus segments |
| Input Thresholds | VIH = 4.2 V min, VIL = 1.8 V max at VCC = 6.0 V - provides >1.2 V noise margin for CMOS logic families |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive modules and industrial motor controls |
| ESD Protection | HBM >2000 V, MM >200 V - withstands handling and board-level ESD events without latch-up |
Pinout & Package
TSSOP20 package (SOT360-1): plastic thin shrink small outline, 20 leads, body width 4.4 mm, 0.65 mm lead pitch, exposed pad not present, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE1) | Active-low output enable | Asserting HIGH disables all Y0–Y7 outputs simultaneously; enables partial bus isolation when paired with OE2 |
| 2–9 (A0–A7) | Data inputs | CMOS-compatible inputs with clamp diodes; tolerate overvoltage up to VCC + 0.5 V with external current limiting |
| 10 (GND) | Ground reference | 0 V return path for all internal logic and output stages; must be low-impedance for stable 3-state transitions |
| 11–18 (Y0–Y7) | Non-inverting buffered outputs | Drive capability ±7.8 mA; high-impedance state entered within 41 ns (max) of OE assertion at 125 °C |
| 19 (OE2) | Active-low output enable | Independent second enable; OR logic with OE1 - either HIGH forces all outputs to Z-state |
| 20 (VCC) | Positive supply | Primary power rail; decoupling capacitor (100 nF) required within 5 mm for transient noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state enables | OE1 and OE2 provide hierarchical bus control - e.g., OE1 for global disable, OE2 for local subsystem gating |
| Input clamp diodes | Enable safe connection to 5 V or 12 V signals using series resistors, eliminating need for external level shifters |
| Wide supply range | 2.0 V to 6.0 V operation allows direct integration with 3.3 V microcontrollers and 5 V legacy peripherals |
| Industrial temperature rating | −40 °C to +125 °C specification ensures reliability in motor drives, PLC I/O modules, and power supply monitoring |
| Low dynamic power | CPD = 37 pF enables sub-mW switching power at 1 MHz with 50 pF load - critical for thermally constrained PCB layouts |
Applications
| Microcontroller Peripheral Expansion | Memory Address/Data Buffering |
|---|---|
Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU to drive 8-bit parallel LCD, keypad scanner, or sensor array. IC Role / Device Role / Timing Role: Non-inverting buffer isolating MCU pins from capacitive bus loads while enabling/disabling via OE lines synchronized to SPI frame timing. Use Value: Prevents signal degradation on 15 cm traces with 50 pF total load; 10 ns tpd ensures setup/hold compliance at 25 MHz interface clock. |
Use Scenario: Isolating 8-bit address/data bus between FPGA and parallel EEPROM or SRAM in embedded instrumentation. IC Role / Device Role / Timing Role: Bidirectional bus driver with OE-controlled directionality, allowing same pins to serve as address latch or data transceiver. Use Value: ±7.8 mA drive sustains logic levels across 10 cm daisy-chained traces; 3-state leakage <0.5 µA prevents phantom reads during memory idle cycles. |
| Legacy Parallel Printer Interface | Industrial I/O Module Signal Conditioning |
Use Scenario: Level-shifting and buffering Centronics-style parallel port signals from modern SoC to legacy dot-matrix printer. IC Role / Device Role / Timing Role: CMOS-input buffer accepting 3.3 V logic while driving 5 V-tolerant printer inputs via series resistors and internal clamps. Use Value: Input clamp diodes eliminate external protection components; 2.0–6.0 V VCC range matches both SoC I/O and printer logic supply rails. |
Use Scenario: Interfacing isolated analog sensor outputs to PLC backplane via optocoupler-isolated digital bus. IC Role / Device Role / Timing Role: Signal conditioner providing noise-immune 3-state drive between isolated domains, with OE lines controlled by watchdog timer. Use Value: −40 °C to +125 °C rating survives enclosure heating near motor drives; HBM >2000 V withstands field ESD during maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer/line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT541PWLE | TTL-compatible inputs (VIH = 2.0 V min at VCC = 4.5–5.5 V); otherwise identical pinout, timing, and drive | Required when interfacing to 5 V TTL or LSTTL sources without level translation | Select SN74HCT541PWLE only if driving from legacy 5 V TTL logic; SN74HC541APWLE is preferred for pure CMOS or mixed 3.3/5 V systems. |
| 74LCX541MTCX | Lower VCC range (2.0–3.6 V), higher speed (tpd = 5.3 ns typ at 3.3 V), different pinout (SOIC-20 vs TSSOP-20) | Suitable for 3.3 V-only portable systems where space and speed outweigh package compatibility needs | Choose 74LCX541MTCX only for new 3.3 V designs prioritizing speed and low voltage; not drop-in compatible due to differing pin mapping and thermal profile. |
Compared with SN74HC541APWLE, SN74HCT541PWLE offers TTL input thresholds for legacy compatibility but shares identical 3-state behavior and drive strength, while 74LCX541MTCX delivers faster switching at lower voltage yet requires PCB redesign due to SOIC-20 footprint and distinct pin assignments.
Availability
SN74HC541APWLE is available at Aetrix Electronics and suitable for microcontroller peripheral expansion, memory address/data buffering, and industrial I/O module signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74HC541APWLE 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 solutions, with decades of heritage in logic IC design and industrial-grade reliability validation.
The SN74HC541A belongs to TI's 74HC high-speed CMOS logic family, engineered for robust noise immunity, wide supply tolerance, and seamless interoperability with both legacy and modern digital systems in harsh environments.
FAQ
What is the maximum supply voltage rating for SN74HC541APWLE?
The absolute maximum supply voltage for SN74HC541APWLE is +7.0 V, but recommended operation is limited to 2.0 V to 6.0 V per TI's datasheet. Sustained operation above 6.0 V risks parametric shift and reduced lifetime, even if within absolute maximum ratings. Always use 100 nF ceramic decoupling at VCC pin to suppress transients that could momentarily exceed limits.
Does SN74HC541APWLE support true bidirectional data flow?
SN74HC541APWLE is a unidirectional non-inverting buffer: data flows only from A0–A7 inputs to Y0–Y7 outputs. It does not support automatic direction sensing or internal bus turnaround. Bidirectional operation requires external control of OE lines and careful system-level arbitration - for example, using OE1 to enable MCU-to-peripheral writes and OE2 to enable peripheral-to-MCU reads.
Can SN74HC541APWLE interface directly with 5 V logic while powered from 3.3 V?
No - SN74HC541APWLE powered at 3.3 V cannot reliably accept 5 V inputs because its absolute maximum input voltage is VCC + 0.5 V = 3.8 V. Exceeding this risks damage. Use input clamp diodes only with external current-limiting resistors when VCC ≥ 4.5 V; for 3.3 V systems interfacing to 5 V, add discrete clamping or a dedicated level translator like TXB0108.
What is the thermal derating behavior of SN74HC541APWLE in TSSOP20 package?
For SN74HC541APWLE in TSSOP20 (SOT360-1), total power dissipation derates linearly at 5.5 mW/K above +60 °C ambient. At +125 °C, usable Ptot drops to ~150 mW from the 500 mW maximum at +25 °C. Maintain copper pour under the package and limit simultaneous output switching to avoid junction temperatures exceeding 150 °C.
How do OE1 and OE2 interact in SN74HC541APWLE functional operation?
In SN74HC541APWLE, outputs go to high-impedance state if *either* OE1 *or* OE2 is HIGH (active-low logic). Both enables must be LOW for outputs to reflect A0–A7 inputs. This OR logic enables flexible control schemes - e.g., OE1 tied to system reset (global disable), OE2 driven by firmware (peripheral-specific gating).
SN74HC541APWLE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74HC541APWLE FAQ
1.How can I place an order for SN74HC541APWLE through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC541APWLE 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 SN74HC541APWLE reliable?
The price and inventory of SN74HC541APWLE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC541APWLE is usually 5 days.
3.What payment methods are accepted for SN74HC541APWLE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC541APWLE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC541APWLE?
SN74HC541APWLE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC541APWLE 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 SN74HC541APWLE?
For technical support, including SN74HC541APWLE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC541APWLE requirements.
6.How does Aetrix verify that SN74HC541APWLE is sourced from the original manufacturer or authorized distributors?
All SN74HC541APWLE 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 SN74HC541APWLE meets industry standards.
7.What is the process for return or replacement of SN74HC541APWLE?
All SN74HC541APWLE units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC541APWLE, 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 SN74HC541APWLE part is unused and in its original packaging.
Return procedure for SN74HC541APWLE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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