My Inquiry
My Account
NXP Semiconductors N74F540N,602
- Part No.:
- N74F540N,602
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
N74F540N,602.pdf
- Description:
- IC BUFFER INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,203
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
N74F540N,602 from Philips Semiconductors is an octal inverting 3-state buffer IC designed for bus interface and memory address register driving in TTL-compatible digital systems. It features 8 inverting data channels, 3-state outputs capable of sinking 64mA and sourcing 15mA, propagation delay of 3.5ns (typical), and operates at 5V ±10% over 0°C to +70°C.
For engineers reviewing the N74F540N,602 datasheet, N74F540N,602 pinout, N74F540N,602 application, or N74F540N,602 equivalent, key selection criteria include its inverting logic function, dual active-low output enable inputs (OE0/OE1), high-current 3-state drive capability, and DIP-20 package layout optimized for PCB routing.
Technical Context
The N74F540N,602 implements eight independent inverting buffer stages with complementary 3-state control via two active-low enable inputs (OE0 and OE1). Each output supports high-drive capability (64mA sink / 15mA source) and exhibits low propagation delay (3.5ns typical) under 50pF load conditions.
Its input structure uses high-impedance NPN bases drawing only ±20µA in both logic states, minimizing bus loading. The pinout places inputs on one side and outputs on the opposite side of the 20-pin DIP package to simplify trace routing and reduce crosstalk in dense bus architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Octal inverting buffer with 3-state outputs |
| Propagation Delay | 3.5ns typical (In to Yn, CL = 50pF, VCC = 5V) |
| Output Drive | Sinks 64mA / sources 15mA - supports heavy capacitive bus loads |
| Supply Current | 58mA typical total ICC (active state, VCC = 5V) |
| Input Loading | 20µA max per input in High/Low states - reduces fan-out burden |
| Operating Range | 0°C to +70°C ambient, 4.5V–5.5V supply - commercial-grade reliability |
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 | I0–I7, VCC | Data inputs (inverting); positive supply rail (pin 20) |
| 2–3, 18 | OE0, OE1, Y0 | Active-low output enables (pins 1, 19); inverted output channel 0 (pin 2) |
| 4–7, 15–17 | Y1–Y4, Y5–Y7 | Inverted output channels Y1–Y7 (pins 4–7, 15–17) |
| 8–9, 11–14 | I1–I3, I4–I7 | Data inputs I1–I7 (pins 8–9, 11–14) |
| 10 | GND | Ground reference (pin 10) - central location aids noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Inverting 3-state logic | Enables bidirectional bus control with polarity inversion for signal conditioning |
| Dual active-low OE inputs | Allows independent or combined gating of all 8 outputs without external logic |
| High-current output drive | 64mA sink capability ensures robust driving of long traces or multiple TTL loads |
| Low input current loading | ±20µA input bias minimizes loading on upstream drivers and improves system fan-out |
| Opposite-side I/O pin arrangement | Reduces PCB trace crossing and simplifies bus routing in compact layouts |
Applications
| Microprocessor Address Bus Interface | Memory Address Latching System |
|---|---|
Use Scenario: Driving 16-bit address lines from a microprocessor to multiple memory chips with controlled timing and isolation. IC Role / Device Role / Timing Role: Inverting 3-state buffer isolating and amplifying address signals while enabling/disabling bus segments via OE0/OE1. Use Value: Prevents address contention during DMA cycles; 3.5ns delay ensures setup/hold compliance with 8MHz–12MHz CPU buses. | Use Scenario: Buffering and latching address bits between multiplexed address/data buses and static RAM arrays. IC Role / Device Role / Timing Role: Provides level-shifted, inverted address output with high sink current to drive RAM address inputs reliably. Use Value: 64mA sink capacity handles capacitive loading of up to 12 SRAM devices per channel without signal degradation. |
| Industrial Control Backplane Bus | Legacy Instrumentation Data Multiplexing |
Use Scenario: Interfacing multiple PLC I/O modules to a shared backplane data bus with hot-swap isolation. IC Role / Device Role / Timing Role: Octal inverter buffer enabling/disabling module-specific address and control lines using dedicated OE signals. Use Value: Dual OE inputs allow selective activation of subsets of outputs, supporting modular fault containment and live insertion. | Use Scenario: Multiplexing analog-to-digital converter channel select lines and status flags in multi-channel test equipment. IC Role / Device Role / Timing Role: Inverting logic-level translator and driver for TTL-compatible control sequencing across isolated instrument subsystems. Use Value: Low 20µA input current prevents loading of sensitive DAC reference buffers; 3-state operation eliminates signal conflicts during reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F240N | Same logic function and pinout; slightly higher propagation delay (4.0ns typ) and lower sink current (60mA) | Compatible in legacy designs but marginally reduced drive strength for heavily loaded buses | Select when cross-referencing TI-based BOMs or where minor timing variation is acceptable |
| 74ACT540PC | Advanced CMOS version; 5V-tolerant inputs, lower ICC (20mA typ), faster tPLH/tPHL (3.0ns typ), but requires 4.5–5.5V supply | Better noise immunity and lower power, but not drop-in due to different AC characteristics and input threshold behavior | Choose for new designs requiring lower power and improved noise margin; verify timing closure with 50pF load |
Compared with SN74F240N and 74ACT540PC, the N74F540N,602 offers superior sink current (64mA vs. 60mA/50mA) and proven compatibility with legacy 74F-system timing budgets, making it optimal for refurbishment and industrial replacement where drive strength and timing predictability are critical.
Availability
N74F540N,602 is available at Aetrix Electronics and suitable for microprocessor address buffering, memory interface design, and industrial backplane bus applications requiring stable component supply and long-term obsolescence management.
Supply support for N74F540N,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) is a Dutch-origin semiconductor company known for pioneering TTL, CMOS, and fast-F logic families in the 1970s–1990s.
The 74F logic family - including the N74F540N,602 - was engineered for high-speed, low-power digital interfacing in computing and industrial control systems, targeting 5V systems with strict timing and drive requirements.
FAQ
What is the logic function of the N74F540N,602?
The N74F540N,602 is an octal inverting 3-state buffer: each of its eight inputs (I0–I7) drives a corresponding inverted output (Y0–Y7), and all outputs enter high-impedance state when either OE0 or OE1 is high. This function is confirmed in the Philips IC15 Data Handbook and matches the 74F540 type definition precisely.
Does the N74F540N,602 support 3.3V operation?
No, the N74F540N,602 is specified only for 4.5V–5.5V supply operation per its Recommended Operating Conditions table. It lacks 3.3V logic-level compatibility and is not characterized for use below 4.5V; attempting 3.3V operation may result in undefined output states or excessive ICCZ leakage.
What is the pin configuration of the N74F540N,602?
The N74F540N,602 uses a 20-pin DIP package (SOT146-1) with VCC at pin 20, GND at pin 10, inputs I0–I7 distributed across pins 1, 8–9, 11–14, outputs Y0–Y7 at pins 2–7 and 15–17, and OE0/OE1 at pins 1 and 19. This layout is documented in the Philips product specification Figure SF01060.
How does the N74F540N,602 differ from the 74F541?
The N74F540N,602 is the inverting version (Yn = NOT In), whereas the 74F541 is non-inverting (Yn = In). Both share identical pinout, 3-state control, drive strength (64mA sink), and timing specs except propagation delay (3.5ns vs. 5.5ns typical), as confirmed in the Philips comparison table on page 2 of the datasheet.
Is the N74F540N,602 RoHS compliant?
The N74F540N,602 is a legacy 1990s-era component manufactured prior to RoHS legislation; its datasheet contains no RoHS statement, and leaded solder finish is standard for this DIP package. For RoHS-compliant alternatives, consult modern equivalents like 74ACT540 or SN74LVC8T245 with appropriate level-shifting.
N74F540N,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, 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
N74F540N,602 FAQ
1.How can I place an order for N74F540N,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for N74F540N,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 N74F540N,602 reliable?
The price and inventory of N74F540N,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for N74F540N,602 is usually 5 days.
3.What payment methods are accepted for N74F540N,602?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for N74F540N,602 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for N74F540N,602?
N74F540N,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your N74F540N,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 N74F540N,602?
For technical support, including N74F540N,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your N74F540N,602 requirements.
6.How does Aetrix verify that N74F540N,602 is sourced from the original manufacturer or authorized distributors?
All N74F540N,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 N74F540N,602 meets industry standards.
7.What is the process for return or replacement of N74F540N,602?
All N74F540N,602 units undergo pre-shipment inspection (PSI). If there is an issue with N74F540N,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 N74F540N,602 part is unused and in its original packaging.
Return procedure for N74F540N,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
N74F540N,602 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
