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NXP Semiconductors 74HC541DB,118
- Part No.:
- 74HC541DB,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HC541DB,118.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,979
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Product details
Overview
74HC541DB,118 from Nexperia is an octal non-inverting 3-state buffer/line driver in SO20 (SOT163-1) package, operating from 2.0 V to 6.0 V supply, featuring dual active-low output enables (OE1, OE2), CMOS-level inputs, and ±35 mA output drive capability. It serves as a bidirectional bus interface or signal isolation element in digital logic systems requiring controlled data routing and load driving.
For engineers reviewing the 74HC541DB,118 datasheet, 74HC541DB,118 pinout, 74HC541DB,118 application, or 74HC541DB,118 equivalent, key selection criteria include propagation delay (10–35 ns at VCC = 4.5–6.0 V), 3-state enable/disable timing (16–48 ns), input voltage thresholds (VIH = 1.5 V min at VCC = 2.0 V), output drive strength, and SO20 thermal derating (12.3 mW/K above 109 °C).
Technical Context
This device implements eight identical non-inverting buffer circuits with independent 3-state control via two active-low enables. Each output enters high-impedance state when either OE1 or OE2 is HIGH, enabling flexible bus arbitration across multiple drivers on shared lines.
Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. The design complies with JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V), supports operation from –40 °C to +125 °C, and delivers latch-up immunity >100 mA per JESD78 Class II Level B.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.0 V to 6.0 V - Enables direct compatibility with 3.3 V and 5 V logic domains without level translation. |
| Propagation Delay | 10 ns (typ) at VCC = 6.0 V - Supports high-speed data transfer up to ~50 MHz system clock edge rates. |
| Output Drive | ±35 mA - Sufficient to drive standard TTL loads or multiple CMOS inputs without external buffering. |
| Enable Timing | ten = 16 ns (max), tdis = 41 ns (max) at VCC = 6.0 V - Ensures clean bus turn-on/turn-off with minimal contention window. |
| Input Thresholds | VIH = 4.2 V (min), VIL = 1.8 V (max) at VCC = 6.0 V - Provides robust noise margin (>1.2 V) in noisy industrial environments. |
| Operating Temp | –40 °C to +125 °C - Qualified for extended industrial and under-hood automotive auxiliary applications. |
| Power Dissipation | Ptot = 500 mW (SO20), derates 12.3 mW/K above 109 °C - Defines maximum continuous power handling under thermal constraints. |
Pinout & Package
74HC541DB,118 is housed in a plastic small outline package (SO20), SOT163-1, with 20 leads and 7.5 mm body width. Pin 1 is marked by a notch or dot; pin numbering follows standard counter-clockwise convention starting from the top-left corner when viewed from the top with marking side up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low output enable inputs - Either HIGH forces all eight outputs into high-impedance state; both LOW enables normal non-inverting buffering. |
| 2–9 | A0–A7 | Data inputs - Accept CMOS-level signals; internal clamp diodes permit overvoltage-safe interfacing with series current-limiting resistors. |
| 10 | GND | Ground reference - Must be connected to system 0 V plane; decoupling capacitor recommended near pin. |
| 11–18 | Y0–Y7 | Non-inverting buffered outputs - Provide rail-to-rail swing and ±35 mA sink/source capability; high-Z state isolates downstream loads. |
| 20 | VCC | Positive supply - Requires local 100 nF ceramic decoupling to GND; voltage must remain within 2.0–6.0 V during operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state enables | OE1 and OE2 allow hierarchical bus control - e.g., OE1 for subsystem-level disable, OE2 for local module override. |
| Wide supply range | 2.0 V to 6.0 V operation eliminates need for separate voltage rails in mixed-supply systems. |
| High noise immunity | CMOS input structure with >40 % VCC noise margin ensures reliable operation in electrically noisy industrial cabinets. |
| Input clamp diodes | Enable safe connection to signals up to VCC + 0.5 V using external current-limiting resistors - avoids damage from transient overvoltage. |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - prevents destructive parasitic thyristor activation during ESD or surge events. |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Adapter |
|---|---|
Use Scenario: Expanding discrete I/O points on a programmable logic controller rack using parallel backplane wiring. IC Role / Device Role / Timing Role: Non-inverting buffer isolating CPU-side control signals from field-side relay/sensor loads while enabling/disabling groups via OE1/OE2. Use Value: Prevents bus contention during hot-swap of I/O modules and supports 125 °C ambient operation in enclosed control cabinets. | Use Scenario: Bridging 5 V TTL-based legacy instrumentation buses (e.g., GPIB auxiliary lines) to modern 3.3 V microcontroller peripherals. IC Role / Device Role / Timing Role: Level-shifting line driver with 3-state control synchronized to handshake signals (e.g., NRFD, NDAC) to avoid signal collisions. Use Value: Eliminates need for discrete MOSFET translators; ±35 mA drive directly sources TTL fan-out requirements without pull-ups. |
| Memory Address Latching | LED Segment Driver Interface |
Use Scenario: Driving address lines to multiple SRAM or EPROM devices sharing a common data/address bus in embedded controllers. IC Role / Device Role / Timing Role: Octal buffer providing low-capacitance, high-drive address distribution with OE-controlled deactivation during memory read/write cycles. Use Value: Reduces address skew across devices; propagation delay <35 ns ensures setup/hold compliance with 25 MHz bus timing. | Use Scenario: Controlling common-anode 7-segment LED displays from a microcontroller GPIO port with multiplexed digit scanning. IC Role / Device Role / Timing Role: Current-sinking driver for segment lines, enabled per-digit via OE1/OE2 to sequence display refresh without ghosting. Use Value: Delivers 20 mA per segment at VCC = 5 V - sufficient for high-brightness LEDs; 3-state isolation prevents cross-talk between digits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal non-inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT541DB,118 | TTL-compatible inputs (VIH = 2.0 V min at VCC = 4.5 V); otherwise identical pinout, timing, and drive. | Required when interfacing with legacy 5 V TTL logic families where HC-level VIH would cause marginal recognition. | Select when driving from 5 V TTL outputs; retains same SO20 footprint and thermal profile. |
| SN74LVC244APWR | 3.3 V only (1.65–3.6 V), lower propagation delay (5.5 ns typ), higher speed but incompatible supply range. | Suitable only in pure 3.3 V systems; lacks 5 V tolerance and industrial temperature grade. | Choose for high-speed 3.3 V FPGA/CPU interfaces where 2.0–6.0 V flexibility is unnecessary. |
Compared with 74HC541DB,118, the 74HCT541DB,118 offers guaranteed TTL input compatibility at 5 V while maintaining identical output behavior and thermal specs; SN74LVC244APWR trades supply flexibility for sub-6 ns speed in 3.3 V domains, limiting use to newer low-voltage designs.
Availability
74HC541DB,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy bus interface adapters, memory address latching, and LED segment driver interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HC541DB,118 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
Nexperia is a global semiconductor expert specializing in high-volume, high-reliability logic, analog, and discrete components, with manufacturing rooted in process optimization and automotive-grade quality standards.
The 74HC541 belongs to Nexperia's HC-series logic family, designed for robust, low-power digital interfacing in industrial, computing, and communication equipment where wide supply range and noise immunity are critical.
FAQ
What is the maximum clock frequency supported by 74HC541DB,118?
The 74HC541DB,118 does not operate on a clock; it is an asynchronous buffer. Its usable data rate depends on propagation delay (10–35 ns) and system timing margins. For clean signal integrity with 50 pF load, maximum toggle rate is ~14 MHz (based on 2×tpd), though practical bus speeds in real designs typically reach 25 MHz with proper layout and termination.
Can 74HC541DB,118 drive a 50 Ω transmission line directly?
No - its ±35 mA output drive is insufficient for direct 50 Ω line driving at full logic swing. It can drive unterminated lines up to ~10 cm or capacitive loads ≤50 pF. For 50 Ω impedance matching, use a dedicated line driver IC or add series termination (e.g., 33 Ω resistor) at the source with appropriate slew control.
Is 74HC541DB,118 pin-compatible with 74LS541?
Yes - 74HC541DB,118 shares identical SO20 pinout and functional mapping with 74LS541, including OE1/OE2, A0–A7, Y0–Y7, VCC, and GND positions. However, electrical behavior differs: HC uses CMOS inputs (VIH ≈ 0.7×VCC), LS uses bipolar TTL inputs (VIH = 2.0 V), so direct substitution requires verifying input voltage compatibility.
Does 74HC541DB,118 require external pull-up or pull-down resistors on OE pins?
No - OE1 and OE2 have no internal pull resistors and must be actively driven. Leaving them floating risks undefined output states. In most designs, OE pins are connected to MCU GPIOs or decoded logic signals; if permanently enabled, tie OE1 and OE2 to GND via 0 Ω resistors or direct connection - never leave unconnected.
74HC541DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HC
- Package/Case:
- 20-SSOP (0.209", 5.30mm 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
74HC541DB,118 FAQ
1.How can I place an order for 74HC541DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC541DB,118 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 74HC541DB,118 reliable?
The price and inventory of 74HC541DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC541DB,118 is usually 5 days.
3.What payment methods are accepted for 74HC541DB,118?
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4.How is shipping managed for 74HC541DB,118?
74HC541DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC541DB,118 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 74HC541DB,118?
For technical support, including 74HC541DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC541DB,118 requirements.
6.How does Aetrix verify that 74HC541DB,118 is sourced from the original manufacturer or authorized distributors?
All 74HC541DB,118 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 74HC541DB,118 meets industry standards.
7.What is the process for return or replacement of 74HC541DB,118?
All 74HC541DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC541DB,118, 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 74HC541DB,118 part is unused and in its original packaging.
Return procedure for 74HC541DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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