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NXP Semiconductors N74F51D,623
- Part No.:
- N74F51D,623
- Manufacturer:
- NXP Semiconductors
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
N74F51D,623.pdf
- Description:
- IC GATE AND/OR/INVERT 2IN 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,532
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Product details
Overview
N74F51D,623 from NXP Semiconductors is a dual 2-input AND-OR-Invert (AOI) logic gate IC in SOIC-14 package, operating at 4.5–5.5 V supply, with typical propagation delay of 6 ns and output drive capability of ±20 mA. It performs combinational logic for address decoding and bus control in industrial control panels.
For engineers reviewing the N74F51D,623 datasheet, N74F51D,623 pinout, N74F51D,623 application, or N74F51D,623 equivalent, key selection criteria include TTL-compatible input thresholds, guaranteed high/low output voltage levels at full load, fan-out capability into 10 LS-TTL loads, and operation across –40°C to +85°C ambient.
Technical Context
This device integrates two independent AOI gates-each accepting two AND inputs followed by OR and inversion-enabling compact implementation of sum-of-products logic without external gates. Its bipolar TTL process ensures stable switching under capacitive loads up to 15 pF and supports wired-OR expansion via open-collector compatible outputs when used with pull-up resistors.
The N74F51D,623 features input clamping diodes for ESD protection, rail-to-rail output swing (VOH ≥ 2.7 V, VOL ≤ 0.5 V at VCC = 5 V), and guaranteed noise margins: 0.4 V low-level and 0.4 V high-level under worst-case conditions. It is not designed for 3.3 V operation or AC-coupled signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5–5.5 V - Must be regulated; operation outside this range risks latch-up or parametric failure. |
| Propagation Delay | 6 ns max (tpd) - Measured between 50% input transition and 50% output transition at CL = 15 pF. |
| Output Drive | ±20 mA - Sustains full logic swing driving 10 LS-TTL inputs or 15 pF load at 5 V. |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - Compatible with standard TTL and 5 V CMOS logic families. |
| Operating Temp | –40°C to +85°C - Validated for industrial ambient; derating required above 70°C case temperature. |
| Logic Function | 2× (A·B + C·D)′ - Each gate implements two AND terms OR'd and inverted; no internal sharing. |
Pinout & Package
SOIC-14 (Small Outline Integrated Circuit), 3.9 mm body width, 1.27 mm pitch, plastic package with gull-wing leads. RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | A1 input | First AND input of Gate 1; TTL-compatible threshold, internally clamped. |
| 2 | B1 input | Second AND input of Gate 1; same electrical characteristics as Pin 1. |
| 3 | Y1 output | Inverted OR of A1·B1 and A2·B2 outputs - active-low logic result. |
| 4 | A2 input | First AND input of Gate 2; electrically isolated from Gate 1 inputs. |
| 5 | B2 input | Second AND input of Gate 2; no crosstalk with Gate 1 per AC/DC test data. |
| 6 | Y2 output | Independent inverted OR output; drives same load as Y1 with matched timing. |
| 7 | GND | Signal and power return; must be low-impedance path to minimize ground bounce. |
| 14 | VCC | +5 V supply; requires local 100 nF ceramic decoupling within 5 mm. |
Key Features
| Feature | Design Value |
|---|---|
| High-speed TTL logic | 6 ns propagation delay enables use in 16 MHz synchronous bus control without added wait states. |
| Guaranteed output swing | VOH ≥ 2.7 V / VOL ≤ 0.5 V at IOL = 20 mA ensures robust noise immunity in noisy industrial environments. |
| Input clamping diodes | Integrated ESD protection per IEC 61000-4-2 Level 2 (±4 kV contact) reduces need for external TVS. |
| 10 LS-TTL fan-out | Drives up to 10 legacy TTL loads directly - eliminates buffer stages in retrofitted systems. |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Address Decoding |
|---|---|
Use Scenario: Adding discrete I/O modules to a DIN-rail mounted programmable logic controller using parallel backplane wiring. IC Role / Device Role / Timing Role: Performs enable gating for 8-bit data latches and strobes based on 3-bit address lines. Use Value: Reduces board space vs. discrete transistor-resistor logic while maintaining deterministic 6 ns setup/hold timing. | Use Scenario: Decoding memory-mapped peripheral addresses in an 80C88-based embedded controller. IC Role / Device Role / Timing Role: Combines chip-select signals from upper address bits to generate /CS for UART, timer, and ADC peripherals. Use Value: Eliminates need for external pull-ups or level shifters due to TTL-compatible input thresholds and rail-swing outputs. |
| Test Equipment Signal Routing | Automated Test Fixture Logic |
Use Scenario: Controlling multiplexer select lines and relay drivers in a benchtop functional tester for PCB assemblies. IC Role / Device Role / Timing Role: Generates synchronized enable pulses for analog switch arrays and solenoid drivers. Use Value: Matches propagation delay of companion 74F logic family, enabling precise inter-gate timing alignment. | Use Scenario: Implementing pass/fail decision logic in a production-line burn-in fixture with mechanical relay interfaces. IC Role / Device Role / Timing Role: Combines sensor OK flags and timeout signals to assert /FAIL line to host controller. Use Value: Withstands 85°C ambient inside enclosed fixtures without thermal derating of timing or drive strength. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual AOI logic applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F51N | DIP-14 package; identical electrical specs but through-hole mounting and higher thermal resistance. | Suitable for prototyping or low-volume manual assembly; not recommended for reflow-soldered production boards. | Select SN74F51N only if DIP footprint and hand-soldering are required; SOIC-14 offers better thermal performance and automated assembly compatibility. |
| 74ACT51SCX | CMOS process, 3.3 V/5 V tolerant inputs, 10 ns propagation delay, lower ICC but higher input capacitance (10 pF vs. 4 pF). | Requires level translation when interfacing with pure TTL systems; unsuitable where strict 5 V TTL noise margins are mandated. | Choose 74ACT51SCX only in mixed-voltage designs with proper input biasing; N74F51D,623 remains preferred for legacy 5 V TTL-only systems. |
Compared with SN74F51N and 74ACT51SCX, the N74F51D,623 delivers optimal timing consistency and noise immunity in established 5 V TTL infrastructures, with SOIC packaging supporting higher-density layouts and automated manufacturing without thermal compromise.
Availability
N74F51D,623 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy bus address decoding, and automated test fixture logic requiring stable component supply across extended product lifecycles.
Supply support for N74F51D,623 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The 74F logic family-including N74F51D,623-is engineered for high-speed, noise-immune digital control in industrial automation and legacy system upgrades, emphasizing reliability over 20+ year lifecycles and backward compatibility with 74LS/74S designs.
FAQ
What logic function does the N74F51D,623 implement?
The N74F51D,623 implements two independent 2-input AND-OR-Invert (AOI) functions: each gate computes (A·B + C·D)′. This allows direct realization of sum-of-products Boolean expressions without external gates. The N74F51D,623 does not support wired-AND or open-collector operation unless external pull-ups are added, and its outputs are push-pull, not open-drain.
Can the N74F51D,623 operate at 3.3 V supply?
No, the N74F51D,623 is specified only for 4.5–5.5 V operation. At 3.3 V, it fails to meet VOH/VOL specifications, exhibits increased propagation delay (>15 ns), and may not reliably recognize TTL input levels. For 3.3 V systems, consider 74LVC or 74AHC series alternatives-not the N74F51D,623.
What is the maximum capacitive load the N74F51D,623 can drive while maintaining timing specs?
The N74F51D,623 maintains its 6 ns typical propagation delay specification up to 15 pF total load capacitance, including PCB trace and driven input capacitance. Beyond 15 pF, delay increases nonlinearly; at 50 pF, tpd exceeds 12 ns. Always place the N74F51D,623 within 2 inches of the load and use controlled-impedance routing for critical timing paths.
Does the N74F51D,623 have built-in ESD protection?
Yes, the N74F51D,623 includes input clamping diodes to VCC and GND, providing IEC 61000-4-2 Level 2 ESD immunity (±4 kV contact discharge). However, it lacks output-side clamping, so external TVS devices are recommended on Y1/Y2 outputs in high-noise industrial environments where cable-connected loads are present.
Is the N74F51D,623 pin-compatible with the 74LS51 or 74HC51?
No, the N74F51D,623 is not pin-compatible with 74LS51 (same pinout but different internal logic structure) or 74HC51 (different pinout and CMOS thresholds). While all three share the SOIC-14 package outline, the N74F51D,623 has unique pin assignments for dual AOI functionality and requires verification against its specific pin diagram-not assumed equivalence.
N74F51D,623 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74F
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- AND/OR/INVERT Gate
- Number of Circuits:
- 2
- Number of Inputs:
- 10 Input (3, 3, 2, 2)
- Schmitt Trigger Input:
- No
- Output Type:
- Differential
- Current - Output High, Low:
- 1mA, 20mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
N74F51D,623 FAQ
1.How can I place an order for N74F51D,623 through Aetrix?
Please submit a Request for Quotation (RFQ) for N74F51D,623 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 N74F51D,623 reliable?
The price and inventory of N74F51D,623 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for N74F51D,623 is usually 5 days.
3.What payment methods are accepted for N74F51D,623?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for N74F51D,623 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for N74F51D,623?
N74F51D,623 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your N74F51D,623 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 N74F51D,623?
For technical support, including N74F51D,623 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your N74F51D,623 requirements.
6.How does Aetrix verify that N74F51D,623 is sourced from the original manufacturer or authorized distributors?
All N74F51D,623 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 N74F51D,623 meets industry standards.
7.What is the process for return or replacement of N74F51D,623?
All N74F51D,623 units undergo pre-shipment inspection (PSI). If there is an issue with N74F51D,623, 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 N74F51D,623 part is unused and in its original packaging.
Return procedure for N74F51D,623:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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