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NXP Semiconductors N74F126D,602
- Part No.:
- N74F126D,602
- Manufacturer:
- NXP Semiconductors
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
N74F126D,602.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,939
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Product details
Overview
N74F126D,602 from Philips Semiconductors is a quad 3-state buffer with active-high output enable, designed for bus interface and data routing in TTL-compatible digital systems. It delivers 5.0 ns typical propagation delay, ±15 mA high-level and 64 mA low-level output drive, and operates at 5.0 V ±10% over 0°C to +70°C.
For engineers reviewing the N74F126D,602 datasheet, N74F126D,602 pinout, N74F126D,602 application, or N74F126D,602 equivalent, key selection criteria include output enable polarity (active-high), SO14 package compatibility, 3-state fan-out capability (750/106.7 U.L.), and commercial-temperature supply current of 26 mA typical.
Technical Context
The N74F126D,602 implements four independent non-inverting buffers, each with an active-high output enable (OE) controlling tri-state output behavior. Its logic function follows Qn = Dn when OEn = H, and Qn = Z (high-impedance) when OEn = L.
It uses bipolar F-type (Fast TTL) technology with NPN base inputs limiting input loading to ±20 µA in both logic states. The device meets IEC/IEEE standard logic symbols and supports 50 pF capacitive load with 500 Ω termination in AC characterization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL rails and tolerates ±10% variation without level-shifting. |
| Propagation Delay (Dn→Qn) | 5.0 ns typical - enables reliable operation in high-speed bus cycles up to ~100 MHz in short trace environments. |
| Output Drive (IOH/IOL) | –15 mA / +64 mA - supports direct connection to multiple TTL inputs or moderate-capacitance PCB traces without buffering. |
| Input Loading | ±20 µA - reduces bus loading and allows higher fan-out than standard TTL without signal degradation. |
| Operating Temperature | 0°C to +70°C - certified for commercial-grade embedded control, instrumentation, and industrial logic subsystems. |
| 3-State Enable Polarity | Active-High OE - simplifies control logic when interfacing with microcontroller GPIOs or address decoders asserting enable signals high. |
Pinout & Package
Package: SO14 - plastic small outline, 14-lead, 3.9 mm body width (SOT108-1), surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | OE0–OE3 (Output Enable) | Active-high control inputs; pulling any OE low forces corresponding Q output into high-impedance state. |
| 2, 5, 9, 12 | D0–D3 (Data Inputs) | Non-inverting data inputs referenced to TTL voltage thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V). |
| 3, 6, 8, 11 | Q0–Q3 (Data Outputs) | Tri-state buffered outputs capable of sourcing –15 mA or sinking +64 mA in active state. |
| 7 | GND | Ground reference for all logic and power terminals; must be low-impedance connection to minimize noise coupling. |
| 14 | VCC | +5 V supply rail; bypassing with 0.1 µF ceramic capacitor near pin is required for stable AC performance. |
Key Features
| Feature | Design Value |
|---|---|
| Active-high 3-state enable | Eliminates need for external inverters when controlled by microcontrollers or decoders with active-high enable outputs. |
| Low input current (±20 µA) | Reduces cumulative loading on driving gates, enabling >20-unit-load fan-out on shared data buses. |
| High sink current (64 mA) | Directly drives LED indicators, relays, or multiple TTL inputs without external drivers in low-density logic designs. |
| 5.0 ns propagation delay | Supports synchronous bus timing in 20–25 MHz clock domains with margin for trace delays and setup/hold requirements. |
Applications
| Microprocessor Bus Interface | Data Acquisition Front-End |
|---|---|
Use Scenario: Isolating and driving bidirectional data bus lines between a microprocessor and peripheral ICs or memory devices. IC Role / Device Role / Timing Role: Bidirectional bus buffer with per-line 3-state control, enabling time-multiplexed read/write arbitration. Use Value: Prevents bus contention during memory access cycles and maintains signal integrity across 10+ inch PCB traces at 5 MHz burst rates. | Use Scenario: Conditioning parallel sensor outputs (e.g., ADC result latches) before transmission to a controller. IC Role / Device Role / Timing Role: Output latch driver with controlled enable timing to synchronize multi-channel sample capture. Use Value: Ensures glitch-free sampling window alignment by gating outputs only after conversion completion and settling. |
| Industrial Control Backplane | Legacy System Logic Expansion |
Use Scenario: Driving distributed I/O modules over a 16-bit parallel backplane in programmable logic controllers. IC Role / Device Role / Timing Role: Signal repeater and level translator for long-haul TTL signaling across noisy factory environments. Use Value: Maintains noise margin >400 mV while supporting 30 cm inter-module trace lengths and EMI immunity per IEC 61000-4-2 Level 3. | Use Scenario: Replacing obsolete 74LS126 or upgrading legacy test equipment logic with faster timing margins. IC Role / Device Role / Timing Role: Drop-in speed upgrade for existing 3-state buffer positions requiring no PCB redesign. Use Value: Improves system throughput by reducing bus turnaround time by 40% versus LS-series equivalents without changing firmware or layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F126N | DIP-14 package; identical electrical specs and pinout; same active-high OE functionality. | Through-hole mounting only; unsuitable for automated SMT assembly or space-constrained boards. | Select when manual prototyping, repair, or legacy through-hole production is required. |
| 74ACT126SCX | CMOS Advanced CMOS Technology; 3.3 V / 5 V tolerant; lower ICC (4 µA typ), but slower tPLH/tPHL (7.5 ns max). | Requires level translation if interfacing with pure 5 V TTL systems; not drop-in for VCC = 5 V ±10% without validation. | Select for mixed-voltage systems or ultra-low static power where 2.5 ns timing margin can be sacrificed. |
Compared with SN74F126N and 74ACT126SCX, the N74F126D,602 uniquely combines SO14 surface-mount compatibility, Fast TTL speed (5.0 ns), and guaranteed 5 V operation - making it optimal for cost-sensitive, high-volume commercial logic upgrades where board real estate and assembly automation matter.
Availability
N74F126D,602 is available at Aetrix Electronics and suitable for microprocessor bus interface, data acquisition front-end, industrial control backplane, and legacy system logic expansion requiring stable component supply and long-term commercial-temperature support.
Supply support for N74F126D,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 global semiconductor supplier specializing in analog, logic, and automotive ICs, with leadership in industrial and communications technologies.
The 74F logic family - including the N74F126D,602 - was engineered for high-speed, low-power TTL-compatible digital systems in commercial instrumentation, computing peripherals, and industrial control hardware.
FAQ
What is the output enable polarity of the N74F126D,602?
The N74F126D,602 features active-high output enable (OE) inputs: when OE is high, the corresponding Q output follows D; when OE is low, Q enters high-impedance state. This differs from the N74F125D,602, which uses active-low OE. The N74F126D,602 datasheet confirms this behavior in its Function Table on page 3.
Does the N74F126D,602 support 3.3 V operation?
No, the N74F126D,602 is specified only for 4.5 V to 5.5 V supply operation per its Recommended Operating Conditions table. It is not 3.3 V tolerant: applying 3.3 V to VCC falls outside the valid range and may cause unreliable logic levels or increased ICCZ leakage. Use the N74F126D,602 only in 5 V systems.
What is the maximum capacitive load the N74F126D,602 can drive reliably?
The N74F126D,602 is characterized for CL = 50 pF in AC Electrical Characteristics (page 5). While it can drive higher capacitance, signal integrity degrades beyond this value: propagation delay increases nonlinearly, and edge rates slow. For loads >50 pF, add series termination or use a dedicated line driver - the N74F126D,602 itself does not guarantee timing beyond 50 pF.
Is the N74F126D,602 pin-compatible with the 74LS126?
Yes, the N74F126D,602 shares identical pinout and logic function with the 74LS126, including active-high OE and non-inverting buffer behavior. However, due to higher output drive (64 mA vs. 8 mA) and faster speed (5 ns vs. 15 ns), verify that downstream loads and PCB traces can handle the increased slew rate and current - the N74F126D,602 is electrically compatible but not always functionally transparent in legacy LS designs.
What is the thermal resistance (θJA) for the N74F126D,602 in SO14 package?
The original Philips datasheet does not specify θJA for the N74F126D,602 in SO14 (SOT108-1) package. No thermal derating curves or junction-to-ambient values are provided in the 1989 specification. For thermal design, assume worst-case power dissipation of 130 mW (ICC × VCC = 26 mA × 5 V) and use board-level thermal modeling - the N74F126D,602 requires adequate copper pour and airflow in sustained high-drive applications.
N74F126D,602 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74F
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 1
- 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:
- Surface Mount
- Supplier Device Package:
- 14-SO
N74F126D,602 FAQ
1.How can I place an order for N74F126D,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for N74F126D,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 N74F126D,602 reliable?
The price and inventory of N74F126D,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for N74F126D,602 is usually 5 days.
3.What payment methods are accepted for N74F126D,602?
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4.How is shipping managed for N74F126D,602?
N74F126D,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your N74F126D,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 N74F126D,602?
For technical support, including N74F126D,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your N74F126D,602 requirements.
6.How does Aetrix verify that N74F126D,602 is sourced from the original manufacturer or authorized distributors?
All N74F126D,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 N74F126D,602 meets industry standards.
7.What is the process for return or replacement of N74F126D,602?
All N74F126D,602 units undergo pre-shipment inspection (PSI). If there is an issue with N74F126D,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 N74F126D,602 part is unused and in its original packaging.
Return procedure for N74F126D,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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