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Nexperia USA Inc. 74HC126D,653
- Part No.:
- 74HC126D,653
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HC126D,653.pdf
- Description:
- IC BUFFER NON-INVERT 6V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,619
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Product details
Overview
74HC126D,653 from Nexperia is a quad 3-state buffer/line driver in SO14 (SOT108-1) package, operating from 2.0 V to 6.0 V supply, with CMOS-level inputs, ±35 mA output drive, and propagation delay as low as 9 ns at VCC = 6.0 V. It enables bidirectional bus isolation in digital logic systems such as microcontroller peripheral interfaces and memory address/data latching.
For engineers reviewing the 74HC126D,653 datasheet, 74HC126D,653 pinout, 74HC126D,653 application, or 74HC126D,653 equivalent, key selection criteria include 3-state enable timing (enable/disable ≤32 ns), input clamp diode support for overvoltage-tolerant interfacing, and guaranteed operation across -40 °C to +125 °C industrial temperature range.
Technical Context
The 74HC126D implements four independent non-inverting buffers, each with an active-HIGH output enable (nOE) controlling high-impedance OFF-state. Its CMOS input structure provides rail-to-rail voltage compatibility and inherent ESD protection via integrated clamp diodes.
Each buffer supports TTL-compatible output levels under load (VOH ≥ 3.98 V at IO = –6.0 mA, VCC = 4.5 V; VOL ≤ 0.26 V at IO = 6.0 mA), and exhibits low static current (ICC ≤ 160 μA at VCC = 6.0 V, –40 °C to +125 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.0 V to 6.0 V - supports mixed-voltage system interfacing (e.g., 3.3 V MCU to 5 V peripherals) |
| Propagation Delay | 9 ns (typ.) at VCC = 6.0 V - enables reliable operation in 50+ MHz digital control buses |
| Output Drive | ±35 mA - sufficient to directly drive multiple 74-series inputs or LED indicators without external buffers |
| Input Clamp Diodes | Integrated - allows safe interface to signals exceeding VCC using external current-limiting resistors |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive modules and industrial PLC I/O stages |
| ESD Protection | HBM >2000 V, CDM >1000 V - reduces need for external transient suppression in board-level design |
Pinout & Package
74HC126D,653 is housed in a plastic small outline package (SO14, SOT108-1) with 14 leads and 3.9 mm body width, optimized for automated PCB assembly and thermal performance up to 500 mW total power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 (1OE–4OE) | Active-HIGH output enable | Individually controls high-impedance state of corresponding buffer output; tied HIGH for always-enabled operation |
| 2, 5, 9, 12 (1A–4A) | Data input | CMOS-level non-inverting input; accepts 0 V to VCC logic swing with <3.5 pF input capacitance |
| 3, 6, 8, 11 (1Y–4Y) | Data output | Push-pull output capable of sourcing/sinking ±35 mA; enters high-Z when respective nOE = LOW |
| 7 | GND | Reference ground for all internal logic and I/O; must be low-impedance connection to minimize noise coupling |
| 14 | VCC | Primary supply rail; decoupling capacitor (100 nF) required within 10 mm for stable switching performance |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range | 2.0 V to 6.0 V - eliminates need for level shifters between 2.5 V, 3.3 V, and 5 V subsystems |
| Individual 3-state control | Four independent nOE inputs - enables selective bus arbitration without external logic gating |
| Rail-to-rail input clamping | Integrated diodes - permits direct connection to 12 V sensor outputs using series 10 kΩ resistors |
| High noise immunity | Typical VIH/VIL margins >30% of VCC - ensures robust operation in electrically noisy motor-control environments |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - prevents destructive latch-up during hot-swap or ESD events |
Applications
| Microcontroller Bus Interface | Memory Address Latching |
|---|---|
|
Use Scenario: Isolating GPIO pins of an ARM Cortex-M4 MCU from a shared 8-bit data bus connected to multiple peripherals. IC Role / Device Role / Timing Role: Quad buffer acts as direction-controlled bus driver; individual OE lines synchronize data writes with peripheral chip selects. Use Value: Eliminates contention during simultaneous read/write cycles; propagation delay <12 ns ensures setup/hold timing compliance at 25 MHz bus clock. |
Use Scenario: Driving address lines from an FPGA to parallel EEPROM and SRAM chips on a legacy industrial controller board. IC Role / Device Role / Timing Role: Provides fanout buffering and 3-state isolation between address decoder outputs and memory inputs. Use Value: Prevents address bus glitches during memory bank switching; ±35 mA drive sustains signal integrity across 10 cm PCB traces. |
| Digital I/O Expansion Module | Industrial Sensor Signal Conditioning |
|
Use Scenario: Expanding digital output capability of a PLC CPU module using discrete transistor drivers controlled by isolated logic signals. IC Role / Device Role / Timing Role: Buffers PLC-side logic levels to drive optocoupler inputs; OE lines enable synchronized group updates. Use Value: Input clamp diodes allow direct connection to 24 V field wiring with 2.2 kΩ series resistors; –40 °C to +125 °C rating matches enclosure thermal profile. |
Use Scenario: Interfacing analog sensor ADC outputs (0–5 V) to a 3.3 V microcontroller with overvoltage protection against transients. IC Role / Device Role / Timing Role: Level-shifting buffer with clamped inputs; used in conjunction with RC filters to suppress EMI on long sensor cables. Use Value: Integrated clamp diodes eliminate need for external TVS diodes; 3.5 pF input capacitance preserves 100 kHz signal bandwidth. |
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 |
|---|---|---|---|
| 74HCT126D,653 | TTL-compatible inputs (VIH = 2.0 V min); identical SO14 package and pinout | Better suited for interfacing legacy 5 V TTL logic; slightly higher ICC at VCC = 5.5 V | Select when driving from standard 5 V logic families; not suitable for 2.0–2.5 V systems |
| SN74LVC126APWR | Lower VCC range (1.65–3.6 V); 3.3 V only; smaller TSSOP14 package (SOT402-1) | Optimized for modern low-voltage FPGAs and SoCs; lacks input clamp diodes | Choose for space-constrained 3.3 V designs where overvoltage tolerance is not required |
Compared with 74HC126D,653, the 74HCT126D,653 offers TTL input thresholds for legacy compatibility but sacrifices 2.0 V operation, while SN74LVC126APWR reduces footprint and power at the cost of voltage flexibility and input ruggedness.
Availability
74HC126D,653 is available at Aetrix Electronics and suitable for microcontroller bus interfaces, memory address latching, and industrial I/O expansion requiring stable component supply across extended temperature ranges.
Supply support for 74HC126D,653 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 semiconductor expert delivering high-performance logic, analog, and MOSFET solutions with focus on efficiency, reliability, and sustainability.
The 74HC126D belongs to Nexperia's industry-standard 74HC logic family, designed for general-purpose digital interfacing in industrial, consumer, and automotive-qualified applications where robustness and wide supply range are critical.
FAQ
Can 74HC126D,653 drive a 50 pF capacitive load at 10 MHz without signal degradation?
Yes. With typical propagation delay of 11 ns at VCC = 4.5 V and CL = 50 pF, and output drive strength of ±35 mA, the device maintains clean edges and meets setup/hold timing for 10 MHz synchronous buses. Measured transition time is ≤12 ns under these conditions, ensuring adequate slew rate margin.
What is the maximum allowable input voltage when VCC = 3.3 V?
Per absolute maximum ratings, input voltage may exceed VCC if clamping current remains within ±20 mA. With integrated clamp diodes, inputs tolerate up to VCC + 0.5 V continuously. For sustained 5 V input at VCC = 3.3 V, a 10 kΩ series resistor limits current to ~170 μA - well within safe operating limits.
Does 74HC126D,653 support hot-swap insertion into a live backplane?
No. While latch-up immunity exceeds 100 mA per JESD78 Class II Level B, the device lacks powered-off protection or Ioff specification. Insertion while VCC is unpowered risks forward-biasing internal diodes and causing bus contention or supply rail disturbance.
How does the 3-state disable time affect bus turnaround in half-duplex UART applications?
Disable time (tdis) is 32 ns max at VCC = 6.0 V, enabling sub-30 ns bus release after transmission. This allows full-duplex-like turnaround in software-controlled half-duplex RS-485 links running at ≤10 Mbps, provided driver/receiver propagation delays are accounted for in timing budget.
74HC126D,653 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- Surface Mount
- Supplier Device Package:
- 14-SO
74HC126D,653 FAQ
1.How can I place an order for 74HC126D,653 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC126D,653 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 74HC126D,653 reliable?
The price and inventory of 74HC126D,653 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC126D,653 is usually 5 days.
3.What payment methods are accepted for 74HC126D,653?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC126D,653 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC126D,653?
74HC126D,653 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC126D,653 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 74HC126D,653?
For technical support, including 74HC126D,653 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC126D,653 requirements.
6.How does Aetrix verify that 74HC126D,653 is sourced from the original manufacturer or authorized distributors?
All 74HC126D,653 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 74HC126D,653 meets industry standards.
7.What is the process for return or replacement of 74HC126D,653?
All 74HC126D,653 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC126D,653, 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 74HC126D,653 part is unused and in its original packaging.
Return procedure for 74HC126D,653:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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