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NXP Semiconductors 74HC126N,652
- Part No.:
- 74HC126N,652
- Manufacturer:
- NXP Semiconductors
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
74HC126N,652.pdf
- Description:
- IC BUFFER NON-INVERT 6V 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,548
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Product details
Overview
74HC126N,652 from NXP Semiconductors is a quad 3-state non-inverting buffer/line driver in a 14-lead DIP package, operating from 2.0 V to 6.0 V with propagation delay as low as 9 ns at VCC = 6.0 V and CL = 50 pF. It features independent output-enable inputs (1OE–4OE), CMOS-level input compatibility, and ±35 mA output drive capability-used for bus interfacing, data routing, and level translation in industrial control logic systems.
For engineers reviewing the 74HC126N,652 datasheet, 74HC126N,652 pinout, 74HC126N,652 application, or 74HC126N,652 equivalent, key selection criteria include its 3-state output control timing (enable/disable times ≤32 ns at 125 °C), high-impedance OFF-state leakage <±10 µA, input clamp diodes enabling overvoltage-tolerant interfacing, and operation across −40 °C to +125 °C.
Technical Context
The 74HC126N,652 implements four independent buffer channels, each with active-HIGH output enable (nOE) controlling high-impedance tri-state output. Its CMOS input structure provides rail-to-rail voltage recognition and low input leakage (<±1.0 µA at 6.0 V), while output stages deliver symmetrical sourcing/sinking current up to ±35 mA under load.
Dynamic behavior is characterized by propagation delay (tpd), enable time (ten), and disable time (tdis) all specified across −40 °C to +125 °C, with CPD = 23 pF enabling accurate dynamic power estimation. Input transition rate limits (e.g., 139 ns/V at VCC = 4.5 V) ensure reliable switching under controlled edge rates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - supports mixed-voltage system interfacing and battery-backed logic rails |
| Propagation Delay (tpd) | 9 ns typical at VCC = 6.0 V, CL = 50 pF - enables high-speed data buffering in synchronous digital buses |
| Output Drive Strength | ±35 mA - sufficient to drive multiple TTL loads or moderate PCB trace capacitance without external buffers |
| Input Clamp Diodes | Integrated - allows safe interface to signals exceeding VCC when used with current-limiting resistors |
| Operating Temperature | −40 °C to +125 °C - qualified for extended industrial and under-hood automotive auxiliary logic |
| Power Dissipation Cap | 750 mW (DIP14, ≤70 °C) - defines thermal derating boundary for continuous operation in enclosed enclosures |
| ESD Robustness | HBM >2000 V, MM >200 V - meets IEC 61000-4-2 Level 2 immunity requirements for handling and board assembly |
Pinout & Package
74HC126N,652 uses the SOT27-1 plastic dual in-line package (DIP14) with 300-mil lead spacing, 14 leads, and through-hole mounting. Pin 1 is top-left corner with notch orientation marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1OE, 2OE, 3OE, 4OE | Active-HIGH output enable per channel - drives corresponding Y output to high-Z when LOW |
| 2, 5, 9, 12 | 1A, 2A, 3A, 4A | Data inputs - accept CMOS-level signals; clamp diodes permit overvoltage tolerance |
| 3, 6, 8, 11 | 1Y, 2Y, 3Y, 4Y | Non-inverting buffered outputs - present A input state when OE is HIGH; high-Z otherwise |
| 7 | GND | Ground reference - must be connected to system 0 V plane with low-inductance path for noise immunity |
| 14 | VCC | Positive supply - decoupling capacitor (100 nF ceramic) required within 10 mm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent 3-state buffers | Enables selective bus isolation across four parallel data paths without shared control logic |
| CMOS input compatibility | VIH = 3.15 V (min at VCC = 4.5 V) ensures robust noise margin against 3.3 V logic families |
| High-impedance OFF-state | IOZ < ±10 µA at 125 °C - prevents bus contention and leakage-induced logic errors in multi-driver systems |
| Wide temperature operation | Specified from −40 °C to +125 °C - eliminates derating calculations for industrial motor control and power supply monitoring |
| Input transition rate limit | 139 ns/V at VCC = 4.5 V - constrains maximum allowable input slew to prevent internal shoot-through current |
Applications
| Industrial PLC I/O Expansion | Legacy Microcontroller Bus Isolation |
|---|---|
Use Scenario: Adding isolated digital input/output modules to programmable logic controllers using shared backplane buses. IC Role / Device Role / Timing Role: 74HC126N,652 acts as direction-controlled bus buffer, isolating field-side sensors/actuators from CPU-side logic during configuration or fault conditions. Use Value: Prevents bus contention during hot-swap module insertion and enables simultaneous read/write on multiplexed address/data lines via OE sequencing. | Use Scenario: Interfacing 8-bit microcontrollers with legacy peripheral ICs requiring strict 3-state bus arbitration. IC Role / Device Role / Timing Role: 74HC126N,652 serves as bi-directional data latch buffer, synchronizing asynchronous peripheral responses to MCU clock domains. Use Value: Eliminates need for external pull-ups on shared data lines and reduces signal integrity issues caused by capacitive loading from long PCB traces. |
| Test Equipment Signal Routing | Automotive Body Control Module Logic |
Use Scenario: Configurable signal path selection in automated test equipment where multiple instruments share a common DUT interface bus. IC Role / Device Role / Timing Role: 74HC126N,652 functions as digitally controlled analog switch replacement for digital signals, enabling software-selectable instrument routing. Use Value: Provides deterministic propagation delay (≤30 ns max at 125 °C) critical for time-critical stimulus-response measurements. | Use Scenario: Driving LED indicators, relay drivers, and sensor interface lines in non-safety-critical automotive body electronics. IC Role / Device Role / Timing Role: 74HC126N,652 operates as general-purpose logic buffer with 125 °C rating, translating MCU GPIO outputs to higher-current loads. Use Value: Delivers guaranteed operation in engine bay ambient conditions without thermal throttling or timing drift. |
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 |
|---|---|---|---|
| 74HC125N,652 | Inverting output logic (Y = NOT A) vs. non-inverting in 74HC126N,652; identical pinout, timing, and electrical specs | Requires complementary logic inversion in upstream/downstream circuitry; unsuitable where signal polarity must be preserved | Select only if system-level logic already accounts for inversion or requires active-low output behavior |
| SN74HC126N | Same function and pinout; TI version has tighter VOH/VOL min/max spread at VCC = 4.5 V (VOH ≥ 3.98 V vs. NXP's 3.84 V min) | Valid for drop-in replacement in cost-sensitive designs where marginal VOL margin at 6 mA load is acceptable | Prefer when sourcing from TI-authorized channels; verify layout compatibility with TI's DIP14 footprint variant |
Compared with 74HC126N,652, the 74HC125N,652 requires logic inversion in signal path design, while SN74HC126N offers marginally better output voltage compliance at full load but shares identical thermal and timing behavior-making both viable alternatives depending on polarity and supply-chain constraints.
Availability
74HC126N,652 is available at Aetrix Electronics and suitable for industrial PLC expansion, legacy microcontroller bus isolation, and automotive body control module development requiring stable component supply across extended temperature ranges.
Supply support for 74HC126N,652 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 74HC126N,652 belongs to NXP's legacy HC logic family, designed for robust, low-power, pin-compatible replacements of standard TTL logic in industrial control, instrumentation, and embedded system interfaces.
FAQ
What is the maximum supply voltage rating for the 74HC126N,652?
The 74HC126N,652 has an absolute maximum supply voltage (VCC) of +7.0 V, but its recommended operating range is 2.0 V to 6.0 V. Operation above 6.0 V risks exceeding internal oxide breakdown limits and invalidates parametric guarantees. The 74HC126N,652 must not be operated continuously at 7.0 V-even briefly-as it may cause irreversible damage to the CMOS gate structures.
Does the 74HC126N,652 support TTL-level inputs?
No, the 74HC126N,652 is a CMOS-input device with VIH(min) = 3.15 V at VCC = 4.5 V, making it incompatible with standard TTL logic thresholds (VIH ≈ 2.0 V). For TTL-compatible operation, use the pin-compatible 74HCT126N variant instead. The 74HC126N,652 requires CMOS-level signaling or level-shifting circuitry when interfacing with legacy TTL outputs.
How does the 74HC126N,652 behave when an input exceeds VCC?
The 74HC126N,652 includes integrated input clamp diodes that safely conduct current to VCC when VI > VCC + 0.5 V, provided external current-limiting resistors are used. This allows direct interfacing with signals up to 7.0 V (absolute max) without damage-but sustained overvoltage will increase ICC and must be thermally managed. The 74HC126N,652 is not intended for continuous operation with VI > VCC.
What is the worst-case propagation delay for the 74HC126N,652 at 125 °C?
At VCC = 6.0 V and Tamb = +125 °C, the maximum propagation delay (tpd) for the 74HC126N,652 is 26 ns, as specified in Table 7 of the NXP datasheet. This value applies to the A-to-Y path under CL = 50 pF loading and represents the guaranteed upper bound for timing analysis in high-temperature industrial environments.
Can the 74HC126N,652 outputs drive LEDs directly?
Yes-the 74HC126N,652 can source or sink up to ±35 mA per output, sufficient to drive standard 20 mA LEDs with appropriate series resistors. However, total package current must remain within ICC(max) = 70 mA and Ptot ≤ 750 mW (derated above 70 °C). For multi-LED operation, verify combined output current and thermal dissipation; the 74HC126N,652 is commonly used in LED status indicator banks in industrial HMIs.
74HC126N,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HC
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-DIP
74HC126N,652 FAQ
1.How can I place an order for 74HC126N,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC126N,652 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 74HC126N,652 reliable?
The price and inventory of 74HC126N,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC126N,652 is usually 5 days.
3.What payment methods are accepted for 74HC126N,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC126N,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC126N,652?
74HC126N,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC126N,652 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 74HC126N,652?
For technical support, including 74HC126N,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC126N,652 requirements.
6.How does Aetrix verify that 74HC126N,652 is sourced from the original manufacturer or authorized distributors?
All 74HC126N,652 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 74HC126N,652 meets industry standards.
7.What is the process for return or replacement of 74HC126N,652?
All 74HC126N,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC126N,652, 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 74HC126N,652 part is unused and in its original packaging.
Return procedure for 74HC126N,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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