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NXP Semiconductors N74F245DB,118
- Part No.:
- N74F245DB,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
N74F245DB,118.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,629
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Product details
Overview
N74F245DB,118 from Nexperia is an octal bidirectional 3-state transceiver IC used for bus interface isolation and data direction control between two 8-bit parallel buses. 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 hot-swap compatibility in industrial backplane and legacy computing systems.
For engineers reviewing the N74F245DB,118 datasheet, N74F245DB,118 pinout, N74F245DB,118 application, or N74F245DB,118 equivalent, key selection criteria include bidirectional bus drive strength (64 mA sink / 15 mA source), 3-state enable timing (tPZH/tPLZ ≤ 9.0 ns), T/R-controlled direction logic, and SSOP20 package compatibility with legacy 74F footprint designs.
Technical Context
The N74F245DB,118 implements a dual-bus transceiver architecture with separate A-port and B-port I/Os, controlled by active-low Output Enable (OE) and Transmit/Receive (T/R) inputs. Its non-inverting signal path supports both A→B and B→A data flow, with independent 3-state control per port group.
Designed for TTL-compatible 5 V systems, it meets FAST logic timing standards: tPLH/tPHL ≤ 6.0 ns (max), tPZH/tPZL ≤ 9.0 ns (max), and ICC ≤ 100 mA under full load - ensuring deterministic bus settling in high-speed digital backplanes and memory-mapped I/O subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures stable operation across standard 5 V ±10% industrial rails |
| Propagation Delay | 4.0 ns typical (An↔Bn) - enables sub-250 MHz bus cycle timing in synchronous interfaces |
| B-port Sink Current | 64 mA - drives heavy capacitive loads (e.g., >100 pF traces or multiple TTL inputs) |
| A-port Source Current | 15 mA - sufficient for driving standard TTL fan-out without external buffers |
| 3-State Enable Time | ≤ 9.0 ns (tPZH/tPZL max) - minimizes bus contention window during direction switching |
| Operating Temperature | 0 °C to +70 °C - certified for commercial-grade embedded and computing equipment |
| Input Loading | A/B ports: 3.5/1.0 FAST unit loads - defines compatible input drive strength and fan-out limits |
Pinout & Package
Package: Plastic shrink small outline package (SSOP20), 20 leads, body width 5.3 mm (SOT339-1), lead pitch 0.65 mm - surface-mount compatible with automated assembly and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (T/R) | Transmit/Receive control input | Active-High selects A→B direction; Active-Low selects B→A direction |
| 2–9 (A0–A7) | A-port bidirectional I/Os | Non-inverting data terminals; high-impedance when OE = High |
| 10 (GND) | Ground reference | Primary return path for all I/O and supply currents |
| 11 (VCC) | Positive supply | 5 V ±10% power rail for internal logic and output drivers |
| 12 (OE) | Output Enable (active Low) | Disables both A and B ports into high-impedance state when High |
| 13–19,20 (B0–B7) | B-port bidirectional I/Os | Non-inverting data terminals; 64 mA sink capability supports heavy bus loading |
Key Features
| Feature | Design Value |
|---|---|
| Octal bidirectional bus interface | Enables full-duplex 8-bit data exchange between isolated system domains without external direction logic |
| 64 mA B-port sink current | Drives long PCB traces, multiple TTL loads, or legacy memory address/data buses without buffering |
| Power-off high-impedance outputs | Prevents back-driving and bus contention when VCC is removed - critical for hot-swap and modular backplane designs |
| 4.0 ns typical propagation delay | Supports >200 MHz effective bus toggle rates in tightly timed control applications |
| TTL-compatible input thresholds | VIL = 0.8 V / VIH = 2.0 V ensures robust noise margin and interoperability with legacy 74-series logic |
Applications
| Industrial Backplane Interface | Legacy Computing I/O Expansion |
|---|---|
Use Scenario: Isolating CPU local bus from peripheral expansion slots in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Bidirectional data transceiver managing address/data handshaking between microcontroller and add-on modules. Use Value: 64 mA B-port sink current drives long backplane traces; 3-state control prevents bus contention during module insertion/removal. | Use Scenario: Extending ISA or VMEbus I/O in retro-computing or test instrumentation systems. IC Role / Device Role / Timing Role: Level-shifting and direction-controlled buffer between processor bus and legacy peripheral ASICs. Use Value: 4.0 ns propagation delay maintains tight timing budgets; SSOP20 package fits dense legacy board layouts. |
| Memory-Mapped Peripheral Bridge | Digital Signal Processor (DSP) Data Bus Interface |
Use Scenario: Interfacing FPGA-based peripherals to microcontroller memory-mapped address space. IC Role / Device Role / Timing Role: Direction-controlled bus transceiver enabling read/write access to external registers and FIFOs. Use Value: T/R input synchronizes data flow with processor strobes; OE allows dynamic bus arbitration in multi-master systems. | Use Scenario: Connecting external ADC/DAC banks to TI C6000 or Analog Devices SHARC DSP buses. IC Role / Device Role / Timing Role: Bidirectional data path isolator with precise timing control for sample-data transfer cycles. Use Value: Sub-6 ns max propagation delay aligns with DSP external memory interface timing windows; 15 mA source current drives DSP input loads reliably. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F245N | DIP20 package (SOT146-1); identical electrical specs and pinout | Suitable for through-hole prototyping or legacy DIP-based systems | Select when manual assembly, breadboarding, or socket-based field upgrades are required |
| 74ABT245BQ | Higher drive (100 mA sink), 3.3 V operation, improved ESD rating (±4 kV HBM) | Required for modern low-voltage mixed-signal systems with tighter noise margins | Select when upgrading from 5 V to 3.3 V infrastructure or requiring enhanced robustness in noisy environments |
Compared with SN74F245N and 74ABT245BQ, the N74F245DB,118 provides identical 5 V FAST logic performance in a space-saving SSOP20 package - making it optimal for volume production of compact industrial controllers where legacy 74F compatibility and SMT manufacturability are both essential.
Availability
N74F245DB,118 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy computing I/O expansion, and memory-mapped peripheral bridging requiring stable component supply and long-term obsolescence management.
Supply support for N74F245DB,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 leader in discrete, logic, and PowerMOS semiconductors, serving automotive, industrial, computing, consumer, and wearable markets with high-volume, high-reliability components.
The 74F family - including the N74F245DB,118 - was originally developed by Philips Semiconductors and continues under Nexperia to deliver pin- and function-compatible replacements for legacy FAST logic systems demanding proven reliability and long-lifecycle support.
FAQ
What is the maximum operating temperature range for the N74F245DB,118?
The N74F245DB,118 is rated for operation from 0 °C to +70 °C - the commercial temperature range defined in its original Philips Semiconductors product specification. This range is validated for use in office equipment, industrial control panels, and non-automotive embedded systems where ambient thermal conditions remain within these limits. The N74F245DB,118 does not support extended or automotive temperature grades.
Does the N74F245DB,118 support hot-swap functionality?
Yes, the N74F245DB,118 supports hot-swap operation due to its power-off high-impedance feature: when VCC is removed or drops below functional threshold, all outputs (A0–A7 and B0–B7) automatically enter a high-impedance state. This prevents back-driving and bus contention in modular backplane systems - a key design requirement confirmed in the Philips Semiconductors datasheet for the N74F245DB,118.
What is the pin compatibility status between N74F245DB,118 and SN74F245N?
The N74F245DB,118 and SN74F245N share identical pin functions and logic behavior but differ in package: N74F245DB,118 uses SSOP20 (SOT339-1), while SN74F245N uses DIP20 (SOT146-1). Their pinouts are functionally identical - T/R on pin 1, A0–A7 on pins 2–9, GND on pin 10, VCC on pin 11, OE on pin 12, and B0–B7 on pins 13–20 - enabling direct schematic reuse with only footprint adaptation required for the N74F245DB,118.
What are the absolute maximum ratings for output current on the B-port of N74F245DB,118?
The absolute maximum low-level output current rating for B0–B7 pins of the N74F245DB,118 is 128 mA per pin, as specified in the Absolute Maximum Ratings table of the Philips Semiconductors datasheet. This is distinct from the recommended operating condition of 64 mA sink current - the 128 mA value defines the failure threshold under fault conditions and must not be sustained during normal operation of the N74F245DB,118.
Is the N74F245DB,118 RoHS compliant?
Yes, the N74F245DB,118 is RoHS compliant. As a Nexperia product manufactured after the 2017 spin-off from NXP, it conforms to EU Directive 2011/65/EU (RoHS 2) and subsequent amendments. Lead-free terminations and halogen-free molding compound are standard for this SSOP20 package variant, consistent with Nexperia's global compliance policy applied to all active 74F family products including the N74F245DB,118.
N74F245DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74F
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
N74F245DB,118 FAQ
1.How can I place an order for N74F245DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for N74F245DB,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 N74F245DB,118 reliable?
The price and inventory of N74F245DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for N74F245DB,118 is usually 5 days.
3.What payment methods are accepted for N74F245DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for N74F245DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for N74F245DB,118?
N74F245DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your N74F245DB,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 N74F245DB,118?
For technical support, including N74F245DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your N74F245DB,118 requirements.
6.How does Aetrix verify that N74F245DB,118 is sourced from the original manufacturer or authorized distributors?
All N74F245DB,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 N74F245DB,118 meets industry standards.
7.What is the process for return or replacement of N74F245DB,118?
All N74F245DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with N74F245DB,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 N74F245DB,118 part is unused and in its original packaging.
Return procedure for N74F245DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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