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Texas Instruments SN74HCT541PWRE4
- Part No.:
- SN74HCT541PWRE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74HCT541PWRE4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,777
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Product details
Overview
SN74HCT541PWRE4 from Texas Instruments is an octal buffer and line driver IC with 3-state outputs, designed for bus interface and load-driving applications in 5-V TTL-compatible digital systems. It operates from 4.5 V to 5.5 V, delivers ±6 mA output drive at 5 V, exhibits typical propagation delay of 12 ns, and draws ≤80 µA quiescent supply current.
For engineers reviewing the SN74HCT541PWRE4 datasheet, SN74HCT541PWRE4 pinout, SN74HCT541PWRE4 application, or SN74HCT541PWRE4 equivalent, this page provides verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for industrial control, data acquisition, and legacy bus interfacing designs.
Technical Context
This device implements eight independent non-inverting buffers, each with true (non-inverted) output logic and dual 3-state enable inputs (OE1, OE2) wired as a 2-input NOR gate - asserting either OE high places all Y outputs in high-impedance state. Its input structure is TTL-voltage compatible, accepting VIH ≥ 2.0 V and VIL ≤ 0.8 V over the full 4.5–5.5 V supply range.
The SN74HCT541PWRE4 uses HCT logic family architecture, ensuring CMOS power efficiency while maintaining TTL input thresholds and output drive strength. Its data flow-through pinout - inputs on one side, outputs on the opposite side - reduces PCB trace crosstalk and simplifies routing in dense bus architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and mixed-signal systems without level translation. |
| Output Drive | ±6 mA at 5 V - sufficient to directly drive up to 15 LSTTL loads or interface with standard system buses. |
| Propagation Delay | 12 ns typical (VCC = 5.5 V, CL = 50 pF) - supports reliable operation in 30+ MHz digital control and data paths. |
| Quiescent ICC | ≤80 µA max - enables low-power standby modes in battery-backed or energy-sensitive embedded controllers. |
| Input Compatibility | TTL-voltage compatible (VIH ≥ 2.0 V, VIL ≤ 0.8 V) - eliminates need for external level shifters when interfacing with legacy 5-V logic. |
| 3-State Enable Logic | NOR-gated OE1/OE2 - single-pin disable capability simplifies bus arbitration and multi-driver contention management. |
Pinout & Package
SN74HCT541PWRE4 is packaged in a 20-pin SOIC (DW) body measuring 12.80 mm × 7.50 mm, with standard 1.27-mm lead pitch and gull-wing leads. The package is RoHS-compliant, moisture sensitivity level 1, and rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Buffer Inputs (A1–A8) | True logic inputs driving corresponding Y outputs; accept TTL-compatible voltage levels. |
| 9, 19 | 3-State Enable Inputs (OE1, OE2) | NOR-gated control: either high forces all Y outputs into high-Z state for bus sharing. |
| 10, 11, 13, 14, 15, 16, 17, 18 | Buffer Outputs (Y1–Y8) | Non-inverting, 3-state outputs capable of ±6 mA drive; high-Z when OE1 or OE2 = high. |
| 12 | GND | Ground reference for logic and power; must be low-impedance connection for noise immunity. |
| 20 | VCC | Positive supply rail (4.5–5.5 V); requires local 0.1-µF bypass capacitor per TI layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Data flow-through pinout | Inputs (A1–A8, OE1, OE2) on left side, outputs (Y1–Y8) on right side - minimizes layer transitions and signal coupling on 2-layer PCBs. |
| High-current 3-state outputs | ±6 mA drive strength at 5 V - eliminates need for external bus transceivers in moderate-load applications. |
| Low input current | ≤1 µA max - reduces loading on upstream drivers and preserves fan-out margin in cascaded logic stages. |
| Low power consumption | 80 µA max ICC - supports extended idle periods in programmable logic controllers and sensor interface modules. |
| TTL-compatible inputs | VIH ≥ 2.0 V, VIL ≤ 0.8 V - interoperates seamlessly with legacy 5-V microcontrollers, FPGAs, and discrete logic without level-shifting circuitry. |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Module |
|---|---|
Use Scenario: Expanding digital I/O capacity in programmable logic controllers using parallel backplane buses. IC Role / Device Role / Timing Role: Bidirectional buffer isolating CPU address/data lines from field-side peripheral modules during hot-swap events. Use Value: Enables clean bus arbitration via OE-controlled high-Z state, preventing contention during module insertion/removal. | Use Scenario: Interfacing modern microcontroller units to legacy ISA or PC/104 peripheral cards requiring 5-V TTL signaling. IC Role / Device Role / Timing Role: Level-consistent octal driver translating MCU GPIO states to full-strength bus-compatible signals. Use Value: Delivers ±6 mA drive and 12 ns tpd to meet strict setup/hold timing of vintage bus protocols without added components. |
| Test Equipment Signal Conditioning | Digital Sensor Aggregation Node |
Use Scenario: Driving multiple DUT (device-under-test) inputs simultaneously from a single pattern generator channel. IC Role / Device Role / Timing Role: Fan-out buffer distributing synchronized test vectors across 8 parallel channels with matched propagation delay. Use Value: Data flow-through pinout and 12 ns tpd ensure sub-nanosecond skew between outputs, critical for timing-critical validation. | Use Scenario: Consolidating digital outputs from 8 discrete sensors (e.g., limit switches, proximity detectors) into a shared microcontroller input bus. IC Role / Device Role / Timing Role: Input buffer aggregating open-collector/drain sensor signals onto a common 5-V logic rail with noise filtering. Use Value: TTL-compatible inputs accept direct connection to mechanical or opto-isolated sensor outputs; low ICC extends battery life in remote nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer and line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT240N | Inverting outputs; dual 4-bit configuration with separate OE controls per group. | Suitable where signal polarity inversion is acceptable or required for bus termination schemes. | Select SN74HCT240N only if inverted logic is functionally needed; otherwise SN74HCT541PWRE4 provides true output mapping. |
| 74ACT541PC | ACT family: higher speed (tpd ≈ 8 ns), wider VCC range (4.5–5.5 V), but higher ICC (≈2 mA). | Better for high-frequency clock distribution; less suitable for ultra-low-power standby modes. | Choose 74ACT541PC when propagation delay <10 ns is mandatory; SN74HCT541PWRE4 preferred for ICC <100 µA constraints. |
Compared with SN74HCT240N and 74ACT541PC, the SN74HCT541PWRE4 uniquely balances TTL compatibility, low quiescent current, and true-output functionality in a single 20-pin SOIC package - making it optimal for cost-sensitive, power-aware industrial interfaces where signal integrity and pinout simplicity are prioritized.
Availability
SN74HCT541PWRE4 is available at Aetrix Electronics and suitable for industrial PLC expansion, legacy bus interface modules, and digital sensor aggregation nodes requiring stable component supply and long-term production continuity.
Supply support for SN74HCT541PWRE4 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 for industrial, automotive, and communications markets.
The SN74HCT541PWRE4 belongs to TI's HCT logic family, engineered for seamless integration into 5-V TTL-based systems where low power, bus-friendly 3-state control, and robust noise immunity are essential design requirements.
FAQ
What is the operating voltage range for SN74HCT541PWRE4?
The SN74HCT541PWRE4 operates from 4.5 V to 5.5 V. This range ensures compatibility with standard 5-V TTL logic families and allows margin for supply ripple or regulation tolerance. Operation outside this range may cause functional failure or permanent damage, as specified in the absolute maximum ratings table of the official datasheet.
Does SN74HCT541PWRE4 support true or inverted output logic?
SN74HCT541PWRE4 provides true (non-inverting) output logic: each Y output replicates its corresponding A input when enabled. This differs from inverting octal buffers like the SN74HCT240. The truth table confirms Y = A when OE1 = OE2 = low, making SN74HCT541PWRE4 ideal for direct signal pass-through applications without polarity reversal.
How does the 3-state enable logic work on SN74HCT541PWRE4?
The SN74HCT541PWRE4 uses a 2-input NOR gate for 3-state control: if either OE1 or OE2 is high, all eight Y outputs enter high-impedance state. Both OE inputs must be low to enable normal buffering. This architecture allows flexible bus control - for example, OE1 can serve as global enable while OE2 acts as fault-safe shutdown - without external logic.
What is the maximum capacitive load SN74HCT541PWRE4 can drive reliably?
SN74HCT541PWRE4 switching characteristics are characterized at CL = 50 pF and CL = 150 pF. At 5.5 V supply, tpd remains within specification (≤31 ns) up to 150 pF. For heavier loads, output rise/fall times increase linearly; TI recommends limiting total trace + load capacitance to ≤150 pF for guaranteed timing compliance in high-speed designs using SN74HCT541PWRE4.
Is SN74HCT541PWRE4 RoHS compliant and what is its moisture sensitivity level?
Yes, SN74HCT541PWRE4 is RoHS compliant and has a moisture sensitivity level (MSL) rating of Level-1 at 260°C peak reflow. This means it can be stored indefinitely at ≤30°C/60% RH without baking prior to assembly, simplifying manufacturing logistics. The "E4" suffix denotes TI's green packaging standard, confirming lead-free terminations and halogen-free molding compound per SN74HCT541PWRE4 specifications.
SN74HCT541PWRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74HCT541PWRE4 FAQ
1.How can I place an order for SN74HCT541PWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HCT541PWRE4 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 SN74HCT541PWRE4 reliable?
The price and inventory of SN74HCT541PWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HCT541PWRE4 is usually 5 days.
3.What payment methods are accepted for SN74HCT541PWRE4?
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4.How is shipping managed for SN74HCT541PWRE4?
SN74HCT541PWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HCT541PWRE4 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 SN74HCT541PWRE4?
For technical support, including SN74HCT541PWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HCT541PWRE4 requirements.
6.How does Aetrix verify that SN74HCT541PWRE4 is sourced from the original manufacturer or authorized distributors?
All SN74HCT541PWRE4 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 SN74HCT541PWRE4 meets industry standards.
7.What is the process for return or replacement of SN74HCT541PWRE4?
All SN74HCT541PWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HCT541PWRE4, 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 SN74HCT541PWRE4 part is unused and in its original packaging.
Return procedure for SN74HCT541PWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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