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NXP Semiconductors N74F245N,602
- Part No.:
- N74F245N,602
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
N74F245N,602.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,249
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Product details
Overview
N74F245N,602 from Nexperia is an octal bidirectional 3-state transceiver IC used for bus interface isolation and data direction control in TTL-compatible digital systems. It features non-inverting logic, 4.0 ns typical propagation delay, ±5 V supply operation, 64 mA sink capability on B-port outputs, and high-impedance outputs during power-off - enabling safe hot-swap and bus sharing in industrial backplanes and legacy computing interfaces.
For engineers reviewing the N74F245N,602 datasheet, N74F245N,602 pinout, N74F245N,602 application, or N74F245N,602 equivalent, key selection criteria include verified 3-state timing margins, B-port drive strength (64 mA sink / 15 mA source), OE/T/R control logic compatibility, and DIP-20 mechanical fit for through-hole PCB designs requiring legacy 74F logic interoperability.
Technical Context
The N74F245N,602 implements dual-directional data flow between A and B ports under independent control of Transmit/Receive (T/R) and Output Enable (OE) inputs. Its 3-state outputs prevent bus contention when disabled, and internal design ensures output high-impedance state during VCC removal - critical for system-level power sequencing.
It operates strictly within commercial temperature range (0°C to +70°C) at 4.5–5.5 V supply, with input thresholds defined at VIL ≤ 0.8 V and VIH ≥ 2.0 V, and meets FAST TTL loading standards (3.5/1.0 U.L. on data pins). Propagation delay is symmetrical (tPLH/tPHL ≤ 6.0 ns max) across both directions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74F FAST TTL - ensures compatibility with legacy 74F, 74AS, and 74ALS systems |
| Propagation Delay | 4.0 ns typical (A↔B), ≤6.0 ns max - enables reliable operation up to ~100 MHz bus clocking |
| B-port Sink Current | 64 mA per pin - drives heavy capacitive loads (e.g., long traces, multiple TTL inputs) |
| A-port Source/Sink | 15 mA source / 24 mA sink - supports standard TTL fan-out without external buffers |
| Supply Voltage Range | 4.5 V to 5.5 V - matches regulated 5 V rails in industrial and computing equipment |
| Operating Temperature | 0°C to +70°C - certified for commercial-grade embedded and peripheral applications |
| Input Loading | 3.5/1.0 FAST unit load (HI/LO) - defines maximum parallel input count without signal degradation |
Pinout & Package
Package: Plastic Dual In-line Package (DIP-20), 300 mil width, through-hole mount (SOT146-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (T/R) | Transmit/Receive control | Low = B→A data flow; High = A→B data flow - determines bus directionality |
| 2–9 (A0–A7) | A-port bidirectional I/O | Non-inverting data path; 3-state when OE = High - connects to local subsystem bus |
| 10 (GND) | Ground reference | Primary return path for all logic and output currents |
| 11 (VCC) | Power supply | +5 V supply input; decoupling required within 1 cm for noise immunity |
| 12 (OE) | Output Enable (active Low) | Low = outputs enabled; High = all A/B ports enter high-impedance - enables bus arbitration |
| 13–20 (B0–B7) | B-port bidirectional I/O | Non-inverting data path; 64 mA sink capability - interfaces to main system bus |
Key Features
| Feature | Design Value |
|---|---|
| Octal bidirectional bus interface | Enables full-duplex data exchange between two 8-bit buses using single control signals (OE/T/R) |
| 64 mA B-port sink current | Drives up to 16 standard TTL loads directly - eliminates need for external line drivers |
| Power-off high-impedance outputs | Prevents back-driving and bus contention when VCC is removed - supports hot-plug-safe subsystems |
| 4.0 ns typical propagation delay | Meets timing budgets for 25 MHz synchronous bus cycles with margin - suitable for legacy CPU data paths |
| FAST TTL compatible loading | 3.5/1.0 unit load specification ensures predictable fan-out and signal integrity in mixed-logic systems |
Applications
| Industrial Backplane Interface | Legacy PC Peripheral Bridge |
|---|---|
Use Scenario: Isolating microcontroller subsystem bus from shared chassis backplane in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional level-shifting transceiver managing data flow between isolated 5 V domains with precise 3-state timing control. Use Value: Prevents bus contention during reset sequences and enables clean power-up sequencing across distributed modules. | Use Scenario: Connecting ISA-bus-compatible expansion cards (e.g., serial/parallel adapters) to host controller logic. IC Role / Device Role / Timing Role: Octal bus transceiver providing direction-controlled data transfer between host and peripheral with sub-6 ns delay. Use Value: Maintains strict ISA timing compliance while supporting hot-insertion via power-off high-Z behavior. |
| Test Equipment Data Bus Arbiter | Embedded Instrumentation Subsystem |
Use Scenario: Multiplexing multiple sensor acquisition channels onto a single high-speed data capture bus in automated test systems. IC Role / Device Role / Timing Role: 3-state bus interface enabling time-shared access to shared memory or ADC FIFO by multiple sources. Use Value: Eliminates need for discrete multiplexers; 64 mA drive ensures signal integrity over 15 cm ribbon cable runs. | Use Scenario: Interfacing 8-bit microcontroller peripherals (e.g., display drivers, keypad scanners) to a central diagnostic bus. IC Role / Device Role / Timing Role: Direction-controllable transceiver isolating low-power subsystem from noisy main bus environment. Use Value: Reduces EMI coupling via controlled 3-state transitions and provides robust 0.5 VOL noise margin at 24 mA load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F245N | Identical pinout, timing, and DC specs; Texas Instruments variant with same 74F family architecture | No functional difference; validated in TI's 74F logic portfolio for identical use cases | Select when TI-sourced supply chain or dual-sourcing strategy is required |
| 74ACT245PC | Higher speed (tP ≤ 4.5 ns), CMOS input levels (VIH = 3.5 V), lower ICC (20 mA typical) | Requires 3.3 V or 5 V supply; not TTL-input compatible - unsuitable for legacy 74F/74LS systems | Choose only if upgrading to ACT logic family and redesigning input interface levels |
Compared with SN74F245N and 74ACT245PC, the N74F245N,602 offers guaranteed 74F TTL compatibility, proven DIP-20 reliability in long-lifecycle industrial hardware, and native support for legacy 5 V bus architectures - making it the preferred choice where backward compatibility and mechanical fit are mandatory.
Availability
N74F245N,602 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy PC peripheral bridges, and test equipment data bus arbiters requiring stable component supply across extended production lifecycles.
Supply support for N74F245N,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
Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division.
The N74F245N,602 belongs to Nexperia's legacy 74F logic family, designed specifically for backward-compatible replacement in commercial-grade digital systems requiring robust TTL interoperability and through-hole mounting.
FAQ
What is the operating voltage range for the N74F245N,602?
The N74F245N,602 operates over a supply voltage range of 4.5 V to 5.5 V, with nominal performance specified at 5.0 V ±10%. This range ensures compatibility with standard regulated 5 V power supplies used in industrial and computing equipment. The device is not rated for 3.3 V operation, and applying voltages outside this range may impair functionality or reliability. All DC and AC specifications in the datasheet assume VCC within these limits.
Does the N74F245N,602 support hot-swap or live insertion?
Yes, the N74F245N,602 supports safe hot-swap operation due to its power-off high-impedance feature: when VCC is removed, all outputs (A0–A7 and B0–B7) automatically enter a high-impedance state. This prevents back-driving or bus contention during insertion/removal. However, proper board-level protection (e.g., series resistors, slew-rate limiting) is still recommended to manage inrush and signal integrity during live connection.
What is the maximum fan-out capability of the N74F245N,602 B-port outputs?
The B-port outputs of the N74F245N,602 can sink up to 64 mA each and source up to 15 mA, allowing direct drive of up to 16 standard TTL loads (defined as 1.6 mA per input) in the low state. Fan-out is limited by the 3.5 FAST unit load rating on data inputs and the 750/106.7 U.L. output loading specification - meaning it can reliably drive multiple downstream 74F or 74AS inputs without external buffering in most legacy bus configurations.
Is the N74F245N,602 pin-compatible with other 74F245 variants?
Yes, the N74F245N,602 is fully pin-compatible with all industry-standard 74F245 DIP-20 packages, including SN74F245N and original Philips 74F245N. Pin configuration, electrical characteristics, and timing parameters match the JEDEC-standard 74F245 footprint. This allows direct substitution in existing designs without PCB modification, provided the same 5 V supply and commercial temperature requirements are met.
What are the absolute maximum ratings for output current on the N74F245N,602?
The absolute maximum low-level output current for the N74F245N,602 is 128 mA per B-port pin (B0–B7), and 48 mA per A-port pin (A0–A7), as specified in the Absolute Maximum Ratings table. These values represent stress limits only - sustained operation above recommended conditions (e.g., 64 mA sink for B-port) may reduce reliability. Short-circuit current (IOS) is rated at –100 to –225 mA for B-port outputs, but testing must follow datasheet guidelines to avoid thermal damage.
N74F245N,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:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 3mA, 24mA; 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
N74F245N,602 FAQ
1.How can I place an order for N74F245N,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for N74F245N,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 N74F245N,602 reliable?
The price and inventory of N74F245N,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for N74F245N,602 is usually 5 days.
3.What payment methods are accepted for N74F245N,602?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for N74F245N,602 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for N74F245N,602?
N74F245N,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your N74F245N,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 N74F245N,602?
For technical support, including N74F245N,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your N74F245N,602 requirements.
6.How does Aetrix verify that N74F245N,602 is sourced from the original manufacturer or authorized distributors?
All N74F245N,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 N74F245N,602 meets industry standards.
7.What is the process for return or replacement of N74F245N,602?
All N74F245N,602 units undergo pre-shipment inspection (PSI). If there is an issue with N74F245N,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 N74F245N,602 part is unused and in its original packaging.
Return procedure for N74F245N,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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