My Inquiry
My Account
Nexperia USA Inc. 74HCT126PW,112
- Part No.:
- 74HCT126PW,112
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HCT126PW,112.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,959
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74HCT126PW,112 from Nexperia is a quad 3-state buffer/line driver with TTL-compatible inputs and CMOS outputs, operating from 4.5 V to 5.5 V, delivering ±6 mA drive strength at VCC = 4.5 V, propagation delay of 14 ns (typ) at CL = 50 pF, and rated for -40 °C to +125 °C industrial temperature range - used in bidirectional bus interfacing and level translation between legacy TTL logic and modern CMOS systems.
For engineers reviewing the 74HCT126PW,112 datasheet, 74HCT126PW,112 pinout, 74HCT126PW,112 application, or 74HCT126PW,112 equivalent, key selection criteria include TTL-level input compatibility, 3-state output enable timing (ten = 13 ns typ), low static current (ICC ≤ 8 μA at 25 °C), and TSSOP14 package suitability for high-density PCB layouts.
Technical Context
This device implements four independent non-inverting buffers, each with an active-HIGH output enable (nOE) controlling high-impedance OFF-state on the corresponding nY output. Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
It operates under JEDEC JESD7A compliance (2.0 V–6.0 V) and JESD8C (2.7 V–3.6 V), supports 50 pF capacitive loads, and exhibits defined VIH/VIL thresholds (2.0 V/0.8 V min/max at VCC = 4.5 V–5.5 V) ensuring robust noise immunity in mixed-logic environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures direct compatibility with 5 V TTL and mixed-voltage 5 V/3.3 V system rails. |
| Input Logic Type | TTL-level - accepts standard 5 V TTL VIH ≥ 2.0 V and VIL ≤ 0.8 V, eliminating need for external level shifters. |
| Output Drive | ±6.0 mA at VCC = 4.5 V - sufficient to drive 50 Ω transmission lines or multiple 74-series inputs without fanout limitation. |
| Propagation Delay | 14 ns (typ) at VCC = 4.5 V, CL = 50 pF - enables reliable operation in 30 MHz+ digital control buses and address/data latching. |
| Enable/Disable Time | ten = 13 ns, tdis = 18 ns (typ) - guarantees clean bus arbitration with minimal glitch window during state transitions. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive modules, industrial PLC I/O, and extended-range embedded controllers. |
| Power Dissipation | CPD = 24 pF - determines dynamic power as PD = CPD × VCC² × fi × N, enabling accurate thermal budgeting in high-switching-rate applications. |
Pinout & Package
TSSOP14 plastic thin shrink small outline package (SOT402-1); 14-lead, 0.65 mm pitch, 4.4 mm body width, 1.2 mm max height - optimized for automated SMT assembly and thermal performance in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE (1OE–4OE) | Active-HIGH output enable inputs - assert HIGH to activate corresponding buffer output; LOW forces high-impedance state for bus sharing. |
| 2, 5, 9, 12 | nA (1A–4A) | Non-inverting data inputs - pass through to nY when respective nOE is HIGH; clamped to protect against overvoltage. |
| 3, 6, 8, 11 | nY (1Y–4Y) | 3-state buffered outputs - drive HIGH/LOW or float (Z) depending on nOE state; capable of sourcing/sinking ±6 mA. |
| 7 | GND | Ground reference (0 V) - must be low-impedance connection to minimize ground bounce in multi-buffer switching. |
| 14 | VCC | Positive supply rail - decoupling capacitor (100 nF ceramic) required within 5 mm for stable high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V - eliminates need for external translators when interfacing with legacy 5 V microcontrollers or FPGAs. |
| Clamp diode protection | Integrated input diodes allow safe interface to signals up to VCC + 0.5 V using series current-limiting resistors - simplifies mixed-rail debugging and hot-swap design. |
| High noise immunity | Typical noise margin > 0.8 V at VCC = 5 V - prevents false triggering in electrically noisy industrial environments (e.g., motor drives, relay banks). |
| Low static power | ICC ≤ 8 μA at 25 °C - enables use in always-on monitoring circuits without compromising battery life in backup power domains. |
| JEDEC-compliant 3-state timing | ten/tdis < 42 ns max over full temp/voltage range - ensures deterministic bus release timing for IEEE 1149.1 JTAG boundary scan and shared memory bus protocols. |
Applications
| Industrial Bus Interface | Microcontroller GPIO Expansion |
|---|---|
|
Use Scenario: Isolating and driving parallel address/data buses between a 5 V MCU and peripheral ICs in programmable logic controllers. IC Role / Device Role / Timing Role: Quad buffer provides direction-controlled signal conditioning and load isolation; 3-state outputs enable time-multiplexed bus sharing. Use Value: Enables single 5 V rail to drive up to four independent peripheral channels while maintaining signal integrity at 20 MHz clock rates. |
Use Scenario: Expanding limited GPIO count of an ARM Cortex-M0+ MCU to control eight discrete solenoid drivers in a factory automation module. IC Role / Device Role / Timing Role: Acts as level-shifting output expander with TTL-compatible inputs synchronized to MCU clock domain. Use Value: Delivers ±6 mA per channel - sufficient to directly drive ULN2003A inputs without additional transistors or pull-up resistors. |
| Legacy System Upgrade | Test Equipment Signal Conditioning |
|
Use Scenario: Replacing obsolete 74LS126 in aging test fixtures requiring backward-compatible logic but improved power efficiency and temperature range. IC Role / Device Role / Timing Role: Pin-for-pin drop-in replacement with identical SO14/TSSOP14 footprint and function, but lower ICC and wider temp rating. Use Value: Reduces fixture standby power by >95% versus LS family while supporting operation in uncooled environmental chambers up to +125 °C. |
Use Scenario: Buffering and isolating DUT control signals in automated test equipment where signal integrity and crosstalk suppression are critical. IC Role / Device Role / Timing Role: Provides matched propagation delays (<25 ns variation across all four channels) and controlled edge rates (tt = 5–12 ns). Use Value: Eliminates timing skew between parallel stimulus channels, improving test repeatability and reducing false-fail rate in high-volume production testing. |
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 |
|---|---|---|---|
| 74HCT125PW,112 | Active-LOW output enable (nOE) instead of active-HIGH - requires inverted control logic or external inverter. | Suitable only where existing firmware or FPGA logic already generates active-LOW enables; not drop-in for 74HCT126 designs. | Select only if board layout rework is acceptable and control signal polarity can be adjusted. |
| SN74HCT126PWR | Same logic function and pinout, but TI's version has slightly higher ICC (max 20 μA vs 160 μA at +125 °C) and different ESD ratings (HBM 4 kV vs 2 kV). | Valid for commercial-temp (0 °C to +70 °C) applications; not rated for -40 °C to +125 °C industrial use without derating. | Prefer for cost-sensitive consumer-grade designs with ambient temperature < 70 °C and no ESD-critical handling requirements. |
Compared with 74HCT126PW,112, the 74HCT125PW,112 requires control logic inversion and the SN74HCT126PWR lacks full industrial temperature qualification - making the Nexperia part uniquely suitable for ruggedized, drop-in-replacement, and high-reliability embedded deployments.
Availability
74HCT126PW,112 is available at Aetrix Electronics and suitable for industrial bus interface, microcontroller GPIO expansion, legacy system upgrade, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT126PW,112 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 focused on essential efficiency technologies - delivering high-performance, reliable, and scalable logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74HCT series targets industrial and automotive-qualified logic interfacing, designed specifically to bridge legacy TTL systems with modern CMOS architectures while meeting stringent AEC-Q100 and JEDEC reliability standards.
FAQ
Can 74HCT126PW,112 operate at 3.3 V supply?
No. The 74HCT126PW,112 is specified only for 4.5 V to 5.5 V operation per its recommended conditions. At 3.3 V, input thresholds (VIH = 2.0 V min) become marginal, and output drive degrades below usable levels. Use 74HC126PW,112 for 2.0–6.0 V operation including 3.3 V.
What is the maximum capacitive load this device can drive reliably?
The datasheet specifies dynamic characteristics up to 50 pF load capacitance. Driving >50 pF increases propagation delay and transition time - e.g., at 100 pF, tpd rises to ~36 ns and tt extends to ~25 ns. For >50 pF, add series termination or reduce trace length to maintain signal integrity.
Is the TSSOP14 package RoHS and REACH compliant?
Yes. Nexperia confirms SOT402-1 (TSSOP14) packaging for 74HCT126PW,112 meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free terminations and halogen-free molding compound - certified in the official Nexperia Product Change Notification PCN-2023-001.
How does the input clamp diode affect interfacing with 12 V signals?
The internal clamp diodes allow safe interface to voltages up to VCC + 0.5 V. To connect 12 V signals, a series current-limiting resistor must be used - e.g., 10 kΩ limits IVCC to ~1.7 mA at 12 V, staying within the ±20 mA absolute max input clamping current rating.
74HCT126PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
74HCT126PW,112 FAQ
1.How can I place an order for 74HCT126PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT126PW,112 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 74HCT126PW,112 reliable?
The price and inventory of 74HCT126PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT126PW,112 is usually 5 days.
3.What payment methods are accepted for 74HCT126PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT126PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT126PW,112?
74HCT126PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT126PW,112 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 74HCT126PW,112?
For technical support, including 74HCT126PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT126PW,112 requirements.
6.How does Aetrix verify that 74HCT126PW,112 is sourced from the original manufacturer or authorized distributors?
All 74HCT126PW,112 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 74HCT126PW,112 meets industry standards.
7.What is the process for return or replacement of 74HCT126PW,112?
All 74HCT126PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT126PW,112, 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 74HCT126PW,112 part is unused and in its original packaging.
Return procedure for 74HCT126PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT126PW,112 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
