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NXP Semiconductors N74F541N,602
- Part No.:
- N74F541N,602
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
N74F541N,602.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,034
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Product details
Overview
N74F541N,602 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 data inputs (I0–I7), dual active-low 3-state enable inputs (OE0, OE1), 8 non-inverting outputs (Y0–Y7), 5.5 ns typical propagation delay, ±15 mA high-level / 64 mA low-level output drive, and operates at 4.5–5.5 V over 0°C to +70°C.
For engineers reviewing the N74F541N,602 datasheet, N74F541N,602 pinout, N74F541N,602 application, or N74F541N,602 equivalent, key selection criteria include 3-state bus driving capability, TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V), output current ratings (IOH = –15 mA, IOL = 64 mA), and DIP-20 package compatibility with legacy board layouts.
Technical Context
The N74F541N,602 implements a standard TTL-compatible octal buffer architecture with dual independent 3-state enables controlling all eight outputs simultaneously. Its logic function is purely combinational: each Yn follows In when either OE0 or OE1 is low; otherwise, all outputs enter high-impedance state.
It uses bipolar F-type (fast TTL) process technology, delivering low propagation delay (5.5 ns typ.) and high capacitive drive (64 mA sink) while maintaining compatible input loading (20 µA max. IIH/IIL). The pinout places inputs and outputs on opposite sides of the 20-pin DIP package to minimize trace crosstalk in bus routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Octal non-inverting buffer with dual active-low 3-state enable (OE0, OE1) |
| Propagation Delay | 5.5 ns typical (In to Yn, VCC = 5 V, CL = 50 pF), enabling sub-10 ns bus cycle timing |
| Output Drive | Sinks 64 mA / sources 15 mA - sufficient to drive 10+ TTL loads or 50 Ω transmission lines |
| Supply Range | 4.5 V to 5.5 V - compatible with standard 5 V ±10% commercial power rails |
| Operating Temp | 0°C to +70°C - rated for commercial-grade embedded and industrial control environments |
| Input Loading | 20 µA max. IIH/IIL - minimal loading on upstream TTL or CMOS drivers |
| 3-State Leakage | ±50 µA IOZL/IOZH - ensures clean bus isolation during disable |
Pinout & Package
Package: 20-pin plastic dual in-line package (DIP), SOT146-1, 300 mil width, through-hole mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19–20 | VCC | Positive supply (pin 20); decoupling capacitor placement critical for noise immunity |
| 10 | GND | Signal and power reference plane; must be low-inductance connection |
| 2–9, 11–18 | I0–I7, OE0, OE1, Y0–Y7 | Data inputs (I0–I7), dual 3-state enables (OE0/OE1), non-inverting outputs (Y0–Y7) |
| OE0, OE1 | Enable control | Active-low; either low enables all outputs - supports redundant or split-bus enable schemes |
| Y0–Y7 | Buffered outputs | 3-state capable; high-impedance when both enables high - prevents bus contention |
Key Features
| Feature | Design Value |
|---|---|
| Octal non-inverting buffer with dual 3-state enables | Enables flexible bus arbitration using either OE0 or OE1 independently or in wired-OR configuration |
| 64 mA output sink capability | Drives heavy capacitive loads (e.g., >100 pF buses) without signal degradation or timing skew |
| 5.5 ns typical propagation delay | Supports >100 MHz bus toggle rates in short-trace configurations with proper termination |
| 20 µA input current (IIH/IIL) | Reduces loading on preceding logic stages - preserves fan-out margin in cascaded TTL designs |
| Opposite-side I/O pin arrangement | Minimizes parallel trace coupling on PCB; simplifies 8-bit bus routing with orthogonal layer transitions |
Applications
| Microprocessor Address Bus Buffering | Shared Data Bus Interface |
|---|---|
Use Scenario: Buffering 8-bit address lines from a Z80 or 8085 CPU to multiple peripheral decoders. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer isolating CPU address outputs from decoder inputs; enables time-multiplexed address access. Use Value: Prevents address line loading-induced timing violations and ensures clean setup/hold margins across multiple downstream devices. | Use Scenario: Bidirectional data bus arbitration between two microcontrollers sharing a common SRAM bank. IC Role / Device Role / Timing Role: Unidirectional 3-state driver enabling one controller's data path while isolating the other's outputs. Use Value: Eliminates bus contention risk during handshaking; supports deterministic read/write sequencing without external arbitration logic. |
| Legacy Memory Module Expansion | TTL-Level Logic Level Translation |
Use Scenario: Driving 8-bit data lines from a 27C256 EPROM to a 62256 SRAM in a retro-computing expansion card. IC Role / Device Role / Timing Role: Output buffer ensuring EPROM data meets SRAM input voltage and timing requirements under load. Use Value: Compensates for EPROM's weak drive strength and guarantees valid VOL/VOH levels across full temperature range. | Use Scenario: Interfacing 3.3 V FPGA I/O (with 5 V-tolerant inputs) to legacy 5 V TTL peripherals. IC Role / Device Role / Timing Role: Level-shifting buffer translating 3.3 V logic highs to robust 5 V TTL-compatible outputs. Use Value: Provides guaranteed VIH ≥ 2.0 V and VIL ≤ 0.8 V at 5 V supply - eliminates marginal switching in mixed-voltage systems. |
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 pinout and logic function; same 5.5 ns tPLH/tPHL, but higher ICCZ (60 mA vs. 55 mA) | Same bus buffering use cases; slightly higher quiescent current in 3-state mode | Select SN74F241N only if existing design already uses TI's footprint and sourcing favors TI distribution channels |
| 74ACT244PC | CMOS Advanced ACT family; 3.3 V–5.5 V supply, lower ICC (2 µA), but slower tPLH (8.5 ns typ.) and lower IOL (24 mA) | Better for low-power or mixed-voltage systems; insufficient drive for heavy TTL bus loads | Choose 74ACT244PC when power efficiency or 3.3 V compatibility is prioritized over raw drive strength and speed |
Compared with SN74F241N and 74ACT244PC, the N74F541N,602 delivers optimal balance of speed (5.5 ns), drive (64 mA), and legacy 5 V TTL compatibility - making it the preferred choice for retrofitting or maintaining vintage digital systems requiring proven bus loading performance.
Availability
N74F541N,602 is available at Aetrix Electronics and suitable for microprocessor address buffering, shared data bus interfacing, legacy memory expansion, and TTL-level logic translation requiring stable component supply and long-term obsolescence management.
Supply support for N74F541N,602 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 high-reliability logic, analog, and RF products from the 1970s through early 2000s.
The 74F logic family - including the N74F541N,602 - was engineered for high-speed, low-power TTL-compatible digital systems in industrial control, test equipment, and computer peripherals during the 1980s–1990s.
FAQ
What is the logic function of the N74F541N,602?
The N74F541N,602 is an octal non-inverting 3-state buffer. Each output Yn follows its corresponding input In when either OE0 or OE1 is low; when both enables are high, all outputs enter high-impedance state. This behavior is confirmed in the FUNCTION TABLE on page 4 of the Philips 74F540/541 datasheet, and applies identically to the N74F541N,602 variant.
Does the N74F541N,602 support 3.3 V operation?
No, the N74F541N,602 is specified only for 4.5 V to 5.5 V supply operation per the RECOMMENDED OPERATING CONDITIONS table (page 5). It is not 3.3 V compatible - applying 3.3 V violates minimum VCC and will result in undefined logic levels and degraded output drive. For 3.3 V systems, consider alternatives like 74ACT244, not the N74F541N,602.
What is the maximum output current rating for the N74F541N,602?
The N74F541N,602 provides –15 mA high-level output current (IOH) and 64 mA low-level output current (IOL), as specified in the RECOMMENDED OPERATING CONDITIONS table (page 5) and confirmed in the DC ELECTRICAL CHARACTERISTICS (page 5). These values define its ability to drive TTL loads and terminate transmission lines without exceeding safe operating limits.
Is the N74F541N,602 pin-compatible with the 74F540?
Yes, the N74F541N,602 shares identical pinout and package (DIP-20, SOT146-1) with the 74F540, as shown in the PIN CONFIGURATION diagrams (pages 2–3). However, their logic functions differ: N74F541N,602 is non-inverting, while 74F540 is inverting. Swapping them requires logic inversion in the system design.
What is the typical propagation delay of the N74F541N,602?
The typical propagation delay (tPLH/tPHL) of the N74F541N,602 is 5.5 ns, measured from input to output under standard conditions (VCC = 5.0 V, Tamb = +25°C, CL = 50 pF, RL = 500 Ω), as listed in the AC ELECTRICAL CHARACTERISTICS table (page 6). This value is specific to the 74F541 variant and differs from the 74F540's 3.5 ns rating.
N74F541N,602 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74F
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- 20-DIP
N74F541N,602 FAQ
1.How can I place an order for N74F541N,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for N74F541N,602 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 N74F541N,602 reliable?
The price and inventory of N74F541N,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for N74F541N,602 is usually 5 days.
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N74F541N,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your N74F541N,602 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 N74F541N,602?
For technical support, including N74F541N,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your N74F541N,602 requirements.
6.How does Aetrix verify that N74F541N,602 is sourced from the original manufacturer or authorized distributors?
All N74F541N,602 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 N74F541N,602 meets industry standards.
7.What is the process for return or replacement of N74F541N,602?
All N74F541N,602 units undergo pre-shipment inspection (PSI). If there is an issue with N74F541N,602, 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 N74F541N,602 part is unused and in its original packaging.
Return procedure for N74F541N,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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