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NXP Semiconductors N74F640N,602
- Part No.:
- N74F640N,602
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
N74F640N,602.pdf
- Description:
- IC BUFFER INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,625
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Product details
Overview
N74F640N,602 from Nexperia is an octal inverting 3-state bus transceiver in a 20-pin plastic DIP package, operating at 5V ±10% over 0°C to +70°C. It provides bidirectional data flow between A and B ports with inverting logic, supports 64mA sink / 15mA source drive on B-port outputs, and features independent T/R direction control and active-low OE enable-used in legacy TTL-level system bus isolation and level-shifting applications.
For engineers reviewing the N74F640N,602 datasheet, N74F640N,602 pinout, N74F640N,602 application, or N74F640N,602 equivalent, key selection criteria include verified 3-state output drive capability (64mA sink), propagation delay (≤8.0ns max), input loading (70µA), T/R/OE logic compatibility with 74F-family systems, and DIP-20 mechanical fit for through-hole industrial backplanes.
Technical Context
The N74F640N,602 implements dual-directional inverting data transfer via separate A-port (A0–A7) and B-port (B0–B7) terminals, with direction determined by the T/R input and output state controlled by the active-low OE signal. Its 3-state outputs are designed to disconnect fully when disabled, preventing bus contention even during power-down.
It uses standard 74F bipolar TTL process technology, delivering 3.5ns typical propagation delay and 78mA typical supply current at 5V/25°C. Input thresholds (VIH = 2.0V, VIL = 0.8V) and output voltage levels (VOH ≥ 2.7V, VOL ≤ 0.55V) comply with F-series TTL interface standards for interoperability with legacy 74F245-based systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V to 5.5V - ensures stable operation across standard 5V rail tolerances in industrial backplane environments |
| Propagation Delay | Max 8.0ns (An↔Bn) - enables reliable timing in high-speed 74F-system bus cycles up to ~125MHz |
| B-port Output Drive | Sinks 64mA / sources 15mA - supports direct driving of multiple TTL loads without external buffers |
| Input Loading | 70µA per A/B port pin - minimizes bus loading in fan-out-critical legacy designs |
| Operating Temperature | 0°C to +70°C - validated for commercial-grade embedded control and instrumentation applications |
| 3-State Leakage | ±70µA off-state current - guarantees high-impedance integrity during OE disable, critical for hot-swap bus arbitration |
Pinout & Package
Package: 20-pin plastic dual in-line package (DIP), SOT146-1 footprint, 300 mil width, through-hole mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| T/R (Pin 1) | Direction control input | Low = B→A data transfer; High = A→B; determines signal flow path in bidirectional bus architecture |
| OE (Pin 11) | Output enable (active low) | Low = outputs enabled; High = all A/B port outputs enter high-impedance state for bus sharing |
| A0–A7 (Pins 2–9) | A-port data I/O | Inverting inputs/outputs for one bus segment; compatible with standard 74F245 A-side interface |
| B0–B7 (Pins 12–19) | B-port data I/O | Inverting inputs/outputs for second bus segment; higher drive strength (64mA sink) than A-port |
| VCC (Pin 20) | Positive supply | +5V power connection; decoupling required within 1 inch for noise-sensitive bus switching |
| GND (Pin 10) | Ground reference | Signal and power return; must be low-inductance connection to maintain 3-state integrity |
Key Features
| Feature | Design Value |
|---|---|
| Inverting bidirectional logic | Preserves signal polarity inversion across both directions-required for compatibility with existing 74F640-based schematics and firmware |
| High-current B-port outputs | 64mA sink capability allows direct interface to multiple TTL inputs or LED indicators without added drivers |
| Low-input-current base design | 70µA per input reduces loading on upstream drivers, extending fan-out in daisy-chained bus topologies |
| Power-loss-safe 3-state | Outputs remain high-impedance even if VCC is removed-prevents back-driving and latch-up in partial-power-down systems |
Applications
| Industrial Backplane Bus Isolation | Legacy System Level-Shifting |
|---|---|
Use Scenario: Isolating CPU and peripheral modules on a 19-inch rack-mounted industrial backplane using discrete 5V TTL signaling. IC Role / Device Role / Timing Role: Bidirectional inverting transceiver managing data flow between processor and I/O card slots under T/R direction control. Use Value: Prevents bus contention during module insertion/removal via guaranteed high-impedance state when OE is inactive. | Use Scenario: Interfacing newer microcontroller peripherals with older 74F-based logic subsystems requiring inverted data paths. IC Role / Device Role / Timing Role: Voltage- and logic-level translator providing inverting bidirectional handshake between mismatched controller and legacy ASIC. Use Value: Eliminates need for discrete inverters and buffers-reduces component count and board space in retrofit designs. |
| Test Equipment Signal Routing | Automated Manufacturing Fixture Control |
Use Scenario: Configurable signal routing in automated test equipment where DUT interface lines must be dynamically reversed or isolated. IC Role / Device Role / Timing Role: Reversible bus gate enabling programmable signal path selection under microcontroller T/R/OE control. Use Value: Supports single-hardware platform for multiple DUT types via software-defined signal direction and enable states. | Use Scenario: Controlling parallel I/O lines in PC-based manufacturing fixtures interfacing with legacy PLCs and sensors. IC Role / Device Role / Timing Role: Robust bus driver buffering PC LPT signals to industrial 5V TTL inputs while supporting bidirectional handshaking. Use Value: Delivers 64mA sink drive needed for long-line sensor actuation without external transistors or relays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74F245N,602 | Non-inverting logic; identical pinout, package, and drive specs (64mA sink) | Requires external inversion for signal compatibility; used where polarity preservation is not required | Select when system logic does not depend on inversion-simplifies timing analysis and eliminates need for complementary logic |
| SN74F640N | Same function, pinout, and specs; manufactured by Texas Instruments, not Nexperia | No functional difference; TI version may have alternate lot traceability and RoHS compliance documentation | Choose based on supply chain preference or qualification requirements-fully interchangeable in hardware |
Compared with N74F640N,602, the 74F245N,602 removes inversion overhead but requires redesign of downstream logic, while SN74F640N offers identical electrical behavior with alternate sourcing-making it ideal for dual-sourcing strategies without layout changes.
Availability
N74F640N,602 is available at Aetrix Electronics and suitable for industrial backplane bus isolation, legacy system level-shifting, and automated test equipment signal routing requiring stable component supply across extended production lifecycles.
Supply support for N74F640N,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 74F logic family-including N74F640N,602-is engineered for robustness in commercial-grade industrial, computing, and automotive auxiliary systems where proven TTL compatibility and long-term supply stability are essential.
FAQ
What is the logic function of the N74F640N,602?
The N74F640N,602 is an octal inverting 3-state bus transceiver. Data transferred from A to B or B to A undergoes logical inversion; for example, a HIGH on A0 appears as LOW on B0 when enabled. This matches the 74F640 functional specification and distinguishes it from the non-inverting 74F245. The N74F640N,602 achieves this using standard 74F bipolar TTL circuitry with confirmed inverting behavior across all eight channels.
Does the N74F640N,602 support hot-swap or power-loss-safe operation?
Yes-the N74F640N,602 3-state outputs remain in high-impedance mode even when VCC is removed, preventing back-driving of powered bus segments. This behavior is explicitly documented in the Philips/Nexperia datasheet under "3-State outputs…designed to prevent output bus loading if the power is removed." The N74F640N,602 thus supports safe insertion/removal in partially powered systems.
What are the absolute maximum ratings for the N74F640N,602?
The N74F640N,602 has an absolute maximum supply voltage of –0.5V to +7.0V, input voltage range of –0.5V to +7.0V, and output short-circuit current limits of –150mA (A-port) and –225mA (B-port). Operating beyond these values risks permanent damage. These ratings are defined in the original Philips datasheet and retained in Nexperia's documentation for the N74F640N,602.
Can the N74F640N,602 replace the 74F245 in an existing design?
No-direct replacement is not possible due to logic inversion: the N74F640N,602 inverts all data, while the 74F245 does not. Swapping them would cause functional failure unless upstream/downstream logic compensates. However, the N74F640N,602 shares identical pinout, package, supply, and drive specs with the 74F245, making it a drop-in replacement only when inversion is intentionally required.
What is the recommended operating temperature range for the N74F640N,602?
The N74F640N,602 is specified for commercial operation from 0°C to +70°C ambient temperature, with supply voltage 4.5V to 5.5V. This range is confirmed in the "Recommended Operating Conditions" table of the Philips/Nexperia datasheet and applies strictly to the N74F640N,602 variant in DIP-20 (SOT146-1) packaging.
N74F640N,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:
- 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
N74F640N,602 FAQ
1.How can I place an order for N74F640N,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for N74F640N,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 N74F640N,602 reliable?
The price and inventory of N74F640N,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for N74F640N,602 is usually 5 days.
3.What payment methods are accepted for N74F640N,602?
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4.How is shipping managed for N74F640N,602?
N74F640N,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your N74F640N,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 N74F640N,602?
For technical support, including N74F640N,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your N74F640N,602 requirements.
6.How does Aetrix verify that N74F640N,602 is sourced from the original manufacturer or authorized distributors?
All N74F640N,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 N74F640N,602 meets industry standards.
7.What is the process for return or replacement of N74F640N,602?
All N74F640N,602 units undergo pre-shipment inspection (PSI). If there is an issue with N74F640N,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 N74F640N,602 part is unused and in its original packaging.
Return procedure for N74F640N,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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