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NXP Semiconductors N74F541D,623
- Part No.:
- N74F541D,623
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
N74F541D,623.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,157
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Product details
Overview
N74F541D,623 from Philips Semiconductors is an octal non-inverting 3-state buffer IC designed for bus interface and memory address register buffering in TTL-compatible digital systems. It features 8 bidirectional data channels, 3-state outputs capable of sinking 64mA and sourcing 15mA, propagation delay of 5.5ns (typical), and operates over 0°C to +70°C with 5V ±10% supply.
For engineers reviewing the N74F541D,623 datasheet, N74F541D,623 pinout, N74F541D,623 application, or N74F541D,623 equivalent, key selection criteria include output drive strength (64mA sink / 15mA source), dual active-low 3-state enable inputs (OE0, OE1), SO20 package compatibility, and direct functional alignment with legacy 74F241-based bus architectures.
Technical Context
The N74F541D,623 implements a non-inverting octal buffer architecture with two independent active-low 3-state enable controls (OE0 and OE1), allowing simultaneous or selective gating of all eight outputs. Its logic function follows a simple Yn = In when either OE0 or OE1 is low; otherwise, outputs enter high-impedance state.
Designed for TTL-level interfacing, it uses NPN-base input structures limiting input current to ±20µA in both logic states, enabling light bus loading. Output stages are optimized for capacitive drive (50pF load) and fast switching, with disable times ≤7.0ns and enable times ≤9.5ns across temperature and voltage ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Octal non-inverting buffer with dual active-low 3-state enables (OE0, OE1) |
| Propagation Delay | 5.5ns typical (In to Yn, VCC = 5V, CL = 50pF), ensuring sub-6ns timing in high-speed bus cycles |
| Output Drive | Sinks 64mA / sources 15mA - sufficient to drive multiple TTL loads or moderate PCB trace capacitance |
| Supply Current | 55mA typical total ICC (74F541), enabling stable operation under full bus loading without excessive power dissipation |
| Operating Range | 0°C to +70°C ambient, 4.5V–5.5V VCC - suitable for commercial-grade embedded control and computing applications |
| Input Loading | 1.0 FAST Unit Load (20µA HI/LO), minimizing fan-out burden on upstream drivers |
Pinout & Package
Package: SO20 - plastic small outline, 20-lead, 7.5 mm body width (SOT163-1), surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19–20 | VCC, GND, OE1 | VCC (Pin 20) and GND (Pin 10) supply rails; OE1 (Pin 19) is active-low global 3-state enable for all outputs |
| 2–9, 11–18 | I0–I7, Y0–Y7 | Data inputs (I0–I7, Pins 2,3,4,5,6,7,8,9) and non-inverted outputs (Y0–Y7, Pins 11,12,13,14,15,16,17,18) |
| 10 | GND | Ground reference (Pin 10), shared return path for all I/O and supply currents |
| 19 | OE1 | Active-low enable controlling all eight outputs - assertion forces Y0–Y7 into high-impedance state |
| 1 | OE0 | Second active-low enable (Pin 1); OR'd with OE1 - either low enables outputs |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3-state enable inputs | OE0 (Pin 1) and OE1 (Pin 19) provide redundant or split-bus control without external logic |
| High-current 3-state outputs | 64mA sink capability supports direct connection to terminated buses or multiple TTL inputs |
| Low-input-current NPN-base inputs | ±20µA loading per input preserves drive margin in fan-out-critical designs |
| Optimized pinout layout | Inputs and outputs placed on opposite sides of SO20 package to simplify PCB routing and reduce crosstalk |
Applications
| Microprocessor Address Bus Buffering | Memory Module Data Interface |
|---|---|
Use Scenario: Isolating and driving 8-bit address lines from a microprocessor to multiple memory chips on a shared bus. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state control synchronizing address latching during memory access cycles. Use Value: 5.5ns propagation delay ensures setup/hold timing compliance; 64mA sink drives parallel address decode logic without signal degradation. | Use Scenario: Interfacing between a controller and SRAM/ROM modules requiring bidirectional data isolation during read/write transitions. IC Role / Device Role / Timing Role: Direction-transparent 3-state buffer enabling clean data bus sharing between master and memory devices. Use Value: Dual OE inputs allow precise timing control of bus release, preventing contention; low input current avoids loading controller outputs. |
| Industrial PLC I/O Expansion | Legacy System Bus Repeater |
Use Scenario: Extending TTL-level digital I/O capacity in programmable logic controllers using modular backplane architecture. IC Role / Device Role / Timing Role: Octal buffer providing noise-immune signal regeneration and level-shifting between isolated I/O modules. Use Value: SO20 package enables compact module design; 0°C to +70°C rating matches industrial ambient requirements. | Use Scenario: Repeating and strengthening signals across long backplane traces in vintage computer or instrumentation systems. IC Role / Device Role / Timing Role: Signal integrity repeater restoring edge rate and drive strength degraded by trace capacitance and termination loss. Use Value: 50pF AC load support and sub-7ns disable time maintain signal fidelity across multi-segment buses. |
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 |
|---|---|---|---|
| SN74F241N | Identical logic function and pinout; same SO20/DIP20 packaging options; identical 64mA/15mA drive specs | No functional difference - drop-in replacement in all 74F241-designated layouts | Select SN74F241N when sourcing from TI-authorized channels or where dual-sourcing across Philips/TI is required |
| 74ACT241PC | Higher speed (3.5ns typ), 5V CMOS logic family, lower ICC (20mA typ), but requires stricter VIH/VIL thresholds (3.5V/1.5V) | Not directly interchangeable due to input voltage sensitivity and different noise margin; requires redesign of upstream driver levels | Choose 74ACT241PC only when upgrading system timing budget and verifying full CMOS-level compatibility across the signal chain |
Compared with SN74F241N and 74ACT241PC, the N74F541D,623 delivers proven TTL-compatible drive and timing within legacy 74F ecosystems, while avoiding CMOS-level input threshold risks and maintaining full pin-and-function equivalence with industry-standard 74F241 implementations.
Availability
N74F541D,623 is available at Aetrix Electronics and suitable for microprocessor address buffering, memory module interfacing, and industrial PLC I/O expansion requiring stable component supply and long-term obsolescence management.
Supply support for N74F541D,623 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
Philips Semiconductors (now NXP Semiconductors) was a leading European semiconductor manufacturer known for broad logic, analog, and automotive IC portfolios before its semiconductor division became NXP in 2006.
The 74F logic family - including N74F541D,623 - was engineered for high-speed TTL-compatible digital systems requiring robust noise immunity, predictable timing, and interoperability with 74LS/74AS families in computing and industrial control.
FAQ
What is the logic function of the N74F541D,623?
The N74F541D,623 is an octal non-inverting 3-state buffer. Each of its eight outputs Y0–Y7 replicates the corresponding input I0–I7 when either OE0 (Pin 1) or OE1 (Pin 19) is low; otherwise, all outputs enter high-impedance state. This behavior is confirmed in the function table of the Philips 1990 datasheet and matches the 74F241 standard.
Does the N74F541D,623 support 3.3V operation?
No, the N74F541D,623 is specified only for 4.5V–5.5V VCC operation per its Recommended Operating Conditions. It lacks 3.3V-rated input thresholds or output drive characteristics, and applying 3.3V supply violates its minimum VCC requirement. Use of N74F541D,623 outside 5V ±10% risks undefined logic states and reduced noise margins.
What is the maximum output sink current for the N74F541D,623?
The N74F541D,623 supports up to 64mA sink current per output (IOL = 64mA, tested at VCC = 4.5V, VOL ≤ 0.55V), as specified in the DC Electrical Characteristics table. This value is validated across the full 0°C to +70°C operating range and enables direct driving of multiple TTL inputs or moderate capacitive loads.
Is the N74F541D,623 pin-compatible with the 74F540?
Yes - the N74F541D,623 shares identical pin configuration with the 74F540 (inverter buffer), including VCC (Pin 20), GND (Pin 10), OE0 (Pin 1), OE1 (Pin 19), and I/Y mapping. However, internal logic differs: N74F541D,623 provides non-inverting outputs, while 74F540 inverts. Swapping them requires logic inversion elsewhere in the circuit.
What package type does N74F541D,623 use?
The N74F541D,623 uses the SO20 plastic small outline package (SOT163-1), measuring 7.5 mm body width with 20 gull-wing leads. This surface-mount variant replaces the through-hole DIP20 (SOT146-1) version denoted by part numbers ending in "N", and is documented in Philips' 1990 product specification on page 9.
N74F541D,623 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74F
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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:
- 15mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
N74F541D,623 FAQ
1.How can I place an order for N74F541D,623 through Aetrix?
Please submit a Request for Quotation (RFQ) for N74F541D,623 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 N74F541D,623 reliable?
The price and inventory of N74F541D,623 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for N74F541D,623 is usually 5 days.
3.What payment methods are accepted for N74F541D,623?
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4.How is shipping managed for N74F541D,623?
N74F541D,623 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your N74F541D,623 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 N74F541D,623?
For technical support, including N74F541D,623 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your N74F541D,623 requirements.
6.How does Aetrix verify that N74F541D,623 is sourced from the original manufacturer or authorized distributors?
All N74F541D,623 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 N74F541D,623 meets industry standards.
7.What is the process for return or replacement of N74F541D,623?
All N74F541D,623 units undergo pre-shipment inspection (PSI). If there is an issue with N74F541D,623, 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 N74F541D,623 part is unused and in its original packaging.
Return procedure for N74F541D,623:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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